{
  "experiment": "ci-run",
  "generated_at": "2026-04-30 19:35 UTC",
  "workload_docs": {
    "bst-haskell": [
      {
        "mutations": [
          "insert_1"
        ],
        "tasks": [
          {
            "property": "InsertPost",
            "witnesses": [
              {
                "input": "((T E 2 1 E) 0 2 0)"
              }
            ]
          },
          {
            "property": "InsertModel",
            "witnesses": [
              {
                "input": "((T E 1 0 E) 0 0)"
              }
            ]
          },
          {
            "property": "DeleteInsert",
            "witnesses": [
              {
                "input": "((T E 1 0 E) 0 0 0)"
              }
            ]
          },
          {
            "property": "InsertInsert",
            "witnesses": [
              {
                "input": "(E 1 0 0 0)"
              }
            ]
          },
          {
            "property": "InsertUnion",
            "witnesses": [
              {
                "input": "(E (T E 1 1 E) 0 0)"
              }
            ]
          },
          {
            "property": "UnionDeleteInsert",
            "witnesses": [
              {
                "input": "((T E 2 0 E) E 0 0)"
              }
            ]
          }
        ]
      },
      {
        "mutations": [
          "insert_2"
        ],
        "tasks": [
          {
            "property": "InsertPost",
            "witnesses": [
              {
                "input": "((T E 0 1 E) 1 0 0)"
              }
            ]
          },
          {
            "property": "InsertModel",
            "witnesses": [
              {
                "input": "((T E -2 0 E) 0 0)"
              }
            ]
          },
          {
            "property": "InsertDelete",
            "witnesses": [
              {
                "input": "((T E 0 2 (T E 1 0 E)) 0 0 0)"
              }
            ]
          },
          {
            "property": "DeleteInsert",
            "witnesses": [
              {
                "input": "((T E 0 0 E) 0 1 0)"
              }
            ]
          },
          {
            "property": "InsertInsert",
            "witnesses": [
              {
                "input": "(E 0 1 0 0)"
              }
            ]
          },
          {
            "property": "InsertUnion",
            "witnesses": [
              {
                "input": "(E (T E 0 0 E) 1 0)"
              }
            ]
          },
          {
            "property": "UnionDeleteInsert",
            "witnesses": [
              {
                "input": "((T E -2 0 E) E 0 0)"
              }
            ]
          }
        ]
      },
      {
        "mutations": [
          "insert_3"
        ],
        "tasks": [
          {
            "property": "InsertPost",
            "witnesses": [
              {
                "input": "((T E 3 0 E) 3 3 1)"
              }
            ]
          },
          {
            "property": "InsertModel",
            "witnesses": [
              {
                "input": "((T E 0 1 E) 0 0)"
              }
            ]
          },
          {
            "property": "InsertDelete",
            "witnesses": [
              {
                "input": "((T (T E 0 0 E) 2 0 E) 2 2 0)"
              }
            ]
          },
          {
            "property": "InsertInsert",
            "witnesses": [
              {
                "input": "(E 0 0 1 0)"
              }
            ]
          },
          {
            "property": "InsertUnion",
            "witnesses": [
              {
                "input": "(E (T E 0 0 E) 1 0)"
              }
            ]
          },
          {
            "property": "UnionDeleteInsert",
            "witnesses": [
              {
                "input": "((T E -2 2 E) E -2 0)"
              }
            ]
          }
        ]
      },
      {
        "mutations": [
          "delete_4"
        ],
        "tasks": [
          {
            "property": "DeleteModel",
            "witnesses": [
              {
                "input": "((T E 0 0 E) 1)"
              }
            ]
          },
          {
            "property": "DeletePost",
            "witnesses": [
              {
                "input": "((T E 0 0 E) 1 0)"
              }
            ]
          },
          {
            "property": "DeleteDelete",
            "witnesses": [
              {
                "input": "((T (T (T E 0 0 E) 3 5 E) 5 0 E) 5 3)"
              }
            ]
          },
          {
            "property": "DeleteInsert",
            "witnesses": [
              {
                "input": "(E 0 1 0)"
              }
            ]
          },
          {
            "property": "DeleteUnion",
            "witnesses": [
              {
                "input": "((T E -1 0 E) (T E 0 1 E) -1)"
              }
            ]
          },
          {
            "property": "InsertDelete",
            "witnesses": [
              {
                "input": "(E 0 1 0)"
              }
            ]
          },
          {
            "property": "UnionDeleteInsert",
            "witnesses": [
              {
                "input": "((T E 0 1 E) (T E 1 0 E) 0 0)"
              }
            ]
          }
        ]
      },
      {
        "mutations": [
          "delete_5"
        ],
        "tasks": [
          {
            "property": "DeleteModel",
            "witnesses": [
              {
                "input": "((T (T E 1 0 E) 3 0 E) 1)"
              }
            ]
          },
          {
            "property": "DeletePost",
            "witnesses": [
              {
                "input": "((T (T E 2 0 E) 4 1 E) 2 2)"
              }
            ]
          },
          {
            "property": "DeleteDelete",
            "witnesses": [
              {
                "input": "((T E -4 0 (T E 4 4 E)) 4 -4)"
              }
            ]
          },
          {
            "property": "DeleteInsert",
            "witnesses": [
              {
                "input": "((T E 2 0 E) -2 -2 0)"
              }
            ]
          },
          {
            "property": "DeleteUnion",
            "witnesses": [
              {
                "input": "((T E -1 0 (T E 0 0 E)) (T E -2 2 E) -1)"
              }
            ]
          },
          {
            "property": "UnionDeleteInsert",
            "witnesses": [
              {
                "input": "((T (T E -1 0 E) 0 0 E) E 0 0)"
              }
            ]
          }
        ]
      },
      {
        "mutations": [
          "union_6"
        ],
        "tasks": [
          {
            "property": "UnionValid",
            "witnesses": [
              {
                "input": "((T E 0 0 E) (T E 0 0 E))"
              }
            ]
          },
          {
            "property": "UnionPost",
            "witnesses": [
              {
                "input": "((T E 0 0 (T E 1 1 E)) (T E 0 0 E) 1)"
              }
            ]
          },
          {
            "property": "UnionModel",
            "witnesses": [
              {
                "input": "((T E 0 0 E) (T E 0 0 E))"
              }
            ]
          },
          {
            "property": "DeleteUnion",
            "witnesses": [
              {
                "input": "((T E 2 2 E) (T E -1 0 E) -1)"
              }
            ]
          },
          {
            "property": "InsertUnion",
            "witnesses": [
              {
                "input": "(E (T E 0 0 E) 1 0)"
              }
            ]
          },
          {
            "property": "UnionDeleteInsert",
            "witnesses": [
              {
                "input": "((T E 0 0 E) (T E 0 0 E) 0 0)"
              }
            ]
          },
          {
            "property": "UnionUnionAssoc",
            "witnesses": [
              {
                "input": "((T E 0 1 E) (T E 0 1 E) (T E 0 0 E))"
              }
            ]
          }
        ]
      },
      {
        "mutations": [
          "union_7"
        ],
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          {
            "property": "UnionValid",
            "witnesses": [
              {
                "input": "(E (T E 0 2 (T E 0 0 E)))"
              }
            ]
          },
          {
            "property": "UnionPost",
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              {
                "input": "((T (T E -2 0 E) 2 0 E) (T E 0 0 E) -2)"
              }
            ]
          },
          {
            "property": "UnionModel",
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              {
                "input": "((T E -1 0 E) (T (T E -2 1 E) 0 0 E))"
              }
            ]
          },
          {
            "property": "DeleteUnion",
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              {
                "input": "((T E 0 0 E) (T (T E 0 0 E) 2 0 E) 2)"
              }
            ]
          },
          {
            "property": "InsertUnion",
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              {
                "input": "((T E 0 0 E) (T E 1 1 E) 1 0)"
              }
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          },
          {
            "property": "UnionDeleteInsert",
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              {
                "input": "((T (T E -1 0 E) 0 0 E) E 0 0)"
              }
            ]
          },
          {
            "property": "UnionUnionAssoc",
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              {
                "input": "((T E 0 0 E) (T E 1 0 E) (T E 1 1 E))"
              }
            ]
          }
        ]
      },
      {
        "mutations": [
          "union_8"
        ],
        "tasks": [
          {
            "property": "UnionPost",
            "witnesses": [
              {
                "input": "((T (T E 4 4 E) 2147483647 0 E) (T E 4 0 E) 4)"
              }
            ]
          },
          {
            "property": "UnionModel",
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              {
                "input": "((T (T E -2 0 E) 2 0 E) (T E -2 1 E))"
              }
            ]
          },
          {
            "property": "DeleteUnion",
            "witnesses": [
              {
                "input": "((T (T E -2 0 E) 1 0 E) (T E 0 0 E) 1)"
              }
            ]
          },
          {
            "property": "InsertUnion",
            "witnesses": [
              {
                "input": "((T E 2 2 E) (T E -1 1 E) -1 0)"
              }
            ]
          },
          {
            "property": "UnionDeleteInsert",
            "witnesses": [
              {
                "input": "((T E -1 3 E) (T E 3 1 E) -1 0)"
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            ]
          },
          {
            "property": "UnionUnionAssoc",
            "witnesses": [
              {
                "input": "((T E 2 1 E) (T E 2 0 E) (T E 0 0 E))"
              }
            ]
          }
        ]
      }
    ]
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      "time": "0.001277s",
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      "discards": 132,
      "time": "0.021961s",
      "counterexample": "((T (E) -977 -999 (E)),-993,-977,-954)",
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      "time": "0.080592s",
      "counterexample": "((T (E) -963 -991 (E)),-924,-963,-951)",
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    {
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      "time": "0.070343s",
      "counterexample": "((T (T (E) -998 -981 (E)) -985 -983 (E)),-953,-985,-951)",
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    {
      "experiment": "ci-run",
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      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:07:36.904401854+00:00",
      "status": "Failed",
      "tests": 1763,
      "discards": 851,
      "time": "0.128769s",
      "counterexample": "((T (E) -958 -942 (T (E) -939 -947 (E))),-872,-958,-889)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:07:37.036783537+00:00",
      "status": "Failed",
      "tests": 3342,
      "discards": 7285,
      "time": "0.251307s",
      "counterexample": "((T (E) -60 620 (T (E) 691 501 (E))),-863,-60,508)",
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    },
    {
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      "property": "prop_InsertPost",
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        "insert_1"
      ],
      "mode": "solve",
      "trial": 1,
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      "timestamp": "2026-04-30T18:07:37.291893051+00:00",
      "status": "Failed",
      "tests": 478,
      "discards": 1091,
      "time": "0.038715s",
      "counterexample": "((T (T (E) -15 473 (E)) 0 319 (E)),544,0,442)",
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        "insert_1"
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      "mode": "solve",
      "trial": 2,
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      "timestamp": "2026-04-30T18:07:37.334049903+00:00",
      "status": "Failed",
      "tests": 11939,
      "discards": 25944,
      "time": "0.867551s",
      "counterexample": "((T (E) -715 481 (T (E) 128 357 (T (E) 244 119 (E)))),225,-715,429)",
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      "property": "prop_InsertPost",
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        "insert_1"
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      "mode": "solve",
      "trial": 3,
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      "timestamp": "2026-04-30T18:07:38.206548540+00:00",
      "status": "Failed",
      "tests": 14202,
      "discards": 30689,
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      "counterexample": "((T (E) -171 161 (T (E) 166 -38 (E))),-127,-171,354)",
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      "property": "prop_InsertPost",
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        "insert_1"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:07:39.250993133+00:00",
      "status": "Failed",
      "tests": 2257,
      "discards": 5247,
      "time": "0.174208s",
      "counterexample": "((T (E) -217 -32 (E)),-780,-217,-385)",
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    {
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      "property": "prop_InsertPost",
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        "insert_1"
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      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:07:39.428906886+00:00",
      "status": "Failed",
      "tests": 3023,
      "discards": 6410,
      "time": "0.219504s",
      "counterexample": "((T (E) -239 -137 (E)),-93,-239,-829)",
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    {
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        "insert_1"
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      "mode": "solve",
      "trial": 6,
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      "timestamp": "2026-04-30T18:07:39.652330461+00:00",
      "status": "Failed",
      "tests": 366,
      "discards": 755,
      "time": "0.027929s",
      "counterexample": "((T (E) -70 765 (T (E) 355 -317 (E))),235,-70,-63)",
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      "mode": "solve",
      "trial": 7,
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      "timestamp": "2026-04-30T18:07:39.683669998+00:00",
      "status": "Failed",
      "tests": 3986,
      "discards": 8499,
      "time": "0.288961s",
      "counterexample": "((T (E) 23 6 (T (E) 129 -566 (E))),389,129,296)",
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    {
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      "property": "prop_InsertPost",
      "mutations": [
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      "mode": "solve",
      "trial": 8,
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      "timestamp": "2026-04-30T18:07:39.976678404+00:00",
      "status": "Failed",
      "tests": 905,
      "discards": 1910,
      "time": "0.065954s",
      "counterexample": "((T (E) -113 -597 (E)),697,-113,782)",
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      "mode": "solve",
      "trial": 9,
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      "timestamp": "2026-04-30T18:07:40.046281114+00:00",
      "status": "Failed",
      "tests": 1078,
      "discards": 2408,
      "time": "0.082943s",
      "counterexample": "((T (E) -121 -130 (E)),693,-121,40)",
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    {
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      "strategy": "Small",
      "property": "InsertPost",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 0,
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      "timestamp": "2026-04-30T18:07:40.133213235+00:00",
      "status": "timed_out",
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    {
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      "property": "prop_InsertPost",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 0,
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      "timestamp": "2026-04-30T18:08:40.136247839+00:00",
      "status": "Failed",
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      "time": "0.000326s",
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      "timestamp": "2026-04-30T18:08:40.139806623+00:00",
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      "trial": 2,
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      "timestamp": "2026-04-30T18:08:40.143130791+00:00",
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      "time": "0.000267s",
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      "property": "prop_InsertPost",
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      "time": "0.000307s",
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      "timestamp": "2026-04-30T18:08:40.149662163+00:00",
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      "timestamp": "2026-04-30T18:08:40.152819557+00:00",
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      "timestamp": "2026-04-30T18:08:40.159107274+00:00",
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      "time": "0.000298s",
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      "timestamp": "2026-04-30T18:08:40.168984690+00:00",
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      "time": "0.000344s",
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      "time": "0.000355s",
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      "timestamp": "2026-04-30T18:08:40.179475109+00:00",
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      "mode": "solve",
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      "timestamp": "2026-04-30T18:08:40.182910024+00:00",
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      "time": "0.000342s",
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      "timestamp": "2026-04-30T18:08:40.186450301+00:00",
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      "time": "0.000440s",
      "counterexample": "((T (E) 0 0 (E)),1,0,0)",
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      "mode": "solve",
      "trial": 6,
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      "timestamp": "2026-04-30T18:08:40.189855951+00:00",
      "status": "Failed",
      "tests": 13,
      "discards": null,
      "time": "0.000339s",
      "counterexample": "((T (E) 0 0 (E)),1,0,0)",
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      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:08:40.193315767+00:00",
      "status": "Failed",
      "tests": 13,
      "discards": null,
      "time": "0.000340s",
      "counterexample": "((T (E) 0 0 (E)),1,0,0)",
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    },
    {
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      "property": "prop_InsertPost",
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      "mode": "solve",
      "trial": 8,
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      "timestamp": "2026-04-30T18:08:40.196645661+00:00",
      "status": "Failed",
      "tests": 13,
      "discards": null,
      "time": "0.000400s",
      "counterexample": "((T (E) 0 0 (E)),1,0,0)",
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    },
    {
      "experiment": "ci-run",
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      "property": "prop_InsertPost",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 9,
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      "timestamp": "2026-04-30T18:08:40.199912995+00:00",
      "status": "Failed",
      "tests": 13,
      "discards": null,
      "time": "0.000349s",
      "counterexample": "((T (E) 0 0 (E)),1,0,0)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "LeanRev",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:08:40.203741538+00:00",
      "status": "Failed",
      "tests": 14,
      "discards": null,
      "time": "0.000354s",
      "counterexample": "(1,0,0,(T (E) 0 0 (E)))",
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    {
      "experiment": "ci-run",
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      "strategy": "LeanRev",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:08:40.207159314+00:00",
      "status": "Failed",
      "tests": 14,
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      "trial": 7,
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      "tests": 29,
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      "time": "0.000659s",
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      "mode": "solve",
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      "timestamp": "2026-04-30T18:08:40.444909459+00:00",
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      "time": "0.000579s",
      "counterexample": "((T (E) 0 0 (E)),1,0)",
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      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:08:41.440941583+00:00",
      "status": "Failed",
      "tests": 768,
      "discards": 337,
      "time": "0.076981s",
      "counterexample": "((T (E) -996 -989 (E)),-926,-926,-964)",
      "hash": "01dbac718b6071a735e1bc855199a1a95099f4bc"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:08:41.521549290+00:00",
      "status": "Failed",
      "tests": 1130,
      "discards": 507,
      "time": "0.084712s",
      "counterexample": "((T (E) -784 -778 (E)),-661,-661,-405)",
      "hash": "01dbac718b6071a735e1bc855199a1a95099f4bc"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:08:41.610072645+00:00",
      "status": "Failed",
      "tests": 908,
      "discards": 396,
      "time": "0.067168s",
      "counterexample": "((T (T (E) -987 -987 (E)) -983 -964 (E)),-966,-966,-990)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:08:41.681456064+00:00",
      "status": "Failed",
      "tests": 9168,
      "discards": 19910,
      "time": "0.683864s",
      "counterexample": "((T (E) 362 -212 (E)),130,130,61)",
      "hash": "01dbac718b6071a735e1bc855199a1a95099f4bc"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:08:42.369379190+00:00",
      "status": "Failed",
      "tests": 2945,
      "discards": 6324,
      "time": "0.219226s",
      "counterexample": "((T (E) -39 86 (E)),55,55,728)",
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    },
    {
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      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:08:42.592456220+00:00",
      "status": "Failed",
      "tests": 12500,
      "discards": 27127,
      "time": "0.924994s",
      "counterexample": "((T (E) -218 64 (E)),591,591,-562)",
      "hash": "01dbac718b6071a735e1bc855199a1a95099f4bc"
    },
    {
      "experiment": "ci-run",
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      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:08:43.522108829+00:00",
      "status": "Failed",
      "tests": 874,
      "discards": 1994,
      "time": "0.070877s",
      "counterexample": "((T (E) 468 663 (E)),5,5,-431)",
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    },
    {
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      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:08:43.596376450+00:00",
      "status": "Failed",
      "tests": 4818,
      "discards": 10186,
      "time": "0.352511s",
      "counterexample": "((T (E) -87 -49 (E)),299,299,25)",
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    },
    {
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      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:08:43.952708585+00:00",
      "status": "Failed",
      "tests": 1391,
      "discards": 2982,
      "time": "0.104765s",
      "counterexample": "((T (E) 453 -199 (E)),-253,-253,-162)",
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    },
    {
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      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:08:44.061067291+00:00",
      "status": "Failed",
      "tests": 4257,
      "discards": 9208,
      "time": "0.318627s",
      "counterexample": "((T (E) -599 576 (T (E) 792 -274 (E))),-99,-99,616)",
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    },
    {
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      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:08:44.383676128+00:00",
      "status": "Failed",
      "tests": 14639,
      "discards": 31759,
      "time": "1.076907s",
      "counterexample": "((T (E) 214 784 (E)),48,48,342)",
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    },
    {
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      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:08:45.465226949+00:00",
      "status": "Failed",
      "tests": 11776,
      "discards": 25654,
      "time": "0.889104s",
      "counterexample": "((T (T (E) -73 -452 (E)) 150 88 (E)),818,818,312)",
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    },
    {
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      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:08:46.359237097+00:00",
      "status": "Failed",
      "tests": 12272,
      "discards": 26900,
      "time": "0.913329s",
      "counterexample": "((T (E) 160 3 (T (E) 483 826 (E))),-164,-164,471)",
      "hash": "01dbac718b6071a735e1bc855199a1a95099f4bc"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Small",
      "property": "DeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:08:47.278116845+00:00",
      "status": "timed_out",
      "hash": "01dbac718b6071a735e1bc855199a1a95099f4bc"
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    {
      "experiment": "ci-run",
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      "language": "Haskell",
      "strategy": "SmallRev",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:47.281906220+00:00",
      "status": "Failed",
      "tests": 9,
      "discards": 7,
      "time": "0.000552s",
      "counterexample": "(0,0,0,(T (E) 1 0 (E)))",
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    },
    {
      "experiment": "ci-run",
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      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:47.285714029+00:00",
      "status": "Failed",
      "tests": 9,
      "discards": 7,
      "time": "0.000490s",
      "counterexample": "(0,0,0,(T (E) 1 0 (E)))",
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    {
      "experiment": "ci-run",
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      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:47.289231791+00:00",
      "status": "Failed",
      "tests": 9,
      "discards": 7,
      "time": "0.000538s",
      "counterexample": "(0,0,0,(T (E) 1 0 (E)))",
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    },
    {
      "experiment": "ci-run",
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      "property": "prop_DeleteInsert",
      "mutations": [
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      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:47.292873355+00:00",
      "status": "Failed",
      "tests": 9,
      "discards": 7,
      "time": "0.000497s",
      "counterexample": "(0,0,0,(T (E) 1 0 (E)))",
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    },
    {
      "experiment": "ci-run",
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      "property": "prop_DeleteInsert",
      "mutations": [
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      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:47.296434141+00:00",
      "status": "Failed",
      "tests": 9,
      "discards": 7,
      "time": "0.000546s",
      "counterexample": "(0,0,0,(T (E) 1 0 (E)))",
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    {
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      "property": "prop_DeleteInsert",
      "mutations": [
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      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:47.299857333+00:00",
      "status": "Failed",
      "tests": 9,
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      "time": "0.000489s",
      "counterexample": "(0,0,0,(T (E) 1 0 (E)))",
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    },
    {
      "experiment": "ci-run",
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      "property": "prop_DeleteInsert",
      "mutations": [
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      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:47.303192297+00:00",
      "status": "Failed",
      "tests": 9,
      "discards": 7,
      "time": "0.000648s",
      "counterexample": "(0,0,0,(T (E) 1 0 (E)))",
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    {
      "experiment": "ci-run",
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      "property": "prop_DeleteInsert",
      "mutations": [
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      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:47.306953191+00:00",
      "status": "Failed",
      "tests": 9,
      "discards": 7,
      "time": "0.000490s",
      "counterexample": "(0,0,0,(T (E) 1 0 (E)))",
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    {
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      "property": "prop_DeleteInsert",
      "mutations": [
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      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:47.310270952+00:00",
      "status": "Failed",
      "tests": 9,
      "discards": 7,
      "time": "0.000557s",
      "counterexample": "(0,0,0,(T (E) 1 0 (E)))",
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    {
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      "property": "prop_DeleteInsert",
      "mutations": [
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      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:47.313714794+00:00",
      "status": "Failed",
      "tests": 9,
      "discards": 7,
      "time": "0.000492s",
      "counterexample": "(0,0,0,(T (E) 1 0 (E)))",
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    },
    {
      "experiment": "ci-run",
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      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:47.318081766+00:00",
      "status": "Failed",
      "tests": 16,
      "discards": null,
      "time": "0.000415s",
      "counterexample": "((T (E) 1 0 (E)),0,0,0)",
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    },
    {
      "experiment": "ci-run",
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      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:47.321739920+00:00",
      "status": "Failed",
      "tests": 16,
      "discards": null,
      "time": "0.000407s",
      "counterexample": "((T (E) 1 0 (E)),0,0,0)",
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    {
      "experiment": "ci-run",
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      "property": "prop_DeleteInsert",
      "mutations": [
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      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:47.325302614+00:00",
      "status": "Failed",
      "tests": 16,
      "discards": null,
      "time": "0.000443s",
      "counterexample": "((T (E) 1 0 (E)),0,0,0)",
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    {
      "experiment": "ci-run",
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      "property": "prop_DeleteInsert",
      "mutations": [
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      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:47.328968836+00:00",
      "status": "Failed",
      "tests": 16,
      "discards": null,
      "time": "0.000407s",
      "counterexample": "((T (E) 1 0 (E)),0,0,0)",
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    },
    {
      "experiment": "ci-run",
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      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:47.332791105+00:00",
      "status": "Failed",
      "tests": 16,
      "discards": null,
      "time": "0.000408s",
      "counterexample": "((T (E) 1 0 (E)),0,0,0)",
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    },
    {
      "experiment": "ci-run",
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      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:47.336569607+00:00",
      "status": "Failed",
      "tests": 16,
      "discards": null,
      "time": "0.000387s",
      "counterexample": "((T (E) 1 0 (E)),0,0,0)",
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    },
    {
      "experiment": "ci-run",
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      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:47.340136551+00:00",
      "status": "Failed",
      "tests": 16,
      "discards": null,
      "time": "0.000371s",
      "counterexample": "((T (E) 1 0 (E)),0,0,0)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Lean",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:47.343755587+00:00",
      "status": "Failed",
      "tests": 16,
      "discards": null,
      "time": "0.000360s",
      "counterexample": "((T (E) 1 0 (E)),0,0,0)",
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    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Lean",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:47.347374900+00:00",
      "status": "Failed",
      "tests": 16,
      "discards": null,
      "time": "0.000406s",
      "counterexample": "((T (E) 1 0 (E)),0,0,0)",
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    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Lean",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:47.350930901+00:00",
      "status": "Failed",
      "tests": 16,
      "discards": null,
      "time": "0.000361s",
      "counterexample": "((T (E) 1 0 (E)),0,0,0)",
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    {
      "experiment": "ci-run",
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      "strategy": "LeanRev",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_1"
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      "property": "prop_InsertInsert",
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      "mode": "solve",
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      "time": "0.001111s",
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      "mode": "solve",
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      "counterexample": "((E),-988,-1000,-996,-984)",
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      "mode": "solve",
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      "property": "prop_InsertInsert",
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      "mode": "solve",
      "trial": 0,
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      "property": "prop_InsertInsert",
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      "property": "prop_InsertInsert",
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      "timestamp": "2026-04-30T18:09:47.587195412+00:00",
      "status": "Failed",
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      "time": "0.000280s",
      "counterexample": "((E),0,1,0,0)",
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      "property": "prop_InsertInsert",
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      "mode": "solve",
      "trial": 5,
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      "timestamp": "2026-04-30T18:09:47.590417367+00:00",
      "status": "Failed",
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      "time": "0.000305s",
      "counterexample": "((E),0,1,0,0)",
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      "property": "prop_InsertInsert",
      "mutations": [
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      "mode": "solve",
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        "insert_1"
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      "mode": "solve",
      "trial": 5,
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      "timestamp": "2026-04-30T18:09:47.839250431+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.001143s",
      "counterexample": "((T (E) -980 -987 (E)),(T (E) -991 -988 (E)),-997,-993)",
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      "strategy": "Hedgehog",
      "property": "prop_InsertUnion",
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        "insert_1"
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      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:47.843274965+00:00",
      "status": "Failed",
      "tests": 7,
      "discards": 4,
      "time": "0.001790s",
      "counterexample": "((E),(T (E) -911 -945 (E)),-994,-971)",
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      "property": "prop_InsertUnion",
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        "insert_1"
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      "mode": "solve",
      "trial": 7,
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      "timestamp": "2026-04-30T18:09:47.847983728+00:00",
      "status": "Failed",
      "tests": 4,
      "discards": 0,
      "time": "0.001258s",
      "counterexample": "((T (T (E) -985 -999 (E)) -960 -963 (E)),(T (T (E) -998 -986 (E)) -966 -992 (E)),-994,-961)",
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      "property": "prop_InsertUnion",
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        "insert_1"
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      "mode": "solve",
      "trial": 8,
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      "timestamp": "2026-04-30T18:09:47.852233638+00:00",
      "status": "Failed",
      "tests": 7,
      "discards": 2,
      "time": "0.001505s",
      "counterexample": "((E),(T (E) -920 -931 (E)),-845,-900)",
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      "property": "prop_InsertUnion",
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        "insert_1"
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      "mode": "solve",
      "trial": 9,
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      "timestamp": "2026-04-30T18:09:47.856814271+00:00",
      "status": "Failed",
      "tests": 3,
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      "time": "0.000942s",
      "counterexample": "((E),(T (E) -992 -986 (E)),-960,-972)",
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      "property": "prop_InsertUnion",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 0,
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      "timestamp": "2026-04-30T18:09:47.862319342+00:00",
      "status": "Failed",
      "tests": 17,
      "discards": 116,
      "time": "0.006469s",
      "counterexample": "((E),(T (T (E) -233 -206 (E)) 443 96 (E)),299,415)",
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      "property": "prop_InsertUnion",
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        "insert_1"
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      "mode": "solve",
      "trial": 1,
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      "timestamp": "2026-04-30T18:09:47.871864280+00:00",
      "status": "Failed",
      "tests": 2,
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      "time": "0.004014s",
      "counterexample": "((T (E) -233 170 (E)),(T (T (E) 295 228 (E)) 592 -438 (E)),-657,383)",
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      "property": "prop_InsertUnion",
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        "insert_1"
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      "mode": "solve",
      "trial": 2,
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      "timestamp": "2026-04-30T18:09:47.879201022+00:00",
      "status": "Failed",
      "tests": 10,
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      "time": "0.004208s",
      "counterexample": "((E),(T (E) 405 -653 (E)),571,-82)",
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      "property": "prop_InsertUnion",
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      "mode": "solve",
      "trial": 3,
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      "timestamp": "2026-04-30T18:09:47.886568221+00:00",
      "status": "Failed",
      "tests": 12,
      "discards": 119,
      "time": "0.006336s",
      "counterexample": "((T (E) -511 -108 (E)),(T (E) 422 -594 (E)),-856,-173)",
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      "property": "prop_InsertUnion",
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        "insert_1"
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      "mode": "solve",
      "trial": 4,
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      "timestamp": "2026-04-30T18:09:47.896276820+00:00",
      "status": "Failed",
      "tests": 1,
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      "time": "0.000622s",
      "counterexample": "((E),(T (E) -156 448 (E)),86,221)",
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      "property": "prop_InsertUnion",
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      "mode": "solve",
      "trial": 5,
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      "timestamp": "2026-04-30T18:09:47.900059162+00:00",
      "status": "Failed",
      "tests": 9,
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      "time": "0.006345s",
      "counterexample": "((E),(T (E) 233 -346 (E)),868,803)",
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      "property": "prop_InsertUnion",
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      "mode": "solve",
      "trial": 6,
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      "timestamp": "2026-04-30T18:09:47.909522728+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 0,
      "time": "0.000237s",
      "counterexample": "((E),(T (E) -362 589 (E)),282,203)",
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      "mode": "solve",
      "trial": 7,
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      "timestamp": "2026-04-30T18:09:47.912740776+00:00",
      "status": "Failed",
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      "time": "0.001241s",
      "counterexample": "((E),(T (E) -264 -101 (E)),-135,-44)",
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      "property": "prop_InsertUnion",
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      "mode": "solve",
      "trial": 8,
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      "timestamp": "2026-04-30T18:09:47.916979299+00:00",
      "status": "Failed",
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      "time": "0.003944s",
      "counterexample": "((E),(T (E) 133 -111 (E)),855,233)",
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      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:47.924219662+00:00",
      "status": "Failed",
      "tests": 11,
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      "time": "0.004195s",
      "counterexample": "((E),(T (E) -221 -101 (E)),140,-289)",
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      "property": "prop_InsertUnion",
      "mutations": [
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      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:47.933394859+00:00",
      "status": "Failed",
      "tests": 2039,
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      "mode": "solve",
      "trial": 1,
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      "timestamp": "2026-04-30T18:09:48.222610436+00:00",
      "status": "Failed",
      "tests": 2039,
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      "counterexample": "((E),(T (E) 0 0 (E)),1,0)",
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      "mode": "solve",
      "trial": 2,
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      "timestamp": "2026-04-30T18:09:48.507436622+00:00",
      "status": "Failed",
      "tests": 2039,
      "discards": 8,
      "time": "0.281303s",
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      "mode": "solve",
      "trial": 3,
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      "timestamp": "2026-04-30T18:09:48.792666468+00:00",
      "status": "Failed",
      "tests": 2039,
      "discards": 8,
      "time": "0.279831s",
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      "mode": "solve",
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      "timestamp": "2026-04-30T18:09:49.076252534+00:00",
      "status": "Failed",
      "tests": 2039,
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      "mode": "solve",
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      "status": "Failed",
      "tests": 2039,
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      "status": "Failed",
      "tests": 2039,
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      "mode": "solve",
      "trial": 7,
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      "timestamp": "2026-04-30T18:09:49.926771934+00:00",
      "status": "Failed",
      "tests": 2039,
      "discards": 8,
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      "mode": "solve",
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      "timestamp": "2026-04-30T18:09:50.213970984+00:00",
      "status": "Failed",
      "tests": 2039,
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      "mode": "solve",
      "trial": 9,
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      "timestamp": "2026-04-30T18:09:50.497942567+00:00",
      "status": "Failed",
      "tests": 2039,
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      "property": "prop_InsertUnion",
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      "mode": "solve",
      "trial": 0,
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      "timestamp": "2026-04-30T18:09:50.783266850+00:00",
      "status": "Failed",
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      "mode": "solve",
      "trial": 1,
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      "timestamp": "2026-04-30T18:09:50.786671639+00:00",
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      "mode": "solve",
      "trial": 2,
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      "timestamp": "2026-04-30T18:09:50.789864133+00:00",
      "status": "Failed",
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      "mode": "solve",
      "trial": 3,
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      "status": "Failed",
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      "timestamp": "2026-04-30T18:09:50.796172556+00:00",
      "status": "Failed",
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      "mode": "solve",
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      "status": "Failed",
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      "mode": "solve",
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      "timestamp": "2026-04-30T18:09:50.802457993+00:00",
      "status": "Failed",
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      "mode": "solve",
      "trial": 7,
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      "timestamp": "2026-04-30T18:09:50.805658615+00:00",
      "status": "Failed",
      "tests": 4,
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      "time": "0.000277s",
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      "mode": "solve",
      "trial": 8,
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      "timestamp": "2026-04-30T18:09:50.808789099+00:00",
      "status": "Failed",
      "tests": 4,
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      "time": "0.000266s",
      "counterexample": "(1,0,(E),(T (E) 0 0 (E)))",
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      "hash": "01dbac718b6071a735e1bc855199a1a95099f4bc"
    },
    {
      "experiment": "ci-run",
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      "language": "Haskell",
      "strategy": "Correct",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:50.933050698+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.000401s",
      "counterexample": "((T (T (E) -3 3 (E)) 3 1 (E)),(T (E) -3 -2 (T (E) 1 2 (E))),3,-2)",
      "hash": "01dbac718b6071a735e1bc855199a1a95099f4bc"
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    {
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      "strategy": "Correct",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:50.936187164+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 0,
      "time": "0.000387s",
      "counterexample": "((E),(T (E) 0 1 (E)),1,1)",
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    },
    {
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      "strategy": "Correct",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:50.939421779+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000438s",
      "counterexample": "((T (E) 2 0 (E)),(T (E) -1 2 (E)),2,-2)",
      "hash": "01dbac718b6071a735e1bc855199a1a95099f4bc"
    },
    {
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      "strategy": "Correct",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:50.942684822+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.000411s",
      "counterexample": "((T (T (E) -3 0 (E)) -2 0 (T (E) -1 1 (E))),(T (E) -1 1 (T (E) 0 2 (E))),0,1)",
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    },
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      "strategy": "Correct",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 7,
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      "timestamp": "2026-04-30T18:09:50.945957516+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000391s",
      "counterexample": "((T (E) 0 1 (E)),(T (E) 1 -1 (E)),-2,1)",
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    },
    {
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      "strategy": "Correct",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 8,
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      "timestamp": "2026-04-30T18:09:50.949230460+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000398s",
      "counterexample": "((E),(T (E) 1 -1 (E)),2,1)",
      "hash": "01dbac718b6071a735e1bc855199a1a95099f4bc"
    },
    {
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      "strategy": "Correct",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:50.952473580+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 0,
      "time": "0.000431s",
      "counterexample": "((T (E) 1 -1 (E)),(T (E) 1 -1 (E)),0,1)",
      "hash": "01dbac718b6071a735e1bc855199a1a95099f4bc"
    },
    {
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      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:50.957816614+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000427s",
      "counterexample": "((T (E) 0 0 (E)),(T (E) 0 0 (E)),-1,1)",
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    },
    {
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      "strategy": "Quick",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 1,
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      "timestamp": "2026-04-30T18:09:50.961071973+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 0,
      "time": "0.000405s",
      "counterexample": "((T (E) 0 0 (E)),(E),1,-1)",
      "hash": "01dbac718b6071a735e1bc855199a1a95099f4bc"
    },
    {
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      "strategy": "Quick",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:50.964462209+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000447s",
      "counterexample": "((T (E) 0 0 (E)),(T (E) 0 0 (E)),-2,1)",
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    },
    {
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      "strategy": "Quick",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:50.967753636+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000409s",
      "counterexample": "((T (E) 0 0 (E)),(T (E) 0 0 (E)),-2,-1)",
      "hash": "01dbac718b6071a735e1bc855199a1a95099f4bc"
    },
    {
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      "strategy": "Quick",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:50.971102204+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 0,
      "time": "0.000403s",
      "counterexample": "((T (E) 0 0 (E)),(E),-1,0)",
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    },
    {
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      "strategy": "Quick",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:50.974405360+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000483s",
      "counterexample": "((T (E) 0 0 (E)),(T (E) 0 0 (E)),-2,1)",
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    },
    {
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      "strategy": "Quick",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:50.977753680+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000415s",
      "counterexample": "((T (E) 0 0 (E)),(E),1,-2)",
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    },
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      "strategy": "Quick",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:50.981118913+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.000464s",
      "counterexample": "((T (E) 0 0 (E)),(T (E) 0 0 (E)),2,2)",
      "hash": "01dbac718b6071a735e1bc855199a1a95099f4bc"
    },
    {
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      "strategy": "Quick",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:50.984465065+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 0,
      "time": "0.000493s",
      "counterexample": "((T (E) 0 0 (E)),(E),-1,0)",
      "hash": "01dbac718b6071a735e1bc855199a1a95099f4bc"
    },
    {
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      "strategy": "Quick",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:50.987840311+00:00",
      "status": "Failed",
      "tests": 10,
      "discards": 2,
      "time": "0.000487s",
      "counterexample": "((T (T (E) 0 0 (E)) 1 1 (E)),(T (E) 0 -2 (E)),-4,2)",
      "hash": "01dbac718b6071a735e1bc855199a1a95099f4bc"
    },
    {
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      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:50.993474865+00:00",
      "status": "Failed",
      "tests": 6,
      "discards": 0,
      "time": "0.001452s",
      "counterexample": "((T (E) -986 -976 (E)),(E),-917,-943)",
      "hash": "01dbac718b6071a735e1bc855199a1a95099f4bc"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:50.997801374+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.000937s",
      "counterexample": "((T (E) -980 -987 (E)),(E),-976,-976)",
      "hash": "01dbac718b6071a735e1bc855199a1a95099f4bc"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.001634213+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.001106s",
      "counterexample": "((T (E) -985 -992 (E)),(T (E) -989 -991 (E)),-960,-984)",
      "hash": "01dbac718b6071a735e1bc855199a1a95099f4bc"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.005767399+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.000953s",
      "counterexample": "((T (E) -991 -992 (E)),(E),-977,-991)",
      "hash": "01dbac718b6071a735e1bc855199a1a95099f4bc"
    },
    {
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      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.009546246+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.001067s",
      "counterexample": "((T (E) -987 -999 (E)),(E),-990,-964)",
      "hash": "01dbac718b6071a735e1bc855199a1a95099f4bc"
    },
    {
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      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.013511153+00:00",
      "status": "Failed",
      "tests": 8,
      "discards": 9,
      "time": "0.003014s",
      "counterexample": "((T (T (E) -990 -963 (E)) -976 -927 (E)),(E),-895,-756)",
      "hash": "01dbac718b6071a735e1bc855199a1a95099f4bc"
    },
    {
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      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.019663508+00:00",
      "status": "Failed",
      "tests": 9,
      "discards": 4,
      "time": "0.002195s",
      "counterexample": "((T (E) -934 -925 (E)),(T (E) -931 -878 (E)),-874,-907)",
      "hash": "01dbac718b6071a735e1bc855199a1a95099f4bc"
    },
    {
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      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.024855875+00:00",
      "status": "Failed",
      "tests": 10,
      "discards": 12,
      "time": "0.003049s",
      "counterexample": "((T (T (E) -987 -889 (E)) -896 -893 (E)),(E),-901,-970)",
      "hash": "01dbac718b6071a735e1bc855199a1a95099f4bc"
    },
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      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.031112356+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.000951s",
      "counterexample": "((T (E) -981 -987 (E)),(E),-964,-983)",
      "hash": "01dbac718b6071a735e1bc855199a1a95099f4bc"
    },
    {
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      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.034970537+00:00",
      "status": "Failed",
      "tests": 6,
      "discards": 0,
      "time": "0.001524s",
      "counterexample": "((T (T (E) -977 -963 (E)) -975 -948 (E)),(T (T (T (E) -1000 -980 (E)) -981 -979 (E)) -949 -958 (E)),-978,-960)",
      "hash": "01dbac718b6071a735e1bc855199a1a95099f4bc"
    },
    {
      "experiment": "ci-run",
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      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.041756961+00:00",
      "status": "Failed",
      "tests": 6,
      "discards": 24,
      "time": "0.002430s",
      "counterexample": "((T (E) 541 -38 (E)),(E),-568,113)",
      "hash": "01dbac718b6071a735e1bc855199a1a95099f4bc"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.047287180+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 4,
      "time": "0.000503s",
      "counterexample": "((T (E) -460 565 (T (E) 47 679 (E))),(E),-317,949)",
      "hash": "01dbac718b6071a735e1bc855199a1a95099f4bc"
    },
    {
      "experiment": "ci-run",
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      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.050730201+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 13,
      "time": "0.001156s",
      "counterexample": "((T (E) -39 344 (E)),(E),-241,-252)",
      "hash": "01dbac718b6071a735e1bc855199a1a95099f4bc"
    },
    {
      "experiment": "ci-run",
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      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.054934523+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 34,
      "time": "0.002551s",
      "counterexample": "((T (E) -87 452 (E)),(T (E) 91 226 (E)),769,96)",
      "hash": "01dbac718b6071a735e1bc855199a1a95099f4bc"
    },
    {
      "experiment": "ci-run",
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      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.060737627+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 11,
      "time": "0.001124s",
      "counterexample": "((T (E) -453 444 (E)),(E),94,-842)",
      "hash": "01dbac718b6071a735e1bc855199a1a95099f4bc"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.064837393+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 18,
      "time": "0.001756s",
      "counterexample": "((T (E) 125 210 (E)),(E),260,-23)",
      "hash": "01dbac718b6071a735e1bc855199a1a95099f4bc"
    },
    {
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      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.069754947+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 28,
      "time": "0.002400s",
      "counterexample": "((T (E) 248 162 (T (E) 371 5 (E))),(E),-256,-642)",
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    },
    {
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      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.075326372+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 7,
      "time": "0.000873s",
      "counterexample": "((T (E) 408 -130 (E)),(E),538,-72)",
      "hash": "01dbac718b6071a735e1bc855199a1a95099f4bc"
    },
    {
      "experiment": "ci-run",
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      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.079245424+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 3,
      "time": "0.000507s",
      "counterexample": "((T (E) 0 172 (T (E) 332 -21 (E))),(E),-59,-258)",
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    },
    {
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      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.082777627+00:00",
      "status": "Failed",
      "tests": 7,
      "discards": 49,
      "time": "0.003693s",
      "counterexample": "((T (E) -698 -33 (E)),(E),22,-523)",
      "hash": "01dbac718b6071a735e1bc855199a1a95099f4bc"
    },
    {
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      "strategy": "Small",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.092107310+00:00",
      "status": "Failed",
      "tests": 31,
      "discards": 0,
      "time": "0.000672s",
      "counterexample": "((T (E) 0 0 (E)),(E),1,0)",
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    },
    {
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      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.095939448+00:00",
      "status": "Failed",
      "tests": 31,
      "discards": 0,
      "time": "0.000599s",
      "counterexample": "((T (E) 0 0 (E)),(E),1,0)",
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    },
    {
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      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.099470350+00:00",
      "status": "Failed",
      "tests": 31,
      "discards": 0,
      "time": "0.000642s",
      "counterexample": "((T (E) 0 0 (E)),(E),1,0)",
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    },
    {
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      "strategy": "Small",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.102940414+00:00",
      "status": "Failed",
      "tests": 31,
      "discards": 0,
      "time": "0.000596s",
      "counterexample": "((T (E) 0 0 (E)),(E),1,0)",
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    },
    {
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      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.106621485+00:00",
      "status": "Failed",
      "tests": 31,
      "discards": 0,
      "time": "0.000606s",
      "counterexample": "((T (E) 0 0 (E)),(E),1,0)",
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    },
    {
      "experiment": "ci-run",
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      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.110216661+00:00",
      "status": "Failed",
      "tests": 31,
      "discards": 0,
      "time": "0.000625s",
      "counterexample": "((T (E) 0 0 (E)),(E),1,0)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.113747531+00:00",
      "status": "Failed",
      "tests": 31,
      "discards": 0,
      "time": "0.000579s",
      "counterexample": "((T (E) 0 0 (E)),(E),1,0)",
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    },
    {
      "experiment": "ci-run",
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      "language": "Haskell",
      "strategy": "Small",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.117295819+00:00",
      "status": "Failed",
      "tests": 31,
      "discards": 0,
      "time": "0.000642s",
      "counterexample": "((T (E) 0 0 (E)),(E),1,0)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.120872494+00:00",
      "status": "Failed",
      "tests": 31,
      "discards": 0,
      "time": "0.000592s",
      "counterexample": "((T (E) 0 0 (E)),(E),1,0)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.124544404+00:00",
      "status": "Failed",
      "tests": 31,
      "discards": 0,
      "time": "0.000639s",
      "counterexample": "((T (E) 0 0 (E)),(E),1,0)",
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    },
    {
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      "language": "Haskell",
      "strategy": "SmallRev",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.130457569+00:00",
      "status": "Failed",
      "tests": 11,
      "discards": 20,
      "time": "0.000986s",
      "counterexample": "(1,0,(T (E) 0 0 (E)),(E))",
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    },
    {
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      "strategy": "SmallRev",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.134628857+00:00",
      "status": "Failed",
      "tests": 11,
      "discards": 20,
      "time": "0.000930s",
      "counterexample": "(1,0,(T (E) 0 0 (E)),(E))",
      "hash": "01dbac718b6071a735e1bc855199a1a95099f4bc"
    },
    {
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      "strategy": "SmallRev",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.138553552+00:00",
      "status": "Failed",
      "tests": 11,
      "discards": 20,
      "time": "0.000980s",
      "counterexample": "(1,0,(T (E) 0 0 (E)),(E))",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "SmallRev",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.142439884+00:00",
      "status": "Failed",
      "tests": 11,
      "discards": 20,
      "time": "0.000939s",
      "counterexample": "(1,0,(T (E) 0 0 (E)),(E))",
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    },
    {
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      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.146212346+00:00",
      "status": "Failed",
      "tests": 11,
      "discards": 20,
      "time": "0.000973s",
      "counterexample": "(1,0,(T (E) 0 0 (E)),(E))",
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    },
    {
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      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.150177045+00:00",
      "status": "Failed",
      "tests": 11,
      "discards": 20,
      "time": "0.001259s",
      "counterexample": "(1,0,(T (E) 0 0 (E)),(E))",
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    },
    {
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      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.154794481+00:00",
      "status": "Failed",
      "tests": 11,
      "discards": 20,
      "time": "0.000978s",
      "counterexample": "(1,0,(T (E) 0 0 (E)),(E))",
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    },
    {
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      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.158742298+00:00",
      "status": "Failed",
      "tests": 11,
      "discards": 20,
      "time": "0.000925s",
      "counterexample": "(1,0,(T (E) 0 0 (E)),(E))",
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    },
    {
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      "property": "prop_UnionDeleteInsert",
      "mutations": [
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      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.162594680+00:00",
      "status": "Failed",
      "tests": 11,
      "discards": 20,
      "time": "0.000987s",
      "counterexample": "(1,0,(T (E) 0 0 (E)),(E))",
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    },
    {
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      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.166472508+00:00",
      "status": "Failed",
      "tests": 11,
      "discards": 20,
      "time": "0.000954s",
      "counterexample": "(1,0,(T (E) 0 0 (E)),(E))",
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    },
    {
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      "property": "prop_UnionDeleteInsert",
      "mutations": [
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      "mode": "solve",
      "trial": 0,
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      "timestamp": "2026-04-30T18:09:51.173265146+00:00",
      "status": "Failed",
      "tests": 15,
      "discards": null,
      "time": "0.000449s",
      "counterexample": "((T (E) 0 0 (E)),(E),1,0)",
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      "property": "prop_UnionDeleteInsert",
      "mutations": [
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      "mode": "solve",
      "trial": 1,
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      "timestamp": "2026-04-30T18:09:51.176926862+00:00",
      "status": "Failed",
      "tests": 15,
      "discards": null,
      "time": "0.000404s",
      "counterexample": "((T (E) 0 0 (E)),(E),1,0)",
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    {
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      "property": "prop_UnionDeleteInsert",
      "mutations": [
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      "mode": "solve",
      "trial": 2,
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      "timestamp": "2026-04-30T18:09:51.180637674+00:00",
      "status": "Failed",
      "tests": 15,
      "discards": null,
      "time": "0.000365s",
      "counterexample": "((T (E) 0 0 (E)),(E),1,0)",
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    {
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      "strategy": "Lean",
      "property": "prop_UnionDeleteInsert",
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      "mode": "solve",
      "trial": 3,
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      "timestamp": "2026-04-30T18:09:51.184218060+00:00",
      "status": "Failed",
      "tests": 15,
      "discards": null,
      "time": "0.000423s",
      "counterexample": "((T (E) 0 0 (E)),(E),1,0)",
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    {
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      "property": "prop_UnionDeleteInsert",
      "mutations": [
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      "mode": "solve",
      "trial": 4,
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      "timestamp": "2026-04-30T18:09:51.187850896+00:00",
      "status": "Failed",
      "tests": 15,
      "discards": null,
      "time": "0.000378s",
      "counterexample": "((T (E) 0 0 (E)),(E),1,0)",
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    {
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      "property": "prop_UnionDeleteInsert",
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      "mode": "solve",
      "trial": 5,
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      "timestamp": "2026-04-30T18:09:51.191347101+00:00",
      "status": "Failed",
      "tests": 15,
      "discards": null,
      "time": "0.000417s",
      "counterexample": "((T (E) 0 0 (E)),(E),1,0)",
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    {
      "experiment": "ci-run",
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      "property": "prop_UnionDeleteInsert",
      "mutations": [
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      "mode": "solve",
      "trial": 6,
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      "timestamp": "2026-04-30T18:09:51.194922820+00:00",
      "status": "Failed",
      "tests": 15,
      "discards": null,
      "time": "0.000358s",
      "counterexample": "((T (E) 0 0 (E)),(E),1,0)",
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    {
      "experiment": "ci-run",
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      "strategy": "Lean",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.198324140+00:00",
      "status": "Failed",
      "tests": 15,
      "discards": null,
      "time": "0.000417s",
      "counterexample": "((T (E) 0 0 (E)),(E),1,0)",
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    {
      "experiment": "ci-run",
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      "strategy": "Lean",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:09:51.201821830+00:00",
      "status": "Failed",
      "tests": 15,
      "discards": null,
      "time": "0.000371s",
      "counterexample": "((T (E) 0 0 (E)),(E),1,0)",
      "hash": "01dbac718b6071a735e1bc855199a1a95099f4bc"
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    {
      "experiment": "ci-run",
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      "strategy": "Lean",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_1"
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      "mode": "solve",
      "trial": 9,
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      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:10:00.890499944+00:00",
      "status": "Failed",
      "tests": 102,
      "discards": 67,
      "time": "0.001037s",
      "counterexample": "((T (E) 0 0 (E)),2,0,2)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Quick",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:10:00.894308801+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 0,
      "time": "0.000431s",
      "counterexample": "((T (E) 0 0 (E)),1,1,-1)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "property": "prop_InsertPost",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:10:00.897566704+00:00",
      "status": "Failed",
      "tests": 37,
      "discards": 13,
      "time": "0.000620s",
      "counterexample": "((T (E) -9 -2 (E)),28,28,-14)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "property": "prop_InsertPost",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:10:00.900915080+00:00",
      "status": "Failed",
      "tests": 506,
      "discards": 202,
      "time": "0.002977s",
      "counterexample": "((T (E) 1 0 (E)),2,2,-1)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "property": "prop_InsertPost",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:10:00.906948508+00:00",
      "status": "Failed",
      "tests": 124,
      "discards": 46,
      "time": "0.001048s",
      "counterexample": "((T (E) 0 -5 (E)),1,0,4)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Quick",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:10:00.911019901+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000393s",
      "counterexample": "((T (E) 0 0 (E)),2,2,-2)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Quick",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:10:00.914123018+00:00",
      "status": "Failed",
      "tests": 401,
      "discards": 185,
      "time": "0.002621s",
      "counterexample": "((T (E) 0 0 (E)),1,1,1)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:10:00.922084814+00:00",
      "status": "Failed",
      "tests": 500,
      "discards": 225,
      "time": "0.036424s",
      "counterexample": "((T (E) -996 -700 (T (T (E) -920 -943 (E)) -871 -960 (E))),-914,-914,-558)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Hedgehog",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:10:00.961782428+00:00",
      "status": "Failed",
      "tests": 11,
      "discards": 2,
      "time": "0.001611s",
      "counterexample": "((T (E) -897 -939 (E)),-789,-897,-993)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Hedgehog",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:10:00.966543665+00:00",
      "status": "Failed",
      "tests": 199,
      "discards": 104,
      "time": "0.019654s",
      "counterexample": "((T (E) -988 -982 (E)),-971,-971,-960)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Hedgehog",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:10:00.989374925+00:00",
      "status": "Failed",
      "tests": 617,
      "discards": 248,
      "time": "0.058606s",
      "counterexample": "((T (E) -812 -529 (E)),-150,-150,-909)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Hedgehog",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:10:01.051533231+00:00",
      "status": "Failed",
      "tests": 1768,
      "discards": 824,
      "time": "0.131339s",
      "counterexample": "((T (E) -335 -32 (E)),817,-335,533)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:10:01.186563818+00:00",
      "status": "Failed",
      "tests": 1271,
      "discards": 633,
      "time": "0.094933s",
      "counterexample": "((T (T (E) -988 -985 (E)) -976 -966 (E)),-957,-957,-973)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:10:01.285224485+00:00",
      "status": "Failed",
      "tests": 1026,
      "discards": 478,
      "time": "0.076309s",
      "counterexample": "((T (T (E) -994 -980 (E)) -981 -991 (E)),-983,-983,-997)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:10:01.365159588+00:00",
      "status": "Failed",
      "tests": 1124,
      "discards": 481,
      "time": "0.108541s",
      "counterexample": "((T (T (E) -996 -992 (E)) -978 -978 (E)),-935,-978,-946)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:10:01.477370762+00:00",
      "status": "Failed",
      "tests": 79,
      "discards": 46,
      "time": "0.010051s",
      "counterexample": "((T (E) -930 -895 (E)),-553,-553,-997)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:10:01.490832385+00:00",
      "status": "Failed",
      "tests": 267,
      "discards": 137,
      "time": "0.030242s",
      "counterexample": "((T (E) -980 -984 (E)),-974,-980,-951)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:10:01.527666921+00:00",
      "status": "Failed",
      "tests": 5716,
      "discards": 12283,
      "time": "0.416292s",
      "counterexample": "((T (E) 180 652 (E)),369,369,-116)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "property": "prop_InsertPost",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:10:01.948610506+00:00",
      "status": "Failed",
      "tests": 2356,
      "discards": 4997,
      "time": "0.166598s",
      "counterexample": "((T (E) -102 -328 (E)),767,767,937)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "property": "prop_InsertPost",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:10:02.119562356+00:00",
      "status": "Failed",
      "tests": 11869,
      "discards": 25472,
      "time": "0.840471s",
      "counterexample": "((T (E) -588 -175 (E)),93,93,180)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "property": "prop_InsertPost",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:10:02.964446834+00:00",
      "status": "Failed",
      "tests": 7190,
      "discards": 15301,
      "time": "0.512649s",
      "counterexample": "((T (E) -129 497 (E)),468,468,613)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:10:03.481689884+00:00",
      "status": "Failed",
      "tests": 5738,
      "discards": 12150,
      "time": "0.403459s",
      "counterexample": "((T (E) -431 807 (E)),465,-431,307)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "property": "prop_InsertPost",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:10:03.889256244+00:00",
      "status": "Failed",
      "tests": 4898,
      "discards": 10555,
      "time": "0.349861s",
      "counterexample": "((T (E) -24 -87 (E)),-11,-11,-287)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "property": "prop_InsertPost",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:10:04.243261381+00:00",
      "status": "Failed",
      "tests": 39,
      "discards": 113,
      "time": "0.006193s",
      "counterexample": "((T (E) -200 459 (E)),98,98,-92)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:10:04.252695631+00:00",
      "status": "Failed",
      "tests": 15,
      "discards": 27,
      "time": "0.002589s",
      "counterexample": "((T (E) -235 498 (E)),647,-235,-148)",
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    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Falsify",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:10:04.258565782+00:00",
      "status": "Failed",
      "tests": 23095,
      "discards": 49832,
      "time": "1.632643s",
      "counterexample": "((T (E) -97 -809 (E)),545,-97,-179)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:10:05.897159766+00:00",
      "status": "Failed",
      "tests": 1134,
      "discards": 2527,
      "time": "0.086261s",
      "counterexample": "((T (E) 0 285 (E)),41,0,504)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Small",
      "property": "InsertPost",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:10:05.989988240+00:00",
      "status": "timed_out",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "language": "Haskell",
      "strategy": "SmallRev",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:11:05.997043889+00:00",
      "status": "Failed",
      "tests": 10,
      "discards": 7,
      "time": "0.000580s",
      "counterexample": "(1,0,0,(T (E) 0 1 (E)))",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "SmallRev",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:11:06.000867348+00:00",
      "status": "Failed",
      "tests": 10,
      "discards": 7,
      "time": "0.000505s",
      "counterexample": "(1,0,0,(T (E) 0 1 (E)))",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "SmallRev",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:11:06.004258512+00:00",
      "status": "Failed",
      "tests": 10,
      "discards": 7,
      "time": "0.000535s",
      "counterexample": "(1,0,0,(T (E) 0 1 (E)))",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "SmallRev",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:11:06.007741002+00:00",
      "status": "Failed",
      "tests": 10,
      "discards": 7,
      "time": "0.000493s",
      "counterexample": "(1,0,0,(T (E) 0 1 (E)))",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "language": "Haskell",
      "strategy": "SmallRev",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:11:06.011169310+00:00",
      "status": "Failed",
      "tests": 10,
      "discards": 7,
      "time": "0.000546s",
      "counterexample": "(1,0,0,(T (E) 0 1 (E)))",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "SmallRev",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:11:06.014624840+00:00",
      "status": "Failed",
      "tests": 10,
      "discards": 7,
      "time": "0.000480s",
      "counterexample": "(1,0,0,(T (E) 0 1 (E)))",
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      "time": "0.001952s",
      "counterexample": "((T (E) -87 -248 (T (T (E) 406 187 (E)) 478 609 (E))),720,-304)",
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      "status": "Failed",
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      "time": "0.002119s",
      "counterexample": "((T (E) -320 -909 (E)),-189,137)",
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      "timestamp": "2026-04-30T18:11:06.277877675+00:00",
      "status": "Failed",
      "tests": 9,
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      "time": "0.001059s",
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    {
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      "time": "0.000609s",
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      "timestamp": "2026-04-30T18:11:06.394631224+00:00",
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      "trial": 5,
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      "timestamp": "2026-04-30T18:11:06.398048667+00:00",
      "status": "Failed",
      "tests": 8,
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      "time": "0.000340s",
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      "time": "0.000426s",
      "counterexample": "((T (E) -1 -1 (E)),0,1)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Quick",
      "property": "prop_InsertDelete",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:11:06.528245160+00:00",
      "status": "Failed",
      "tests": 203,
      "discards": 98,
      "time": "0.001757s",
      "counterexample": "((T (E) 0 0 (E)),2,0,-1)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Quick",
      "property": "prop_InsertDelete",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:11:06.532885179+00:00",
      "status": "Failed",
      "tests": 101,
      "discards": 53,
      "time": "0.001047s",
      "counterexample": "((T (E) 0 0 (E)),1,0,-1)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Quick",
      "property": "prop_InsertDelete",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:11:06.536877737+00:00",
      "status": "Failed",
      "tests": 103,
      "discards": 31,
      "time": "0.000991s",
      "counterexample": "((T (E) 0 0 (E)),1,0,2)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Quick",
      "property": "prop_InsertDelete",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:11:06.540754205+00:00",
      "status": "Failed",
      "tests": 102,
      "discards": 50,
      "time": "0.001021s",
      "counterexample": "((T (E) 0 0 (E)),1,0,0)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Quick",
      "property": "prop_InsertDelete",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:11:06.544735606+00:00",
      "status": "Failed",
      "tests": 102,
      "discards": 35,
      "time": "0.001003s",
      "counterexample": "((T (E) 0 0 (E)),2,0,-2)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Quick",
      "property": "prop_InsertDelete",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:11:06.548517723+00:00",
      "status": "Failed",
      "tests": 217,
      "discards": 101,
      "time": "0.001756s",
      "counterexample": "((T (E) -1 0 (E)),4,-1,10)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Quick",
      "property": "prop_InsertDelete",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:11:06.553406642+00:00",
      "status": "Failed",
      "tests": 207,
      "discards": 86,
      "time": "0.001726s",
      "counterexample": "((T (E) -1 -1 (T (E) 0 0 (E))),0,0,1)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Quick",
      "property": "prop_InsertDelete",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:11:06.558114519+00:00",
      "status": "Failed",
      "tests": 303,
      "discards": 151,
      "time": "0.002272s",
      "counterexample": "((T (E) 0 0 (E)),1,0,-2)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_InsertDelete",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:11:06.563331269+00:00",
      "status": "Failed",
      "tests": 102,
      "discards": 54,
      "time": "0.001050s",
      "counterexample": "((T (E) 0 0 (E)),2,0,2)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_InsertDelete",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:11:06.567266903+00:00",
      "status": "Failed",
      "tests": 264,
      "discards": 124,
      "time": "0.002099s",
      "counterexample": "((T (E) 0 11 (T (E) 2 -2 (E))),19,0,-30)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_InsertDelete",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:11:06.575693974+00:00",
      "status": "Failed",
      "tests": 2690,
      "discards": 1213,
      "time": "0.190469s",
      "counterexample": "((T (E) -994 -999 (E)),-960,-994,-990)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Hedgehog",
      "property": "prop_InsertDelete",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:11:06.769622176+00:00",
      "status": "Failed",
      "tests": 6220,
      "discards": 2983,
      "time": "0.441290s",
      "counterexample": "((T (E) -983 -984 (E)),-971,-983,-973)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Hedgehog",
      "property": "prop_InsertDelete",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:11:07.214768577+00:00",
      "status": "Failed",
      "tests": 206,
      "discards": 133,
      "time": "0.028230s",
      "counterexample": "((T (E) -859 -865 (E)),-323,-859,-589)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Hedgehog",
      "property": "prop_InsertDelete",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:11:07.246604544+00:00",
      "status": "Failed",
      "tests": 184,
      "discards": 89,
      "time": "0.018158s",
      "counterexample": "((T (E) -982 -462 (T (E) -872 -993 (E))),-440,-982,-254)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertDelete",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:11:07.268053701+00:00",
      "status": "Failed",
      "tests": 1681,
      "discards": 828,
      "time": "0.177880s",
      "counterexample": "((T (E) -982 -916 (E)),-874,-982,-935)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertDelete",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:11:07.449572277+00:00",
      "status": "Failed",
      "tests": 15,
      "discards": 5,
      "time": "0.002336s",
      "counterexample": "((T (E) -923 -879 (E)),-899,-923,-980)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertDelete",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:11:07.455270835+00:00",
      "status": "Failed",
      "tests": 4151,
      "discards": 1982,
      "time": "0.406760s",
      "counterexample": "((T (T (E) -916 -860 (E)) -755 -923 (E)),-677,-755,-443)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertDelete",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:11:07.865724720+00:00",
      "status": "Failed",
      "tests": 2465,
      "discards": 1150,
      "time": "0.202411s",
      "counterexample": "((T (E) -955 -999 (E)),-826,-955,-943)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertDelete",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:11:08.072138797+00:00",
      "status": "Failed",
      "tests": 354,
      "discards": 157,
      "time": "0.028239s",
      "counterexample": "((T (E) -914 -919 (E)),-815,-914,-987)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "property": "prop_InsertDelete",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:11:08.103875273+00:00",
      "status": "Failed",
      "tests": 820,
      "discards": 383,
      "time": "0.060967s",
      "counterexample": "((T (E) -995 -995 (E)),-993,-995,-985)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
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    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_InsertDelete",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:11:08.172812212+00:00",
      "status": "Failed",
      "tests": 12892,
      "discards": 27618,
      "time": "0.950685s",
      "counterexample": "((T (T (E) -537 205 (E)) 98 28 (T (E) 344 -531 (E))),-132,-537,67)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "property": "prop_InsertDelete",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:11:09.128072779+00:00",
      "status": "Failed",
      "tests": 8535,
      "discards": 18499,
      "time": "0.629635s",
      "counterexample": "((T (E) -696 24 (E)),-131,-696,286)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "property": "prop_InsertDelete",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:11:09.762102438+00:00",
      "status": "Failed",
      "tests": 10197,
      "discards": 21650,
      "time": "0.744486s",
      "counterexample": "((T (E) -450 312 (E)),330,-450,107)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
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      "strategy": "Falsify",
      "property": "prop_InsertDelete",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:11:10.511287416+00:00",
      "status": "Failed",
      "tests": 2492,
      "discards": 5504,
      "time": "0.191710s",
      "counterexample": "((T (E) 465 -478 (E)),723,465,-5)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
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      "property": "prop_InsertDelete",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:11:10.706692501+00:00",
      "status": "Failed",
      "tests": 7425,
      "discards": 16487,
      "time": "0.560399s",
      "counterexample": "((T (T (E) -384 339 (T (E) -130 967 (E))) 728 -845 (E)),234,-384,-503)",
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    {
      "experiment": "ci-run",
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      "property": "prop_InsertDelete",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:11:11.271275759+00:00",
      "status": "Failed",
      "tests": 19649,
      "discards": 43463,
      "time": "1.486251s",
      "counterexample": "((T (E) -256 5 (E)),536,-256,-492)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_InsertDelete",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:11:12.763420994+00:00",
      "status": "Failed",
      "tests": 16472,
      "discards": 35633,
      "time": "1.218862s",
      "counterexample": "((T (E) -414 -611 (E)),-191,-414,793)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_InsertDelete",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:11:13.986792890+00:00",
      "status": "Failed",
      "tests": 2196,
      "discards": 4672,
      "time": "0.162539s",
      "counterexample": "((T (T (E) -550 -191 (T (E) 183 627 (E))) 205 500 (T (E) 596 -229 (E))),385,205,260)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_InsertDelete",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:11:14.153134544+00:00",
      "status": "Failed",
      "tests": 13350,
      "discards": 29233,
      "time": "0.982821s",
      "counterexample": "((T (E) -493 283 (E)),608,-493,237)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_InsertDelete",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:11:15.140794794+00:00",
      "status": "Failed",
      "tests": 118,
      "discards": 240,
      "time": "0.010972s",
      "counterexample": "((T (E) -544 -418 (E)),-305,-544,938)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Small",
      "property": "InsertDelete",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:11:15.158256217+00:00",
      "status": "timed_out",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "SmallRev",
      "property": "prop_InsertDelete",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:15.163471591+00:00",
      "status": "Failed",
      "tests": 4,
      "discards": 1,
      "time": "0.000315s",
      "counterexample": "(1,0,0,(T (E) 0 0 (E)))",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "SmallRev",
      "property": "prop_InsertDelete",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:15.167010634+00:00",
      "status": "Failed",
      "tests": 4,
      "discards": 1,
      "time": "0.000280s",
      "counterexample": "(1,0,0,(T (E) 0 0 (E)))",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "language": "Haskell",
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      "time": "0.000439s",
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      "property": "prop_InsertDelete",
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      "mode": "solve",
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      "status": "Failed",
      "tests": 0,
      "discards": 0,
      "time": "0.000410s",
      "counterexample": "Exception thrown while showing test case: 'BSTSIZE: getEnv: does not exist (no environment variable)'",
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      "property": "prop_InsertDelete",
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        "insert_2"
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      "mode": "solve",
      "trial": 8,
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      "status": "Failed",
      "tests": 0,
      "discards": 0,
      "time": "0.000391s",
      "counterexample": "Exception thrown while showing test case: 'BSTSIZE: getEnv: does not exist (no environment variable)'",
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      "property": "prop_InsertDelete",
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        "insert_2"
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      "mode": "solve",
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      "status": "Failed",
      "tests": 0,
      "discards": 0,
      "time": "0.000406s",
      "counterexample": "Exception thrown while showing test case: 'BSTSIZE: getEnv: does not exist (no environment variable)'",
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      "property": "prop_InsertDelete",
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        "insert_2"
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      "status": "Failed",
      "tests": 11,
      "discards": 0,
      "time": "0.000512s",
      "counterexample": "((T (T (E) -9 10 (T (E) -6 5 (E))) -3 11 (T (T (E) 0 10 (E)) 4 -4 (T (E) 6 1 (T (E) 9 -9 (E))))),5,-3,-4)",
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        "insert_2"
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      "mode": "solve",
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      "status": "Failed",
      "tests": 5,
      "discards": 0,
      "time": "0.000402s",
      "counterexample": "((T (T (T (E) -2 -4 (E)) 2 -1 (E)) 4 -4 (T (E) 5 -4 (E))),-1,-2,-3)",
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        "insert_2"
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      "mode": "solve",
      "trial": 2,
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      "timestamp": "2026-04-30T18:12:15.316990391+00:00",
      "status": "Failed",
      "tests": 103,
      "discards": 0,
      "time": "0.003525s",
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      "trial": 3,
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      "timestamp": "2026-04-30T18:12:15.323688144+00:00",
      "status": "Failed",
      "tests": 174,
      "discards": 0,
      "time": "0.003866s",
      "counterexample": "((T (T (E) -73 50 (T (T (E) -67 -15 (T (T (E) -49 -9 (E)) -40 -62 (E))) -39 11 (T (T (T (T (E) -37 -32 (E)) -36 25 (T (E) -35 -24 (E))) -32 -24 (T (T (T (E) -30 -10 (T (E) -29 -3 (E))) -28 16 (T (T (E) -23 -28 (E)) -21 0 (E))) -13 -44 (T (T (E) -11 71 (T (E) -4 63 (T (T (E) 0 48 (E)) 1 45 (E)))) 4 -47 (T (T (E) 15 -9 (E)) 16 54 (T (T (E) 22 26 (E)) 23 -48 (T (E) 29 -34 (T (E) 30 22 (E)))))))) 32 30 (E)))) 34 -7 (T (T (E) 36 35 (T (T (E) 38 -25 (E)) 40 50 (E))) 51 -44 (T (T (E) 53 -65 (E)) 54 -18 (T (E) 68 27 (E))))),-65,-73,65)",
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        "insert_2"
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      "mode": "solve",
      "trial": 4,
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      "timestamp": "2026-04-30T18:12:15.330671062+00:00",
      "status": "Failed",
      "tests": 13,
      "discards": 0,
      "time": "0.000577s",
      "counterexample": "((T (T (T (T (E) -12 1 (E)) -10 -7 (E)) -9 0 (T (T (E) -6 -5 (E)) -4 -7 (E))) -3 -6 (T (T (E) -1 -6 (E)) 1 12 (T (E) 5 -10 (T (E) 12 -8 (E))))),2,-3,13)",
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      "property": "prop_InsertDelete",
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        "insert_2"
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      "mode": "solve",
      "trial": 5,
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      "timestamp": "2026-04-30T18:12:15.334078552+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.000399s",
      "counterexample": "((T (E) -1 0 (T (E) 0 3 (T (E) 1 1 (E)))),0,0,-3)",
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      "property": "prop_InsertDelete",
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        "insert_2"
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      "mode": "solve",
      "trial": 6,
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      "timestamp": "2026-04-30T18:12:15.337289901+00:00",
      "status": "Failed",
      "tests": 131,
      "discards": 0,
      "time": "0.003457s",
      "counterexample": "((T (T (T (E) -30 -13 (T (E) -22 10 (T (E) -17 -20 (E)))) -14 14 (T (E) -9 -14 (E))) -4 11 (T (T (E) -3 -5 (T (E) -1 8 (E))) 2 -10 (T (T (T (T (E) 3 -31 (T (E) 4 -18 (E))) 6 -15 (E)) 10 -19 (T (T (E) 18 -15 (E)) 19 0 (E))) 31 12 (E)))),-7,-14,-19)",
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      "property": "prop_InsertDelete",
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        "insert_2"
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      "mode": "solve",
      "trial": 7,
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      "timestamp": "2026-04-30T18:12:15.343701494+00:00",
      "status": "Failed",
      "tests": 204,
      "discards": 0,
      "time": "0.004141s",
      "counterexample": "((T (T (E) -2 1 (E)) 0 -1 (T (E) 4 -4 (E))),2,0,4)",
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      "property": "prop_InsertDelete",
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        "insert_2"
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      "mode": "solve",
      "trial": 8,
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      "timestamp": "2026-04-30T18:12:15.350976296+00:00",
      "status": "Failed",
      "tests": 37,
      "discards": 0,
      "time": "0.000967s",
      "counterexample": "((T (E) -33 -19 (T (T (T (T (E) -29 -32 (E)) -26 -13 (E)) -25 35 (T (T (E) -23 20 (E)) -16 29 (T (E) -10 -17 (E)))) -3 -21 (T (T (T (T (E) -2 25 (E)) 2 -24 (T (E) 8 1 (E))) 11 33 (T (T (E) 12 -18 (E)) 13 14 (E))) 14 -13 (T (T (T (E) 16 4 (T (T (E) 18 29 (T (E) 19 4 (E))) 21 16 (T (E) 22 31 (T (T (E) 27 26 (E)) 29 -25 (E))))) 32 16 (E)) 35 -1 (E))))),32,32,-7)",
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      "status": "Failed",
      "tests": 65,
      "discards": 0,
      "time": "0.001630s",
      "counterexample": "((T (T (T (T (T (E) -65 62 (E)) -36 47 (T (E) -35 38 (T (E) -28 37 (T (E) -23 -45 (E))))) -22 65 (T (T (E) -1 -30 (E)) 0 22 (E))) 15 35 (T (T (E) 17 -30 (E)) 26 13 (E))) 27 -21 (T (T (E) 32 -22 (T (E) 35 6 (E))) 48 1 (T (E) 54 -47 (T (E) 64 6 (T (E) 65 -7 (E)))))),0,-22,63)",
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      "property": "prop_DeleteInsert",
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        "insert_2"
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      "trial": 0,
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      "timestamp": "2026-04-30T18:12:15.363273547+00:00",
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      "time": "0.000823s",
      "counterexample": "((T (E) -9 -1 (E)),-9,12,25)",
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      "mode": "solve",
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      "time": "0.001045s",
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      "mode": "solve",
      "trial": 2,
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      "tests": 50,
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      "mode": "solve",
      "trial": 3,
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      "timestamp": "2026-04-30T18:12:15.374502107+00:00",
      "status": "Failed",
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      "status": "Failed",
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      "time": "0.000514s",
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      "trial": 5,
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      "timestamp": "2026-04-30T18:12:15.381785036+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000390s",
      "counterexample": "((T (E) 0 0 (E)),1,1,-1)",
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      "trial": 6,
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      "timestamp": "2026-04-30T18:12:15.384990929+00:00",
      "status": "Failed",
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      "discards": 124,
      "time": "0.002008s",
      "counterexample": "((T (E) -9 6 (E)),-9,4,-24)",
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      "timestamp": "2026-04-30T18:12:15.389990189+00:00",
      "status": "Failed",
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      "discards": 0,
      "time": "0.000448s",
      "counterexample": "((T (E) 1 -2 (E)),1,9,1)",
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      "time": "0.001187s",
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      "status": "Failed",
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      "time": "0.140901s",
      "counterexample": "((T (E) -986 -993 (E)),-986,-978,-996)",
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      "status": "Failed",
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      "discards": 563,
      "time": "0.087838s",
      "counterexample": "((T (E) -510 -518 (E)),-510,-290,-997)",
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      "timestamp": "2026-04-30T18:12:15.640047122+00:00",
      "status": "Failed",
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      "discards": 204,
      "time": "0.043826s",
      "counterexample": "((T (E) -999 -975 (T (T (E) -994 -984 (E)) -961 -990 (E))),-999,-942,-954)",
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      "experiment": "ci-run",
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      "mode": "solve",
      "trial": 3,
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      "timestamp": "2026-04-30T18:12:15.687463356+00:00",
      "status": "Failed",
      "tests": 148,
      "discards": 56,
      "time": "0.016498s",
      "counterexample": "((T (E) -998 -982 (E)),-998,-942,-966)",
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      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:15.707202437+00:00",
      "status": "Failed",
      "tests": 347,
      "discards": 158,
      "time": "0.038229s",
      "counterexample": "((T (T (E) -999 -993 (E)) -972 -994 (E)),-978,-978,-986)",
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      "experiment": "ci-run",
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      "property": "prop_DeleteInsert",
      "mutations": [
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      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:15.748784832+00:00",
      "status": "Failed",
      "tests": 8,
      "discards": 3,
      "time": "0.001684s",
      "counterexample": "((T (E) -972 -906 (E)),-910,-910,-886)",
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      "strategy": "Hedgehog",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:15.753470004+00:00",
      "status": "Failed",
      "tests": 211,
      "discards": 93,
      "time": "0.022443s",
      "counterexample": "((T (T (E) -989 -997 (E)) -962 -978 (E)),-953,-953,-971)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Hedgehog",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:15.779306328+00:00",
      "status": "Failed",
      "tests": 1729,
      "discards": 779,
      "time": "0.169848s",
      "counterexample": "((T (T (T (E) -989 -995 (E)) -988 -992 (T (E) -984 -982 (E))) -949 -980 (E)),-941,-941,-886)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:15.952895720+00:00",
      "status": "Failed",
      "tests": 663,
      "discards": 308,
      "time": "0.049210s",
      "counterexample": "((T (T (E) -703 -643 (E)) -547 -921 (T (E) -495 -670 (E))),-703,-661,377)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:16.005676862+00:00",
      "status": "Failed",
      "tests": 762,
      "discards": 369,
      "time": "0.081300s",
      "counterexample": "((T (E) -764 -733 (E)),-544,-544,-491)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:16.095083962+00:00",
      "status": "Failed",
      "tests": 8436,
      "discards": 18283,
      "time": "0.626127s",
      "counterexample": "((T (E) -549 -646 (E)),-500,-500,60)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Falsify",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:16.725519413+00:00",
      "status": "Failed",
      "tests": 1753,
      "discards": 3731,
      "time": "0.133632s",
      "counterexample": "((T (T (E) 0 -123 (E)) 174 591 (E)),174,804,331)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
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      "strategy": "Falsify",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:16.862524918+00:00",
      "status": "Failed",
      "tests": 4525,
      "discards": 9542,
      "time": "0.329001s",
      "counterexample": "((T (T (E) -529 -658 (E)) -482 344 (T (E) 283 159 (E))),-64,-64,314)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:17.195225966+00:00",
      "status": "Failed",
      "tests": 1560,
      "discards": 3296,
      "time": "0.113697s",
      "counterexample": "((T (T (T (T (E) -641 -214 (E)) -426 -356 (E)) 114 -502 (E)) 259 -37 (E)),-370,-370,-387)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:17.312815803+00:00",
      "status": "Failed",
      "tests": 423,
      "discards": 857,
      "time": "0.032521s",
      "counterexample": "((T (E) -771 547 (T (E) -189 236 (E))),253,253,172)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:17.349023289+00:00",
      "status": "Failed",
      "tests": 46,
      "discards": 76,
      "time": "0.005344s",
      "counterexample": "((T (E) -414 -345 (E)),-414,-46,538)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:17.357595109+00:00",
      "status": "Failed",
      "tests": 3298,
      "discards": 7346,
      "time": "0.251376s",
      "counterexample": "((T (T (E) -41 507 (E)) 11 -263 (E)),424,424,212)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:17.612439591+00:00",
      "status": "Failed",
      "tests": 1626,
      "discards": 3418,
      "time": "0.118935s",
      "counterexample": "((T (T (E) -787 31 (E)) 528 -460 (E)),236,236,234)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:17.734740192+00:00",
      "status": "Failed",
      "tests": 1387,
      "discards": 2895,
      "time": "0.100864s",
      "counterexample": "((T (E) -829 -471 (E)),428,428,205)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:17.839124383+00:00",
      "status": "Failed",
      "tests": 1292,
      "discards": 2691,
      "time": "0.093790s",
      "counterexample": "((T (E) -413 -342 (E)),435,435,-810)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Small",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:17.939643705+00:00",
      "status": "Failed",
      "tests": 31,
      "discards": 0,
      "time": "0.000611s",
      "counterexample": "((T (E) 0 0 (E)),0,1,0)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:17.943292766+00:00",
      "status": "Failed",
      "tests": 31,
      "discards": 0,
      "time": "0.000620s",
      "counterexample": "((T (E) 0 0 (E)),0,1,0)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:17.946859802+00:00",
      "status": "Failed",
      "tests": 31,
      "discards": 0,
      "time": "0.000594s",
      "counterexample": "((T (E) 0 0 (E)),0,1,0)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:17.950378354+00:00",
      "status": "Failed",
      "tests": 31,
      "discards": 0,
      "time": "0.000593s",
      "counterexample": "((T (E) 0 0 (E)),0,1,0)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:17.953786352+00:00",
      "status": "Failed",
      "tests": 31,
      "discards": 0,
      "time": "0.000563s",
      "counterexample": "((T (E) 0 0 (E)),0,1,0)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:17.957410545+00:00",
      "status": "Failed",
      "tests": 31,
      "discards": 0,
      "time": "0.000600s",
      "counterexample": "((T (E) 0 0 (E)),0,1,0)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:17.960890347+00:00",
      "status": "Failed",
      "tests": 31,
      "discards": 0,
      "time": "0.000578s",
      "counterexample": "((T (E) 0 0 (E)),0,1,0)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:17.964457558+00:00",
      "status": "Failed",
      "tests": 31,
      "discards": 0,
      "time": "0.000636s",
      "counterexample": "((T (E) 0 0 (E)),0,1,0)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:17.967948612+00:00",
      "status": "Failed",
      "tests": 31,
      "discards": 0,
      "time": "0.000572s",
      "counterexample": "((T (E) 0 0 (E)),0,1,0)",
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    },
    {
      "experiment": "ci-run",
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      "language": "Haskell",
      "strategy": "Small",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:17.971478530+00:00",
      "status": "Failed",
      "tests": 31,
      "discards": 0,
      "time": "0.000638s",
      "counterexample": "((T (E) 0 0 (E)),0,1,0)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "SmallRev",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:17.978586933+00:00",
      "status": "Failed",
      "tests": 11,
      "discards": 12,
      "time": "0.000721s",
      "counterexample": "(0,1,0,(T (E) 0 0 (E)))",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "SmallRev",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:17.982085488+00:00",
      "status": "Failed",
      "tests": 11,
      "discards": 12,
      "time": "0.000712s",
      "counterexample": "(0,1,0,(T (E) 0 0 (E)))",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "SmallRev",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:17.985487145+00:00",
      "status": "Failed",
      "tests": 11,
      "discards": 12,
      "time": "0.000720s",
      "counterexample": "(0,1,0,(T (E) 0 0 (E)))",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "SmallRev",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:17.988985344+00:00",
      "status": "Failed",
      "tests": 11,
      "discards": 12,
      "time": "0.000647s",
      "counterexample": "(0,1,0,(T (E) 0 0 (E)))",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "language": "Haskell",
      "strategy": "SmallRev",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:17.992468210+00:00",
      "status": "Failed",
      "tests": 11,
      "discards": 12,
      "time": "0.000683s",
      "counterexample": "(0,1,0,(T (E) 0 0 (E)))",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "SmallRev",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:17.995901007+00:00",
      "status": "Failed",
      "tests": 11,
      "discards": 12,
      "time": "0.000686s",
      "counterexample": "(0,1,0,(T (E) 0 0 (E)))",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "SmallRev",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:17.999420682+00:00",
      "status": "Failed",
      "tests": 11,
      "discards": 12,
      "time": "0.000687s",
      "counterexample": "(0,1,0,(T (E) 0 0 (E)))",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "SmallRev",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.002930961+00:00",
      "status": "Failed",
      "tests": 11,
      "discards": 12,
      "time": "0.000704s",
      "counterexample": "(0,1,0,(T (E) 0 0 (E)))",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "SmallRev",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.006605888+00:00",
      "status": "Failed",
      "tests": 11,
      "discards": 12,
      "time": "0.000692s",
      "counterexample": "(0,1,0,(T (E) 0 0 (E)))",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "SmallRev",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
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      "time": "0.000349s",
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      "time": "0.000389s",
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      "time": "0.000358s",
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      "time": "0.000424s",
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      "time": "0.000362s",
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      "timestamp": "2026-04-30T18:12:18.080499051+00:00",
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      "timestamp": "2026-04-30T18:12:18.087382987+00:00",
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      "time": "0.000400s",
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      "discards": 0,
      "time": "0.000470s",
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      "time": "0.000405s",
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      "timestamp": "2026-04-30T18:12:18.130420822+00:00",
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      "timestamp": "2026-04-30T18:12:18.133795556+00:00",
      "status": "Failed",
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      "time": "0.000422s",
      "counterexample": "((T (E) -6 6 (T (E) -2 -3 (E))),-6,0,0)",
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      "trial": 2,
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      "timestamp": "2026-04-30T18:12:18.137017830+00:00",
      "status": "Failed",
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      "discards": 0,
      "time": "0.000370s",
      "counterexample": "((T (E) -1 -1 (T (E) 2 -1 (E))),1,1,2)",
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      "strategy": "Correct",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.140168405+00:00",
      "status": "Failed",
      "tests": 7,
      "discards": 0,
      "time": "0.000423s",
      "counterexample": "((T (E) -5 1 (T (T (E) -3 -4 (T (E) 0 5 (E))) 1 2 (E))),5,5,-7)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Correct",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.143328442+00:00",
      "status": "Failed",
      "tests": 101,
      "discards": 0,
      "time": "0.003421s",
      "counterexample": "((T (E) -1 -1 (E)),-1,1,1)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Correct",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.149760218+00:00",
      "status": "Failed",
      "tests": 10,
      "discards": 0,
      "time": "0.000457s",
      "counterexample": "((T (T (T (E) -6 2 (E)) -3 7 (T (E) 2 -9 (T (E) 5 8 (E)))) 9 3 (E)),-6,-5,-6)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Correct",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.152943309+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.000395s",
      "counterexample": "((T (T (E) -2 -3 (E)) 2 -1 (T (E) 3 -3 (E))),-2,-1,-2)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Correct",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.156086480+00:00",
      "status": "Failed",
      "tests": 6,
      "discards": 0,
      "time": "0.000392s",
      "counterexample": "((T (E) -1 -5 (T (E) 1 1 (E))),5,5,-6)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Correct",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.159227039+00:00",
      "status": "Failed",
      "tests": 27,
      "discards": 0,
      "time": "0.000678s",
      "counterexample": "((T (T (E) 17 24 (E)) 20 -12 (E)),26,26,-5)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Correct",
      "property": "prop_DeleteInsert",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.162742811+00:00",
      "status": "Failed",
      "tests": 213,
      "discards": 0,
      "time": "0.004261s",
      "counterexample": "((T (T (E) -11 -9 (T (E) -2 13 (E))) 1 -13 (T (E) 4 -11 (T (T (E) 9 -3 (E)) 13 -6 (E)))),-11,-9,-11)",
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    },
    {
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      "strategy": "Quick",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.173545965+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000433s",
      "counterexample": "((E),0,1,-2,1)",
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    },
    {
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      "property": "prop_InsertInsert",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.176709760+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000383s",
      "counterexample": "((E),-1,2,-2,-2)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Quick",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.179827116+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 0,
      "time": "0.000383s",
      "counterexample": "((E),1,0,-1,-1)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Quick",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.183014409+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 0,
      "time": "0.000408s",
      "counterexample": "((T (E) 0 0 (E)),0,1,0,-1)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Quick",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.186239338+00:00",
      "status": "Failed",
      "tests": 4,
      "discards": 0,
      "time": "0.000396s",
      "counterexample": "((E),-1,1,-1,2)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Quick",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.189373311+00:00",
      "status": "Failed",
      "tests": 4,
      "discards": 0,
      "time": "0.000450s",
      "counterexample": "((E),-2,-1,1,-3)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Quick",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.192624980+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 0,
      "time": "0.000392s",
      "counterexample": "((E),0,-1,0,-1)",
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    },
    {
      "experiment": "ci-run",
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      "property": "prop_InsertInsert",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.195863860+00:00",
      "status": "Failed",
      "tests": 4,
      "discards": 0,
      "time": "0.000392s",
      "counterexample": "((T (E) 0 0 (E)),4,2,-3,0)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Quick",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.199060446+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.000388s",
      "counterexample": "((T (E) 0 0 (E)),0,1,-2,-3)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Quick",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.202296360+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 0,
      "time": "0.000378s",
      "counterexample": "((E),-1,0,0,1)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.209020077+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.001052s",
      "counterexample": "((E),-986,-999,-983,-988)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.212992938+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000990s",
      "counterexample": "((E),-998,-990,-983,-989)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.216811516+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.001008s",
      "counterexample": "((E),-982,-991,-992,-983)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.220643757+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000875s",
      "counterexample": "((E),-984,-982,-990,-986)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.224260132+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000995s",
      "counterexample": "((E),-993,-984,-991,-992)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.228135527+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.001002s",
      "counterexample": "((E),-980,-996,-987,-982)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.231933301+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000903s",
      "counterexample": "((E),-981,-990,-997,-1000)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.235526465+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000853s",
      "counterexample": "((E),-990,-994,-1000,-988)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.239207356+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000827s",
      "counterexample": "((E),-989,-993,-981,-995)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.242966167+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000840s",
      "counterexample": "((E),-991,-992,-992,-988)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.250184048+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 2,
      "time": "0.000359s",
      "counterexample": "((E),-233,118,-819,-427)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.253278898+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 4,
      "time": "0.000512s",
      "counterexample": "((T (E) -559 599 (E)),-296,805,473,-775)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.256504058+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 1,
      "time": "0.000307s",
      "counterexample": "((E),243,570,-219,-120)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.259537606+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 3,
      "time": "0.000372s",
      "counterexample": "((E),-56,-84,-670,-512)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.262737443+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 3,
      "time": "0.000390s",
      "counterexample": "((E),-277,324,312,315)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.265881668+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 2,
      "time": "0.000296s",
      "counterexample": "((E),-42,-261,-467,-346)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.268936710+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 0,
      "time": "0.000191s",
      "counterexample": "((E),-137,652,363,208)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Quick",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.520965653+00:00",
      "status": "Failed",
      "tests": 10,
      "discards": 8,
      "time": "0.000476s",
      "counterexample": "((E),(T (E) -2 -1 (E)),3,10)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.524277977+00:00",
      "status": "Failed",
      "tests": 13,
      "discards": 18,
      "time": "0.000541s",
      "counterexample": "((E),(T (E) -2 3 (T (E) 0 0 (E))),7,-6)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "property": "prop_InsertUnion",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.527650304+00:00",
      "status": "Failed",
      "tests": 12,
      "discards": 11,
      "time": "0.000533s",
      "counterexample": "((E),(T (T (E) 0 0 (E)) 3 3 (E)),9,-4)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Quick",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.530802429+00:00",
      "status": "Failed",
      "tests": 5,
      "discards": 0,
      "time": "0.000429s",
      "counterexample": "((E),(T (E) -1 0 (T (E) 0 0 (E))),4,1)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.537737133+00:00",
      "status": "Failed",
      "tests": 7,
      "discards": 1,
      "time": "0.001642s",
      "counterexample": "((E),(T (E) -988 -924 (E)),-939,-946)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.542316284+00:00",
      "status": "Failed",
      "tests": 5,
      "discards": 3,
      "time": "0.001326s",
      "counterexample": "((E),(T (E) -956 -973 (E)),-885,-960)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Hedgehog",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.546540102+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.001050s",
      "counterexample": "((E),(T (E) -998 -987 (E)),-989,-972)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.550458008+00:00",
      "status": "Failed",
      "tests": 6,
      "discards": 2,
      "time": "0.001564s",
      "counterexample": "((E),(T (E) -991 -996 (E)),-908,-932)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.554855621+00:00",
      "status": "Failed",
      "tests": 5,
      "discards": 2,
      "time": "0.001182s",
      "counterexample": "((E),(T (E) -996 -932 (E)),-933,-966)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.558887105+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.001023s",
      "counterexample": "((E),(T (E) -999 -980 (E)),-986,-973)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.562834045+00:00",
      "status": "Failed",
      "tests": 11,
      "discards": 11,
      "time": "0.003155s",
      "counterexample": "((E),(T (T (T (E) -987 -919 (E)) -966 -879 (E)) -750 -776 (E)),-749,-957)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.569158883+00:00",
      "status": "Failed",
      "tests": 5,
      "discards": 0,
      "time": "0.001028s",
      "counterexample": "((E),(T (E) -983 -963 (E)),-980,-991)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.573081479+00:00",
      "status": "Failed",
      "tests": 13,
      "discards": 13,
      "time": "0.003908s",
      "counterexample": "((E),(T (T (E) -990 -996 (E)) -790 -923 (E)),-577,-615)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.580063641+00:00",
      "status": "Failed",
      "tests": 4,
      "discards": 0,
      "time": "0.000994s",
      "counterexample": "((E),(T (E) -999 -995 (T (E) -988 -992 (E))),-966,-981)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.587881565+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 22,
      "time": "0.001804s",
      "counterexample": "((E),(T (E) -105 -95 (E)),143,-43)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
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      "property": "prop_InsertUnion",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.592730115+00:00",
      "status": "Failed",
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      "time": "0.005626s",
      "counterexample": "((E),(T (E) 457 -265 (E)),473,-502)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "property": "prop_InsertUnion",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.601340645+00:00",
      "status": "Failed",
      "tests": 4,
      "discards": 18,
      "time": "0.001793s",
      "counterexample": "((E),(T (T (T (E) -469 571 (T (E) -193 375 (E))) 601 480 (E)) 918 -262 (E)),-327,121)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
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    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.606086914+00:00",
      "status": "Failed",
      "tests": 10,
      "discards": 91,
      "time": "0.005575s",
      "counterexample": "((E),(T (E) -54 886 (E)),205,-564)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "property": "prop_InsertUnion",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 4,
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      "timestamp": "2026-04-30T18:12:18.614724575+00:00",
      "status": "Failed",
      "tests": 5,
      "discards": 41,
      "time": "0.003200s",
      "counterexample": "((E),(T (E) -675 -129 (E)),78,-445)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "property": "prop_InsertUnion",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.621020564+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 2,
      "time": "0.000385s",
      "counterexample": "((E),(T (E) -28 111 (E)),938,143)",
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    },
    {
      "experiment": "ci-run",
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      "property": "prop_InsertUnion",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.624259004+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 10,
      "time": "0.000984s",
      "counterexample": "((E),(T (E) -393 240 (T (E) 146 -138 (T (E) 874 53 (E)))),132,480)",
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      "property": "prop_InsertUnion",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.628242187+00:00",
      "status": "Failed",
      "tests": 17,
      "discards": 206,
      "time": "0.008599s",
      "counterexample": "((E),(T (E) -555 -168 (E)),15,-895)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.639838797+00:00",
      "status": "Failed",
      "tests": 18,
      "discards": 214,
      "time": "0.009678s",
      "counterexample": "((E),(T (E) -589 -807 (E)),-361,229)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.652579577+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 5,
      "time": "0.000585s",
      "counterexample": "((E),(T (E) -228 -158 (E)),110,138)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.661547593+00:00",
      "status": "Failed",
      "tests": 2039,
      "discards": 8,
      "time": "0.284799s",
      "counterexample": "((E),(T (E) 0 0 (E)),1,0)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "property": "prop_InsertUnion",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:18.950687829+00:00",
      "status": "Failed",
      "tests": 2039,
      "discards": 8,
      "time": "0.281169s",
      "counterexample": "((E),(T (E) 0 0 (E)),1,0)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:19.235857360+00:00",
      "status": "Failed",
      "tests": 2039,
      "discards": 8,
      "time": "0.282052s",
      "counterexample": "((E),(T (E) 0 0 (E)),1,0)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:19.521441659+00:00",
      "status": "Failed",
      "tests": 2039,
      "discards": 8,
      "time": "0.276955s",
      "counterexample": "((E),(T (E) 0 0 (E)),1,0)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:19.801887815+00:00",
      "status": "Failed",
      "tests": 2039,
      "discards": 8,
      "time": "0.278956s",
      "counterexample": "((E),(T (E) 0 0 (E)),1,0)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
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    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:20.084844720+00:00",
      "status": "Failed",
      "tests": 2039,
      "discards": 8,
      "time": "0.278859s",
      "counterexample": "((E),(T (E) 0 0 (E)),1,0)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
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    {
      "experiment": "ci-run",
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      "property": "prop_InsertUnion",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:20.367415892+00:00",
      "status": "Failed",
      "tests": 2039,
      "discards": 8,
      "time": "0.281522s",
      "counterexample": "((E),(T (E) 0 0 (E)),1,0)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
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    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:20.652680576+00:00",
      "status": "Failed",
      "tests": 2039,
      "discards": 8,
      "time": "0.279712s",
      "counterexample": "((E),(T (E) 0 0 (E)),1,0)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
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    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:20.935991263+00:00",
      "status": "Failed",
      "tests": 2039,
      "discards": 8,
      "time": "0.279827s",
      "counterexample": "((E),(T (E) 0 0 (E)),1,0)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
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    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
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      "status": "Failed",
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      "time": "0.279805s",
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      "time": "0.000295s",
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    },
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      "mode": "solve",
      "trial": 1,
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      "time": "0.000275s",
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    },
    {
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      "mode": "solve",
      "trial": 2,
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      "timestamp": "2026-04-30T18:12:21.514119751+00:00",
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      "time": "0.000281s",
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    {
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      "mode": "solve",
      "trial": 3,
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      "timestamp": "2026-04-30T18:12:21.517199639+00:00",
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      "time": "0.000265s",
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    },
    {
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      "mode": "solve",
      "trial": 4,
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      "timestamp": "2026-04-30T18:12:21.520234730+00:00",
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      "time": "0.000279s",
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    },
    {
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      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 5,
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      "timestamp": "2026-04-30T18:12:21.523446440+00:00",
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    },
    {
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      "mode": "solve",
      "trial": 6,
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    },
    {
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      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 7,
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      "timestamp": "2026-04-30T18:12:21.529628063+00:00",
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      "tests": 4,
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    },
    {
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      "mutations": [
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      "mode": "solve",
      "trial": 8,
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      "timestamp": "2026-04-30T18:12:21.532775803+00:00",
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      "time": "0.000277s",
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    },
    {
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      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 9,
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      "timestamp": "2026-04-30T18:12:21.535863505+00:00",
      "status": "Failed",
      "tests": 4,
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      "time": "0.000265s",
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    },
    {
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      "strategy": "Lean",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 0,
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      "timestamp": "2026-04-30T18:12:21.543072523+00:00",
      "status": "Failed",
      "tests": 9,
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      "time": "0.000390s",
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    },
    {
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      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:21.546532374+00:00",
      "status": "Failed",
      "tests": 9,
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      "time": "0.000387s",
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    },
    {
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      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 2,
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      "timestamp": "2026-04-30T18:12:21.549947420+00:00",
      "status": "Failed",
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      "time": "0.000348s",
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    },
    {
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      "mutations": [
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      "mode": "solve",
      "trial": 3,
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      "timestamp": "2026-04-30T18:12:21.553311792+00:00",
      "status": "Failed",
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    },
    {
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      "mode": "solve",
      "trial": 4,
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      "timestamp": "2026-04-30T18:12:21.556861676+00:00",
      "status": "Failed",
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      "time": "0.000356s",
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    },
    {
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      "mode": "solve",
      "trial": 5,
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      "timestamp": "2026-04-30T18:12:21.560196041+00:00",
      "status": "Failed",
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      "time": "0.000340s",
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    },
    {
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      "mode": "solve",
      "trial": 6,
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      "timestamp": "2026-04-30T18:12:21.563541338+00:00",
      "status": "Failed",
      "tests": 9,
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      "time": "0.000372s",
      "counterexample": "((E),(T (E) 0 0 (E)),1,0)",
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    },
    {
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      "mode": "solve",
      "trial": 7,
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      "timestamp": "2026-04-30T18:12:21.566779373+00:00",
      "status": "Failed",
      "tests": 9,
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      "time": "0.000343s",
      "counterexample": "((E),(T (E) 0 0 (E)),1,0)",
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    },
    {
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      "mode": "solve",
      "trial": 8,
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      "timestamp": "2026-04-30T18:12:21.570119339+00:00",
      "status": "Failed",
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      "time": "0.000366s",
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    },
    {
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      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 9,
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      "timestamp": "2026-04-30T18:12:21.573527884+00:00",
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      "time": "0.000378s",
      "counterexample": "((E),(T (E) 0 0 (E)),1,0)",
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    {
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      "mode": "solve",
      "trial": 0,
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    {
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      "mode": "solve",
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    {
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    {
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      "mode": "solve",
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      "timestamp": "2026-04-30T18:12:21.591276339+00:00",
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      "time": "0.000400s",
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    {
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      "trial": 4,
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      "timestamp": "2026-04-30T18:12:21.594664416+00:00",
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    {
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      "timestamp": "2026-04-30T18:12:21.598061348+00:00",
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      "time": "0.000354s",
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    {
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      "timestamp": "2026-04-30T18:12:21.601544212+00:00",
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      "time": "0.000415s",
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    {
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      "timestamp": "2026-04-30T18:12:21.604854497+00:00",
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    {
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      "mode": "solve",
      "trial": 8,
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      "timestamp": "2026-04-30T18:12:21.608297075+00:00",
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      "time": "0.000386s",
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      "mode": "solve",
      "trial": 9,
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      "timestamp": "2026-04-30T18:12:21.611720748+00:00",
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      "time": "0.000363s",
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    {
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      "strategy": "Size",
      "property": "prop_InsertUnion",
      "mutations": [
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      "trial": 0,
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      "timestamp": "2026-04-30T18:12:21.619127984+00:00",
      "status": "Failed",
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      "discards": 0,
      "time": "0.000424s",
      "counterexample": "Exception thrown while showing test case: 'BSTSIZE: getEnv: does not exist (no environment variable)'",
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    {
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      "property": "prop_InsertUnion",
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        "insert_2"
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      "mode": "solve",
      "trial": 1,
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      "timestamp": "2026-04-30T18:12:21.622449637+00:00",
      "status": "Failed",
      "tests": 0,
      "discards": 0,
      "time": "0.000444s",
      "counterexample": "Exception thrown while showing test case: 'BSTSIZE: getEnv: does not exist (no environment variable)'",
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    {
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      "mode": "solve",
      "trial": 2,
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      "timestamp": "2026-04-30T18:12:21.625629694+00:00",
      "status": "Failed",
      "tests": 0,
      "discards": 0,
      "time": "0.000430s",
      "counterexample": "Exception thrown while showing test case: 'BSTSIZE: getEnv: does not exist (no environment variable)'",
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    {
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      "property": "prop_InsertUnion",
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      "mode": "solve",
      "trial": 3,
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      "time": "0.000422s",
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      "time": "0.000445s",
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      "time": "0.000428s",
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      "discards": 0,
      "time": "0.000390s",
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      "discards": 0,
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      "status": "Failed",
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      "discards": 0,
      "time": "0.000438s",
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      "mode": "solve",
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      "status": "Failed",
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      "discards": 0,
      "time": "0.000393s",
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      "status": "Failed",
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      "discards": 0,
      "time": "0.000734s",
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      "discards": 0,
      "time": "0.000569s",
      "counterexample": "((T (E) -4 5 (T (E) -3 -12 (T (E) 2 -9 (E)))),(T (T (E) -11 10 (T (E) -4 9 (E))) -3 -1 (T (T (T (E) -1 -7 (E)) 0 -8 (E)) 3 -11 (T (T (T (E) 4 -2 (E)) 6 -6 (E)) 12 -8 (E)))),-9,1)",
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      "status": "Failed",
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      "discards": 0,
      "time": "0.000547s",
      "counterexample": "((T (T (E) -5 -3 (E)) -4 12 (T (E) 0 3 (T (E) 5 11 (E)))),(T (E) -12 12 (T (T (T (T (E) -11 0 (E)) -10 9 (E)) -8 -12 (E)) -3 -5 (T (T (T (E) 2 9 (E)) 3 9 (E)) 5 10 (T (T (E) 6 -3 (E)) 10 -7 (T (E) 13 -9 (E)))))),-6,-11)",
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      "status": "Failed",
      "tests": 50,
      "discards": 0,
      "time": "0.002055s",
      "counterexample": "((T (T (E) -5 -18 (E)) 1 -6 (T (T (E) 2 -25 (E)) 3 7 (E))),(T (T (T (E) -50 -22 (E)) -48 3 (T (E) -47 -40 (T (T (E) -44 20 (T (T (T (E) -42 -38 (E)) -41 -21 (E)) -39 15 (T (T (E) -38 12 (E)) -37 -3 (E)))) -35 -30 (E)))) -27 -34 (T (T (T (T (E) -26 -14 (E)) -20 -11 (T (E) -19 -41 (E))) -14 22 (T (E) -12 -18 (E))) -10 10 (T (T (E) -4 -13 (T (E) -2 -19 (E))) -1 -31 (T (T (T (E) 1 15 (T (T (E) 2 -13 (E)) 9 22 (T (E) 10 -9 (E)))) 12 11 (T (E) 16 -26 (T (E) 20 -36 (T (E) 25 -40 (E))))) 26 -39 (T (T (E) 27 -31 (E)) 28 13 (T (T (T (E) 38 22 (E)) 41 -26 (E)) 43 -21 (T (E) 44 25 (E)))))))),-8,0)",
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      "mode": "solve",
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      "status": "Failed",
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      "time": "0.000557s",
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      "mode": "solve",
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      "time": "0.000383s",
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      "property": "prop_UnionDeleteInsert",
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      "status": "Failed",
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      "time": "0.000506s",
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      "status": "Failed",
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      "status": "Failed",
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      "time": "0.000424s",
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      "property": "prop_UnionDeleteInsert",
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      "timestamp": "2026-04-30T18:12:21.707610342+00:00",
      "status": "Failed",
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      "discards": 11,
      "time": "0.000516s",
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      "mode": "solve",
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      "timestamp": "2026-04-30T18:12:21.710949782+00:00",
      "status": "Failed",
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      "time": "0.000423s",
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      "mode": "solve",
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      "timestamp": "2026-04-30T18:12:21.714159840+00:00",
      "status": "Failed",
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      "time": "0.000389s",
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    {
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      "mode": "solve",
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      "timestamp": "2026-04-30T18:12:21.717598942+00:00",
      "status": "Failed",
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      "discards": 1,
      "time": "0.000461s",
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      "mode": "solve",
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      "timestamp": "2026-04-30T18:12:21.720781224+00:00",
      "status": "Failed",
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      "discards": 0,
      "time": "0.000420s",
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    {
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      "property": "prop_UnionDeleteInsert",
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      "mode": "solve",
      "trial": 9,
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      "timestamp": "2026-04-30T18:12:21.723988684+00:00",
      "status": "Failed",
      "tests": 12,
      "discards": 11,
      "time": "0.000479s",
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    {
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      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
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      "mode": "solve",
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      "timestamp": "2026-04-30T18:12:21.732097677+00:00",
      "status": "Failed",
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      "discards": 0,
      "time": "0.001006s",
      "counterexample": "((T (E) -991 -991 (E)),(E),-980,-973)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
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      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
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        "insert_2"
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      "mode": "solve",
      "trial": 1,
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      "timestamp": "2026-04-30T18:12:21.736080645+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.000950s",
      "counterexample": "((T (E) -987 -985 (E)),(T (E) -991 -988 (E)),-964,-975)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
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    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
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      "mode": "solve",
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      "timestamp": "2026-04-30T18:12:21.739895604+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.001088s",
      "counterexample": "((T (E) -986 -994 (E)),(T (E) -996 -987 (E)),-974,-985)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
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      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
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      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:21.743762801+00:00",
      "status": "Failed",
      "tests": 23,
      "discards": 19,
      "time": "0.005372s",
      "counterexample": "((T (E) -653 -928 (E)),(E),-306,-866)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
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      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:21.752376416+00:00",
      "status": "Failed",
      "tests": 6,
      "discards": 1,
      "time": "0.001211s",
      "counterexample": "((T (E) -988 -999 (E)),(E),-917,-996)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:21.756534316+00:00",
      "status": "Failed",
      "tests": 4,
      "discards": 0,
      "time": "0.001010s",
      "counterexample": "((T (E) -977 -961 (E)),(T (T (E) -989 -990 (E)) -963 -983 (E)),-957,-986)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:21.760493985+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.000931s",
      "counterexample": "((T (E) -991 -980 (E)),(T (E) -994 -997 (E)),-989,-975)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:21.764210317+00:00",
      "status": "Failed",
      "tests": 5,
      "discards": 0,
      "time": "0.001095s",
      "counterexample": "((T (T (E) -993 -994 (E)) -990 -989 (E)),(E),-989,-930)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
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      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:21.768224461+00:00",
      "status": "Failed",
      "tests": 4,
      "discards": 1,
      "time": "0.001153s",
      "counterexample": "((T (E) -987 -966 (E)),(E),-953,-943)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
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      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:21.772309792+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.000974s",
      "counterexample": "((T (E) -988 -981 (E)),(E),-984,-966)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:21.780748284+00:00",
      "status": "Failed",
      "tests": 7,
      "discards": 37,
      "time": "0.003113s",
      "counterexample": "((T (E) 121 119 (E)),(E),176,-331)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
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      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:21.787150339+00:00",
      "status": "Failed",
      "tests": 9,
      "discards": 58,
      "time": "0.003938s",
      "counterexample": "((T (E) -191 125 (T (E) 23 -354 (E))),(T (E) 76 687 (E)),-20,-410)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
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      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:21.794135488+00:00",
      "status": "Failed",
      "tests": 11,
      "discards": 75,
      "time": "0.004373s",
      "counterexample": "((T (E) -342 -324 (E)),(E),-205,-388)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
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      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:21.801693111+00:00",
      "status": "Failed",
      "tests": 22,
      "discards": 244,
      "time": "0.010342s",
      "counterexample": "((T (E) -703 -147 (E)),(E),-1,-445)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
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      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:21.815268906+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 24,
      "time": "0.001969s",
      "counterexample": "((T (E) -420 8 (T (E) -194 261 (E))),(E),40,394)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
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      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:21.820282036+00:00",
      "status": "Failed",
      "tests": 5,
      "discards": 17,
      "time": "0.001778s",
      "counterexample": "((T (E) 34 267 (E)),(T (E) -401 29 (E)),34,-65)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
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      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:21.825167662+00:00",
      "status": "Failed",
      "tests": 12,
      "discards": 153,
      "time": "0.007149s",
      "counterexample": "((T (E) -764 512 (E)),(E),627,142)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
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      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:21.835269949+00:00",
      "status": "Failed",
      "tests": 10,
      "discards": 77,
      "time": "0.005154s",
      "counterexample": "((T (E) 3 220 (E)),(E),13,67)",
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    },
    {
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      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:21.843442189+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 5,
      "time": "0.000640s",
      "counterexample": "((T (E) -217 305 (E)),(T (E) 253 -295 (E)),-9,697)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
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      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:21.847040650+00:00",
      "status": "Failed",
      "tests": 9,
      "discards": 56,
      "time": "0.004010s",
      "counterexample": "((T (E) -454 -506 (E)),(E),412,-124)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
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      "strategy": "Small",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:21.859799182+00:00",
      "status": "Failed",
      "tests": 31,
      "discards": 0,
      "time": "0.000610s",
      "counterexample": "((T (E) 0 0 (E)),(E),1,0)",
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    },
    {
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      "strategy": "Small",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:21.863400623+00:00",
      "status": "Failed",
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      "discards": 0,
      "time": "0.000617s",
      "counterexample": "((T (E) 0 0 (E)),(E),1,0)",
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    },
    {
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      "strategy": "Small",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:21.866955132+00:00",
      "status": "Failed",
      "tests": 31,
      "discards": 0,
      "time": "0.000591s",
      "counterexample": "((T (E) 0 0 (E)),(E),1,0)",
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    },
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      "strategy": "Small",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:21.870448386+00:00",
      "status": "Failed",
      "tests": 31,
      "discards": 0,
      "time": "0.000606s",
      "counterexample": "((T (E) 0 0 (E)),(E),1,0)",
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    },
    {
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      "strategy": "Small",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:21.873963516+00:00",
      "status": "Failed",
      "tests": 31,
      "discards": 0,
      "time": "0.000585s",
      "counterexample": "((T (E) 0 0 (E)),(E),1,0)",
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    },
    {
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      "strategy": "Small",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:21.877330304+00:00",
      "status": "Failed",
      "tests": 31,
      "discards": 0,
      "time": "0.000613s",
      "counterexample": "((T (E) 0 0 (E)),(E),1,0)",
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    },
    {
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      "strategy": "Small",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:21.880769873+00:00",
      "status": "Failed",
      "tests": 31,
      "discards": 0,
      "time": "0.000559s",
      "counterexample": "((T (E) 0 0 (E)),(E),1,0)",
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    },
    {
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      "strategy": "Small",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:21.884139826+00:00",
      "status": "Failed",
      "tests": 31,
      "discards": 0,
      "time": "0.000655s",
      "counterexample": "((T (E) 0 0 (E)),(E),1,0)",
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    },
    {
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      "strategy": "Small",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:21.887595801+00:00",
      "status": "Failed",
      "tests": 31,
      "discards": 0,
      "time": "0.000602s",
      "counterexample": "((T (E) 0 0 (E)),(E),1,0)",
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    },
    {
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      "strategy": "Small",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:21.890952064+00:00",
      "status": "Failed",
      "tests": 31,
      "discards": 0,
      "time": "0.000618s",
      "counterexample": "((T (E) 0 0 (E)),(E),1,0)",
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    },
    {
      "experiment": "ci-run",
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      "language": "Haskell",
      "strategy": "SmallRev",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:21.899808893+00:00",
      "status": "Failed",
      "tests": 11,
      "discards": 20,
      "time": "0.000922s",
      "counterexample": "(1,0,(T (E) 0 0 (E)),(E))",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
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      "strategy": "SmallRev",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:21.903632966+00:00",
      "status": "Failed",
      "tests": 11,
      "discards": 20,
      "time": "0.000925s",
      "counterexample": "(1,0,(T (E) 0 0 (E)),(E))",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
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      "strategy": "SmallRev",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:21.907454043+00:00",
      "status": "Failed",
      "tests": 11,
      "discards": 20,
      "time": "0.000944s",
      "counterexample": "(1,0,(T (E) 0 0 (E)),(E))",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
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    {
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      "strategy": "SmallRev",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:21.911114745+00:00",
      "status": "Failed",
      "tests": 11,
      "discards": 20,
      "time": "0.000887s",
      "counterexample": "(1,0,(T (E) 0 0 (E)),(E))",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
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    {
      "experiment": "ci-run",
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      "strategy": "SmallRev",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:21.914846710+00:00",
      "status": "Failed",
      "tests": 11,
      "discards": 20,
      "time": "0.000995s",
      "counterexample": "(1,0,(T (E) 0 0 (E)),(E))",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
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    {
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      "strategy": "SmallRev",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
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      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:21.918627727+00:00",
      "status": "Failed",
      "tests": 11,
      "discards": 20,
      "time": "0.000858s",
      "counterexample": "(1,0,(T (E) 0 0 (E)),(E))",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
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    {
      "experiment": "ci-run",
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      "strategy": "SmallRev",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:21.922472714+00:00",
      "status": "Failed",
      "tests": 11,
      "discards": 20,
      "time": "0.000927s",
      "counterexample": "(1,0,(T (E) 0 0 (E)),(E))",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
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      "strategy": "SmallRev",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:21.926322775+00:00",
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      "time": "0.000909s",
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      "time": "0.000901s",
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      "mode": "solve",
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      "time": "0.000858s",
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    {
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      "time": "0.000388s",
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      "time": "0.000344s",
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      "time": "0.000403s",
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      "time": "0.000368s",
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      "timestamp": "2026-04-30T18:12:21.966580959+00:00",
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      "time": "0.000385s",
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      "timestamp": "2026-04-30T18:12:21.969897397+00:00",
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      "time": "0.000366s",
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      "mode": "solve",
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      "timestamp": "2026-04-30T18:12:21.973245403+00:00",
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      "time": "0.000383s",
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    {
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      "time": "0.000382s",
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      "time": "0.000380s",
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    {
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      "time": "0.000349s",
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      "trial": 4,
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      "timestamp": "2026-04-30T18:12:21.995195913+00:00",
      "status": "Failed",
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      "time": "0.000347s",
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    {
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      "time": "0.000389s",
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      "timestamp": "2026-04-30T18:12:22.001953130+00:00",
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      "time": "0.000355s",
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      "time": "0.000419s",
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      "timestamp": "2026-04-30T18:12:22.056583324+00:00",
      "status": "Failed",
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      "discards": 0,
      "time": "0.000470s",
      "counterexample": "((T (T (E) -3 3 (E)) -1 -1 (E)),(T (E) -1 -2 (E)),2,-2)",
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      "language": "Haskell",
      "strategy": "Correct",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:22.059906019+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.000396s",
      "counterexample": "((T (E) -3 -3 (E)),(T (E) -2 3 (T (E) 1 2 (E))),0,-3)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Correct",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:22.063100219+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000391s",
      "counterexample": "((T (E) 0 1 (E)),(T (E) -2 1 (E)),1,2)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Correct",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:22.066300260+00:00",
      "status": "Failed",
      "tests": 4,
      "discards": 0,
      "time": "0.000437s",
      "counterexample": "((T (E) -1 -3 (E)),(E),2,-4)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Correct",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:22.069698818+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.000455s",
      "counterexample": "((T (T (E) -3 2 (E)) 0 2 (E)),(E),-2,-3)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Correct",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:22.072887563+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000393s",
      "counterexample": "((T (E) -2 -1 (E)),(E),-1,0)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Correct",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:22.076052373+00:00",
      "status": "Failed",
      "tests": 8,
      "discards": 0,
      "time": "0.000437s",
      "counterexample": "((T (T (E) -3 -8 (T (E) 5 3 (E))) 7 -2 (E)),(T (E) 7 -3 (E)),6,-2)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Correct",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:22.079409092+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.000435s",
      "counterexample": "((T (E) 0 -2 (E)),(E),1,1)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Correct",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:22.082556620+00:00",
      "status": "Failed",
      "tests": 7,
      "discards": 0,
      "time": "0.000507s",
      "counterexample": "((T (T (T (E) -7 -3 (E)) -5 7 (T (E) -2 -7 (E))) -1 -5 (T (E) 4 0 (T (E) 5 -1 (E)))),(T (T (T (E) -5 1 (E)) -3 1 (E)) 5 1 (T (E) 6 -6 (T (E) 7 -6 (E)))),6,7)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Correct",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_2"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:22.085898296+00:00",
      "status": "Failed",
      "tests": 4,
      "discards": 0,
      "time": "0.000392s",
      "counterexample": "((T (T (E) -2 2 (E)) 0 0 (E)),(T (E) -3 -2 (E)),-2,-3)",
      "hash": "d591ef388923584ecb4b386ec3ac606bfd2e9dbd"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:31.460166529+00:00",
      "status": "Failed",
      "tests": 3402,
      "discards": 1642,
      "time": "0.009259s",
      "counterexample": "((T (E) 0 0 (E)),0,0,-2)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:31.472672091+00:00",
      "status": "Failed",
      "tests": 1401,
      "discards": 670,
      "time": "0.005409s",
      "counterexample": "((T (E) 0 0 (E)),0,0,1)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:31.481378862+00:00",
      "status": "Failed",
      "tests": 1501,
      "discards": 729,
      "time": "0.005380s",
      "counterexample": "((T (E) 0 0 (E)),0,0,-1)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Quick",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:31.489830129+00:00",
      "status": "Failed",
      "tests": 301,
      "discards": 144,
      "time": "0.002068s",
      "counterexample": "((T (E) 0 0 (E)),0,0,-1)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Quick",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:31.494896917+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000415s",
      "counterexample": "((T (E) 0 0 (E)),0,0,-1)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Quick",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:31.498068387+00:00",
      "status": "Failed",
      "tests": 3174,
      "discards": 1452,
      "time": "0.008548s",
      "counterexample": "((T (E) 11 13 (E)),11,11,-9)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Quick",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:31.509549567+00:00",
      "status": "Failed",
      "tests": 701,
      "discards": 322,
      "time": "0.003475s",
      "counterexample": "((T (E) 0 0 (E)),0,0,-1)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:31.516062821+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 0,
      "time": "0.000385s",
      "counterexample": "((T (E) 0 0 (E)),0,0,-1)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:31.519127149+00:00",
      "status": "Failed",
      "tests": 2018,
      "discards": 937,
      "time": "0.006362s",
      "counterexample": "((T (E) -2 2 (E)),-2,-2,-18)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:31.528317006+00:00",
      "status": "Failed",
      "tests": 201,
      "discards": 104,
      "time": "0.001499s",
      "counterexample": "((T (E) 0 0 (E)),0,0,-1)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:31.537870954+00:00",
      "status": "Failed",
      "tests": 168669,
      "discards": 80134,
      "time": "13.513767s",
      "counterexample": "((T (E) -982 -991 (E)),-982,-982,-977)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:45.054800127+00:00",
      "status": "Failed",
      "tests": 40345,
      "discards": 19063,
      "time": "3.101816s",
      "counterexample": "((T (E) -974 -960 (E)),-974,-974,-897)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:48.160029985+00:00",
      "status": "Failed",
      "tests": 13232,
      "discards": 6182,
      "time": "1.170779s",
      "counterexample": "((T (E) -880 -855 (E)),-880,-880,-785)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:49.334726344+00:00",
      "status": "Failed",
      "tests": 64978,
      "discards": 30825,
      "time": "5.134425s",
      "counterexample": "((T (E) -993 -993 (E)),-993,-993,-961)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:12:54.473111193+00:00",
      "status": "Failed",
      "tests": 94690,
      "discards": 45014,
      "time": "7.581866s",
      "counterexample": "((T (T (E) -995 -980 (E)) -981 -965 (E)),-995,-995,-964)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:13:02.058576432+00:00",
      "status": "Failed",
      "tests": 118858,
      "discards": 56714,
      "time": "9.013154s",
      "counterexample": "((T (E) -553 -824 (E)),-553,-553,-128)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:13:11.075179141+00:00",
      "status": "Failed",
      "tests": 276600,
      "discards": 131657,
      "time": "22.151494s",
      "counterexample": "((T (E) -916 -907 (E)),-916,-916,-18)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:13:33.229936798+00:00",
      "status": "Failed",
      "tests": 83871,
      "discards": 40033,
      "time": "6.783460s",
      "counterexample": "((T (E) -986 -981 (T (E) -985 -980 (E))),-985,-985,-964)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Hedgehog",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:13:40.017158549+00:00",
      "status": "Failed",
      "tests": 143613,
      "discards": 68510,
      "time": "11.220292s",
      "counterexample": "((T (E) -953 -826 (E)),-953,-953,-587)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:13:51.241322064+00:00",
      "status": "Failed",
      "tests": 54792,
      "discards": 25915,
      "time": "4.053195s",
      "counterexample": "((T (T (T (E) -997 -984 (E)) -977 -993 (E)) -966 -982 (E)),-997,-997,-882)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "InsertPost",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:13:55.303495554+00:00",
      "status": "timed_out",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Small",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:14:55.374455045+00:00",
      "status": "Failed",
      "tests": 5,
      "discards": 0,
      "time": "0.000281s",
      "counterexample": "((T (E) 0 0 (E)),0,0,1)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "language": "Haskell",
      "strategy": "Small",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:14:55.377950029+00:00",
      "status": "Failed",
      "tests": 5,
      "discards": 0,
      "time": "0.000233s",
      "counterexample": "((T (E) 0 0 (E)),0,0,1)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Small",
      "property": "prop_InsertPost",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:14:55.381086079+00:00",
      "status": "Failed",
      "tests": 5,
      "discards": 0,
      "time": "0.000222s",
      "counterexample": "((T (E) 0 0 (E)),0,0,1)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
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      "property": "prop_InsertModel",
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      "status": "Failed",
      "tests": 115,
      "discards": 52,
      "time": "0.001079s",
      "counterexample": "((T (T (E) 0 0 (E)) 3 -2 (E)),3,-4)",
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    {
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      "property": "prop_InsertModel",
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      "trial": 9,
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      "tests": 15,
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      "time": "0.000504s",
      "counterexample": "((T (E) -3 1 (T (E) 0 0 (E))),0,4)",
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    {
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      "property": "prop_InsertModel",
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      "trial": 0,
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      "timestamp": "2026-04-30T18:14:55.656812271+00:00",
      "status": "Failed",
      "tests": 228,
      "discards": 105,
      "time": "0.017043s",
      "counterexample": "((T (E) -945 -956 (T (E) -913 -814 (E))),-913,-857)",
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      "status": "Failed",
      "tests": 1138,
      "discards": 565,
      "time": "0.083252s",
      "counterexample": "((T (E) -998 -991 (E)),-998,-995)",
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    {
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      "status": "Failed",
      "tests": 1105,
      "discards": 599,
      "time": "0.080755s",
      "counterexample": "((T (E) -998 -989 (T (E) -981 -980 (E))),-981,-967)",
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      "tests": 267,
      "discards": 137,
      "time": "0.022078s",
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      "trial": 4,
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      "timestamp": "2026-04-30T18:14:55.873380034+00:00",
      "status": "Failed",
      "tests": 79,
      "discards": 32,
      "time": "0.009396s",
      "counterexample": "((T (E) -969 -926 (E)),-969,-839)",
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    {
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      "timestamp": "2026-04-30T18:14:55.886000004+00:00",
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      "tests": 415,
      "discards": 196,
      "time": "0.029344s",
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      "trial": 6,
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      "timestamp": "2026-04-30T18:14:55.918732216+00:00",
      "status": "Failed",
      "tests": 1382,
      "discards": 621,
      "time": "0.093333s",
      "counterexample": "((T (E) -985 -989 (E)),-985,-979)",
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    {
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      "trial": 7,
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      "timestamp": "2026-04-30T18:14:56.015820610+00:00",
      "status": "Failed",
      "tests": 609,
      "discards": 264,
      "time": "0.046953s",
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      "trial": 8,
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      "status": "Failed",
      "tests": 345,
      "discards": 158,
      "time": "0.026917s",
      "counterexample": "((T (E) -990 -1000 (E)),-990,-976)",
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    {
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      "status": "Failed",
      "tests": 1602,
      "discards": 752,
      "time": "0.141560s",
      "counterexample": "((T (E) -929 -527 (E)),-929,-819)",
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      "tests": 6882,
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      "time": "0.464226s",
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      "time": "0.003471s",
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    {
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      "trial": 7,
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      "property": "prop_InsertModel",
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      "mode": "solve",
      "trial": 8,
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      "timestamp": "2026-04-30T18:15:00.428530281+00:00",
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      "discards": 0,
      "time": "0.000259s",
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      "property": "prop_InsertModel",
      "mutations": [
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      "mode": "solve",
      "trial": 9,
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      "timestamp": "2026-04-30T18:15:00.431547047+00:00",
      "status": "Failed",
      "tests": 5,
      "discards": 0,
      "time": "0.000228s",
      "counterexample": "((T (E) 0 0 (E)),0,1)",
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    {
      "experiment": "ci-run",
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      "strategy": "SmallRev",
      "property": "prop_InsertModel",
      "mutations": [
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      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:15:00.440200442+00:00",
      "status": "Failed",
      "tests": 6,
      "discards": 2,
      "time": "0.000363s",
      "counterexample": "(0,0,(T (E) 0 1 (E)))",
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      "time": "0.000502s",
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      "timestamp": "2026-04-30T18:15:51.066915032+00:00",
      "status": "Failed",
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      "time": "10.615355s",
      "counterexample": "((T (E) -993 -983 (E)),-993,-993,-971)",
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      "timestamp": "2026-04-30T18:16:01.685772767+00:00",
      "status": "Failed",
      "tests": 106924,
      "discards": 50880,
      "time": "9.175338s",
      "counterexample": "((T (T (E) -985 -1000 (E)) -962 -973 (E)),-985,-985,-966)",
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      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:16:10.864938854+00:00",
      "status": "Failed",
      "tests": 298200,
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      "status": "Failed",
      "tests": 6,
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      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:52.031594213+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 0,
      "time": "0.000448s",
      "counterexample": "((T (E) 0 0 (E)),1,1,-1,0)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Quick",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:52.034845019+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 0,
      "time": "0.000398s",
      "counterexample": "((E),-1,-1,-1,1)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Quick",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:52.038070292+00:00",
      "status": "Failed",
      "tests": 4,
      "discards": 0,
      "time": "0.000399s",
      "counterexample": "((T (E) 0 0 (E)),3,3,-2,1)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Quick",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:52.041305940+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000433s",
      "counterexample": "((T (E) 0 0 (E)),-1,-1,-1,-2)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Quick",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:52.044567651+00:00",
      "status": "Failed",
      "tests": 17,
      "discards": 5,
      "time": "0.000537s",
      "counterexample": "((E),9,9,17,12)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Quick",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:52.047872719+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.000398s",
      "counterexample": "((E),-1,-1,0,-3)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Quick",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:52.051112802+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 0,
      "time": "0.000393s",
      "counterexample": "((T (E) 0 0 (E)),-1,-1,0,-1)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Quick",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:52.054249782+00:00",
      "status": "Failed",
      "tests": 20,
      "discards": 4,
      "time": "0.000563s",
      "counterexample": "((E),-6,-6,0,17)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Quick",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:52.057701639+00:00",
      "status": "Failed",
      "tests": 101,
      "discards": 53,
      "time": "0.001096s",
      "counterexample": "((E),0,0,0,1)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:52.068581588+00:00",
      "status": "Failed",
      "tests": 4,
      "discards": 0,
      "time": "0.001114s",
      "counterexample": "((E),-967,-967,-969,-947)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:52.072656980+00:00",
      "status": "Failed",
      "tests": 223,
      "discards": 87,
      "time": "0.017757s",
      "counterexample": "((E),-898,-898,-882,-846)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:52.093451932+00:00",
      "status": "Failed",
      "tests": 210,
      "discards": 95,
      "time": "0.018335s",
      "counterexample": "((T (T (E) -986 -993 (E)) -985 -999 (E)),-942,-942,-995,-936)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:52.115214718+00:00",
      "status": "Failed",
      "tests": 332,
      "discards": 137,
      "time": "0.030105s",
      "counterexample": "((E),121,121,-924,-456)",
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    },
    {
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      "strategy": "Hedgehog",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:52.148571821+00:00",
      "status": "Failed",
      "tests": 549,
      "discards": 274,
      "time": "0.061691s",
      "counterexample": "((T (T (E) -909 -835 (E)) -816 -743 (E)),-732,-732,-970,-795)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:52.213850827+00:00",
      "status": "Failed",
      "tests": 151,
      "discards": 53,
      "time": "0.013183s",
      "counterexample": "((E),-976,-976,-942,-988)",
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    },
    {
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      "strategy": "Hedgehog",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:52.230479045+00:00",
      "status": "Failed",
      "tests": 225,
      "discards": 101,
      "time": "0.025705s",
      "counterexample": "((E),-634,-634,-830,-934)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:52.259608877+00:00",
      "status": "Failed",
      "tests": 51,
      "discards": 27,
      "time": "0.007118s",
      "counterexample": "((T (T (E) -704 -814 (E)) -176 -351 (E)),62,62,408,-223)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:52.270067306+00:00",
      "status": "Failed",
      "tests": 113,
      "discards": 51,
      "time": "0.012208s",
      "counterexample": "((E),-919,-919,-937,-851)",
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    },
    {
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      "strategy": "Hedgehog",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 9,
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      "timestamp": "2026-04-30T18:17:52.285535232+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.001095s",
      "counterexample": "((E),-995,-995,-997,-991)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 0,
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      "timestamp": "2026-04-30T18:17:52.295324343+00:00",
      "status": "Failed",
      "tests": 286,
      "discards": 676,
      "time": "0.024860s",
      "counterexample": "((E),-25,-25,34,-312)",
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    },
    {
      "experiment": "ci-run",
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      "property": "prop_InsertInsert",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 1,
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      "timestamp": "2026-04-30T18:17:52.323447677+00:00",
      "status": "Failed",
      "tests": 65,
      "discards": 121,
      "time": "0.006924s",
      "counterexample": "((E),-160,-160,-11,-334)",
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    },
    {
      "experiment": "ci-run",
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      "property": "prop_InsertInsert",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 2,
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      "timestamp": "2026-04-30T18:17:52.333723192+00:00",
      "status": "Failed",
      "tests": 4890,
      "discards": 10430,
      "time": "0.349414s",
      "counterexample": "((E),649,649,878,284)",
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    },
    {
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      "property": "prop_InsertInsert",
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        "insert_3"
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      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:52.686841762+00:00",
      "status": "Failed",
      "tests": 1029,
      "discards": 2322,
      "time": "0.078118s",
      "counterexample": "((E),-175,-175,-820,774)",
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    },
    {
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      "property": "prop_InsertInsert",
      "mutations": [
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      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:52.768201849+00:00",
      "status": "Failed",
      "tests": 387,
      "discards": 836,
      "time": "0.030258s",
      "counterexample": "((E),531,531,-535,-57)",
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    },
    {
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      "property": "prop_InsertInsert",
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        "insert_3"
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      "mode": "solve",
      "trial": 5,
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      "timestamp": "2026-04-30T18:17:52.801580054+00:00",
      "status": "Failed",
      "tests": 2170,
      "discards": 4791,
      "time": "0.162230s",
      "counterexample": "((T (E) 49 415 (E)),-377,-377,-314,66)",
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    },
    {
      "experiment": "ci-run",
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      "property": "prop_InsertInsert",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:52.967165601+00:00",
      "status": "Failed",
      "tests": 531,
      "discards": 1129,
      "time": "0.041289s",
      "counterexample": "((E),-314,-314,-492,-296)",
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    },
    {
      "experiment": "ci-run",
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      "property": "prop_InsertInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:53.011850755+00:00",
      "status": "Failed",
      "tests": 637,
      "discards": 1359,
      "time": "0.047077s",
      "counterexample": "((E),97,97,447,250)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_InsertInsert",
      "mutations": [
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      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:53.062130765+00:00",
      "status": "Failed",
      "tests": 545,
      "discards": 1076,
      "time": "0.039223s",
      "counterexample": "((E),-6,-6,593,-586)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:53.104620660+00:00",
      "status": "Failed",
      "tests": 1732,
      "discards": 3755,
      "time": "0.126639s",
      "counterexample": "((T (T (E) -658 -265 (E)) -16 -294 (T (E) 497 229 (E))),462,462,223,240)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "language": "Haskell",
      "strategy": "Small",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:53.240750787+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000250s",
      "counterexample": "((E),0,0,0,1)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 1,
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      "timestamp": "2026-04-30T18:17:53.244200642+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000260s",
      "counterexample": "((E),0,0,0,1)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:53.247550268+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000254s",
      "counterexample": "((E),0,0,0,1)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:53.250588046+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000245s",
      "counterexample": "((E),0,0,0,1)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Small",
      "property": "prop_InsertInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:53.253672906+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
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      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:53.937695760+00:00",
      "status": "Failed",
      "tests": 951,
      "discards": 1052,
      "time": "0.145215s",
      "counterexample": "((T (E) -985 -999 (E)),(T (E) -989 -993 (E)),-989,-997)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Hedgehog",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:54.086449291+00:00",
      "status": "Failed",
      "tests": 370,
      "discards": 435,
      "time": "0.059823s",
      "counterexample": "((E),(T (E) -999 -989 (T (E) -996 -1000 (E))),-996,-957)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Hedgehog",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:54.149900845+00:00",
      "status": "Failed",
      "tests": 1696,
      "discards": 2007,
      "time": "0.271352s",
      "counterexample": "((E),(T (E) -982 -981 (E)),-982,-995)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Hedgehog",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:54.425006734+00:00",
      "status": "Failed",
      "tests": 1789,
      "discards": 1992,
      "time": "0.294443s",
      "counterexample": "((E),(T (E) -197 -486 (E)),-197,-663)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Hedgehog",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:54.723091169+00:00",
      "status": "Failed",
      "tests": 433,
      "discards": 473,
      "time": "0.069307s",
      "counterexample": "((E),(T (E) -962 -979 (E)),-962,-942)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:54.795740851+00:00",
      "status": "Failed",
      "tests": 776,
      "discards": 930,
      "time": "0.129554s",
      "counterexample": "((T (T (E) -992 -994 (T (E) -980 -992 (E))) -967 -946 (E)),(T (T (T (E) -1000 -995 (E)) -981 -999 (E)) -962 -983 (E)),-1000,-976)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:54.928660006+00:00",
      "status": "Failed",
      "tests": 3283,
      "discards": 3799,
      "time": "0.640717s",
      "counterexample": "((E),(T (E) -443 -14 (E)),-443,248)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:55.572914216+00:00",
      "status": "Failed",
      "tests": 566,
      "discards": 703,
      "time": "0.124385s",
      "counterexample": "((E),(T (E) -485 -962 (E)),-485,-74)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Hedgehog",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:55.700870026+00:00",
      "status": "Failed",
      "tests": 203,
      "discards": 200,
      "time": "0.030644s",
      "counterexample": "((E),(T (E) -1000 -982 (E)),-1000,-964)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:55.743537064+00:00",
      "status": "Failed",
      "tests": 14358,
      "discards": 128465,
      "time": "3.756169s",
      "counterexample": "((E),(T (E) -703 467 (E)),-703,457)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Falsify",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:17:59.505339725+00:00",
      "status": "Failed",
      "tests": 18739,
      "discards": 165937,
      "time": "4.846067s",
      "counterexample": "((T (E) -629 511 (E)),(T (E) -334 -877 (E)),-334,-276)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:04.357243017+00:00",
      "status": "Failed",
      "tests": 2334,
      "discards": 21316,
      "time": "0.622726s",
      "counterexample": "((E),(T (E) -749 585 (T (E) -475 -243 (E))),-475,30)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:04.983846284+00:00",
      "status": "Failed",
      "tests": 11309,
      "discards": 100259,
      "time": "2.950891s",
      "counterexample": "((T (E) 682 570 (E)),(T (E) 386 57 (E)),386,-406)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:07.939227474+00:00",
      "status": "Failed",
      "tests": 5549,
      "discards": 51340,
      "time": "1.504947s",
      "counterexample": "((E),(T (T (T (E) -371 448 (E)) 43 358 (E)) 53 400 (E)),53,-241)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:09.448616730+00:00",
      "status": "Failed",
      "tests": 8292,
      "discards": 75224,
      "time": "2.201716s",
      "counterexample": "((E),(T (E) 574 830 (E)),574,19)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:11.655324249+00:00",
      "status": "Failed",
      "tests": 546,
      "discards": 5023,
      "time": "0.147190s",
      "counterexample": "((E),(T (E) -775 -158 (E)),-775,253)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:11.805957647+00:00",
      "status": "Failed",
      "tests": 107,
      "discards": 1128,
      "time": "0.034826s",
      "counterexample": "((E),(T (E) -617 -529 (E)),-617,-451)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:11.843942167+00:00",
      "status": "Failed",
      "tests": 3468,
      "discards": 32115,
      "time": "0.938868s",
      "counterexample": "((E),(T (E) 158 380 (E)),158,-532)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:12.786564741+00:00",
      "status": "Failed",
      "tests": 3658,
      "discards": 33299,
      "time": "0.996821s",
      "counterexample": "((E),(T (E) 51 155 (E)),51,-452)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:13.794791737+00:00",
      "status": "Failed",
      "tests": 23,
      "discards": 0,
      "time": "0.000505s",
      "counterexample": "((E),(T (E) 0 0 (E)),0,1)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:13.798483416+00:00",
      "status": "Failed",
      "tests": 23,
      "discards": 0,
      "time": "0.000490s",
      "counterexample": "((E),(T (E) 0 0 (E)),0,1)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:13.801822695+00:00",
      "status": "Failed",
      "tests": 23,
      "discards": 0,
      "time": "0.000492s",
      "counterexample": "((E),(T (E) 0 0 (E)),0,1)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:13.805251473+00:00",
      "status": "Failed",
      "tests": 23,
      "discards": 0,
      "time": "0.000513s",
      "counterexample": "((E),(T (E) 0 0 (E)),0,1)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:13.808932811+00:00",
      "status": "Failed",
      "tests": 23,
      "discards": 0,
      "time": "0.000472s",
      "counterexample": "((E),(T (E) 0 0 (E)),0,1)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:13.812310782+00:00",
      "status": "Failed",
      "tests": 23,
      "discards": 0,
      "time": "0.000484s",
      "counterexample": "((E),(T (E) 0 0 (E)),0,1)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:13.815647578+00:00",
      "status": "Failed",
      "tests": 23,
      "discards": 0,
      "time": "0.000463s",
      "counterexample": "((E),(T (E) 0 0 (E)),0,1)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:13.819096249+00:00",
      "status": "Failed",
      "tests": 23,
      "discards": 0,
      "time": "0.000509s",
      "counterexample": "((E),(T (E) 0 0 (E)),0,1)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Small",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:13.822672282+00:00",
      "status": "Failed",
      "tests": 23,
      "discards": 0,
      "time": "0.000454s",
      "counterexample": "((E),(T (E) 0 0 (E)),0,1)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Small",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:13.825957938+00:00",
      "status": "Failed",
      "tests": 23,
      "discards": 0,
      "time": "0.000480s",
      "counterexample": "((E),(T (E) 0 0 (E)),0,1)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "SmallRev",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:13.835774821+00:00",
      "status": "Failed",
      "tests": 6,
      "discards": 2,
      "time": "0.000360s",
      "counterexample": "(0,0,(E),(T (E) 0 1 (E)))",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "SmallRev",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:13.839212+00:00",
      "status": "Failed",
      "tests": 6,
      "discards": 2,
      "time": "0.000363s",
      "counterexample": "(0,0,(E),(T (E) 0 1 (E)))",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "language": "Haskell",
      "strategy": "SmallRev",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:13.842490067+00:00",
      "status": "Failed",
      "tests": 6,
      "discards": 2,
      "time": "0.000356s",
      "counterexample": "(0,0,(E),(T (E) 0 1 (E)))",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "language": "Haskell",
      "strategy": "SmallRev",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:13.845629452+00:00",
      "status": "Failed",
      "tests": 6,
      "discards": 2,
      "time": "0.000319s",
      "counterexample": "(0,0,(E),(T (E) 0 1 (E)))",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
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      "strategy": "Size",
      "property": "prop_InsertUnion",
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      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:14.000250645+00:00",
      "status": "Failed",
      "tests": 0,
      "discards": 0,
      "time": "0.000409s",
      "counterexample": "Exception thrown while showing test case: 'BSTSIZE: getEnv: does not exist (no environment variable)'",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
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      "property": "prop_InsertUnion",
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        "insert_3"
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      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:14.003401379+00:00",
      "status": "Failed",
      "tests": 0,
      "discards": 0,
      "time": "0.000449s",
      "counterexample": "Exception thrown while showing test case: 'BSTSIZE: getEnv: does not exist (no environment variable)'",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
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        "insert_3"
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      "mode": "solve",
      "trial": 0,
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      "timestamp": "2026-04-30T18:18:14.015922344+00:00",
      "status": "Failed",
      "tests": 6,
      "discards": 0,
      "time": "0.000481s",
      "counterexample": "((E),(T (T (T (E) 0 -5 (E)) 2 -2 (E)) 5 -1 (T (E) 6 -5 (E))),0,3)",
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        "insert_3"
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      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:14.019439943+00:00",
      "status": "Failed",
      "tests": 13,
      "discards": 0,
      "time": "0.000627s",
      "counterexample": "((E),(T (T (E) -13 -1 (T (E) -9 -10 (T (E) -8 11 (E)))) -7 -11 (T (T (T (T (T (E) -4 -13 (E)) -2 -6 (E)) 0 -7 (T (T (E) 2 9 (E)) 5 13 (E))) 6 3 (E)) 11 13 (E))),-7,-7)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
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    {
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      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:14.022983085+00:00",
      "status": "Failed",
      "tests": 6,
      "discards": 0,
      "time": "0.000453s",
      "counterexample": "((T (T (T (T (E) -5 3 (E)) -1 -5 (E)) 0 4 (E)) 6 1 (E)),(T (T (E) -4 0 (E)) 2 6 (T (E) 3 -2 (E))),-4,-1)",
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      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:14.026173924+00:00",
      "status": "Failed",
      "tests": 16,
      "discards": 0,
      "time": "0.000732s",
      "counterexample": "((T (T (T (T (E) -13 -1 (E)) -11 10 (T (E) -9 -8 (E))) -3 13 (T (E) 0 7 (E))) 3 -14 (T (E) 14 -6 (T (E) 16 -8 (E)))),(T (T (T (E) -14 10 (T (E) -8 9 (E))) -3 -1 (T (E) -1 8 (T (T (E) 0 15 (E)) 1 -13 (E)))) 2 12 (T (E) 6 -9 (T (T (E) 8 -3 (T (E) 9 -6 (T (E) 12 -13 (E)))) 15 8 (E)))),15,-10)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
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    {
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      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:14.029772878+00:00",
      "status": "Failed",
      "tests": 13,
      "discards": 0,
      "time": "0.000606s",
      "counterexample": "((T (T (E) -12 -3 (E)) -8 9 (T (T (T (T (T (E) -4 -2 (T (E) -3 7 (E))) -2 -8 (E)) 0 -10 (T (T (E) 1 9 (E)) 2 8 (E))) 6 -8 (T (E) 8 -1 (E))) 12 11 (E))),(T (T (T (T (E) -13 9 (T (T (E) -11 1 (E)) -5 5 (E))) 4 11 (T (E) 6 8 (E))) 7 -2 (T (E) 8 -6 (E))) 10 3 (E)),10,-13)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
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      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:14.033288418+00:00",
      "status": "Failed",
      "tests": 9,
      "discards": 0,
      "time": "0.000530s",
      "counterexample": "((T (T (E) -9 7 (E)) -2 -6 (T (T (E) 1 -3 (E)) 3 -5 (T (E) 4 7 (E)))),(T (E) -4 5 (T (E) 1 -3 (E))),-4,0)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
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    {
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      "strategy": "Correct",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:14.036634737+00:00",
      "status": "Failed",
      "tests": 4,
      "discards": 0,
      "time": "0.000446s",
      "counterexample": "((E),(T (T (E) -4 -3 (E)) -3 0 (T (E) -2 -2 (T (E) 1 -1 (E)))),-3,4)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
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    {
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      "strategy": "Correct",
      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:14.039801964+00:00",
      "status": "Failed",
      "tests": 5,
      "discards": 0,
      "time": "0.000443s",
      "counterexample": "((T (E) -3 -3 (E)),(T (E) 0 -1 (T (T (E) 1 -2 (E)) 2 -5 (T (E) 5 2 (E)))),0,-4)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
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      "property": "prop_InsertUnion",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:14.043117401+00:00",
      "status": "Failed",
      "tests": 4,
      "discards": 0,
      "time": "0.000406s",
      "counterexample": "((T (E) -1 0 (T (E) 0 -2 (E))),(T (E) -3 -3 (E)),-3,-1)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
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        "insert_3"
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      "mode": "solve",
      "trial": 9,
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      "timestamp": "2026-04-30T18:18:14.046428034+00:00",
      "status": "Failed",
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      "discards": 0,
      "time": "0.000478s",
      "counterexample": "((T (T (E) 3 -5 (E)) 4 6 (E)),(T (T (E) -3 -5 (T (T (E) -2 6 (E)) 1 6 (E))) 5 -4 (E)),-2,-6)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
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      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 0,
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      "timestamp": "2026-04-30T18:18:14.058121660+00:00",
      "status": "Failed",
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      "discards": 2,
      "time": "0.000517s",
      "counterexample": "((T (E) -2 1 (T (E) 0 0 (E))),(E),0,-3)",
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      "property": "prop_UnionDeleteInsert",
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        "insert_3"
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      "mode": "solve",
      "trial": 1,
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      "timestamp": "2026-04-30T18:18:14.061619901+00:00",
      "status": "Failed",
      "tests": 142,
      "discards": 156,
      "time": "0.001766s",
      "counterexample": "((T (T (E) 0 -1 (E)) 6 -1 (E)),(T (E) -5 0 (T (E) -1 1 (E))),0,-14)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
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      "property": "prop_UnionDeleteInsert",
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      "mode": "solve",
      "trial": 2,
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      "timestamp": "2026-04-30T18:18:14.066487039+00:00",
      "status": "Failed",
      "tests": 106,
      "discards": 88,
      "time": "0.001311s",
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      "mode": "solve",
      "trial": 3,
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      "discards": 361,
      "time": "0.003563s",
      "counterexample": "((T (E) 0 0 (E)),(E),0,2)",
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      "property": "prop_UnionDeleteInsert",
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        "insert_3"
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      "mode": "solve",
      "trial": 4,
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      "timestamp": "2026-04-30T18:18:14.077483666+00:00",
      "status": "Failed",
      "tests": 4,
      "discards": 0,
      "time": "0.000450s",
      "counterexample": "((T (E) -1 1 (T (E) 0 0 (E))),(E),0,3)",
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      "property": "prop_UnionDeleteInsert",
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        "insert_3"
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      "mode": "solve",
      "trial": 5,
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      "timestamp": "2026-04-30T18:18:14.080687043+00:00",
      "status": "Failed",
      "tests": 110,
      "discards": 104,
      "time": "0.001367s",
      "counterexample": "((T (E) 0 -2 (E)),(T (E) -1 -1 (E)),0,1)",
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      "property": "prop_UnionDeleteInsert",
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      "mode": "solve",
      "trial": 6,
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      "timestamp": "2026-04-30T18:18:14.085024394+00:00",
      "status": "Failed",
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      "time": "0.000634s",
      "counterexample": "((T (E) 2 3 (E)),(T (E) 1 -2 (E)),2,9)",
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      "property": "prop_UnionDeleteInsert",
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      "mode": "solve",
      "trial": 7,
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      "timestamp": "2026-04-30T18:18:14.088543802+00:00",
      "status": "Failed",
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      "discards": 16,
      "time": "0.000602s",
      "counterexample": "((T (E) 3 4 (E)),(E),3,13)",
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      "mode": "solve",
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      "timestamp": "2026-04-30T18:18:14.092021559+00:00",
      "status": "Failed",
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      "discards": 127,
      "time": "0.001394s",
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      "property": "prop_UnionDeleteInsert",
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      "mode": "solve",
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      "timestamp": "2026-04-30T18:18:14.096482801+00:00",
      "status": "Failed",
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      "discards": 19,
      "time": "0.000629s",
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      "time": "0.070589s",
      "counterexample": "((T (E) -936 -901 (E)),(E),-936,-837)",
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      "timestamp": "2026-04-30T18:18:14.180758480+00:00",
      "status": "Failed",
      "tests": 1163,
      "discards": 1343,
      "time": "0.180011s",
      "counterexample": "((T (T (E) -972 -994 (E)) -952 -977 (E)),(E),-952,-931)",
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      "mode": "solve",
      "trial": 2,
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      "timestamp": "2026-04-30T18:18:14.364563338+00:00",
      "status": "Failed",
      "tests": 826,
      "discards": 978,
      "time": "0.156681s",
      "counterexample": "((T (E) -998 -961 (E)),(T (T (E) -996 -998 (E)) -987 -995 (E)),-998,-979)",
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      "property": "prop_UnionDeleteInsert",
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        "insert_3"
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      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:14.525067469+00:00",
      "status": "Failed",
      "tests": 386,
      "discards": 419,
      "time": "0.079298s",
      "counterexample": "((T (E) -978 -987 (E)),(E),-978,-939)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
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      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:14.608374952+00:00",
      "status": "Failed",
      "tests": 6892,
      "discards": 7911,
      "time": "1.386654s",
      "counterexample": "((T (E) -986 -981 (E)),(T (E) -999 -987 (E)),-986,-982)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:15.998669551+00:00",
      "status": "Failed",
      "tests": 798,
      "discards": 1021,
      "time": "0.180492s",
      "counterexample": "((T (E) -961 -819 (T (E) -860 -961 (E))),(E),-961,-992)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:16.182995172+00:00",
      "status": "Failed",
      "tests": 390,
      "discards": 445,
      "time": "0.067108s",
      "counterexample": "((T (E) -692 -760 (E)),(E),-692,-772)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:16.253738098+00:00",
      "status": "Failed",
      "tests": 2115,
      "discards": 2596,
      "time": "0.337837s",
      "counterexample": "((T (E) -998 -912 (E)),(E),-998,-872)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:16.595189621+00:00",
      "status": "Failed",
      "tests": 737,
      "discards": 866,
      "time": "0.117782s",
      "counterexample": "((T (E) -984 -991 (E)),(T (E) -991 -999 (E)),-984,-979)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:16.716732141+00:00",
      "status": "Failed",
      "tests": 2547,
      "discards": 2856,
      "time": "0.380994s",
      "counterexample": "((T (E) -1000 -990 (E)),(T (E) -996 -980 (E)),-1000,-963)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:17.108171206+00:00",
      "status": "Failed",
      "tests": 5972,
      "discards": 53989,
      "time": "1.579349s",
      "counterexample": "((T (E) -231 56 (T (E) 263 -483 (E))),(E),-231,260)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:18.691703981+00:00",
      "status": "Failed",
      "tests": 6035,
      "discards": 54877,
      "time": "1.597529s",
      "counterexample": "((T (E) -508 -914 (E)),(E),-508,0)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:20.293295636+00:00",
      "status": "Failed",
      "tests": 1683,
      "discards": 14642,
      "time": "0.430415s",
      "counterexample": "((T (E) 314 -196 (E)),(E),314,251)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:20.727471324+00:00",
      "status": "Failed",
      "tests": 5014,
      "discards": 45379,
      "time": "1.316762s",
      "counterexample": "((T (E) 252 467 (E)),(E),252,-213)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:22.048160780+00:00",
      "status": "Failed",
      "tests": 5822,
      "discards": 50902,
      "time": "1.485823s",
      "counterexample": "((T (E) -665 414 (E)),(E),-665,95)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:23.538040532+00:00",
      "status": "Failed",
      "tests": 2650,
      "discards": 24233,
      "time": "0.720278s",
      "counterexample": "((T (E) 331 127 (E)),(E),331,-719)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:24.262031988+00:00",
      "status": "Failed",
      "tests": 11392,
      "discards": 102933,
      "time": "3.011934s",
      "counterexample": "((T (E) -219 233 (E)),(T (E) 82 -465 (E)),-219,-359)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:27.278762921+00:00",
      "status": "Failed",
      "tests": 540,
      "discards": 4820,
      "time": "0.142946s",
      "counterexample": "((T (T (E) -178 478 (E)) 127 620 (E)),(E),127,4)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:27.425284336+00:00",
      "status": "Failed",
      "tests": 770,
      "discards": 7487,
      "time": "0.226444s",
      "counterexample": "((T (T (E) -389 635 (E)) -186 24 (E)),(E),-186,-781)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:27.655278107+00:00",
      "status": "Failed",
      "tests": 3759,
      "discards": 33651,
      "time": "1.003309s",
      "counterexample": "((T (E) -292 -43 (E)),(E),-292,703)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Small",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:28.669256993+00:00",
      "status": "Failed",
      "tests": 5,
      "discards": 0,
      "time": "0.000295s",
      "counterexample": "((T (E) 0 0 (E)),(E),0,1)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:28.672668388+00:00",
      "status": "Failed",
      "tests": 5,
      "discards": 0,
      "time": "0.000242s",
      "counterexample": "((T (E) 0 0 (E)),(E),0,1)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:28.675794687+00:00",
      "status": "Failed",
      "tests": 5,
      "discards": 0,
      "time": "0.000247s",
      "counterexample": "((T (E) 0 0 (E)),(E),0,1)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:28.678905769+00:00",
      "status": "Failed",
      "tests": 5,
      "discards": 0,
      "time": "0.000239s",
      "counterexample": "((T (E) 0 0 (E)),(E),0,1)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:28.681955266+00:00",
      "status": "Failed",
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      "discards": 0,
      "time": "0.000239s",
      "counterexample": "((T (E) 0 0 (E)),(E),0,1)",
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    },
    {
      "experiment": "ci-run",
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      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:28.685003163+00:00",
      "status": "Failed",
      "tests": 5,
      "discards": 0,
      "time": "0.000237s",
      "counterexample": "((T (E) 0 0 (E)),(E),0,1)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:28.688021422+00:00",
      "status": "Failed",
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      "discards": 0,
      "time": "0.000230s",
      "counterexample": "((T (E) 0 0 (E)),(E),0,1)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:28.691133328+00:00",
      "status": "Failed",
      "tests": 5,
      "discards": 0,
      "time": "0.000230s",
      "counterexample": "((T (E) 0 0 (E)),(E),0,1)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:28.694084138+00:00",
      "status": "Failed",
      "tests": 5,
      "discards": 0,
      "time": "0.000241s",
      "counterexample": "((T (E) 0 0 (E)),(E),0,1)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:28.697119261+00:00",
      "status": "Failed",
      "tests": 5,
      "discards": 0,
      "time": "0.000232s",
      "counterexample": "((T (E) 0 0 (E)),(E),0,1)",
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    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "SmallRev",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:28.706647931+00:00",
      "status": "Failed",
      "tests": 15,
      "discards": 20,
      "time": "0.001024s",
      "counterexample": "(0,0,(T (E) 0 0 (E)),(T (E) 0 1 (E)))",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "SmallRev",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:28.710630356+00:00",
      "status": "Failed",
      "tests": 15,
      "discards": 20,
      "time": "0.000996s",
      "counterexample": "(0,0,(T (E) 0 0 (E)),(T (E) 0 1 (E)))",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "SmallRev",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:28.714612481+00:00",
      "status": "Failed",
      "tests": 15,
      "discards": 20,
      "time": "0.001100s",
      "counterexample": "(0,0,(T (E) 0 0 (E)),(T (E) 0 1 (E)))",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "SmallRev",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:28.718628489+00:00",
      "status": "Failed",
      "tests": 15,
      "discards": 20,
      "time": "0.001054s",
      "counterexample": "(0,0,(T (E) 0 0 (E)),(T (E) 0 1 (E)))",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "SmallRev",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:28.722517975+00:00",
      "status": "Failed",
      "tests": 15,
      "discards": 20,
      "time": "0.001028s",
      "counterexample": "(0,0,(T (E) 0 0 (E)),(T (E) 0 1 (E)))",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "SmallRev",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:28.726416411+00:00",
      "status": "Failed",
      "tests": 15,
      "discards": 20,
      "time": "0.000997s",
      "counterexample": "(0,0,(T (E) 0 0 (E)),(T (E) 0 1 (E)))",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "SmallRev",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:28.730264368+00:00",
      "status": "Failed",
      "tests": 15,
      "discards": 20,
      "time": "0.000974s",
      "counterexample": "(0,0,(T (E) 0 0 (E)),(T (E) 0 1 (E)))",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "SmallRev",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 7,
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      "timestamp": "2026-04-30T18:18:28.733981986+00:00",
      "status": "Failed",
      "tests": 15,
      "discards": 20,
      "time": "0.001043s",
      "counterexample": "(0,0,(T (E) 0 0 (E)),(T (E) 0 1 (E)))",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "SmallRev",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:28.737843718+00:00",
      "status": "Failed",
      "tests": 15,
      "discards": 20,
      "time": "0.001021s",
      "counterexample": "(0,0,(T (E) 0 0 (E)),(T (E) 0 1 (E)))",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "SmallRev",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:28.741740080+00:00",
      "status": "Failed",
      "tests": 15,
      "discards": 20,
      "time": "0.001067s",
      "counterexample": "(0,0,(T (E) 0 0 (E)),(T (E) 0 1 (E)))",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Lean",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:28.752201141+00:00",
      "status": "Failed",
      "tests": 14,
      "discards": null,
      "time": "0.000439s",
      "counterexample": "((T (E) 0 0 (E)),(E),0,1)",
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      "discards": 0,
      "time": "0.000441s",
      "counterexample": "((T (E) -7 4 (T (E) 1 -4 (T (E) 4 -3 (T (T (E) 5 0 (E)) 7 1 (E))))),(T (T (T (E) 3 7 (E)) 5 7 (E)) 7 7 (E)),5,7)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Correct",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:28.887130174+00:00",
      "status": "Failed",
      "tests": 8,
      "discards": 0,
      "time": "0.000461s",
      "counterexample": "((T (E) -7 2 (T (T (E) -5 8 (E)) -3 -1 (T (E) -1 -8 (E)))),(T (T (E) -8 8 (E)) 4 -2 (E)),-3,-6)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
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      "strategy": "Correct",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:28.890395016+00:00",
      "status": "Failed",
      "tests": 11,
      "discards": 0,
      "time": "0.000547s",
      "counterexample": "((T (T (E) -7 -10 (T (E) -5 -5 (T (E) -2 -10 (E)))) -1 -8 (T (E) 2 8 (T (E) 4 5 (T (T (E) 5 7 (E)) 10 -6 (E))))),(T (T (T (E) -10 2 (E)) -8 9 (T (E) -5 0 (E))) -1 0 (T (E) 2 4 (T (T (T (E) 6 -3 (E)) 9 -5 (E)) 10 9 (E)))),-2,-8)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Correct",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
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      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:28.893790236+00:00",
      "status": "Failed",
      "tests": 20,
      "discards": 0,
      "time": "0.000776s",
      "counterexample": "((T (T (T (T (E) -18 -9 (T (E) -17 10 (E))) -16 -8 (T (T (T (T (E) -5 19 (E)) -3 -13 (E)) 0 15 (E)) 1 -6 (T (E) 4 11 (E)))) 5 -20 (T (T (E) 9 11 (E)) 16 7 (E))) 20 13 (E)),(T (T (T (T (T (E) -18 16 (E)) -17 4 (E)) -11 -1 (T (T (E) -10 -11 (T (E) -4 -15 (E))) -2 16 (T (E) 1 -4 (E)))) 4 -4 (T (E) 8 -20 (T (E) 9 -7 (T (T (E) 12 -18 (E)) 13 -5 (E))))) 20 19 (E)),1,11)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Correct",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:28.897476426+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.000437s",
      "counterexample": "((T (T (T (E) -1 -1 (E)) 0 -2 (E)) 3 2 (E)),(E),-1,1)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
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      "language": "Haskell",
      "strategy": "Correct",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:28.900733157+00:00",
      "status": "Failed",
      "tests": 7,
      "discards": 0,
      "time": "0.000489s",
      "counterexample": "((T (E) -4 -5 (T (E) -3 6 (T (E) 2 -5 (E)))),(T (E) 2 -7 (T (E) 5 1 (E))),-4,-6)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Correct",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "insert_3"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:28.904012938+00:00",
      "status": "Failed",
      "tests": 17,
      "discards": 0,
      "time": "0.000662s",
      "counterexample": "((T (T (T (T (E) -15 -3 (T (T (E) -14 -17 (E)) -7 -5 (E))) -5 1 (E)) -4 3 (E)) -3 -1 (T (E) -1 7 (T (E) 7 5 (T (E) 8 4 (T (E) 9 -8 (E)))))),(T (E) -16 7 (E)),-7,5)",
      "hash": "1aa82da444dcffae95b0e30aadac3bfebd721e4c"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:38.478697122+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000460s",
      "counterexample": "((T (E) 0 0 (E)),2)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Quick",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:38.482388348+00:00",
      "status": "Failed",
      "tests": 4,
      "discards": 0,
      "time": "0.000434s",
      "counterexample": "((T (E) -1 0 (T (E) 0 0 (E))),4)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Quick",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:38.485643960+00:00",
      "status": "Failed",
      "tests": 4,
      "discards": 0,
      "time": "0.000424s",
      "counterexample": "((T (T (E) 0 0 (E)) 1 0 (E)),-3)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Quick",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:38.488804846+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 0,
      "time": "0.000375s",
      "counterexample": "((T (E) 0 0 (E)),1)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Quick",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:38.492019892+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 0,
      "time": "0.000389s",
      "counterexample": "((T (E) 0 0 (E)),-1)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Quick",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:38.495297406+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000425s",
      "counterexample": "((T (E) 0 0 (E)),1)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Quick",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_4"
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      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:38.498544813+00:00",
      "status": "Failed",
      "tests": 4,
      "discards": 0,
      "time": "0.000418s",
      "counterexample": "((T (T (E) 0 0 (E)) 1 1 (E)),3)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Quick",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:38.501691975+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 0,
      "time": "0.000373s",
      "counterexample": "((T (E) 0 0 (E)),-1)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Quick",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_4"
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      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:38.504845143+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 0,
      "time": "0.000380s",
      "counterexample": "((T (E) 0 0 (E)),1)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Quick",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:38.508110987+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.000405s",
      "counterexample": "((T (E) 0 0 (E)),-3)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:38.518430364+00:00",
      "status": "Failed",
      "tests": 13,
      "discards": 11,
      "time": "0.002594s",
      "counterexample": "((T (E) -971 -953 (E)),-956)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
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    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_4"
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      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:38.524141937+00:00",
      "status": "Failed",
      "tests": 4,
      "discards": 0,
      "time": "0.001005s",
      "counterexample": "((T (T (E) -999 -1000 (E)) -996 -994 (E)),-941)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:38.528076756+00:00",
      "status": "Failed",
      "tests": 11,
      "discards": 7,
      "time": "0.001849s",
      "counterexample": "((T (E) -919 -933 (E)),-866)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_4"
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      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:38.532862587+00:00",
      "status": "Failed",
      "tests": 4,
      "discards": 0,
      "time": "0.000961s",
      "counterexample": "((T (E) -1000 -995 (T (E) -990 -1000 (E))),-990)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
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      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:38.536732850+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.000930s",
      "counterexample": "((T (E) -993 -993 (E)),-964)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:38.540607539+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.000914s",
      "counterexample": "((T (E) -999 -988 (E)),-975)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:38.544291950+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.000907s",
      "counterexample": "((T (E) -996 -984 (E)),-960)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:38.547902678+00:00",
      "status": "Failed",
      "tests": 5,
      "discards": 0,
      "time": "0.001174s",
      "counterexample": "((T (T (E) -991 -985 (E)) -963 -997 (E)),-947)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:38.552098786+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.000872s",
      "counterexample": "((T (E) -989 -980 (E)),-990)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:38.555802137+00:00",
      "status": "Failed",
      "tests": 6,
      "discards": 0,
      "time": "0.001012s",
      "counterexample": "((T (E) -950 -986 (E)),-909)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:38.568919100+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 0,
      "time": "0.000218s",
      "counterexample": "((T (E) -432 248 (E)),283)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:38.572260222+00:00",
      "status": "Failed",
      "tests": 6,
      "discards": 14,
      "time": "0.001187s",
      "counterexample": "((T (T (E) -454 446 (E)) -435 -522 (E)),-204)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:38.576461404+00:00",
      "status": "Failed",
      "tests": 19,
      "discards": 32,
      "time": "0.002799s",
      "counterexample": "((T (T (E) 80 217 (E)) 175 493 (E)),225)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:38.582328853+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 4,
      "time": "0.000571s",
      "counterexample": "((T (E) 232 -437 (E)),693)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Falsify",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:38.585696948+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 2,
      "time": "0.000348s",
      "counterexample": "((T (E) -221 -221 (E)),-65)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
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      "counterexample": "((T (E) 0 -1 (E)),3,0)",
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    },
    {
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      "property": "prop_DeletePost",
      "mutations": [
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      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:38.862890274+00:00",
      "status": "Failed",
      "tests": 301,
      "discards": 138,
      "time": "0.002010s",
      "counterexample": "((T (E) 0 0 (E)),1,0)",
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    },
    {
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      "property": "prop_DeletePost",
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      "mode": "solve",
      "trial": 4,
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      "timestamp": "2026-04-30T18:18:38.867999006+00:00",
      "status": "Failed",
      "tests": 70,
      "discards": 25,
      "time": "0.000754s",
      "counterexample": "((T (T (E) 2 -3 (E)) 12 16 (E)),36,2)",
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    },
    {
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      "property": "prop_DeletePost",
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      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:38.871633669+00:00",
      "status": "Failed",
      "tests": 191,
      "discards": 109,
      "time": "0.001453s",
      "counterexample": "((T (E) 12 -8 (E)),-27,12)",
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    },
    {
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      "mode": "solve",
      "trial": 6,
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      "timestamp": "2026-04-30T18:18:38.876125157+00:00",
      "status": "Failed",
      "tests": 203,
      "discards": 84,
      "time": "0.001433s",
      "counterexample": "((T (E) 0 0 (E)),3,0)",
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    },
    {
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      "property": "prop_DeletePost",
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      "mode": "solve",
      "trial": 7,
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      "timestamp": "2026-04-30T18:18:38.880515643+00:00",
      "status": "Failed",
      "tests": 203,
      "discards": 95,
      "time": "0.001498s",
      "counterexample": "((T (E) 0 0 (E)),1,0)",
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    },
    {
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      "property": "prop_DeletePost",
      "mutations": [
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      "mode": "solve",
      "trial": 8,
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      "timestamp": "2026-04-30T18:18:38.884925249+00:00",
      "status": "Failed",
      "tests": 19,
      "discards": 7,
      "time": "0.000495s",
      "counterexample": "((T (E) 4 -2 (E)),-12,4)",
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    },
    {
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      "property": "prop_DeletePost",
      "mutations": [
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      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:38.888259350+00:00",
      "status": "Failed",
      "tests": 178,
      "discards": 75,
      "time": "0.001285s",
      "counterexample": "((T (E) -18 -15 (T (E) 3 1 (E))),-51,-18)",
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    },
    {
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      "strategy": "Hedgehog",
      "property": "prop_DeletePost",
      "mutations": [
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      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:38.899755185+00:00",
      "status": "Failed",
      "tests": 221,
      "discards": 96,
      "time": "0.023224s",
      "counterexample": "((T (E) -992 -909 (E)),-792,-992)",
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    },
    {
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      "property": "prop_DeletePost",
      "mutations": [
        "delete_4"
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      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:38.926044022+00:00",
      "status": "Failed",
      "tests": 505,
      "discards": 201,
      "time": "0.032963s",
      "counterexample": "((T (T (E) -983 -965 (E)) -951 -982 (E)),-939,-983)",
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    },
    {
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      "property": "prop_DeletePost",
      "mutations": [
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      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:38.962314061+00:00",
      "status": "Failed",
      "tests": 357,
      "discards": 150,
      "time": "0.033168s",
      "counterexample": "((T (E) -936 -956 (E)),-929,-936)",
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    },
    {
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      "property": "prop_DeletePost",
      "mutations": [
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      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:38.998754737+00:00",
      "status": "Failed",
      "tests": 272,
      "discards": 131,
      "time": "0.021978s",
      "counterexample": "((T (E) -994 -990 (E)),-973,-994)",
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    },
    {
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      "property": "prop_DeletePost",
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      "mode": "solve",
      "trial": 4,
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      "timestamp": "2026-04-30T18:18:39.024112146+00:00",
      "status": "Failed",
      "tests": 537,
      "discards": 241,
      "time": "0.050492s",
      "counterexample": "((T (E) -703 -71 (E)),189,-703)",
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    },
    {
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      "property": "prop_DeletePost",
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      "mode": "solve",
      "trial": 5,
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      "timestamp": "2026-04-30T18:18:39.077812267+00:00",
      "status": "Failed",
      "tests": 739,
      "discards": 311,
      "time": "0.067237s",
      "counterexample": "((T (E) -455 -496 (E)),-849,-455)",
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      "property": "prop_DeletePost",
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      "trial": 6,
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      "timestamp": "2026-04-30T18:18:39.148456480+00:00",
      "status": "Failed",
      "tests": 430,
      "discards": 200,
      "time": "0.029569s",
      "counterexample": "((T (T (E) -869 -985 (E)) -693 -860 (E)),-968,-693)",
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    },
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      "property": "prop_DeletePost",
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      "mode": "solve",
      "trial": 7,
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      "timestamp": "2026-04-30T18:18:39.181431310+00:00",
      "status": "Failed",
      "tests": 2849,
      "discards": 1354,
      "time": "0.183986s",
      "counterexample": "((T (E) -980 -981 (E)),-999,-980)",
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    },
    {
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      "property": "prop_DeletePost",
      "mutations": [
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      "mode": "solve",
      "trial": 8,
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      "timestamp": "2026-04-30T18:18:39.368864029+00:00",
      "status": "Failed",
      "tests": 140,
      "discards": 79,
      "time": "0.014802s",
      "counterexample": "((T (T (E) -923 -985 (E)) -869 -845 (E)),-712,-869)",
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      "property": "prop_DeletePost",
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      "mode": "solve",
      "trial": 9,
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      "timestamp": "2026-04-30T18:18:39.387081755+00:00",
      "status": "Failed",
      "tests": 621,
      "discards": 286,
      "time": "0.042491s",
      "counterexample": "((T (T (T (E) -984 -980 (E)) -967 -979 (E)) -937 -961 (E)),-948,-984)",
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    },
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      "trial": 0,
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      "timestamp": "2026-04-30T18:18:39.442086738+00:00",
      "status": "Failed",
      "tests": 6211,
      "discards": 13526,
      "time": "0.435876s",
      "counterexample": "((T (E) 53 600 (E)),-748,53)",
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    {
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      "mode": "solve",
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      "timestamp": "2026-04-30T18:18:39.881649874+00:00",
      "status": "Failed",
      "tests": 613,
      "discards": 1222,
      "time": "0.043059s",
      "counterexample": "((T (E) -620 -161 (T (T (T (E) -46 261 (T (E) 261 606 (E))) 478 -519 (E)) 594 -209 (E))),-134,594)",
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      "timestamp": "2026-04-30T18:18:39.928031602+00:00",
      "status": "Failed",
      "tests": 104,
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      "time": "0.010582s",
      "counterexample": "((T (E) 444 -592 (E)),-572,444)",
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      "timestamp": "2026-04-30T18:18:39.941656888+00:00",
      "status": "Failed",
      "tests": 674,
      "discards": 1298,
      "time": "0.045178s",
      "counterexample": "((T (E) 232 181 (E)),269,232)",
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      "timestamp": "2026-04-30T18:18:39.990197376+00:00",
      "status": "Failed",
      "tests": 561,
      "discards": 1222,
      "time": "0.042169s",
      "counterexample": "((T (E) -128 927 (E)),-184,-128)",
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      "trial": 5,
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      "timestamp": "2026-04-30T18:18:40.036023662+00:00",
      "status": "Failed",
      "tests": 356,
      "discards": 743,
      "time": "0.027075s",
      "counterexample": "((T (E) 554 490 (E)),143,554)",
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    },
    {
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      "mode": "solve",
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      "timestamp": "2026-04-30T18:18:40.066801473+00:00",
      "status": "Failed",
      "tests": 11391,
      "discards": 24628,
      "time": "0.788523s",
      "counterexample": "((T (E) -25 25 (T (E) 272 -415 (E))),383,-25)",
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    },
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      "timestamp": "2026-04-30T18:18:40.859689107+00:00",
      "status": "Failed",
      "tests": 547,
      "discards": 1206,
      "time": "0.041155s",
      "counterexample": "((T (E) -207 -139 (E)),-601,-207)",
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    },
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      "property": "prop_DeletePost",
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      "trial": 8,
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      "timestamp": "2026-04-30T18:18:40.904430806+00:00",
      "status": "Failed",
      "tests": 4300,
      "discards": 9159,
      "time": "0.295319s",
      "counterexample": "((T (E) 98 -35 (E)),-304,98)",
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    },
    {
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      "property": "prop_DeletePost",
      "mutations": [
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      "mode": "solve",
      "trial": 9,
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      "timestamp": "2026-04-30T18:18:41.203664724+00:00",
      "status": "Failed",
      "tests": 1593,
      "discards": 3511,
      "time": "0.115431s",
      "counterexample": "((T (E) -217 111 (E)),-268,-217)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
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      "property": "prop_DeletePost",
      "mutations": [
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      "mode": "solve",
      "trial": 0,
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      "timestamp": "2026-04-30T18:18:41.332107297+00:00",
      "status": "Failed",
      "tests": 29,
      "discards": 2,
      "time": "0.000644s",
      "counterexample": "((T (E) 0 0 (E)),1,0)",
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    },
    {
      "experiment": "ci-run",
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      "property": "prop_DeletePost",
      "mutations": [
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      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:41.335896058+00:00",
      "status": "Failed",
      "tests": 29,
      "discards": 2,
      "time": "0.000587s",
      "counterexample": "((T (E) 0 0 (E)),1,0)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
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      "property": "prop_DeletePost",
      "mutations": [
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      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:41.339316736+00:00",
      "status": "Failed",
      "tests": 29,
      "discards": 2,
      "time": "0.000610s",
      "counterexample": "((T (E) 0 0 (E)),1,0)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_DeletePost",
      "mutations": [
        "delete_4"
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      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:41.342891194+00:00",
      "status": "Failed",
      "tests": 29,
      "discards": 2,
      "time": "0.000551s",
      "counterexample": "((T (E) 0 0 (E)),1,0)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_DeletePost",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:41.346276501+00:00",
      "status": "Failed",
      "tests": 29,
      "discards": 2,
      "time": "0.000598s",
      "counterexample": "((T (E) 0 0 (E)),1,0)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
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      "property": "prop_DeletePost",
      "mutations": [
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      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:18:41.349790413+00:00",
      "status": "Failed",
      "tests": 29,
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      "trial": 0,
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      "timestamp": "2026-04-30T18:22:43.566818644+00:00",
      "status": "Failed",
      "tests": 103,
      "discards": 0,
      "time": "0.002099s",
      "counterexample": "((T (T (E) -2 2 (E)) -1 1 (T (E) 1 2 (E))),-1,-2)",
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      "property": "prop_DeleteDelete",
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      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:43.572507900+00:00",
      "status": "Failed",
      "tests": 135,
      "discards": 0,
      "time": "0.002411s",
      "counterexample": "((T (T (E) -25 6 (E)) -24 -29 (T (T (T (T (E) -20 -33 (T (E) -17 -4 (E))) -13 19 (E)) -12 -12 (E)) -9 33 (T (T (T (E) -8 -18 (T (T (E) -3 -23 (E)) 0 24 (E))) 4 19 (T (E) 6 10 (T (T (T (E) 8 0 (E)) 9 -31 (E)) 13 -16 (T (T (T (E) 15 27 (E)) 17 -10 (E)) 20 25 (T (E) 21 -17 (E)))))) 23 20 (T (T (E) 27 -32 (E)) 29 -6 (T (E) 35 21 (E)))))),20,6)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
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      "property": "prop_DeleteDelete",
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        "delete_4"
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      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:43.578211257+00:00",
      "status": "Failed",
      "tests": 119,
      "discards": 0,
      "time": "0.002001s",
      "counterexample": "((T (T (T (E) -19 -18 (T (E) -1 -2 (E))) 11 3 (T (E) 13 -2 (E))) 14 -7 (T (T (T (E) 15 -12 (E)) 18 -8 (E)) 19 10 (E))),13,14)",
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      "property": "prop_DeleteDelete",
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        "delete_4"
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      "mode": "solve",
      "trial": 3,
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      "timestamp": "2026-04-30T18:22:43.583516436+00:00",
      "status": "Failed",
      "tests": 82,
      "discards": 0,
      "time": "0.001573s",
      "counterexample": "((T (E) -68 76 (T (T (T (T (E) -63 49 (E)) -53 -47 (T (E) -52 72 (E))) -46 -29 (T (E) -31 20 (E))) 9 -54 (T (T (T (T (E) 20 58 (T (E) 24 32 (T (E) 25 -49 (T (E) 30 26 (E))))) 31 -4 (E)) 36 12 (T (T (E) 37 9 (E)) 41 79 (T (T (T (E) 43 49 (E)) 46 -37 (E)) 48 70 (E)))) 74 -13 (E)))),46,41)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
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      "property": "prop_DeleteDelete",
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      "mode": "solve",
      "trial": 4,
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      "timestamp": "2026-04-30T18:22:43.588126371+00:00",
      "status": "Failed",
      "tests": 119,
      "discards": 0,
      "time": "0.001993s",
      "counterexample": "((T (T (T (E) -16 11 (E)) -12 -14 (T (E) -11 7 (E))) -7 10 (T (T (E) -6 -7 (T (E) -2 -13 (E))) 1 -17 (T (T (E) 2 -4 (T (T (T (E) 3 -13 (E)) 6 7 (T (E) 7 15 (E))) 10 9 (E))) 11 2 (T (T (E) 13 19 (E)) 16 17 (E))))),-7,1)",
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      "property": "prop_DeleteDelete",
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        "delete_4"
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      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:43.593253339+00:00",
      "status": "Failed",
      "tests": 233,
      "discards": 0,
      "time": "0.003474s",
      "counterexample": "((T (T (T (T (E) -22 31 (E)) -18 6 (E)) -16 13 (T (E) -14 -5 (E))) -8 23 (T (T (E) 4 -14 (T (E) 13 16 (E))) 14 -14 (T (T (E) 25 -27 (T (E) 26 11 (E))) 27 6 (E)))),13,14)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
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      "strategy": "Correct",
      "property": "prop_DeleteDelete",
      "mutations": [
        "delete_4"
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      "mode": "solve",
      "trial": 6,
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      "timestamp": "2026-04-30T18:22:43.599999290+00:00",
      "status": "Failed",
      "tests": 37,
      "discards": 0,
      "time": "0.000769s",
      "counterexample": "((T (T (T (E) -30 -19 (E)) -26 -5 (T (E) -24 22 (E))) -22 -34 (T (T (T (E) -21 3 (T (E) 7 -11 (E))) 12 -30 (T (T (E) 13 -29 (T (E) 15 13 (T (E) 20 33 (E)))) 21 -20 (T (E) 23 12 (E)))) 27 -10 (T (E) 28 18 (E)))),7,12)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
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      "property": "prop_DeleteDelete",
      "mutations": [
        "delete_4"
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      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:43.603656024+00:00",
      "status": "Failed",
      "tests": 242,
      "discards": 0,
      "time": "0.003417s",
      "counterexample": "((T (T (T (T (E) -42 -20 (E)) -37 13 (T (E) -32 -5 (T (T (T (E) -24 -1 (T (T (E) -23 -29 (T (E) -22 -39 (E))) -16 13 (T (T (E) -12 -9 (E)) -8 -4 (E)))) -4 11 (T (E) -2 26 (E))) 1 27 (T (T (E) 5 2 (E)) 7 -27 (E))))) 9 31 (T (T (E) 10 -14 (T (T (E) 12 0 (E)) 14 39 (E))) 16 30 (T (E) 17 -18 (T (E) 21 -4 (T (E) 29 28 (E)))))) 33 38 (T (E) 36 -2 (T (E) 40 -40 (E)))),-24,-16)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
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      "property": "prop_DeleteDelete",
      "mutations": [
        "delete_4"
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      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:43.610337814+00:00",
      "status": "Failed",
      "tests": 25,
      "discards": 0,
      "time": "0.000633s",
      "counterexample": "((T (T (T (T (T (E) -25 -20 (T (E) -22 -12 (E))) -20 19 (E)) -18 11 (E)) -13 -15 (T (T (T (E) -12 -18 (E)) -6 20 (T (E) -1 -24 (T (E) 8 -23 (E)))) 12 10 (T (E) 17 23 (E)))) 20 -18 (T (T (E) 23 5 (E)) 25 -25 (E))),-25,20)",
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      "property": "prop_DeleteDelete",
      "mutations": [
        "delete_4"
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      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:43.613987105+00:00",
      "status": "Failed",
      "tests": 93,
      "discards": 0,
      "time": "0.001969s",
      "counterexample": "((T (T (T (T (E) -90 -62 (T (T (E) -80 -23 (T (E) -63 4 (E))) -60 22 (T (E) -59 73 (E)))) -54 -80 (T (E) -52 54 (T (E) -48 52 (E)))) -42 74 (T (T (T (E) -38 84 (E)) -34 78 (T (E) -28 24 (T (T (E) -26 5 (E)) -23 51 (T (T (E) -7 13 (E)) -3 -54 (E))))) -2 87 (T (E) 1 47 (T (E) 2 6 (E))))) 3 -46 (T (T (E) 5 -91 (T (T (T (T (E) 6 28 (E)) 11 87 (T (E) 15 -41 (T (E) 19 71 (E)))) 26 -55 (T (E) 28 -46 (E))) 31 44 (T (T (T (E) 35 48 (T (E) 39 -69 (E))) 41 19 (T (T (E) 44 -83 (T (E) 45 -57 (E))) 48 20 (E))) 50 9 (E)))) 56 68 (T (T (T (T (E) 57 -53 (E)) 58 13 (E)) 61 -63 (T (E) 65 -30 (E))) 71 42 (T (T (T (T (E) 73 69 (E)) 75 -62 (T (E) 79 -48 (E))) 86 22 (E)) 89 -84 (T (E) 93 73 (E)))))),3,48)",
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      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_4"
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      "mode": "solve",
      "trial": 0,
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      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000526s",
      "counterexample": "((E),2,-2,2)",
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    },
    {
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      "property": "prop_DeleteInsert",
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        "delete_4"
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      "mode": "solve",
      "trial": 1,
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      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000425s",
      "counterexample": "((T (E) 0 0 (E)),2,0,2)",
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    },
    {
      "experiment": "ci-run",
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      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_4"
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      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:43.636146841+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000414s",
      "counterexample": "((E),-2,-1,-1)",
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    {
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      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_4"
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      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:43.639475450+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 0,
      "time": "0.000446s",
      "counterexample": "((E),1,-1,-1)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
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      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_4"
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      "mode": "solve",
      "trial": 4,
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      "timestamp": "2026-04-30T18:22:43.642847222+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 0,
      "time": "0.000397s",
      "counterexample": "((E),-1,0,0)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
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      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_4"
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      "mode": "solve",
      "trial": 5,
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      "timestamp": "2026-04-30T18:22:43.646174325+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.000445s",
      "counterexample": "((E),-1,3,0)",
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    {
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      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_4"
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      "mode": "solve",
      "trial": 6,
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      "timestamp": "2026-04-30T18:22:43.649455938+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 0,
      "time": "0.000433s",
      "counterexample": "((E),1,-1,1)",
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    },
    {
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      "property": "prop_DeleteInsert",
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        "delete_4"
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      "mode": "solve",
      "trial": 7,
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      "timestamp": "2026-04-30T18:22:43.652859805+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 0,
      "time": "0.000408s",
      "counterexample": "((E),1,0,0)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Quick",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_4"
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      "mode": "solve",
      "trial": 8,
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      "timestamp": "2026-04-30T18:22:43.656275789+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000437s",
      "counterexample": "((E),-2,1,2)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Quick",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_4"
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      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:43.659622780+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 0,
      "time": "0.000435s",
      "counterexample": "((T (E) 0 0 (E)),1,0,1)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_4"
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      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:43.671167681+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.001044s",
      "counterexample": "((E),-994,-981,-986)",
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    },
    {
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      "strategy": "Hedgehog",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_4"
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      "mode": "solve",
      "trial": 1,
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      "timestamp": "2026-04-30T18:22:43.675384669+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000871s",
      "counterexample": "((E),-996,-993,-994)",
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    },
    {
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      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_4"
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      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:43.679554108+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000884s",
      "counterexample": "((E),-997,-987,-991)",
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    },
    {
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      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_4"
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      "mode": "solve",
      "trial": 3,
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      "timestamp": "2026-04-30T18:22:43.683436158+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000887s",
      "counterexample": "((E),-999,-991,-995)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
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      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_4"
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      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:43.687227063+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000905s",
      "counterexample": "((E),-994,-991,-992)",
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    {
      "experiment": "ci-run",
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      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_4"
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      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:43.691173974+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000889s",
      "counterexample": "((E),-1000,-982,-993)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
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    {
      "experiment": "ci-run",
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      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_4"
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      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:43.695038044+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000920s",
      "counterexample": "((E),-991,-990,-996)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
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    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_4"
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      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:43.699007652+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000901s",
      "counterexample": "((E),-987,-986,-1000)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
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      "property": "prop_DeleteInsert",
      "mutations": [
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      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:43.703053691+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000933s",
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      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:44.004071085+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 0,
      "time": "0.000397s",
      "counterexample": "((E),1,0,1)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Correct",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:44.007274199+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 0,
      "time": "0.000454s",
      "counterexample": "((E),-1,1,0)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Correct",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:44.010657092+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 0,
      "time": "0.000409s",
      "counterexample": "((E),1,0,0)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:44.023439650+00:00",
      "status": "Failed",
      "tests": 109,
      "discards": 127,
      "time": "0.001463s",
      "counterexample": "((T (E) 1 1 (E)),(T (T (E) 0 0 (E)) 2 2 (E)),2)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:44.028331329+00:00",
      "status": "Failed",
      "tests": 1507,
      "discards": 1766,
      "time": "0.007054s",
      "counterexample": "((T (E) 0 -1 (E)),(T (E) -1 0 (T (E) 0 0 (E))),0)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:44.038663735+00:00",
      "status": "Failed",
      "tests": 704,
      "discards": 806,
      "time": "0.004981s",
      "counterexample": "((T (E) -1 1 (T (E) 0 0 (E))),(T (T (E) 0 0 (E)) 1 1 (E)),-1)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:44.046839476+00:00",
      "status": "Failed",
      "tests": 131,
      "discards": 165,
      "time": "0.001569s",
      "counterexample": "((T (E) -5 1 (T (T (E) 0 0 (E)) 1 0 (E))),(T (E) -2 -7 (E)),1)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:44.051650717+00:00",
      "status": "Failed",
      "tests": 1405,
      "discards": 1549,
      "time": "0.006967s",
      "counterexample": "((T (T (E) 0 0 (E)) 1 -1 (E)),(T (E) -1 0 (E)),1)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:44.061850650+00:00",
      "status": "Failed",
      "tests": 310,
      "discards": 347,
      "time": "0.002957s",
      "counterexample": "((T (E) 0 -1 (E)),(T (E) -2 0 (T (E) 0 0 (E))),-2)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:44.068215073+00:00",
      "status": "Failed",
      "tests": 23,
      "discards": 33,
      "time": "0.000699s",
      "counterexample": "((T (E) 3 -1 (E)),(T (E) -4 1 (E)),3)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:44.071973011+00:00",
      "status": "Failed",
      "tests": 409,
      "discards": 451,
      "time": "0.003454s",
      "counterexample": "((T (T (E) 0 0 (E)) 2 -2 (E)),(T (E) -1 -1 (E)),2)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:44.078788817+00:00",
      "status": "Failed",
      "tests": 338,
      "discards": 368,
      "time": "0.003133s",
      "counterexample": "((T (T (E) -1 2 (E)) 4 6 (E)),(T (E) 6 1 (E)),4)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:44.085407801+00:00",
      "status": "Failed",
      "tests": 166,
      "discards": 202,
      "time": "0.001889s",
      "counterexample": "((T (E) 0 3 (T (E) 2 2 (E))),(T (E) -10 3 (E)),0)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:44.101526526+00:00",
      "status": "Failed",
      "tests": 2064,
      "discards": 2442,
      "time": "0.399336s",
      "counterexample": "((T (E) -961 -989 (E)),(T (E) -991 -990 (T (T (E) -981 -984 (E)) -972 -981 (E))),-961)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:44.504621557+00:00",
      "status": "Failed",
      "tests": 2765,
      "discards": 3138,
      "time": "0.441046s",
      "counterexample": "((T (E) -1000 -983 (E)),(T (E) -980 -992 (E)),-1000)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:44.949274585+00:00",
      "status": "Failed",
      "tests": 1831,
      "discards": 2072,
      "time": "0.279885s",
      "counterexample": "((T (E) -987 -980 (E)),(T (E) -998 -980 (E)),-987)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:45.232864225+00:00",
      "status": "Failed",
      "tests": 4925,
      "discards": 5880,
      "time": "0.746183s",
      "counterexample": "((T (E) -999 -971 (T (E) -998 -987 (E))),(T (E) -997 -995 (E)),-999)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:45.982853038+00:00",
      "status": "Failed",
      "tests": 10799,
      "discards": 12415,
      "time": "1.643824s",
      "counterexample": "((T (E) -955 -984 (E)),(T (E) -860 -886 (E)),-955)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:47.630775789+00:00",
      "status": "Failed",
      "tests": 10590,
      "discards": 12314,
      "time": "1.734207s",
      "counterexample": "((T (E) -991 -991 (T (E) -983 -981 (E))),(T (E) -966 -963 (E)),-983)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:49.369031554+00:00",
      "status": "Failed",
      "tests": 4202,
      "discards": 4801,
      "time": "0.654440s",
      "counterexample": "((T (E) -988 -995 (E)),(T (E) -980 -996 (E)),-988)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:50.027290428+00:00",
      "status": "Failed",
      "tests": 724,
      "discards": 779,
      "time": "0.105461s",
      "counterexample": "((T (E) -996 -985 (E)),(T (E) -999 -996 (E)),-996)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:50.136414482+00:00",
      "status": "Failed",
      "tests": 2499,
      "discards": 2910,
      "time": "0.373061s",
      "counterexample": "((T (E) -928 -953 (E)),(T (E) -971 -903 (E)),-928)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:50.513093836+00:00",
      "status": "Failed",
      "tests": 53,
      "discards": 50,
      "time": "0.011134s",
      "counterexample": "((T (E) -996 -982 (E)),(T (E) -982 -994 (E)),-996)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:50.540052805+00:00",
      "status": "Failed",
      "tests": 17501,
      "discards": 156254,
      "time": "4.656461s",
      "counterexample": "((T (E) -410 -429 (E)),(T (E) 192 449 (E)),-410)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:55.202093982+00:00",
      "status": "Failed",
      "tests": 17832,
      "discards": 159613,
      "time": "4.715231s",
      "counterexample": "((T (E) 123 -47 (E)),(T (E) -445 -475 (T (E) -330 -75 (E))),123)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:22:59.923136272+00:00",
      "status": "Failed",
      "tests": 5177,
      "discards": 47703,
      "time": "1.422571s",
      "counterexample": "((T (E) -43 -159 (E)),(T (T (E) 110 -148 (E)) 478 -124 (E)),-43)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:23:01.350183901+00:00",
      "status": "Failed",
      "tests": 62987,
      "discards": 564902,
      "time": "16.769917s",
      "counterexample": "((T (E) 67 30 (E)),(T (E) 138 -291 (E)),67)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:23:18.132435549+00:00",
      "status": "Failed",
      "tests": 5514,
      "discards": 49408,
      "time": "1.479136s",
      "counterexample": "((T (E) -87 -64 (T (E) 201 834 (E))),(T (T (E) -313 418 (E)) -225 62 (E)),-87)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:23:19.616122384+00:00",
      "status": "Failed",
      "tests": 20053,
      "discards": 180664,
      "time": "5.356923s",
      "counterexample": "((T (E) -158 -192 (E)),(T (E) 211 -474 (T (E) 694 -82 (E))),-158)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:23:24.978812149+00:00",
      "status": "Failed",
      "tests": 10206,
      "discards": 91814,
      "time": "2.737941s",
      "counterexample": "((T (E) -187 96 (E)),(T (E) -450 738 (T (E) -38 -248 (E))),-450)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:23:27.721540395+00:00",
      "status": "Failed",
      "tests": 15983,
      "discards": 140483,
      "time": "4.157450s",
      "counterexample": "((T (E) -60 151 (E)),(T (T (E) -119 -161 (T (E) 509 -203 (E))) 579 259 (E)),-119)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:23:31.885012381+00:00",
      "status": "Failed",
      "tests": 46495,
      "discards": 418114,
      "time": "12.451487s",
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      "discards": 0,
      "time": "0.000459s",
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      "time": "0.000527s",
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      "time": "0.000449s",
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      "discards": 0,
      "time": "0.000426s",
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      "discards": 0,
      "time": "0.000442s",
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      "time": "0.000443s",
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    {
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      "mode": "solve",
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      "status": "Failed",
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      "time": "0.000390s",
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    {
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      "status": "Failed",
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      "time": "0.000384s",
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    {
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      "mode": "solve",
      "trial": 9,
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      "status": "Failed",
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      "discards": 0,
      "time": "0.000492s",
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    {
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      "property": "prop_UnionDeleteInsert",
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      "trial": 0,
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      "status": "Failed",
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    {
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      "property": "prop_UnionDeleteInsert",
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      "mode": "solve",
      "trial": 1,
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      "status": "Failed",
      "tests": 25,
      "discards": 13,
      "time": "0.000591s",
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    {
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      "property": "prop_UnionDeleteInsert",
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      "trial": 2,
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      "timestamp": "2026-04-30T18:24:45.710379200+00:00",
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      "time": "0.000457s",
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    {
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      "property": "prop_UnionDeleteInsert",
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      "mode": "solve",
      "trial": 3,
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      "status": "Failed",
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      "discards": 0,
      "time": "0.000467s",
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    {
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      "status": "Failed",
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      "discards": 2,
      "time": "0.000434s",
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    {
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      "trial": 6,
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      "status": "Failed",
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      "time": "0.000558s",
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    {
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      "time": "0.000423s",
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    {
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      "status": "Failed",
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      "discards": 0,
      "time": "0.000440s",
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    {
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      "timestamp": "2026-04-30T18:24:45.733635336+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 0,
      "time": "0.000458s",
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    {
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      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
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      "mode": "solve",
      "trial": 0,
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      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.001223s",
      "counterexample": "((T (E) -999 -993 (E)),(E),-965,-993)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
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      "property": "prop_UnionDeleteInsert",
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      "mode": "solve",
      "trial": 1,
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      "timestamp": "2026-04-30T18:24:45.750848377+00:00",
      "status": "Failed",
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      "discards": 0,
      "time": "0.000943s",
      "counterexample": "((T (E) -992 -982 (E)),(E),-965,-994)",
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    },
    {
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      "property": "prop_UnionDeleteInsert",
      "mutations": [
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      "mode": "solve",
      "trial": 2,
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      "timestamp": "2026-04-30T18:24:45.754858416+00:00",
      "status": "Failed",
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      "discards": 1,
      "time": "0.001215s",
      "counterexample": "((T (T (E) -971 -960 (E)) -942 -999 (E)),(E),-925,-932)",
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    },
    {
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      "property": "prop_UnionDeleteInsert",
      "mutations": [
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      "mode": "solve",
      "trial": 3,
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      "timestamp": "2026-04-30T18:24:45.759004183+00:00",
      "status": "Failed",
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      "discards": 0,
      "time": "0.000986s",
      "counterexample": "((T (E) -993 -988 (E)),(E),-989,-982)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
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      "property": "prop_UnionDeleteInsert",
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      "mode": "solve",
      "trial": 4,
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      "timestamp": "2026-04-30T18:24:45.763031505+00:00",
      "status": "Failed",
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      "discards": 0,
      "time": "0.000941s",
      "counterexample": "((T (E) -996 -997 (E)),(E),-986,-978)",
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    },
    {
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      "property": "prop_UnionDeleteInsert",
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      "mode": "solve",
      "trial": 5,
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      "timestamp": "2026-04-30T18:24:45.766822079+00:00",
      "status": "Failed",
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      "discards": 0,
      "time": "0.000930s",
      "counterexample": "((T (E) -1000 -987 (E)),(E),-991,-977)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
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      "property": "prop_UnionDeleteInsert",
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      "mode": "solve",
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      "timestamp": "2026-04-30T18:24:45.770644388+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.000963s",
      "counterexample": "((T (E) -990 -991 (E)),(E),-968,-990)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
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      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
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      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:24:45.774621671+00:00",
      "status": "Failed",
      "tests": 19,
      "discards": 22,
      "time": "0.005350s",
      "counterexample": "((T (E) -680 -945 (E)),(E),-245,-882)",
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    },
    {
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      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
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      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:24:45.783554938+00:00",
      "status": "Failed",
      "tests": 11,
      "discards": 6,
      "time": "0.002910s",
      "counterexample": "((T (E) -844 -810 (E)),(E),-763,-744)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
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      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
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      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:24:45.789728464+00:00",
      "status": "Failed",
      "tests": 4,
      "discards": 1,
      "time": "0.001186s",
      "counterexample": "((T (T (E) -995 -988 (E)) -964 -983 (E)),(T (E) -980 -972 (E)),-987,-996)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
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      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:24:45.805830144+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 17,
      "time": "0.001582s",
      "counterexample": "((T (E) 204 -115 (E)),(T (E) 140 313 (E)),42,29)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:24:45.810833010+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 6,
      "time": "0.000676s",
      "counterexample": "((T (E) -30 -834 (E)),(E),-448,51)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
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    {
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      "time": "0.003825s",
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      "status": "Failed",
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      "time": "0.003642s",
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      "status": "Failed",
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      "time": "0.001296s",
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      "status": "Failed",
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      "status": "Failed",
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      "time": "0.007250s",
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      "time": "0.002455s",
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      "time": "0.000956s",
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      "time": "0.000972s",
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      "time": "0.000962s",
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      "time": "0.000951s",
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      "timestamp": "2026-04-30T18:24:45.979546921+00:00",
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      "time": "0.000393s",
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      "mode": "solve",
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      "timestamp": "2026-04-30T18:24:45.983288151+00:00",
      "status": "Failed",
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      "time": "0.000406s",
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      "time": "0.000482s",
      "counterexample": "((T (T (E) 0 -1 (E)) 2 0 (E)),(E),0,-1)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Correct",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:24:46.148847247+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000413s",
      "counterexample": "((T (E) -1 -2 (E)),(T (E) 2 0 (E)),-2,0)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Correct",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "delete_4"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:24:46.152228466+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 0,
      "time": "0.000474s",
      "counterexample": "((T (E) 1 0 (E)),(E),0,0)",
      "hash": "d0bfc82682859d31a7c63c350aed6c9f40339f7b"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:24:55.913599267+00:00",
      "status": "Failed",
      "tests": 1621,
      "discards": 695,
      "time": "0.005671s",
      "counterexample": "((T (E) -4 -1 (T (E) -1 -1 (E))),-1)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:24:55.922725467+00:00",
      "status": "Failed",
      "tests": 7,
      "discards": 4,
      "time": "0.000470s",
      "counterexample": "((T (E) -1 1 (T (E) 0 0 (E))),0)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Quick",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:24:55.926234744+00:00",
      "status": "Failed",
      "tests": 994,
      "discards": 454,
      "time": "0.004082s",
      "counterexample": "((T (T (E) -1 3 (T (E) 1 -1 (E))) 11 -15 (E)),-1)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:24:55.933734605+00:00",
      "status": "Failed",
      "tests": 171,
      "discards": 85,
      "time": "0.001387s",
      "counterexample": "((T (E) 3 14 (T (E) 4 -2 (E))),4)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Quick",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:24:55.938187274+00:00",
      "status": "Failed",
      "tests": 221,
      "discards": 96,
      "time": "0.001522s",
      "counterexample": "((T (E) -3 1 (T (T (E) 0 0 (E)) 1 0 (E))),0)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Quick",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:24:55.942769625+00:00",
      "status": "Failed",
      "tests": 167,
      "discards": 54,
      "time": "0.001278s",
      "counterexample": "((T (T (E) -3 0 (T (E) -1 -1 (E))) 2 -10 (E)),-1)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:24:55.947042398+00:00",
      "status": "Failed",
      "tests": 627,
      "discards": 315,
      "time": "0.003448s",
      "counterexample": "((T (E) -4 6 (T (T (E) 0 0 (E)) 1 1 (E))),0)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:24:55.953810162+00:00",
      "status": "Failed",
      "tests": 3307,
      "discards": 1471,
      "time": "0.008766s",
      "counterexample": "((T (T (E) 0 0 (E)) 1 1 (E)),0)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:24:55.965947698+00:00",
      "status": "Failed",
      "tests": 414,
      "discards": 176,
      "time": "0.002554s",
      "counterexample": "((T (T (E) 0 0 (E)) 2 3 (E)),0)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:24:55.971734762+00:00",
      "status": "Failed",
      "tests": 304,
      "discards": 145,
      "time": "0.001977s",
      "counterexample": "((T (E) -1 0 (T (E) 0 0 (E))),0)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:24:55.988539075+00:00",
      "status": "Failed",
      "tests": 4431,
      "discards": 2079,
      "time": "0.343372s",
      "counterexample": "((T (T (T (E) -1000 -980 (T (E) -991 -995 (E))) -979 -936 (E)) -913 -997 (E)),-991)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Hedgehog",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:24:56.335779092+00:00",
      "status": "Failed",
      "tests": 515,
      "discards": 228,
      "time": "0.034527s",
      "counterexample": "((T (E) -888 -764 (T (E) -884 -705 (E))),-884)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:24:56.374013867+00:00",
      "status": "Failed",
      "tests": 5367,
      "discards": 2560,
      "time": "0.337661s",
      "counterexample": "((T (E) -950 -754 (T (E) -841 -949 (E))),-841)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:24:56.715486529+00:00",
      "status": "Failed",
      "tests": 17544,
      "discards": 8269,
      "time": "1.083472s",
      "counterexample": "((T (T (T (E) -998 -981 (E)) -990 -925 (E)) -948 -901 (E)),-998)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Hedgehog",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:24:57.802657661+00:00",
      "status": "Failed",
      "tests": 3857,
      "discards": 1868,
      "time": "0.345122s",
      "counterexample": "((T (E) -931 -964 (T (E) -912 -947 (E))),-912)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Hedgehog",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:24:58.151717789+00:00",
      "status": "Failed",
      "tests": 8919,
      "discards": 4189,
      "time": "0.588622s",
      "counterexample": "((T (T (E) -999 -970 (E)) -994 -959 (E)),-999)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Hedgehog",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:24:58.744300644+00:00",
      "status": "Failed",
      "tests": 1914,
      "discards": 895,
      "time": "0.121917s",
      "counterexample": "((T (T (E) -975 -941 (E)) -924 -965 (E)),-975)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Hedgehog",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:24:58.869906236+00:00",
      "status": "Failed",
      "tests": 17647,
      "discards": 8380,
      "time": "1.137160s",
      "counterexample": "((T (E) -984 -702 (T (E) -863 -909 (E))),-863)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Hedgehog",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:25:00.010983242+00:00",
      "status": "Failed",
      "tests": 10640,
      "discards": 5207,
      "time": "0.792995s",
      "counterexample": "((T (T (E) -954 -672 (E)) -588 -691 (E)),-954)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:25:00.807742012+00:00",
      "status": "Failed",
      "tests": 140,
      "discards": 64,
      "time": "0.012172s",
      "counterexample": "((T (T (E) -985 -989 (E)) -969 -983 (E)),-985)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:25:00.835866303+00:00",
      "status": "Failed",
      "tests": 21757,
      "discards": 47078,
      "time": "1.447885s",
      "counterexample": "((T (T (E) -507 -515 (E)) -234 380 (T (E) 68 296 (E))),-507)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:25:02.289532849+00:00",
      "status": "Failed",
      "tests": 23569,
      "discards": 51059,
      "time": "1.556471s",
      "counterexample": "((T (E) -170 -668 (T (E) 261 -78 (E))),261)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:25:03.851553599+00:00",
      "status": "Failed",
      "tests": 12113,
      "discards": 26005,
      "time": "0.792850s",
      "counterexample": "((T (T (E) -43 -127 (E)) 155 18 (T (E) 648 350 (E))),-43)",
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    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:25:04.649019428+00:00",
      "status": "Failed",
      "tests": 17867,
      "discards": 38880,
      "time": "1.193589s",
      "counterexample": "((T (T (E) -97 -624 (E)) 445 -7 (E)),-97)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:25:05.848035756+00:00",
      "status": "Failed",
      "tests": 12141,
      "discards": 25871,
      "time": "0.790054s",
      "counterexample": "((T (E) -40 -632 (T (E) 11 -49 (T (E) 87 -620 (E)))),87)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:25:06.642641982+00:00",
      "status": "Failed",
      "tests": 4871,
      "discards": 10574,
      "time": "0.325629s",
      "counterexample": "((T (T (T (E) -586 428 (E)) -231 59 (E)) -131 -598 (E)),-586)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:25:06.972183441+00:00",
      "status": "Failed",
      "tests": 25007,
      "discards": 54891,
      "time": "1.668763s",
      "counterexample": "((T (T (E) -10 423 (E)) 176 215 (E)),-10)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:25:08.646626837+00:00",
      "status": "Failed",
      "tests": 27617,
      "discards": 58814,
      "time": "1.807881s",
      "counterexample": "((T (E) -131 -96 (T (E) -77 -560 (E))),-77)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:25:10.460416060+00:00",
      "status": "Failed",
      "tests": 88225,
      "discards": 190591,
      "time": "5.864530s",
      "counterexample": "((T (T (E) -397 811 (E)) 80 -92 (T (T (E) 279 36 (E)) 368 -27 (E))),279)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_DeleteModel",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:25:16.338633831+00:00",
      "status": "Failed",
      "tests": 6880,
      "discards": 14894,
      "time": "0.457088s",
      "counterexample": "((T (E) -261 -358 (T (E) 794 -637 (E))),794)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
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    {
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      "time": "0.003418s",
      "counterexample": "((T (T (T (T (E) -98 58 (T (E) -96 49 (E))) -93 -35 (E)) -88 -62 (T (T (T (T (E) -83 24 (E)) -82 -32 (T (E) -81 -72 (E))) -79 2 (T (E) -78 -56 (E))) -75 -62 (T (E) -74 19 (E)))) -73 21 (T (T (T (T (T (T (E) -71 25 (T (T (E) -68 49 (E)) -57 -18 (E))) -56 44 (E)) -55 30 (E)) -54 -69 (T (T (T (T (T (T (E) -52 25 (E)) -51 24 (T (T (E) -46 -42 (E)) -41 41 (E))) -35 53 (E)) -30 -9 (T (E) -21 -97 (T (E) -19 -44 (E)))) -18 68 (T (E) -13 57 (T (E) -12 89 (T (T (E) -11 47 (T (T (E) -10 54 (E)) -8 47 (E))) -7 -17 (T (E) -6 -79 (E)))))) -5 -96 (T (T (T (E) -4 -67 (E)) -2 98 (E)) 1 79 (T (T (E) 7 -46 (E)) 10 -61 (T (T (T (E) 11 -89 (T (T (E) 12 -61 (E)) 14 -56 (T (T (E) 17 62 (E)) 20 38 (T (E) 22 35 (E))))) 25 -15 (E)) 33 89 (T (E) 34 -60 (T (T (E) 36 -51 (E)) 39 -37 (E)))))))) 41 94 (T (T (E) 42 -84 (T (E) 46 75 (E))) 47 44 (T (T (E) 48 -69 (T (T (T (E) 51 34 (T (E) 55 94 (E))) 59 45 (E)) 60 -74 (E))) 63 89 (E)))) 65 58 (T (T (T (T (E) 68 32 (E)) 69 -77 (E)) 70 -23 (T (E) 72 -81 (T (E) 73 -42 (E)))) 77 -17 (T (T (T (T (E) 79 -76 (E)) 80 -94 (T (T (E) 82 -10 (E)) 83 10 (E))) 85 57 (T (T (E) 87 -20 (E)) 89 14 (E))) 91 5 (T (T (E) 92 7 (E)) 96 81 (E)))))),51,51)",
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      "discards": 0,
      "time": "0.004995s",
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      "time": "0.000491s",
      "counterexample": "((T (T (E) -6 2 (T (T (E) 0 3 (E)) 4 10 (E))) 5 -7 (T (E) 7 -3 (T (T (E) 8 5 (E)) 10 -4 (E)))),7,7)",
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      "time": "0.003155s",
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      "time": "0.001807s",
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      "counterexample": "((T (T (T (T (E) -29 -2 (T (E) -25 -25 (E))) -21 -8 (T (T (E) -19 -4 (E)) -18 29 (E))) -13 25 (T (T (T (E) -3 -15 (E)) -2 16 (T (T (E) 2 -20 (E)) 9 9 (E))) 10 -28 (T (E) 14 -6 (E)))) 15 -9 (E)),-19,-19)",
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      "time": "0.001816s",
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      "time": "0.002131s",
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      "status": "Failed",
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      "time": "34.194468s",
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      "timestamp": "2026-04-30T18:30:24.221120993+00:00",
      "status": "Failed",
      "tests": 122489,
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      "time": "9.284913s",
      "counterexample": "((T (T (E) -987 -997 (E)) -964 -963 (E)),-987,-964)",
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      "mode": "solve",
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      "timestamp": "2026-04-30T18:30:33.510087083+00:00",
      "status": "Failed",
      "tests": 356222,
      "discards": 169882,
      "time": "27.447008s",
      "counterexample": "((T (T (E) -991 -1000 (E)) -971 -967 (E)),-991,-971)",
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      "counterexample": "((T (E) -991 -970 (T (E) -984 -984 (E))),-991,-984)",
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      "status": "Failed",
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      "timestamp": "2026-04-30T18:35:23.204527351+00:00",
      "status": "Failed",
      "tests": 114,
      "discards": null,
      "time": "0.000527s",
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      "status": "Failed",
      "tests": 114,
      "discards": null,
      "time": "0.000552s",
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      "discards": 0,
      "time": "0.000391s",
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    {
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      "time": "0.000517s",
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      "tests": 902,
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      "discards": 0,
      "time": "0.012578s",
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      "time": "0.003020s",
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      "timeout": 60.0,
      "timestamp": "2026-04-30T18:35:23.438157429+00:00",
      "status": "Failed",
      "tests": 32,
      "discards": 17,
      "time": "0.000666s",
      "counterexample": "((T (E) 4 3 (E)),10,10,29)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:35:23.441675982+00:00",
      "status": "Failed",
      "tests": 101,
      "discards": 55,
      "time": "0.001085s",
      "counterexample": "((T (E) 0 0 (E)),1,1,1)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:35:23.445818670+00:00",
      "status": "Failed",
      "tests": 101,
      "discards": 48,
      "time": "0.001014s",
      "counterexample": "((T (E) 0 0 (E)),-1,-1,0)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:35:23.449692527+00:00",
      "status": "Failed",
      "tests": 303,
      "discards": 140,
      "time": "0.002270s",
      "counterexample": "((T (E) 0 0 (E)),2,2,-1)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:35:23.468321805+00:00",
      "status": "Failed",
      "tests": 1391,
      "discards": 632,
      "time": "0.097261s",
      "counterexample": "((T (E) -727 -982 (E)),-936,-936,-781)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:35:23.569074830+00:00",
      "status": "Failed",
      "tests": 3008,
      "discards": 1401,
      "time": "0.241373s",
      "counterexample": "((T (T (E) -982 -952 (E)) -979 -998 (E)),-916,-916,-934)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:35:23.814241803+00:00",
      "status": "Failed",
      "tests": 1267,
      "discards": 637,
      "time": "0.096754s",
      "counterexample": "((T (E) -995 -965 (T (E) -989 -1000 (E))),-954,-954,-942)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:35:23.914603334+00:00",
      "status": "Failed",
      "tests": 6,
      "discards": 0,
      "time": "0.001125s",
      "counterexample": "((T (E) -985 -955 (E)),-943,-943,-916)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:35:23.918923047+00:00",
      "status": "Failed",
      "tests": 575,
      "discards": 253,
      "time": "0.057475s",
      "counterexample": "((T (T (T (E) -983 -956 (T (E) -939 -938 (E))) -864 -975 (E)) -709 -978 (E)),-925,-925,-639)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:35:23.979818996+00:00",
      "status": "Failed",
      "tests": 650,
      "discards": 253,
      "time": "0.043452s",
      "counterexample": "((T (E) -980 -994 (E)),-965,-965,-986)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:35:24.026620465+00:00",
      "status": "Failed",
      "tests": 159,
      "discards": 70,
      "time": "0.015598s",
      "counterexample": "((T (E) -723 -976 (E)),-816,-816,-485)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:35:24.045693220+00:00",
      "status": "Failed",
      "tests": 4798,
      "discards": 2208,
      "time": "0.322973s",
      "counterexample": "((T (E) -952 -955 (E)),-929,-929,-940)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:35:24.372400172+00:00",
      "status": "Failed",
      "tests": 1856,
      "discards": 851,
      "time": "0.182660s",
      "counterexample": "((T (E) -980 -963 (T (E) -979 -980 (E))),-886,-886,-1000)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:35:24.558877764+00:00",
      "status": "Failed",
      "tests": 340,
      "discards": 163,
      "time": "0.026937s",
      "counterexample": "((T (E) -985 -986 (E)),-976,-976,-991)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:35:24.603855856+00:00",
      "status": "Failed",
      "tests": 518,
      "discards": 1159,
      "time": "0.040447s",
      "counterexample": "((T (E) 935 38 (E)),-287,-287,20)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:35:24.647983899+00:00",
      "status": "Failed",
      "tests": 3034,
      "discards": 6455,
      "time": "0.216438s",
      "counterexample": "((T (T (E) -260 -267 (E)) 327 -342 (E)),656,656,424)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:35:24.868326102+00:00",
      "status": "Failed",
      "tests": 913,
      "discards": 1953,
      "time": "0.067477s",
      "counterexample": "((T (E) -130 -71 (E)),268,268,-296)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Falsify",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:35:24.939151686+00:00",
      "status": "Failed",
      "tests": 516,
      "discards": 1141,
      "time": "0.040064s",
      "counterexample": "((T (E) 302 320 (E)),-165,-165,-821)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:35:24.982529859+00:00",
      "status": "Failed",
      "tests": 10844,
      "discards": 23169,
      "time": "0.770915s",
      "counterexample": "((T (E) 488 -457 (E)),-4,-4,322)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:35:25.757775308+00:00",
      "status": "Failed",
      "tests": 1420,
      "discards": 3126,
      "time": "0.105799s",
      "counterexample": "((T (E) 760 -646 (E)),513,513,-34)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:35:25.867322245+00:00",
      "status": "Failed",
      "tests": 14664,
      "discards": 31724,
      "time": "1.077893s",
      "counterexample": "((T (E) -184 -756 (E)),-46,-46,-246)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:35:26.949724984+00:00",
      "status": "Failed",
      "tests": 7710,
      "discards": 16544,
      "time": "0.549437s",
      "counterexample": "((T (E) -163 191 (E)),121,121,31)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Falsify",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:35:27.503413572+00:00",
      "status": "Failed",
      "tests": 4846,
      "discards": 10393,
      "time": "0.345038s",
      "counterexample": "((T (E) 0 182 (T (E) 269 453 (T (E) 296 -142 (E)))),44,44,-110)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:35:27.852332048+00:00",
      "status": "Failed",
      "tests": 10719,
      "discards": 22365,
      "time": "0.744686s",
      "counterexample": "((T (E) 70 326 (E)),-294,-294,-232)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Small",
      "property": "DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:35:28.615116658+00:00",
      "status": "timed_out",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "SmallRev",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:28.628833854+00:00",
      "status": "Failed",
      "tests": 9,
      "discards": 7,
      "time": "0.000590s",
      "counterexample": "(0,0,0,(T (E) 1 0 (E)))",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "SmallRev",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:28.632857100+00:00",
      "status": "Failed",
      "tests": 9,
      "discards": 7,
      "time": "0.000494s",
      "counterexample": "(0,0,0,(T (E) 1 0 (E)))",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "SmallRev",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:28.636289763+00:00",
      "status": "Failed",
      "tests": 9,
      "discards": 7,
      "time": "0.000500s",
      "counterexample": "(0,0,0,(T (E) 1 0 (E)))",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "SmallRev",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:28.639710716+00:00",
      "status": "Failed",
      "tests": 9,
      "discards": 7,
      "time": "0.000532s",
      "counterexample": "(0,0,0,(T (E) 1 0 (E)))",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "SmallRev",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:28.643247513+00:00",
      "status": "Failed",
      "tests": 9,
      "discards": 7,
      "time": "0.000540s",
      "counterexample": "(0,0,0,(T (E) 1 0 (E)))",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "SmallRev",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:28.646895449+00:00",
      "status": "Failed",
      "tests": 9,
      "discards": 7,
      "time": "0.000512s",
      "counterexample": "(0,0,0,(T (E) 1 0 (E)))",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "SmallRev",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:28.650372634+00:00",
      "status": "Failed",
      "tests": 9,
      "discards": 7,
      "time": "0.000517s",
      "counterexample": "(0,0,0,(T (E) 1 0 (E)))",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "SmallRev",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:28.653723494+00:00",
      "status": "Failed",
      "tests": 9,
      "discards": 7,
      "time": "0.000478s",
      "counterexample": "(0,0,0,(T (E) 1 0 (E)))",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "SmallRev",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:28.657082920+00:00",
      "status": "Failed",
      "tests": 9,
      "discards": 7,
      "time": "0.000523s",
      "counterexample": "(0,0,0,(T (E) 1 0 (E)))",
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      "timestamp": "2026-04-30T18:36:28.824797094+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 0,
      "time": "0.000393s",
      "counterexample": "((T (E) -1 -1 (E)),1,1,-1)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Correct",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:28.828238495+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 0,
      "time": "0.000411s",
      "counterexample": "((T (E) 0 -1 (E)),1,1,-1)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Correct",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:28.831515738+00:00",
      "status": "Failed",
      "tests": 15,
      "discards": 0,
      "time": "0.000573s",
      "counterexample": "((T (T (T (T (E) -13 5 (T (E) -12 5 (T (E) -9 5 (E)))) 1 9 (T (E) 4 -13 (E))) 5 -12 (T (E) 8 -2 (T (E) 10 -6 (E)))) 12 10 (T (E) 13 5 (E))),1,1,-14)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Correct",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:28.834983526+00:00",
      "status": "Failed",
      "tests": 4,
      "discards": 0,
      "time": "0.000400s",
      "counterexample": "((T (E) 1 -4 (T (E) 3 1 (E))),4,4,0)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Correct",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:28.838285565+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.000432s",
      "counterexample": "((T (T (E) 1 3 (E)) 3 0 (E)),-3,-3,2)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Correct",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:28.841562405+00:00",
      "status": "Failed",
      "tests": 6,
      "discards": 0,
      "time": "0.000452s",
      "counterexample": "((T (T (T (E) -5 -3 (E)) -1 -6 (E)) 0 -4 (T (T (E) 2 -1 (E)) 4 -6 (E))),1,1,5)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Correct",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:28.844801217+00:00",
      "status": "Failed",
      "tests": 107,
      "discards": 0,
      "time": "0.003579s",
      "counterexample": "((T (T (E) -5 -2 (E)) -4 -1 (T (T (E) -1 -5 (T (E) 0 3 (T (E) 1 7 (E)))) 3 3 (T (E) 6 5 (E)))),-3,-3,6)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Correct",
      "property": "prop_DeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:28.851480863+00:00",
      "status": "Failed",
      "tests": 107,
      "discards": 0,
      "time": "0.003138s",
      "counterexample": "((T (T (E) -4 -5 (E)) 0 -7 (E)),3,3,-6)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:28.872106277+00:00",
      "status": "Failed",
      "tests": 1488,
      "discards": 1676,
      "time": "0.007477s",
      "counterexample": "((T (E) 3 20 (T (E) 4 2 (E))),(T (E) 19 18 (E)),19)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:28.882930135+00:00",
      "status": "Failed",
      "tests": 106,
      "discards": 128,
      "time": "0.001432s",
      "counterexample": "((T (E) -1 -1 (E)),(T (T (E) 0 0 (E)) 1 1 (E)),1)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:28.887521634+00:00",
      "status": "Failed",
      "tests": 611,
      "discards": 690,
      "time": "0.004355s",
      "counterexample": "((T (E) 0 -1 (E)),(T (E) 1 2 (E)),1)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:28.895010563+00:00",
      "status": "Failed",
      "tests": 3216,
      "discards": 3565,
      "time": "0.012675s",
      "counterexample": "((T (E) -2 2 (E)),(T (E) -1 1 (E)),-1)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:28.910952107+00:00",
      "status": "Failed",
      "tests": 1407,
      "discards": 1589,
      "time": "0.007016s",
      "counterexample": "((T (E) 0 1 (E)),(T (E) -1 0 (E)),-1)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:28.921148703+00:00",
      "status": "Failed",
      "tests": 1141,
      "discards": 1303,
      "time": "0.006744s",
      "counterexample": "((T (E) -8 -3 (E)),(T (T (T (E) 0 0 (E)) 1 2 (E)) 7 9 (E)),7)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:28.931089474+00:00",
      "status": "Failed",
      "tests": 1616,
      "discards": 1819,
      "time": "0.007801s",
      "counterexample": "((T (E) 1 0 (E)),(T (E) -4 -1 (E)),-4)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:28.942192489+00:00",
      "status": "Failed",
      "tests": 291,
      "discards": 347,
      "time": "0.003097s",
      "counterexample": "((T (E) -19 -19 (E)),(T (T (E) 1 -5 (E)) 16 -6 (E)),16)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:28.948702718+00:00",
      "status": "Failed",
      "tests": 214,
      "discards": 242,
      "time": "0.002291s",
      "counterexample": "((T (E) -2 2 (T (E) 0 0 (E))),(T (E) -3 -3 (T (E) 0 0 (E))),-3)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:28.954182739+00:00",
      "status": "Failed",
      "tests": 204,
      "discards": 246,
      "time": "0.002293s",
      "counterexample": "((T (E) -1 -1 (T (E) 0 0 (E))),(T (T (E) 0 0 (E)) 1 1 (E)),1)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:28.970843741+00:00",
      "status": "Failed",
      "tests": 3249,
      "discards": 3854,
      "time": "0.587623s",
      "counterexample": "((T (E) -981 -994 (E)),(T (E) -982 -995 (E)),-982)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:29.562019689+00:00",
      "status": "Failed",
      "tests": 878,
      "discards": 1052,
      "time": "0.142379s",
      "counterexample": "((T (T (T (T (E) -989 -962 (E)) -935 -873 (E)) -873 -952 (E)) -864 -759 (E)),(T (T (E) -939 -918 (E)) -750 -905 (E)),-750)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:29.708395434+00:00",
      "status": "Failed",
      "tests": 575,
      "discards": 734,
      "time": "0.094381s",
      "counterexample": "((T (E) -962 -921 (E)),(T (E) -930 -959 (E)),-930)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:29.806460475+00:00",
      "status": "Failed",
      "tests": 3445,
      "discards": 3958,
      "time": "0.596605s",
      "counterexample": "((T (E) -984 -998 (E)),(T (E) -990 -984 (E)),-990)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:30.406932089+00:00",
      "status": "Failed",
      "tests": 1055,
      "discards": 1148,
      "time": "0.151024s",
      "counterexample": "((T (E) -987 -998 (E)),(T (E) -984 -989 (E)),-984)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:30.561719345+00:00",
      "status": "Failed",
      "tests": 6577,
      "discards": 7726,
      "time": "1.211947s",
      "counterexample": "((T (E) -991 -982 (E)),(T (E) -984 -983 (E)),-984)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:31.777619443+00:00",
      "status": "Failed",
      "tests": 2834,
      "discards": 3269,
      "time": "0.438571s",
      "counterexample": "((T (E) -987 -998 (E)),(T (E) -984 -984 (E)),-984)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:32.220470910+00:00",
      "status": "Failed",
      "tests": 6273,
      "discards": 7430,
      "time": "1.090734s",
      "counterexample": "((T (E) -985 -995 (E)),(T (E) -986 -984 (E)),-986)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:33.315164721+00:00",
      "status": "Failed",
      "tests": 3963,
      "discards": 4540,
      "time": "0.756018s",
      "counterexample": "((T (E) -989 -992 (E)),(T (E) -985 -992 (E)),-985)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:34.075014577+00:00",
      "status": "Failed",
      "tests": 3498,
      "discards": 4175,
      "time": "0.701206s",
      "counterexample": "((T (T (T (E) -875 -695 (E)) -650 -784 (E)) -222 -278 (E)),(T (E) -516 -539 (E)),-516)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:34.792824210+00:00",
      "status": "Failed",
      "tests": 1687,
      "discards": 14972,
      "time": "0.447975s",
      "counterexample": "((T (E) -591 160 (E)),(T (E) -75 77 (E)),-75)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:35.244614813+00:00",
      "status": "Failed",
      "tests": 7824,
      "discards": 72311,
      "time": "2.152843s",
      "counterexample": "((T (E) 333 168 (E)),(T (E) -471 605 (E)),-471)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:37.401862907+00:00",
      "status": "Failed",
      "tests": 59473,
      "discards": 538464,
      "time": "15.922233s",
      "counterexample": "((T (E) 349 -258 (E)),(T (E) -378 15 (E)),-378)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_DeleteUnion",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:36:53.336580351+00:00",
      "status": "Failed",
      "tests": 64033,
      "discards": 575715,
      "time": "17.038123s",
      "counterexample": "((T (E) 358 -312 (E)),(T (E) -675 266 (T (T (E) 221 -208 (E)) 659 -729 (E))),-675)",
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      "status": "Failed",
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      "discards": 0,
      "time": "0.004703s",
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      "status": "Failed",
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      "discards": 0,
      "time": "0.000430s",
      "counterexample": "((T (T (E) -3 -3 (E)) -2 -1 (T (E) 2 0 (E))),(T (E) 0 -1 (E)),0)",
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      "tests": 41,
      "discards": 0,
      "time": "0.001601s",
      "counterexample": "((T (T (T (E) -39 -25 (T (E) -35 11 (T (E) -34 19 (E)))) -33 19 (T (E) -26 32 (E))) -24 7 (T (T (T (T (T (T (E) -20 -33 (E)) -17 33 (E)) -12 -34 (T (E) -8 5 (T (T (E) -7 9 (E)) -4 40 (T (T (T (E) -1 -41 (E)) 1 -20 (E)) 10 -8 (T (E) 12 -23 (E)))))) 17 -23 (T (E) 18 -31 (E))) 21 -1 (E)) 22 -29 (T (T (E) 25 31 (T (E) 31 1 (E))) 33 25 (T (E) 39 -39 (E))))),(T (T (T (T (E) -34 -5 (E)) -31 36 (T (T (E) -28 41 (E)) -21 -1 (T (E) -10 11 (E)))) 9 28 (E)) 29 2 (T (E) 40 19 (E))),29)",
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      "mode": "solve",
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      "time": "0.000711s",
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      "counterexample": "((T (T (E) -4 -7 (E)) -1 -6 (E)),(T (T (T (E) -5 3 (T (E) -4 -3 (E))) -1 -6 (E)) 3 -2 (T (E) 5 -1 (E))),-1)",
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      "discards": 0,
      "time": "0.000639s",
      "counterexample": "((T (T (E) -16 -6 (E)) -14 -13 (T (T (E) -1 -5 (E)) 0 12 (E))),(T (T (E) -15 -2 (T (E) -12 3 (E))) -11 -7 (T (T (E) -8 2 (T (E) -6 9 (E))) -3 9 (T (T (E) 3 11 (T (E) 7 0 (E))) 14 2 (E)))),-11)",
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      "discards": 0,
      "time": "0.000894s",
      "counterexample": "((T (T (T (T (T (E) -21 -21 (E)) -13 17 (E)) -11 7 (E)) -7 8 (T (T (E) -6 -13 (E)) -1 -16 (E))) 3 -10 (T (T (T (T (E) 4 7 (E)) 6 -16 (T (E) 8 -11 (E))) 10 -18 (T (E) 15 -15 (T (E) 16 -16 (E)))) 18 6 (T (T (E) 19 2 (E)) 22 -20 (E)))),(T (T (T (T (T (E) -22 11 (E)) -20 9 (T (E) -19 22 (E))) -12 18 (T (T (T (E) -11 16 (E)) -8 1 (T (E) -6 11 (E))) -1 -15 (T (E) 0 -2 (E)))) 2 -17 (T (T (T (E) 3 4 (E)) 9 -3 (E)) 12 9 (T (E) 13 -19 (E)))) 14 2 (T (E) 15 -14 (E))),3)",
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      "timestamp": "2026-04-30T18:39:23.002523607+00:00",
      "status": "Failed",
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      "counterexample": "((T (T (T (E) -10 2 (E)) -9 -1 (T (T (E) -8 9 (E)) -4 5 (E))) -2 -5 (T (T (E) 0 8 (E)) 2 -5 (E))),(T (T (T (E) -6 1 (E)) -5 -10 (E)) -3 -6 (T (T (E) 3 -2 (E)) 4 -7 (E))),-3)",
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      "timestamp": "2026-04-30T18:39:23.006169197+00:00",
      "status": "Failed",
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      "discards": 0,
      "time": "0.005698s",
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      "status": "Failed",
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      "discards": 30,
      "time": "0.000884s",
      "counterexample": "((T (T (T (E) 0 0 (E)) 2 -1 (E)) 4 -4 (E)),(E),2,-12)",
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      "status": "Failed",
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      "time": "0.005498s",
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      "status": "Failed",
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      "mode": "solve",
      "trial": 3,
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      "timestamp": "2026-04-30T18:39:23.052513655+00:00",
      "status": "Failed",
      "tests": 205,
      "discards": 272,
      "time": "0.002749s",
      "counterexample": "((T (E) -1 1 (T (E) 0 0 (E))),(T (E) -1 1 (T (E) 0 0 (E))),0,-4)",
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      "mode": "solve",
      "trial": 4,
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      "timestamp": "2026-04-30T18:39:23.058752495+00:00",
      "status": "Failed",
      "tests": 527,
      "discards": 650,
      "time": "0.004290s",
      "counterexample": "((T (E) -6 -6 (T (T (E) 0 0 (E)) 1 -1 (E))),(E),1,22)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:39:23.066544141+00:00",
      "status": "Failed",
      "tests": 712,
      "discards": 821,
      "time": "0.005414s",
      "counterexample": "((T (E) -3 2 (T (E) 0 0 (E))),(E),0,-12)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:39:23.075258889+00:00",
      "status": "Failed",
      "tests": 2098,
      "discards": 2289,
      "time": "0.010107s",
      "counterexample": "((T (T (E) 5 1 (E)) 8 23 (E)),(T (E) 15 18 (E)),5,69)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:39:23.088776393+00:00",
      "status": "Failed",
      "tests": 542,
      "discards": 664,
      "time": "0.004420s",
      "counterexample": "((T (T (E) -2 0 (E)) 3 -4 (E)),(E),-2,-14)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:39:23.096743223+00:00",
      "status": "Failed",
      "tests": 304,
      "discards": 313,
      "time": "0.003201s",
      "counterexample": "((T (T (E) 0 0 (E)) 1 1 (E)),(E),0,-1)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Quick",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:39:23.103454553+00:00",
      "status": "Failed",
      "tests": 148,
      "discards": 190,
      "time": "0.002018s",
      "counterexample": "((T (E) -6 2 (T (E) -3 0 (T (E) 0 0 (E)))),(T (E) 0 -6 (E)),0,7)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:39:23.121764111+00:00",
      "status": "Failed",
      "tests": 13149,
      "discards": 15104,
      "time": "2.331085s",
      "counterexample": "((T (E) -942 -879 (T (T (E) -937 -795 (E)) -899 -786 (E))),(E),-937,-600)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:39:25.457148649+00:00",
      "status": "Failed",
      "tests": 5277,
      "discards": 6128,
      "time": "1.058499s",
      "counterexample": "((T (T (E) -985 -983 (E)) -966 -976 (E)),(E),-985,-952)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:39:26.519338696+00:00",
      "status": "Failed",
      "tests": 1141,
      "discards": 1265,
      "time": "0.212788s",
      "counterexample": "((T (E) -976 -942 (T (E) -972 -971 (E))),(E),-972,-964)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:39:26.736058461+00:00",
      "status": "Failed",
      "tests": 2173,
      "discards": 2531,
      "time": "0.337061s",
      "counterexample": "((T (T (E) -1000 -987 (E)) -987 -973 (T (E) -981 -984 (E))),(E),-1000,-999)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:39:27.076931824+00:00",
      "status": "Failed",
      "tests": 2209,
      "discards": 2598,
      "time": "0.362370s",
      "counterexample": "((T (T (T (E) -988 -989 (E)) -975 -967 (E)) -966 -986 (E)),(E),-975,-955)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:39:27.443042139+00:00",
      "status": "Failed",
      "tests": 3937,
      "discards": 4567,
      "time": "0.666681s",
      "counterexample": "((T (E) -993 -973 (T (E) -989 -984 (E))),(E),-989,-957)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:39:28.113611277+00:00",
      "status": "Failed",
      "tests": 9017,
      "discards": 10399,
      "time": "1.636047s",
      "counterexample": "((T (E) -958 -828 (T (E) -914 -984 (E))),(E),-914,-901)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:39:29.753517644+00:00",
      "status": "Failed",
      "tests": 239,
      "discards": 265,
      "time": "0.048207s",
      "counterexample": "((T (T (E) -994 -995 (E)) -975 -992 (E)),(E),-994,-997)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:39:29.805310198+00:00",
      "status": "Failed",
      "tests": 6045,
      "discards": 6960,
      "time": "1.042184s",
      "counterexample": "((T (T (E) -996 -993 (E)) -976 -972 (E)),(E),-996,-995)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:39:30.851485947+00:00",
      "status": "Failed",
      "tests": 26619,
      "discards": 30686,
      "time": "4.620421s",
      "counterexample": "((T (T (E) -990 -989 (E)) -985 -993 (T (E) -981 -980 (E))),(T (E) -967 -997 (E)),-981,-926)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:39:35.487269215+00:00",
      "status": "Failed",
      "tests": 4368,
      "discards": 39879,
      "time": "1.210952s",
      "counterexample": "((T (T (E) -335 427 (T (E) -190 474 (T (E) 188 617 (E)))) 413 -16 (E)),(E),-335,193)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:39:36.702439362+00:00",
      "status": "Failed",
      "tests": 1196,
      "discards": 10813,
      "time": "0.333818s",
      "counterexample": "((T (T (E) -498 554 (E)) 591 649 (T (E) 726 -512 (E))),(E),726,-672)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:39:37.040013972+00:00",
      "status": "Failed",
      "tests": 6758,
      "discards": 61625,
      "time": "1.853360s",
      "counterexample": "((T (T (E) -652 416 (E)) -173 0 (T (E) -104 265 (E))),(E),-652,605)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:39:38.898310340+00:00",
      "status": "Failed",
      "tests": 58513,
      "discards": 529340,
      "time": "15.931281s",
      "counterexample": "((T (T (T (E) -559 389 (E)) 400 358 (E)) 797 -384 (E)),(E),400,446)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:39:54.841838082+00:00",
      "status": "Failed",
      "tests": 5309,
      "discards": 47706,
      "time": "1.433215s",
      "counterexample": "((T (T (E) -415 -197 (T (T (E) -287 172 (E)) -8 136 (E))) 365 673 (E)),(T (E) 123 -114 (E)),-8,-181)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:39:56.279247041+00:00",
      "status": "Failed",
      "tests": 66127,
      "discards": 594829,
      "time": "17.917307s",
      "counterexample": "((T (E) -141 -549 (T (T (E) 25 -83 (T (E) 101 83 (E))) 194 -248 (T (E) 405 -552 (T (E) 603 -797 (E))))),(E),194,-436)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:40:14.209050749+00:00",
      "status": "Failed",
      "tests": 16724,
      "discards": 151026,
      "time": "4.525446s",
      "counterexample": "((T (T (E) -761 -739 (E)) 166 -409 (E)),(E),-761,-583)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:40:18.740075065+00:00",
      "status": "Failed",
      "tests": 48516,
      "discards": 436797,
      "time": "13.147696s",
      "counterexample": "((T (E) -411 176 (T (E) 416 -68 (E))),(E),416,342)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:40:31.900606734+00:00",
      "status": "Failed",
      "tests": 3723,
      "discards": 33721,
      "time": "1.017553s",
      "counterexample": "((T (E) -646 288 (T (T (E) -394 252 (E)) 353 315 (E))),(T (E) 463 244 (E)),353,-90)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:40:32.922298615+00:00",
      "status": "Failed",
      "tests": 8409,
      "discards": 75678,
      "time": "2.274882s",
      "counterexample": "((T (T (E) -77 -251 (E)) 495 89 (E)),(E),-77,265)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Small",
      "property": "UnionDeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:40:35.217361408+00:00",
      "status": "timed_out",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "SmallRev",
      "property": "UnionDeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:41:35.230800360+00:00",
      "status": "timed_out",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Lean",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:42:35.253069539+00:00",
      "status": "Failed",
      "tests": 310,
      "discards": null,
      "time": "0.000832s",
      "counterexample": "((T (T (E) 0 0 (E)) 1 0 (E)),(E),0,1)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Lean",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:42:35.257480670+00:00",
      "status": "Failed",
      "tests": 310,
      "discards": null,
      "time": "0.000758s",
      "counterexample": "((T (T (E) 0 0 (E)) 1 0 (E)),(E),0,1)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Lean",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:42:35.261464573+00:00",
      "status": "Failed",
      "tests": 310,
      "discards": null,
      "time": "0.000727s",
      "counterexample": "((T (T (E) 0 0 (E)) 1 0 (E)),(E),0,1)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Lean",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:42:35.265340945+00:00",
      "status": "Failed",
      "tests": 310,
      "discards": null,
      "time": "0.000729s",
      "counterexample": "((T (T (E) 0 0 (E)) 1 0 (E)),(E),0,1)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Lean",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "delete_5"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
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      "time": "0.000737s",
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      "discards": null,
      "time": "0.000739s",
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    {
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      "timestamp": "2026-04-30T18:42:35.316100811+00:00",
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      "tests": 250,
      "discards": null,
      "time": "0.000745s",
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    {
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      "mode": "solve",
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      "timestamp": "2026-04-30T18:42:35.320078231+00:00",
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      "tests": 250,
      "discards": null,
      "time": "0.000733s",
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    {
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      "mode": "solve",
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      "timestamp": "2026-04-30T18:42:35.323968462+00:00",
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      "tests": 250,
      "discards": null,
      "time": "0.000726s",
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    {
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      "mode": "solve",
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      "tests": 250,
      "discards": null,
      "time": "0.000701s",
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    {
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      "mode": "solve",
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      "timestamp": "2026-04-30T18:42:35.331541700+00:00",
      "status": "Failed",
      "tests": 250,
      "discards": null,
      "time": "0.000783s",
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      "mode": "solve",
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      "status": "Failed",
      "tests": 250,
      "discards": null,
      "time": "0.000757s",
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      "timestamp": "2026-04-30T18:42:35.339197852+00:00",
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      "tests": 250,
      "discards": null,
      "time": "0.000740s",
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    {
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      "tests": 0,
      "discards": 0,
      "time": "0.000475s",
      "counterexample": "Exception thrown while showing test case: 'BSTSIZE: getEnv: does not exist (no environment variable)'",
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    {
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      "discards": 0,
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      "discards": 0,
      "time": "0.000416s",
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    {
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      "time": "0.000396s",
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    {
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      "discards": 0,
      "time": "0.000458s",
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    {
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      "discards": 0,
      "time": "0.000400s",
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    {
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      "discards": 0,
      "time": "0.000408s",
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    {
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      "property": "prop_UnionDeleteInsert",
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      "mode": "solve",
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      "discards": 0,
      "time": "0.000435s",
      "counterexample": "Exception thrown while showing test case: 'BSTSIZE: getEnv: does not exist (no environment variable)'",
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    {
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      "mode": "solve",
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      "timestamp": "2026-04-30T18:42:35.381868191+00:00",
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      "tests": 0,
      "discards": 0,
      "time": "0.000398s",
      "counterexample": "Exception thrown while showing test case: 'BSTSIZE: getEnv: does not exist (no environment variable)'",
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    {
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      "mode": "solve",
      "trial": 9,
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      "timestamp": "2026-04-30T18:42:35.385098917+00:00",
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      "discards": 0,
      "time": "0.000413s",
      "counterexample": "Exception thrown while showing test case: 'BSTSIZE: getEnv: does not exist (no environment variable)'",
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    {
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      "status": "Failed",
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      "discards": 0,
      "time": "0.000567s",
      "counterexample": "((T (T (E) -6 -6 (E)) -5 -5 (T (T (T (E) -4 -1 (E)) -2 1 (E)) 5 -3 (E))),(T (T (T (E) -6 -2 (T (E) -3 -1 (E))) 0 -4 (T (E) 2 -2 (E))) 4 -5 (T (E) 5 4 (E))),-6,1)",
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        "delete_5"
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      "mode": "solve",
      "trial": 1,
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      "timestamp": "2026-04-30T18:42:35.403800468+00:00",
      "status": "Failed",
      "tests": 28,
      "discards": 0,
      "time": "0.001180s",
      "counterexample": "((T (T (T (T (E) -27 -27 (T (E) -23 -15 (E))) -22 20 (T (T (E) -16 7 (E)) -13 -3 (E))) -11 -9 (E)) -10 24 (T (T (T (T (T (E) -9 21 (E)) -8 -22 (T (T (E) -7 -3 (T (T (T (E) -5 4 (E)) -1 3 (E)) 3 -22 (E))) 6 -9 (E))) 15 -9 (T (E) 19 -7 (E))) 22 -9 (E)) 23 11 (E))),(T (T (T (E) -25 -13 (E)) -14 -20 (T (T (E) -8 -16 (T (E) 0 -17 (T (E) 12 2 (E)))) 14 -18 (E))) 15 -8 (T (E) 16 20 (E))),-16,4)",
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    {
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      "property": "prop_UnionDeleteInsert",
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      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:42:35.408032833+00:00",
      "status": "Failed",
      "tests": 12,
      "discards": 0,
      "time": "0.000594s",
      "counterexample": "((T (T (T (T (T (T (E) -12 7 (E)) -10 11 (E)) -8 -11 (T (T (E) -6 9 (E)) -4 3 (E))) 0 -5 (E)) 4 10 (E)) 8 -5 (T (E) 10 5 (E))),(T (T (T (E) -12 -3 (E)) -5 3 (T (E) -1 -1 (T (E) 7 -11 (E)))) 9 12 (E)),-10,1)",
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      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "delete_5"
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      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:42:35.411529762+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.000450s",
      "counterexample": "((T (T (T (E) -3 -3 (E)) -1 1 (E)) 3 0 (E)),(T (E) 2 3 (E)),-3,-2)",
      "hash": "1f9646a9688662355ad8b03a8a90fcca0423a504"
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      "property": "prop_UnionDeleteInsert",
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      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:42:35.414913935+00:00",
      "status": "Failed",
      "tests": 9,
      "discards": 0,
      "time": "0.000490s",
      "counterexample": "((T (E) -9 5 (T (E) -6 5 (T (T (E) -5 -3 (E)) -2 4 (T (E) 4 -4 (T (E) 7 -2 (T (E) 9 4 (E))))))),(T (E) -4 -7 (T (E) 3 7 (E))),7,-4)",
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      "property": "prop_UnionDeleteInsert",
      "mutations": [
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      "mode": "solve",
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      "time": "0.000526s",
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      "time": "0.000555s",
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      "time": "0.000635s",
      "counterexample": "((T (T (E) -11 1 (T (E) -8 -7 (E))) -5 -5 (T (T (T (E) -2 -6 (E)) 1 -6 (T (T (E) 2 6 (E)) 4 -11 (E))) 6 9 (T (E) 11 -4 (E)))),(T (T (E) -8 9 (E)) 5 8 (T (T (E) 7 9 (E)) 8 -8 (E))),11,7)",
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      "time": "0.000411s",
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      "time": "0.000381s",
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      "discards": 93,
      "time": "0.000971s",
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      "time": "0.000750s",
      "counterexample": "((T (E) -5 11 (T (T (E) 0 0 (E)) 3 -2 (E))),(T (E) -10 3 (T (T (E) 0 0 (E)) 2 0 (E))))",
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      "time": "0.000471s",
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      "time": "0.000732s",
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      "tests": 41,
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      "time": "0.000698s",
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      "tests": 1223,
      "discards": 586,
      "time": "0.005114s",
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      "discards": 57,
      "time": "0.001175s",
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      "time": "0.000936s",
      "counterexample": "((T (E) 22 9 (E)),(T (T (E) -4 -2 (E)) -17 -10 (T (E) -4 0 (T (T (E) 0 0 (E)) -1 0 (E)))),-1)",
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      "tests": 951,
      "discards": 453,
      "time": "0.004044s",
      "counterexample": "((T (T (E) -1 1 (T (E) 0 0 (E))) 11 4 (E)),(T (T (E) 1 3 (T (E) 0 0 (E))) 8 9 (E)),1)",
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      "discards": 189,
      "time": "0.002568s",
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      "tests": 249,
      "discards": 125,
      "time": "0.001849s",
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      "tests": 2181,
      "discards": 982,
      "time": "0.006787s",
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      "mode": "solve",
      "trial": 9,
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      "tests": 591,
      "discards": 253,
      "time": "0.003393s",
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      "time": "0.286483s",
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      "time": "0.216965s",
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      "time": "0.077531s",
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      "time": "0.032125s",
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      "time": "0.166877s",
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      "tests": 1784,
      "discards": 3906,
      "time": "0.152008s",
      "counterexample": "((T (T (E) -430 179 (E)) 618 -277 (E)),(T (E) -515 567 (T (T (T (E) 506 -439 (E)) 38 40 (E)) -445 126 (T (T (E) -355 -454 (T (E) 99 774 (E))) 391 79 (T (E) 404 -17 (T (T (T (E) -761 -64 (E)) 98 119 (T (E) 276 340 (T (E) -634 -126 (E)))) 860 -253 (E)))))),391)",
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      "time": "0.008127s",
      "counterexample": "((T (E) 0 0 (E)),(T (E) 0 0 (E)),0)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
    },
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      "experiment": "ci-run",
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      "strategy": "Quick",
      "property": "prop_DeleteUnion",
      "mutations": [
        "union_6"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:43:56.831520394+00:00",
      "status": "Failed",
      "tests": 411,
      "discards": 481,
      "time": "0.003644s",
      "counterexample": "((T (E) 0 2 (E)),(T (E) -2 0 (E)),-2)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
    },
    {
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      "strategy": "Hedgehog",
      "property": "prop_DeleteUnion",
      "mutations": [
        "union_6"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:43:56.854087690+00:00",
      "status": "Failed",
      "tests": 751,
      "discards": 853,
      "time": "0.111986s",
      "counterexample": "((T (E) -963 -994 (E)),(T (T (E) -987 -997 (E)) -984 -987 (E)),-987)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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    {
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      "property": "prop_DeleteUnion",
      "mutations": [
        "union_6"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:43:56.969804734+00:00",
      "status": "Failed",
      "tests": 3106,
      "discards": 3700,
      "time": "0.632153s",
      "counterexample": "((T (T (T (E) -990 -987 (E)) -987 -996 (E)) -960 -987 (E)),(T (E) -986 -948 (T (T (E) -980 -995 (E)) -979 -990 (E))),-986)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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      "strategy": "Hedgehog",
      "property": "prop_DeleteUnion",
      "mutations": [
        "union_6"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:43:57.605943923+00:00",
      "status": "Failed",
      "tests": 851,
      "discards": 953,
      "time": "0.125222s",
      "counterexample": "((T (T (E) -992 -989 (E)) -982 -961 (E)),(T (E) -982 -962 (E)),-982)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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      "strategy": "Hedgehog",
      "property": "prop_DeleteUnion",
      "mutations": [
        "union_6"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:43:57.735072157+00:00",
      "status": "Failed",
      "tests": 1049,
      "discards": 1259,
      "time": "0.214442s",
      "counterexample": "((T (E) -983 -980 (E)),(T (T (E) -999 -995 (T (E) -996 -986 (E))) -981 -936 (E)),-996)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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      "strategy": "Hedgehog",
      "property": "prop_DeleteUnion",
      "mutations": [
        "union_6"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:43:57.953181449+00:00",
      "status": "Failed",
      "tests": 6303,
      "discards": 7330,
      "time": "1.059728s",
      "counterexample": "((T (T (E) -994 -794 (E)) -600 -901 (E)),(T (T (E) -773 -920 (E)) -723 -801 (E)),-773)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_DeleteUnion",
      "mutations": [
        "union_6"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:43:59.016771022+00:00",
      "status": "Failed",
      "tests": 93,
      "discards": 110,
      "time": "0.017332s",
      "counterexample": "((T (E) -982 -1000 (E)),(T (E) -987 -995 (E)),-987)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_DeleteUnion",
      "mutations": [
        "union_6"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:43:59.037888954+00:00",
      "status": "Failed",
      "tests": 13978,
      "discards": 16025,
      "time": "2.424858s",
      "counterexample": "((T (E) -994 -996 (E)),(T (E) -994 -985 (E)),-994)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_DeleteUnion",
      "mutations": [
        "union_6"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:44:01.466596618+00:00",
      "status": "Failed",
      "tests": 2604,
      "discards": 2901,
      "time": "0.505184s",
      "counterexample": "((T (T (E) -999 -992 (E)) -967 -994 (E)),(T (T (E) -992 -991 (E)) -988 -986 (E)),-988)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_DeleteUnion",
      "mutations": [
        "union_6"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:44:01.975463408+00:00",
      "status": "Failed",
      "tests": 603,
      "discards": 700,
      "time": "0.105572s",
      "counterexample": "((T (E) -980 -994 (E)),(T (E) -1000 -997 (E)),-1000)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_DeleteUnion",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:44:02.085094602+00:00",
      "status": "Failed",
      "tests": 2098,
      "discards": 2307,
      "time": "0.400360s",
      "counterexample": "((T (E) -997 -979 (T (E) -981 -992 (E))),(T (E) -991 -997 (E)),-981)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Falsify",
      "property": "prop_DeleteUnion",
      "mutations": [
        "union_6"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:44:02.506080700+00:00",
      "status": "Failed",
      "tests": 57161,
      "discards": 514844,
      "time": "14.957020s",
      "counterexample": "((T (E) 621 -243 (E)),(T (E) 265 -135 (E)),265)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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    {
      "experiment": "ci-run",
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      "property": "prop_DeleteUnion",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:44:17.475847467+00:00",
      "status": "Failed",
      "tests": 9193,
      "discards": 81783,
      "time": "2.373442s",
      "counterexample": "((T (E) 691 259 (E)),(T (E) -23 631 (E)),-23)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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      "experiment": "ci-run",
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      "property": "prop_DeleteUnion",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:44:19.853898788+00:00",
      "status": "Failed",
      "tests": 7761,
      "discards": 70437,
      "time": "2.064109s",
      "counterexample": "((T (E) 210 -452 (T (E) 593 167 (E))),(T (E) -480 136 (T (T (E) -196 -133 (E)) 161 301 (E))),-196)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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    {
      "experiment": "ci-run",
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      "property": "prop_DeleteUnion",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:44:21.922855663+00:00",
      "status": "Failed",
      "tests": 124803,
      "discards": 1123323,
      "time": "32.670252s",
      "counterexample": "((T (E) 327 2 (E)),(T (E) -232 -323 (E)),-232)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
    },
    {
      "experiment": "ci-run",
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      "property": "prop_DeleteUnion",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:44:54.614732320+00:00",
      "status": "Failed",
      "tests": 25142,
      "discards": 224367,
      "time": "6.493799s",
      "counterexample": "((T (E) 467 -180 (E)),(T (E) -165 -153 (E)),-165)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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    {
      "experiment": "ci-run",
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      "property": "prop_DeleteUnion",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:45:01.116299244+00:00",
      "status": "Failed",
      "tests": 28903,
      "discards": 259658,
      "time": "7.602870s",
      "counterexample": "((T (E) -457 -21 (E)),(T (E) -609 -435 (E)),-609)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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      "property": "prop_DeleteUnion",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:45:08.727389128+00:00",
      "status": "Failed",
      "tests": 110369,
      "discards": 985214,
      "time": "28.679923s",
      "counterexample": "((T (E) -171 -226 (E)),(T (T (E) -806 -98 (T (E) -620 633 (E))) 12 764 (E)),-620)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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      "property": "prop_DeleteUnion",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:45:37.428008177+00:00",
      "status": "Failed",
      "tests": 37270,
      "discards": 335528,
      "time": "9.748530s",
      "counterexample": "((T (E) -636 69 (E)),(T (T (E) -652 455 (E)) -261 -312 (E)),-652)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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      "property": "prop_DeleteUnion",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:45:47.184581937+00:00",
      "status": "Failed",
      "tests": 57392,
      "discards": 513441,
      "time": "14.911869s",
      "counterexample": "((T (T (E) -319 87 (T (E) 83 257 (T (T (E) 174 428 (E)) 305 224 (E)))) 624 -376 (E)),(T (E) 439 51 (E)),439)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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    {
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      "property": "prop_DeleteUnion",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:02.108622695+00:00",
      "status": "Failed",
      "tests": 81918,
      "discards": 737010,
      "time": "21.336691s",
      "counterexample": "((T (E) 482 270 (E)),(T (T (E) 139 786 (E)) 804 9 (E)),139)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
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      "strategy": "Small",
      "property": "prop_DeleteUnion",
      "mutations": [
        "union_6"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:23.470194262+00:00",
      "status": "Failed",
      "tests": 28,
      "discards": 3,
      "time": "0.000703s",
      "counterexample": "((T (E) 0 0 (E)),(T (E) 0 0 (E)),0)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_DeleteUnion",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:23.474335787+00:00",
      "status": "Failed",
      "tests": 28,
      "discards": 3,
      "time": "0.000707s",
      "counterexample": "((T (E) 0 0 (E)),(T (E) 0 0 (E)),0)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_DeleteUnion",
      "mutations": [
        "union_6"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:23.478117342+00:00",
      "status": "Failed",
      "tests": 28,
      "discards": 3,
      "time": "0.000667s",
      "counterexample": "((T (E) 0 0 (E)),(T (E) 0 0 (E)),0)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_DeleteUnion",
      "mutations": [
        "union_6"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:23.481648666+00:00",
      "status": "Failed",
      "tests": 28,
      "discards": 3,
      "time": "0.000631s",
      "counterexample": "((T (E) 0 0 (E)),(T (E) 0 0 (E)),0)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_DeleteUnion",
      "mutations": [
        "union_6"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:23.485171016+00:00",
      "status": "Failed",
      "tests": 28,
      "discards": 3,
      "time": "0.000814s",
      "counterexample": "((T (E) 0 0 (E)),(T (E) 0 0 (E)),0)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_DeleteUnion",
      "mutations": [
        "union_6"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:23.488857350+00:00",
      "status": "Failed",
      "tests": 28,
      "discards": 3,
      "time": "0.000611s",
      "counterexample": "((T (E) 0 0 (E)),(T (E) 0 0 (E)),0)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_DeleteUnion",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:23.492553974+00:00",
      "status": "Failed",
      "tests": 28,
      "discards": 3,
      "time": "0.000709s",
      "counterexample": "((T (E) 0 0 (E)),(T (E) 0 0 (E)),0)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_DeleteUnion",
      "mutations": [
        "union_6"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:23.496052228+00:00",
      "status": "Failed",
      "tests": 28,
      "discards": 3,
      "time": "0.000652s",
      "counterexample": "((T (E) 0 0 (E)),(T (E) 0 0 (E)),0)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "prop_DeleteUnion",
      "mutations": [
        "union_6"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:23.499623269+00:00",
      "status": "Failed",
      "tests": 28,
      "discards": 3,
      "time": "0.000651s",
      "counterexample": "((T (E) 0 0 (E)),(T (E) 0 0 (E)),0)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
    },
    {
      "experiment": "ci-run",
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      "property": "prop_DeleteUnion",
      "mutations": [
        "union_6"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:23.503101334+00:00",
      "status": "Failed",
      "tests": 28,
      "discards": 3,
      "time": "0.000692s",
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      "time": "0.000415s",
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      "time": "0.000444s",
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      "time": "0.000397s",
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      "time": "0.000417s",
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      "time": "0.000549s",
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      "discards": 0,
      "time": "0.000504s",
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      "discards": 0,
      "time": "0.000473s",
      "counterexample": "((T (T (T (E) -5 2 (T (E) -3 3 (E))) 0 -4 (E)) 3 0 (T (T (E) 4 2 (E)) 6 2 (E))),(T (T (E) -2 -4 (E)) 4 1 (E)),6)",
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      "mode": "solve",
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      "time": "0.000499s",
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      "status": "Failed",
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      "status": "Failed",
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      "time": "0.000410s",
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      "timestamp": "2026-04-30T18:46:23.809684335+00:00",
      "status": "Failed",
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      "discards": 0,
      "time": "0.001050s",
      "counterexample": "((E),(T (E) -999 -995 (E)),-968,-993)",
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      "mode": "solve",
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      "status": "Failed",
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      "discards": 0,
      "time": "0.001048s",
      "counterexample": "((E),(T (T (E) -996 -995 (E)) -960 -984 (E)),-991,-928)",
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      "mode": "solve",
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      "timestamp": "2026-04-30T18:46:23.818578701+00:00",
      "status": "Failed",
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      "discards": 0,
      "time": "0.001116s",
      "counterexample": "((T (E) -998 -997 (E)),(T (E) -981 -986 (E)),-970,-972)",
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      "property": "prop_InsertUnion",
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      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:23.822533835+00:00",
      "status": "Failed",
      "tests": 14,
      "discards": 9,
      "time": "0.003493s",
      "counterexample": "((E),(T (E) -986 -993 (T (E) -879 -869 (E))),-887,-642)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
    },
    {
      "experiment": "ci-run",
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      "language": "Haskell",
      "strategy": "Hedgehog",
      "property": "prop_InsertUnion",
      "mutations": [
        "union_6"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:23.828904446+00:00",
      "status": "Failed",
      "tests": 5,
      "discards": 5,
      "time": "0.001676s",
      "counterexample": "((E),(T (E) -997 -901 (T (E) -965 -987 (E))),-950,-909)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertUnion",
      "mutations": [
        "union_6"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:23.833495222+00:00",
      "status": "Failed",
      "tests": 7,
      "discards": 3,
      "time": "0.001569s",
      "counterexample": "((E),(T (E) -978 -930 (E)),-862,-981)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertUnion",
      "mutations": [
        "union_6"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:23.837908263+00:00",
      "status": "Failed",
      "tests": 4,
      "discards": 1,
      "time": "0.001336s",
      "counterexample": "((E),(T (T (E) -989 -983 (E)) -985 -975 (E)),-956,-972)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
    },
    {
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      "strategy": "Hedgehog",
      "property": "prop_InsertUnion",
      "mutations": [
        "union_6"
      ],
      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:23.842169221+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.000932s",
      "counterexample": "((E),(T (E) -993 -981 (E)),-974,-987)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
    },
    {
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      "strategy": "Hedgehog",
      "property": "prop_InsertUnion",
      "mutations": [
        "union_6"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:23.845968840+00:00",
      "status": "Failed",
      "tests": 4,
      "discards": 0,
      "time": "0.001024s",
      "counterexample": "((E),(T (T (E) -986 -986 (E)) -975 -981 (E)),-967,-953)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_InsertUnion",
      "mutations": [
        "union_6"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:23.849884572+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.000912s",
      "counterexample": "((E),(T (E) -983 -995 (E)),-971,-963)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
    },
    {
      "experiment": "ci-run",
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      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_InsertUnion",
      "mutations": [
        "union_6"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:23.868521352+00:00",
      "status": "Failed",
      "tests": 23,
      "discards": 163,
      "time": "0.007872s",
      "counterexample": "((E),(T (T (E) -352 353 (E)) 420 774 (E)),27,315)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
    },
    {
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      "strategy": "Falsify",
      "property": "prop_InsertUnion",
      "mutations": [
        "union_6"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:23.879602908+00:00",
      "status": "Failed",
      "tests": 8,
      "discards": 104,
      "time": "0.005663s",
      "counterexample": "((T (E) -103 -243 (E)),(T (T (E) -97 -61 (E)) 441 73 (E)),577,-669)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
    },
    {
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      "strategy": "Falsify",
      "property": "prop_InsertUnion",
      "mutations": [
        "union_6"
      ],
      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:23.888404157+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 36,
      "time": "0.002854s",
      "counterexample": "((E),(T (E) -757 501 (E)),163,-429)",
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    },
    {
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      "strategy": "Falsify",
      "property": "prop_InsertUnion",
      "mutations": [
        "union_6"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:23.894417838+00:00",
      "status": "Failed",
      "tests": 9,
      "discards": 99,
      "time": "0.005616s",
      "counterexample": "((T (E) -204 -621 (E)),(T (E) 339 -552 (E)),619,-294)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Falsify",
      "property": "prop_InsertUnion",
      "mutations": [
        "union_6"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:23.903046594+00:00",
      "status": "Failed",
      "tests": 6,
      "discards": 31,
      "time": "0.002515s",
      "counterexample": "((E),(T (E) 289 130 (T (E) 395 -54 (E))),443,-524)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
    },
    {
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      "property": "prop_InsertUnion",
      "mutations": [
        "union_6"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:23.908650775+00:00",
      "status": "Failed",
      "tests": 6,
      "discards": 61,
      "time": "0.003709s",
      "counterexample": "((E),(T (E) -94 185 (T (E) 338 39 (E))),-76,74)",
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      "property": "prop_InsertUnion",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:23.915331470+00:00",
      "status": "Failed",
      "tests": 7,
      "discards": 34,
      "time": "0.002785s",
      "counterexample": "((E),(T (E) -259 -75 (E)),-29,106)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
    },
    {
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      "property": "prop_InsertUnion",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:23.921236545+00:00",
      "status": "Failed",
      "tests": 10,
      "discards": 49,
      "time": "0.003791s",
      "counterexample": "((T (E) -150 304 (E)),(T (E) -472 280 (E)),117,-842)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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      "property": "prop_InsertUnion",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:23.928097844+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 11,
      "time": "0.001102s",
      "counterexample": "((E),(T (E) -380 428 (T (E) 509 -169 (E))),473,-672)",
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    },
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      "property": "prop_InsertUnion",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:23.932235863+00:00",
      "status": "Failed",
      "tests": 5,
      "discards": 52,
      "time": "0.003674s",
      "counterexample": "((E),(T (E) -147 -58 (T (E) -66 -588 (E))),325,499)",
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      "strategy": "Small",
      "property": "prop_InsertUnion",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:23.952043437+00:00",
      "status": "Failed",
      "tests": 7,
      "discards": 0,
      "time": "0.000308s",
      "counterexample": "((E),(T (E) 0 0 (E)),0,0)",
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    },
    {
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      "strategy": "Small",
      "property": "prop_InsertUnion",
      "mutations": [
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      "mode": "solve",
      "trial": 1,
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      "timestamp": "2026-04-30T18:46:23.955464528+00:00",
      "status": "Failed",
      "tests": 7,
      "discards": 0,
      "time": "0.000316s",
      "counterexample": "((E),(T (E) 0 0 (E)),0,0)",
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    },
    {
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      "property": "prop_InsertUnion",
      "mutations": [
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      "mode": "solve",
      "trial": 2,
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      "timestamp": "2026-04-30T18:46:23.958709037+00:00",
      "status": "Failed",
      "tests": 7,
      "discards": 0,
      "time": "0.000271s",
      "counterexample": "((E),(T (E) 0 0 (E)),0,0)",
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    {
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      "property": "prop_InsertUnion",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 3,
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      "timestamp": "2026-04-30T18:46:23.961762721+00:00",
      "status": "Failed",
      "tests": 7,
      "discards": 0,
      "time": "0.000289s",
      "counterexample": "((E),(T (E) 0 0 (E)),0,0)",
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    },
    {
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      "property": "prop_InsertUnion",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 4,
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      "timestamp": "2026-04-30T18:46:23.964831702+00:00",
      "status": "Failed",
      "tests": 7,
      "discards": 0,
      "time": "0.000268s",
      "counterexample": "((E),(T (E) 0 0 (E)),0,0)",
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    {
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      "property": "prop_InsertUnion",
      "mutations": [
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      "mode": "solve",
      "trial": 5,
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      "timestamp": "2026-04-30T18:46:23.967973251+00:00",
      "status": "Failed",
      "tests": 7,
      "discards": 0,
      "time": "0.000284s",
      "counterexample": "((E),(T (E) 0 0 (E)),0,0)",
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    {
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      "property": "prop_InsertUnion",
      "mutations": [
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      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:23.971071075+00:00",
      "status": "Failed",
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      "discards": 0,
      "time": "0.000265s",
      "counterexample": "((E),(T (E) 0 0 (E)),0,0)",
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    {
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      "property": "prop_InsertUnion",
      "mutations": [
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      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:23.974027428+00:00",
      "status": "Failed",
      "tests": 7,
      "discards": 0,
      "time": "0.000274s",
      "counterexample": "((E),(T (E) 0 0 (E)),0,0)",
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      "strategy": "Small",
      "property": "prop_InsertUnion",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:23.977201175+00:00",
      "status": "Failed",
      "tests": 7,
      "discards": 0,
      "time": "0.000272s",
      "counterexample": "((E),(T (E) 0 0 (E)),0,0)",
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    {
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      "property": "prop_InsertUnion",
      "mutations": [
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      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:23.980298461+00:00",
      "status": "Failed",
      "tests": 7,
      "discards": 0,
      "time": "0.000266s",
      "counterexample": "((E),(T (E) 0 0 (E)),0,0)",
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    {
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      "language": "Haskell",
      "strategy": "SmallRev",
      "property": "prop_InsertUnion",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:23.996544483+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000230s",
      "counterexample": "(0,0,(E),(T (E) 0 0 (E)))",
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      "property": "prop_InsertUnion",
      "mutations": [
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      "mode": "solve",
      "trial": 1,
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      "timestamp": "2026-04-30T18:46:23.999882451+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000217s",
      "counterexample": "(0,0,(E),(T (E) 0 0 (E)))",
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      "property": "prop_InsertUnion",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.002954923+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000208s",
      "counterexample": "(0,0,(E),(T (E) 0 0 (E)))",
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      "strategy": "SmallRev",
      "property": "prop_InsertUnion",
      "mutations": [
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      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.006102970+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000204s",
      "counterexample": "(0,0,(E),(T (E) 0 0 (E)))",
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      "strategy": "SmallRev",
      "property": "prop_InsertUnion",
      "mutations": [
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      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.009130026+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000201s",
      "counterexample": "(0,0,(E),(T (E) 0 0 (E)))",
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    {
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      "strategy": "SmallRev",
      "property": "prop_InsertUnion",
      "mutations": [
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      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.012150214+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
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      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
    },
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      "strategy": "Size",
      "property": "prop_InsertUnion",
      "mutations": [
        "union_6"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.166554553+00:00",
      "status": "Failed",
      "tests": 0,
      "discards": 0,
      "time": "0.000464s",
      "counterexample": "Exception thrown while showing test case: 'BSTSIZE: getEnv: does not exist (no environment variable)'",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
    },
    {
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      "strategy": "Correct",
      "property": "prop_InsertUnion",
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        "union_6"
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      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.186499829+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000482s",
      "counterexample": "((E),(T (T (E) -2 0 (E)) -1 -1 (E)),2,0)",
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      "property": "prop_InsertUnion",
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      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.190108819+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.000419s",
      "counterexample": "((T (T (E) -2 -2 (E)) -1 -1 (E)),(T (T (E) -3 1 (T (E) -1 0 (E))) 1 1 (E)),3,-2)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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      "property": "prop_InsertUnion",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.193484195+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.000446s",
      "counterexample": "((T (E) -3 -2 (E)),(T (E) -2 0 (E)),-2,-1)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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    {
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      "property": "prop_InsertUnion",
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        "union_6"
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      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.196843502+00:00",
      "status": "Failed",
      "tests": 6,
      "discards": 0,
      "time": "0.000442s",
      "counterexample": "((E),(T (T (T (E) -6 3 (E)) -4 -1 (E)) 3 2 (E)),4,5)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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    {
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      "strategy": "Correct",
      "property": "prop_InsertUnion",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.200120450+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.000399s",
      "counterexample": "((T (E) -2 -1 (T (E) 0 -2 (T (E) 3 0 (E)))),(T (E) -2 3 (T (E) 0 -2 (E))),3,0)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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      "strategy": "Correct",
      "property": "prop_InsertUnion",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 5,
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      "timestamp": "2026-04-30T18:46:24.203384428+00:00",
      "status": "Failed",
      "tests": 6,
      "discards": 0,
      "time": "0.000504s",
      "counterexample": "((T (E) -6 1 (T (E) -3 0 (E))),(T (T (E) -6 0 (E)) -5 -3 (T (E) 0 -2 (T (E) 6 -5 (E)))),3,4)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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    {
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      "strategy": "Correct",
      "property": "prop_InsertUnion",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.206725406+00:00",
      "status": "Failed",
      "tests": 9,
      "discards": 0,
      "time": "0.000474s",
      "counterexample": "((T (T (E) -8 2 (T (E) -4 -2 (E))) -1 0 (T (E) 1 -1 (T (T (E) 2 -7 (E)) 6 0 (T (E) 9 -8 (E))))),(T (E) 1 9 (E)),6,0)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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    {
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      "strategy": "Correct",
      "property": "prop_InsertUnion",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.210209704+00:00",
      "status": "Failed",
      "tests": 5,
      "discards": 0,
      "time": "0.000481s",
      "counterexample": "((T (T (E) -5 4 (E)) -2 -1 (E)),(T (T (T (E) -5 -1 (T (E) -3 4 (E))) 0 1 (E)) 1 -1 (E)),3,-5)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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    {
      "experiment": "ci-run",
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      "strategy": "Correct",
      "property": "prop_InsertUnion",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.213558381+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 0,
      "time": "0.000413s",
      "counterexample": "((T (E) -1 0 (E)),(T (E) -1 1 (E)),0,1)",
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    {
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      "strategy": "Correct",
      "property": "prop_InsertUnion",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.216795945+00:00",
      "status": "Failed",
      "tests": 7,
      "discards": 0,
      "time": "0.000619s",
      "counterexample": "((E),(T (E) -1 3 (E)),3,2)",
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    {
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      "strategy": "Quick",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.234288549+00:00",
      "status": "Failed",
      "tests": 5,
      "discards": 2,
      "time": "0.000514s",
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    {
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      "property": "prop_UnionDeleteInsert",
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        "union_6"
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      "mode": "solve",
      "trial": 1,
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      "timestamp": "2026-04-30T18:46:24.238228625+00:00",
      "status": "Failed",
      "tests": 8,
      "discards": 2,
      "time": "0.000521s",
      "counterexample": "((T (T (E) 0 0 (E)) 1 -2 (E)),(E),-1,7)",
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    {
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      "property": "prop_UnionDeleteInsert",
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      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.241695491+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000412s",
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      "property": "prop_UnionDeleteInsert",
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      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.245030500+00:00",
      "status": "Failed",
      "tests": 8,
      "discards": 15,
      "time": "0.000482s",
      "counterexample": "((T (E) 2 2 (E)),(E),-4,1)",
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    {
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      "property": "prop_UnionDeleteInsert",
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      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.248481698+00:00",
      "status": "Failed",
      "tests": 4,
      "discards": 0,
      "time": "0.000515s",
      "counterexample": "((T (E) -1 0 (T (E) 0 0 (E))),(T (T (E) 0 0 (E)) 1 0 (E)),-1,-3)",
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      "property": "prop_UnionDeleteInsert",
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      "mode": "solve",
      "trial": 5,
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      "timestamp": "2026-04-30T18:46:24.251864444+00:00",
      "status": "Failed",
      "tests": 4,
      "discards": 0,
      "time": "0.000431s",
      "counterexample": "((T (T (E) 0 0 (E)) 1 0 (E)),(E),-4,2)",
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      "property": "prop_UnionDeleteInsert",
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      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.255122652+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000448s",
      "counterexample": "((T (E) 0 0 (E)),(E),-1,-1)",
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    {
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      "strategy": "Quick",
      "property": "prop_UnionDeleteInsert",
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        "union_6"
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      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.258513652+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.000437s",
      "counterexample": "((T (E) 0 0 (E)),(E),-3,2)",
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    {
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      "property": "prop_UnionDeleteInsert",
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        "union_6"
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      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.261711077+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000405s",
      "counterexample": "((T (E) 0 0 (E)),(T (E) 0 0 (E)),-1,-2)",
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    {
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      "property": "prop_UnionDeleteInsert",
      "mutations": [
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      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.264963429+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.000413s",
      "counterexample": "((T (E) 0 0 (E)),(E),-3,3)",
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    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.281704559+00:00",
      "status": "Failed",
      "tests": 5,
      "discards": 1,
      "time": "0.001265s",
      "counterexample": "((T (E) -959 -964 (E)),(E),-997,-936)",
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    {
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      "property": "prop_UnionDeleteInsert",
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        "union_6"
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      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.286279597+00:00",
      "status": "Failed",
      "tests": 7,
      "discards": 4,
      "time": "0.001735s",
      "counterexample": "((T (E) -895 -957 (E)),(E),-970,-909)",
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    {
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      "property": "prop_UnionDeleteInsert",
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      "mode": "solve",
      "trial": 2,
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      "timestamp": "2026-04-30T18:46:24.291097533+00:00",
      "status": "Failed",
      "tests": 10,
      "discards": 13,
      "time": "0.003240s",
      "counterexample": "((T (E) -896 -924 (T (E) -850 -976 (E))),(E),-972,-784)",
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      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
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      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.297466581+00:00",
      "status": "Failed",
      "tests": 17,
      "discards": 5,
      "time": "0.002727s",
      "counterexample": "((T (E) -864 -997 (E)),(E),-868,-990)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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      "property": "prop_UnionDeleteInsert",
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      "mode": "solve",
      "trial": 4,
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      "timestamp": "2026-04-30T18:46:24.303339638+00:00",
      "status": "Failed",
      "tests": 7,
      "discards": 9,
      "time": "0.002564s",
      "counterexample": "((T (E) -844 -894 (E)),(T (E) -942 -935 (E)),-987,-758)",
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    {
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      "property": "prop_UnionDeleteInsert",
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      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.308886881+00:00",
      "status": "Failed",
      "tests": 10,
      "discards": 11,
      "time": "0.002849s",
      "counterexample": "((T (E) -765 -919 (E)),(E),-821,-648)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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    {
      "experiment": "ci-run",
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      "property": "prop_UnionDeleteInsert",
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      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.314732269+00:00",
      "status": "Failed",
      "tests": 27,
      "discards": 30,
      "time": "0.007891s",
      "counterexample": "((T (E) -830 -928 (E)),(E),-913,-676)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
    },
    {
      "experiment": "ci-run",
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      "property": "prop_UnionDeleteInsert",
      "mutations": [
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      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.325772630+00:00",
      "status": "Failed",
      "tests": 18,
      "discards": 19,
      "time": "0.004946s",
      "counterexample": "((T (E) -592 -611 (E)),(E),-839,-931)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
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      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.334070475+00:00",
      "status": "Failed",
      "tests": 38,
      "discards": 61,
      "time": "0.012704s",
      "counterexample": "((T (T (E) -994 -509 (E)) -178 -88 (E)),(E),-810,892)",
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    },
    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
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      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.349908509+00:00",
      "status": "Failed",
      "tests": 8,
      "discards": 12,
      "time": "0.003192s",
      "counterexample": "((T (E) -817 -880 (E)),(E),-990,-708)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
    },
    {
      "experiment": "ci-run",
      "workload": "bst-haskell",
      "language": "Haskell",
      "strategy": "Falsify",
      "property": "prop_UnionDeleteInsert",
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      "time": "0.008223s",
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      "time": "0.007516s",
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      "time": "0.005495s",
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      "mode": "solve",
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      "status": "Failed",
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      "time": "0.003789s",
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      "mode": "solve",
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      "status": "Failed",
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      "time": "0.004445s",
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      "mode": "solve",
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      "status": "Failed",
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      "time": "0.000824s",
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      "mode": "solve",
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      "status": "Failed",
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      "time": "0.000860s",
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      "status": "Failed",
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      "time": "0.005549s",
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      "mode": "solve",
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      "status": "Failed",
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      "time": "0.000803s",
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      "mode": "solve",
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      "status": "Failed",
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      "time": "0.000865s",
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      "property": "prop_UnionDeleteInsert",
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      "time": "0.018210s",
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      "time": "0.018175s",
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      "time": "0.017989s",
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      "time": "0.018121s",
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      "status": "Failed",
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      "time": "0.000470s",
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      "status": "Failed",
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      "time": "0.000432s",
      "counterexample": "((T (E) 0 0 (E)),(T (E) 0 0 (E)),0,0)",
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      "mode": "solve",
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      "timestamp": "2026-04-30T18:46:24.740719786+00:00",
      "status": "Failed",
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      "time": "0.000422s",
      "counterexample": "((T (E) 1 -2 (T (E) 3 1 (E))),(T (E) -4 -3 (T (E) -1 -4 (T (E) 2 -2 (E)))),1,-2)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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      "strategy": "Correct",
      "property": "prop_UnionDeleteInsert",
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        "union_6"
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      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
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      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000447s",
      "counterexample": "((T (T (E) -1 0 (E)) 2 2 (E)),(T (E) -2 2 (T (E) 1 -2 (E))),0,-1)",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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      "property": "prop_UnionDeleteInsert",
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        "union_6"
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      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.899913054+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.000412s",
      "counterexample": "((T (E) -3 3 (T (T (E) -1 -1 (E)) 3 3 (E))),(T (T (E) -2 0 (E)) 2 -2 (E)),-1,2)",
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      "strategy": "Correct",
      "property": "prop_UnionDeleteInsert",
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        "union_6"
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      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.903220552+00:00",
      "status": "Failed",
      "tests": 6,
      "discards": 0,
      "time": "0.000490s",
      "counterexample": "((T (E) 3 -5 (E)),(T (T (E) -6 1 (E)) -4 4 (T (E) -1 0 (T (E) 4 1 (E)))),0,1)",
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      "strategy": "Correct",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
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      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000461s",
      "counterexample": "((T (E) 0 1 (E)),(T (E) 0 2 (E)),-2,0)",
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      "strategy": "Correct",
      "property": "prop_UnionDeleteInsert",
      "mutations": [
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      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.909853012+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000393s",
      "counterexample": "((T (E) 1 2 (E)),(T (E) -1 0 (E)),1,-2)",
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      "strategy": "Quick",
      "property": "prop_UnionUnionAssoc",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 0,
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      "timestamp": "2026-04-30T18:46:24.926900694+00:00",
      "status": "Failed",
      "tests": 13,
      "discards": 15,
      "time": "0.000566s",
      "counterexample": "((T (E) 0 0 (E)),(T (E) -1 2 (E)),(T (E) -1 -1 (E)))",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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      "property": "prop_UnionUnionAssoc",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.930595849+00:00",
      "status": "Failed",
      "tests": 41,
      "discards": 112,
      "time": "0.001184s",
      "counterexample": "((T (E) -2 10 (E)),(T (E) -3 1 (T (E) 1 2 (E))),(T (E) -5 4 (E)))",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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      "property": "prop_UnionUnionAssoc",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.934761927+00:00",
      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000427s",
      "counterexample": "((T (E) 0 0 (E)),(T (E) 0 0 (E)),(T (E) 0 0 (E)))",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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      "strategy": "Quick",
      "property": "prop_UnionUnionAssoc",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.938052777+00:00",
      "status": "Failed",
      "tests": 1,
      "discards": 0,
      "time": "0.000409s",
      "counterexample": "((T (E) 0 0 (E)),(T (E) 0 0 (E)),(T (E) 0 0 (E)))",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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      "property": "prop_UnionUnionAssoc",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.941432216+00:00",
      "status": "Failed",
      "tests": 28,
      "discards": 57,
      "time": "0.000794s",
      "counterexample": "((T (E) -3 0 (E)),(T (E) -6 -6 (E)),(T (E) -5 -2 (E)))",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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      "strategy": "Quick",
      "property": "prop_UnionUnionAssoc",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.945109567+00:00",
      "status": "Failed",
      "tests": 57,
      "discards": 103,
      "time": "0.001037s",
      "counterexample": "((T (E) 6 -11 (E)),(T (E) -6 -6 (E)),(T (E) -9 -1 (E)))",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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      "property": "prop_UnionUnionAssoc",
      "mutations": [
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      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.949151995+00:00",
      "status": "Failed",
      "tests": 14,
      "discards": 16,
      "time": "0.000571s",
      "counterexample": "((T (E) 0 -2 (E)),(T (E) -3 -2 (E)),(T (T (E) 0 0 (E)) 2 1 (E)))",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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      "property": "prop_UnionUnionAssoc",
      "mutations": [
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      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
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      "status": "Failed",
      "tests": 16,
      "discards": 25,
      "time": "0.000652s",
      "counterexample": "((T (E) -2 -4 (E)),(T (E) 4 -2 (E)),(T (T (E) -1 -1 (E)) 0 -4 (E)))",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
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      "status": "Failed",
      "tests": 63,
      "discards": 129,
      "time": "0.001183s",
      "counterexample": "((T (E) -5 -13 (E)),(T (T (T (E) 0 0 (E)) 2 -1 (E)) 14 -13 (E)),(T (T (E) 3 -3 (E)) 13 12 (E)))",
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      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:24.960205932+00:00",
      "status": "Failed",
      "tests": 52,
      "discards": 123,
      "time": "0.001225s",
      "counterexample": "((T (E) -9 13 (T (T (E) 0 0 (E)) 3 1 (E))),(T (E) 12 4 (E)),(T (E) -8 -10 (T (T (E) 0 0 (E)) 1 0 (E))))",
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      "strategy": "Hedgehog",
      "property": "prop_UnionUnionAssoc",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
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      "status": "Failed",
      "tests": 60,
      "discards": 123,
      "time": "0.025765s",
      "counterexample": "((T (E) -594 -989 (E)),(T (E) -441 -558 (E)),(T (E) -177 -812 (E)))",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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      "mode": "solve",
      "trial": 1,
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      "status": "Failed",
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      "discards": 109,
      "time": "0.018629s",
      "counterexample": "((T (T (T (E) -875 -782 (E)) -842 -658 (E)) -471 -562 (E)),(T (E) -412 -840 (E)),(T (E) -550 -631 (E)))",
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      "status": "Failed",
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      "discards": 0,
      "time": "0.001165s",
      "counterexample": "((T (E) -982 -987 (E)),(T (E) -998 -986 (E)),(T (E) -990 -992 (E)))",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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      "mode": "solve",
      "trial": 3,
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      "status": "Failed",
      "tests": 47,
      "discards": 109,
      "time": "0.017340s",
      "counterexample": "((T (E) -638 -675 (E)),(T (E) -726 -949 (E)),(T (E) -500 -552 (E)))",
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      "mode": "solve",
      "trial": 4,
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      "timestamp": "2026-04-30T18:46:25.054255925+00:00",
      "status": "Failed",
      "tests": 183,
      "discards": 352,
      "time": "0.052063s",
      "counterexample": "((T (T (E) -893 -944 (T (E) -886 -919 (E))) -809 -604 (T (E) -793 -863 (E))),(T (E) -685 -609 (E)),(T (T (E) -749 -745 (E)) -617 -638 (E)))",
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      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:25.109956962+00:00",
      "status": "Failed",
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      "discards": 68,
      "time": "0.015420s",
      "counterexample": "((T (T (E) -944 -981 (E)) -933 -883 (E)),(T (E) -991 -997 (E)),(T (E) -878 -895 (E)))",
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      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:25.128861724+00:00",
      "status": "Failed",
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      "discards": 209,
      "time": "0.040929s",
      "counterexample": "((T (E) -1000 -998 (E)),(T (E) -899 -925 (E)),(T (T (E) -979 -977 (E)) -916 -1000 (E)))",
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      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:25.173325502+00:00",
      "status": "Failed",
      "tests": 103,
      "discards": 200,
      "time": "0.030978s",
      "counterexample": "((T (E) -999 -982 (E)),(T (E) -984 -981 (E)),(T (E) -996 -987 (E)))",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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      "property": "prop_UnionUnionAssoc",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:25.208407448+00:00",
      "status": "Failed",
      "tests": 50,
      "discards": 109,
      "time": "0.017079s",
      "counterexample": "((T (E) -834 -954 (E)),(T (E) -868 -773 (E)),(T (E) -366 -421 (E)))",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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      "property": "prop_UnionUnionAssoc",
      "mutations": [
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      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:25.228910074+00:00",
      "status": "Failed",
      "tests": 62,
      "discards": 124,
      "time": "0.025876s",
      "counterexample": "((T (E) -937 -745 (E)),(T (T (E) -809 -745 (E)) -725 -423 (E)),(T (E) -230 -422 (E)))",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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      "strategy": "Falsify",
      "property": "prop_UnionUnionAssoc",
      "mutations": [
        "union_6"
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      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:25.276175324+00:00",
      "status": "Failed",
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      "discards": 3656,
      "time": "0.107223s",
      "counterexample": "((T (E) -486 448 (E)),(T (E) 438 -347 (E)),(T (E) 264 -146 (E)))",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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      "mutations": [
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      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:25.387009902+00:00",
      "status": "Failed",
      "tests": 149,
      "discards": 4910,
      "time": "0.142726s",
      "counterexample": "((T (E) 143 -534 (E)),(T (E) -126 276 (E)),(T (E) 29 -196 (E)))",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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      "property": "prop_UnionUnionAssoc",
      "mutations": [
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      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:25.533551461+00:00",
      "status": "Failed",
      "tests": 67,
      "discards": 1813,
      "time": "0.055347s",
      "counterexample": "((T (E) 129 -473 (E)),(T (T (E) -98 67 (E)) 313 -301 (E)),(T (E) -218 51 (E)))",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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      "property": "prop_UnionUnionAssoc",
      "mutations": [
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      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:46:25.592579477+00:00",
      "status": "Failed",
      "tests": 637,
      "discards": 20015,
      "time": "0.581218s",
      "counterexample": "((T (E) 731 -755 (E)),(T (E) 1 -496 (E)),(T (E) -543 833 (E)))",
      "hash": "daf735fc919fcb2b269b7d1e516e2b0e3cf5f7d6"
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      "property": "prop_UnionUnionAssoc",
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      "mode": "solve",
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      "time": "0.000452s",
      "counterexample": "((T (E) -6 2 (T (T (E) -3 5 (E)) -2 -5 (T (E) 3 -5 (E)))),(T (E) -6 -2 (E)),(T (T (E) -5 5 (E)) -2 1 (T (E) 1 0 (T (T (E) 5 4 (E)) 6 5 (E)))))",
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      "time": "0.000433s",
      "counterexample": "((T (E) -2 -2 (T (E) 3 2 (E))),(T (T (E) -3 1 (E)) -1 -3 (E)),(T (E) 1 -3 (E)))",
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      "time": "0.001600s",
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      "time": "0.025308s",
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      "status": "Failed",
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      "time": "0.001048s",
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      "counterexample": "((T (T (E) 0 1 (E)) 1 3 (E)),(T (T (E) 1 0 (E)) 2 2 (E)),1)",
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      "strategy": "Quick",
      "property": "prop_DeleteUnion",
      "mutations": [
        "union_7"
      ],
      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:55:23.771050161+00:00",
      "status": "Failed",
      "tests": 710,
      "discards": 847,
      "time": "0.005046s",
      "counterexample": "((T (T (E) 0 0 (E)) 2 -1 (E)),(T (E) -1 0 (T (E) 0 0 (E))),2)",
      "hash": "3a4b33a3c3d318ff8c4d7bbfe5147e45c2157348"
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      "property": "prop_DeleteUnion",
      "mutations": [
        "union_7"
      ],
      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:55:23.779170848+00:00",
      "status": "Failed",
      "tests": 2007,
      "discards": 2099,
      "time": "0.008650s",
      "counterexample": "((T (E) -1 1 (T (E) 0 0 (E))),(T (E) 0 1 (E)),-1)",
      "hash": "3a4b33a3c3d318ff8c4d7bbfe5147e45c2157348"
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      "property": "prop_DeleteUnion",
      "mutations": [
        "union_7"
      ],
      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:55:23.790862963+00:00",
      "status": "Failed",
      "tests": 452,
      "discards": 492,
      "time": "0.003786s",
      "counterexample": "((T (T (T (E) 0 0 (E)) 2 -2 (E)) 8 2 (E)),(T (E) 5 -7 (E)),2)",
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      "property": "prop_DeleteUnion",
      "mutations": [
        "union_7"
      ],
      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:55:23.797688555+00:00",
      "status": "Failed",
      "tests": 308,
      "discards": 348,
      "time": "0.002886s",
      "counterexample": "((T (E) -2 -2 (T (E) 0 0 (E))),(T (T (E) 0 0 (E)) 2 -2 (E)),-2)",
      "hash": "3a4b33a3c3d318ff8c4d7bbfe5147e45c2157348"
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      "property": "prop_DeleteUnion",
      "mutations": [
        "union_7"
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      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:55:23.803741261+00:00",
      "status": "Failed",
      "tests": 4499,
      "discards": 5260,
      "time": "0.016364s",
      "counterexample": "((T (T (E) -2 4 (E)) 9 20 (E)),(T (T (E) -1 1 (E)) 12 2 (E)),-1)",
      "hash": "3a4b33a3c3d318ff8c4d7bbfe5147e45c2157348"
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      "property": "prop_DeleteUnion",
      "mutations": [
        "union_7"
      ],
      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:55:23.823106776+00:00",
      "status": "Failed",
      "tests": 275,
      "discards": 330,
      "time": "0.002951s",
      "counterexample": "((T (E) -18 -1 (T (E) -2 1 (T (E) 0 0 (E)))),(T (E) -15 -10 (E)),0)",
      "hash": "3a4b33a3c3d318ff8c4d7bbfe5147e45c2157348"
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      "property": "prop_DeleteUnion",
      "mutations": [
        "union_7"
      ],
      "mode": "solve",
      "trial": 9,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:55:23.829203935+00:00",
      "status": "Failed",
      "tests": 147,
      "discards": 174,
      "time": "0.001698s",
      "counterexample": "((T (T (E) -2 0 (E)) 11 -4 (E)),(T (E) 0 -4 (E)),-2)",
      "hash": "3a4b33a3c3d318ff8c4d7bbfe5147e45c2157348"
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    {
      "experiment": "ci-run",
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      "strategy": "Hedgehog",
      "property": "prop_DeleteUnion",
      "mutations": [
        "union_7"
      ],
      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:55:23.848592372+00:00",
      "status": "Failed",
      "tests": 6386,
      "discards": 7288,
      "time": "0.920102s",
      "counterexample": "((T (T (T (E) -964 -759 (E)) -720 -871 (E)) -679 -159 (T (E) -628 -917 (E))),(T (E) -635 -769 (E)),-628)",
      "hash": "3a4b33a3c3d318ff8c4d7bbfe5147e45c2157348"
    },
    {
      "experiment": "ci-run",
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      "property": "prop_DeleteUnion",
      "mutations": [
        "union_7"
      ],
      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:55:24.772413477+00:00",
      "status": "Failed",
      "tests": 2502,
      "discards": 2952,
      "time": "0.420645s",
      "counterexample": "((T (E) -918 -690 (T (E) -745 -658 (E))),(T (E) -763 -683 (E)),-745)",
      "hash": "3a4b33a3c3d318ff8c4d7bbfe5147e45c2157348"
    },
    {
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      "strategy": "Hedgehog",
      "property": "prop_DeleteUnion",
      "mutations": [
        "union_7"
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      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:55:25.196767130+00:00",
      "status": "Failed",
      "tests": 5545,
      "discards": 6460,
      "time": "0.871624s",
      "counterexample": "((T (T (E) -987 -996 (E)) -963 -986 (E)),(T (T (E) -997 -992 (E)) -966 -986 (E)),-963)",
      "hash": "3a4b33a3c3d318ff8c4d7bbfe5147e45c2157348"
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      "property": "prop_DeleteUnion",
      "mutations": [
        "union_7"
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      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:55:26.072117325+00:00",
      "status": "Failed",
      "tests": 19030,
      "discards": 22175,
      "time": "3.006235s",
      "counterexample": "((T (T (E) -997 -992 (E)) -962 -980 (E)),(T (E) -977 -984 (E)),-962)",
      "hash": "3a4b33a3c3d318ff8c4d7bbfe5147e45c2157348"
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    {
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      "property": "prop_DeleteUnion",
      "mutations": [
        "union_7"
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      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:55:29.081764787+00:00",
      "status": "Failed",
      "tests": 12420,
      "discards": 14487,
      "time": "1.951400s",
      "counterexample": "((T (T (E) -984 -994 (E)) -922 -943 (E)),(T (T (T (E) -980 -991 (E)) -971 -974 (E)) -920 -995 (E)),-980)",
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      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:55:31.037050371+00:00",
      "status": "Failed",
      "tests": 19755,
      "discards": 22954,
      "time": "3.109874s",
      "counterexample": "((T (E) -967 -900 (E)),(T (T (E) -974 -953 (E)) -934 -941 (E)),-974)",
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      "mutations": [
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      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:55:34.150704689+00:00",
      "status": "Failed",
      "tests": 60219,
      "discards": 70287,
      "time": "10.325344s",
      "counterexample": "((T (T (T (E) -999 -987 (E)) -988 -978 (E)) -958 -975 (E)),(T (E) -993 -946 (T (T (E) -989 -985 (E)) -965 -973 (E))),-965)",
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      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:55:44.479707568+00:00",
      "status": "Failed",
      "tests": 26595,
      "discards": 30609,
      "time": "4.427463s",
      "counterexample": "((T (T (E) -994 -998 (E)) -982 -982 (E)),(T (E) -999 -966 (T (E) -980 -997 (E))),-999)",
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      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:55:48.910623865+00:00",
      "status": "Failed",
      "tests": 13832,
      "discards": 16015,
      "time": "2.140589s",
      "counterexample": "((T (T (E) -961 -792 (E)) -498 -516 (E)),(T (E) -863 -545 (E)),-961)",
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      "mode": "solve",
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      "status": "Failed",
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      "discards": 20732,
      "time": "2.991136s",
      "counterexample": "((T (T (E) -995 -988 (E)) -990 -968 (E)),(T (T (E) -995 -989 (E)) -981 -1000 (E)),-995)",
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      "status": "Failed",
      "tests": 27889,
      "discards": 252322,
      "time": "7.479862s",
      "counterexample": "((T (E) -64 -210 (T (E) 25 298 (E))),(T (E) -31 214 (E)),-64)",
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      "status": "Failed",
      "tests": 50912,
      "discards": 457350,
      "time": "13.529751s",
      "counterexample": "((T (E) 96 -298 (E)),(T (E) -15 -255 (T (E) 98 -21 (E))),-15)",
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      "mode": "solve",
      "trial": 2,
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      "timestamp": "2026-04-30T18:56:15.099192452+00:00",
      "status": "Failed",
      "tests": 134774,
      "discards": 1212377,
      "time": "35.757875s",
      "counterexample": "((T (T (E) 341 -173 (E)) 651 161 (E)),(T (E) 468 -20 (E)),341)",
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      "property": "DeleteUnion",
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      "mode": "solve",
      "trial": 3,
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      "status": "timed_out",
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      "experiment": "ci-run",
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      "strategy": "Small",
      "property": "DeleteUnion",
      "mutations": [
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      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:57:50.905463838+00:00",
      "status": "timed_out",
      "hash": "3a4b33a3c3d318ff8c4d7bbfe5147e45c2157348"
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      "experiment": "ci-run",
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      "strategy": "SmallRev",
      "property": "DeleteUnion",
      "mutations": [
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      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:58:50.922564600+00:00",
      "status": "timed_out",
      "hash": "3a4b33a3c3d318ff8c4d7bbfe5147e45c2157348"
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      "property": "prop_DeleteUnion",
      "mutations": [
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      "mode": "solve",
      "trial": 0,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:59:50.953737317+00:00",
      "status": "Failed",
      "tests": 175,
      "discards": null,
      "time": "0.000695s",
      "counterexample": "((T (E) 0 0 (E)),(T (T (E) 0 0 (E)) 1 0 (E)),0)",
      "hash": "3a4b33a3c3d318ff8c4d7bbfe5147e45c2157348"
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      "property": "prop_DeleteUnion",
      "mutations": [
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      "mode": "solve",
      "trial": 1,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:59:50.957916269+00:00",
      "status": "Failed",
      "tests": 175,
      "discards": null,
      "time": "0.000656s",
      "counterexample": "((T (E) 0 0 (E)),(T (T (E) 0 0 (E)) 1 0 (E)),0)",
      "hash": "3a4b33a3c3d318ff8c4d7bbfe5147e45c2157348"
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      "property": "prop_DeleteUnion",
      "mutations": [
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      "mode": "solve",
      "trial": 2,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:59:50.961803060+00:00",
      "status": "Failed",
      "tests": 175,
      "discards": null,
      "time": "0.000629s",
      "counterexample": "((T (E) 0 0 (E)),(T (T (E) 0 0 (E)) 1 0 (E)),0)",
      "hash": "3a4b33a3c3d318ff8c4d7bbfe5147e45c2157348"
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      "property": "prop_DeleteUnion",
      "mutations": [
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      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:59:50.965491832+00:00",
      "status": "Failed",
      "tests": 175,
      "discards": null,
      "time": "0.000620s",
      "counterexample": "((T (E) 0 0 (E)),(T (T (E) 0 0 (E)) 1 0 (E)),0)",
      "hash": "3a4b33a3c3d318ff8c4d7bbfe5147e45c2157348"
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      "experiment": "ci-run",
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      "mutations": [
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      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:59:50.969109871+00:00",
      "status": "Failed",
      "tests": 175,
      "discards": null,
      "time": "0.000552s",
      "counterexample": "((T (E) 0 0 (E)),(T (T (E) 0 0 (E)) 1 0 (E)),0)",
      "hash": "3a4b33a3c3d318ff8c4d7bbfe5147e45c2157348"
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      "experiment": "ci-run",
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      "property": "prop_DeleteUnion",
      "mutations": [
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      "mode": "solve",
      "trial": 5,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:59:50.972662929+00:00",
      "status": "Failed",
      "tests": 175,
      "discards": null,
      "time": "0.000576s",
      "counterexample": "((T (E) 0 0 (E)),(T (T (E) 0 0 (E)) 1 0 (E)),0)",
      "hash": "3a4b33a3c3d318ff8c4d7bbfe5147e45c2157348"
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      "experiment": "ci-run",
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      "strategy": "Lean",
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      "mutations": [
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      "mode": "solve",
      "trial": 6,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:59:50.976468980+00:00",
      "status": "Failed",
      "tests": 175,
      "discards": null,
      "time": "0.000602s",
      "counterexample": "((T (E) 0 0 (E)),(T (T (E) 0 0 (E)) 1 0 (E)),0)",
      "hash": "3a4b33a3c3d318ff8c4d7bbfe5147e45c2157348"
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      "experiment": "ci-run",
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      "property": "prop_DeleteUnion",
      "mutations": [
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      "mode": "solve",
      "trial": 7,
      "timeout": 60.0,
      "timestamp": "2026-04-30T18:59:50.980072903+00:00",
      "status": "Failed",
      "tests": 175,
      "discards": null,
      "time": "0.000556s",
      "counterexample": "((T (E) 0 0 (E)),(T (T (E) 0 0 (E)) 1 0 (E)),0)",
      "hash": "3a4b33a3c3d318ff8c4d7bbfe5147e45c2157348"
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      "timestamp": "2026-04-30T19:00:51.850227337+00:00",
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      "time": "0.009381s",
      "counterexample": "((T (E) 16 -993 (E)),(T (E) -182 -306 (E)),103,301)",
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      "strategy": "Hedgehog",
      "property": "prop_UnionDeleteInsert",
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      "mode": "solve",
      "trial": 2,
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      "timestamp": "2026-04-30T19:00:51.862807944+00:00",
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      "tests": 50,
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      "time": "0.015399s",
      "counterexample": "((T (E) -885 -776 (E)),(T (E) -902 -775 (E)),-874,-747)",
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      "mode": "solve",
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      "timestamp": "2026-04-30T19:00:51.881651997+00:00",
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      "time": "0.001926s",
      "counterexample": "((T (E) -861 -934 (E)),(T (T (E) -976 -955 (E)) -885 -928 (E)),-825,-918)",
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      "mode": "solve",
      "trial": 4,
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      "time": "0.011271s",
      "counterexample": "((T (T (T (T (E) -994 -994 (E)) -969 -984 (E)) -949 -975 (E)) -901 -931 (E)),(E),-963,-900)",
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        "union_7"
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      "mode": "solve",
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      "status": "Failed",
      "tests": 78,
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      "time": "0.015182s",
      "counterexample": "((T (T (T (E) -747 -768 (E)) -691 -562 (E)) -425 -591 (E)),(E),-668,-732)",
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      "property": "prop_UnionDeleteInsert",
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        "union_7"
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      "mode": "solve",
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      "status": "Failed",
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      "time": "0.001114s",
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      "property": "prop_UnionDeleteInsert",
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      "mode": "solve",
      "trial": 7,
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      "status": "Failed",
      "tests": 31,
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      "time": "0.006229s",
      "counterexample": "((T (T (E) -809 -968 (E)) -333 -315 (E)),(E),-806,-241)",
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        "union_7"
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      "mode": "solve",
      "trial": 8,
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      "property": "prop_UnionDeleteInsert",
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      "mode": "solve",
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      "trial": 0,
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      "timestamp": "2026-04-30T19:02:52.237105413+00:00",
      "status": "Failed",
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      "time": "0.000753s",
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      "time": "0.000672s",
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      "time": "0.000652s",
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      "time": "0.000705s",
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      "time": "0.000428s",
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      "time": "0.000467s",
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      "counterexample": "((T (E) -2 1 (T (E) 3 -2 (E))),(E),2,-1)",
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      "counterexample": "((T (E) -2 -4 (T (T (E) 2 -2 (E)) 4 3 (E))),(T (E) -4 4 (T (T (E) -2 -2 (E)) 1 -1 (E))),3,1)",
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      "counterexample": "((T (E) -9 -6 (T (T (E) -4 -2 (T (E) -1 5 (E))) 3 -5 (T (T (E) 8 -8 (E)) 9 -4 (E)))),(T (T (E) 4 6 (E)) 5 -9 (T (T (T (E) 6 3 (E)) 7 0 (E)) 8 -6 (T (E) 9 5 (E)))),-3,9)",
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      "timestamp": "2026-04-30T19:02:52.358518076+00:00",
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      "time": "0.000465s",
      "counterexample": "((T (T (T (E) -4 -5 (T (E) -3 -4 (E))) 0 7 (T (E) 3 -4 (E))) 6 -2 (E)),(T (E) -3 0 (E)),6,-3)",
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      "time": "0.000424s",
      "counterexample": "((T (T (E) -5 -2 (E)) -4 1 (T (T (E) -3 -1 (E)) -2 3 (T (E) 6 3 (E)))),(T (T (E) -1 2 (E)) 3 5 (T (E) 4 1 (T (E) 6 -3 (E)))),-4,5)",
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      "mode": "solve",
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      "discards": 0,
      "time": "0.000418s",
      "counterexample": "((T (T (T (E) -5 5 (T (E) -2 -3 (E))) 0 0 (E)) 1 0 (E)),(T (E) -5 3 (T (T (E) -4 -1 (E)) -2 2 (E))),5,1)",
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      "timestamp": "2026-04-30T19:02:52.393657126+00:00",
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      "time": "0.002548s",
      "counterexample": "((T (E) 14 4 (E)),(T (E) -5 -7 (E)),(T (T (E) 2 -1 (E)) 12 -1 (E)))",
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      "status": "Failed",
      "tests": 7,
      "discards": 0,
      "time": "0.000460s",
      "counterexample": "((T (T (E) -7 -1 (T (T (E) -2 0 (E)) -1 -4 (T (E) 0 2 (E)))) 1 -5 (T (E) 6 -5 (E))),(T (T (T (E) -6 -3 (E)) -4 -2 (E)) 3 1 (E)),(T (T (T (E) -7 3 (E)) -6 6 (E)) 2 1 (E)))",
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      "mode": "solve",
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      "timestamp": "2026-04-30T19:04:53.658910411+00:00",
      "status": "Failed",
      "tests": 2,
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      "time": "0.000395s",
      "counterexample": "((T (E) -1 0 (T (E) 2 0 (E))),(T (E) 0 -2 (E)),(T (E) 1 0 (E)))",
      "hash": "3a4b33a3c3d318ff8c4d7bbfe5147e45c2157348"
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      "mode": "solve",
      "trial": 4,
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      "status": "Failed",
      "tests": 2,
      "discards": 0,
      "time": "0.000401s",
      "counterexample": "((T (E) 1 -1 (E)),(T (T (E) -1 -2 (E)) 2 2 (E)),(T (T (E) -2 0 (E)) 2 0 (E)))",
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      "mode": "solve",
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      "tests": 7,
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      "time": "0.000467s",
      "counterexample": "((T (E) -1 -6 (T (E) 2 -6 (T (E) 4 7 (E)))),(T (E) -5 -3 (T (E) -2 0 (E))),(T (E) -2 -3 (E)))",
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      "time": "0.000423s",
      "counterexample": "((T (T (E) -5 0 (T (T (E) -4 -3 (E)) -2 4 (E))) 5 -4 (E)),(T (E) -1 1 (E)),(T (E) -1 -3 (T (E) 5 -5 (E))))",
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      "mode": "solve",
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      "status": "Failed",
      "tests": 5,
      "discards": 0,
      "time": "0.000449s",
      "counterexample": "((T (T (E) -1 2 (T (E) 3 4 (T (E) 4 1 (E)))) 5 5 (E)),(T (T (E) -1 -2 (E)) 1 -3 (T (E) 2 1 (E))),(T (E) 0 -3 (T (T (E) 3 2 (E)) 4 0 (T (E) 5 1 (E)))))",
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      "mode": "solve",
      "trial": 8,
      "timeout": 60.0,
      "timestamp": "2026-04-30T19:04:53.675378845+00:00",
      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.000427s",
      "counterexample": "((T (E) 1 0 (E)),(T (E) 3 0 (E)),(T (E) -1 -1 (E)))",
      "hash": "3a4b33a3c3d318ff8c4d7bbfe5147e45c2157348"
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      "mode": "solve",
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      "timestamp": "2026-04-30T19:04:53.678547421+00:00",
      "status": "Failed",
      "tests": 4,
      "discards": 0,
      "time": "0.000478s",
      "counterexample": "((T (T (E) -4 3 (T (E) -2 2 (E))) 2 3 (T (E) 4 -4 (E))),(T (E) -4 2 (T (T (E) 1 4 (E)) 2 0 (E))),(T (T (E) -1 -1 (E)) 0 4 (E)))",
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      "property": "prop_UnionPost",
      "mutations": [
        "union_8"
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      "mode": "solve",
      "trial": 0,
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      "timestamp": "2026-04-30T19:05:02.937653386+00:00",
      "status": "Failed",
      "tests": 16710,
      "discards": 7636,
      "time": "0.033893s",
      "counterexample": "((T (T (E) 0 0 (E)) 2 1 (E)),(T (T (E) 0 0 (E)) 0 -1 (E)),0)",
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      "mode": "solve",
      "trial": 1,
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      "timestamp": "2026-04-30T19:05:02.974890498+00:00",
      "status": "Failed",
      "tests": 20909,
      "discards": 9512,
      "time": "0.041947s",
      "counterexample": "((T (E) 0 -2 (E)),(T (T (E) 0 0 (E)) -2 1 (T (E) 0 0 (E))),0)",
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      "mode": "solve",
      "trial": 2,
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      "timestamp": "2026-04-30T19:05:03.019928931+00:00",
      "status": "Failed",
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      "time": "0.005373s",
      "counterexample": "((T (T (E) -1 -1 (T (E) 0 0 (E))) 1 0 (E)),(T (T (E) 1 0 (T (E) 0 0 (E))) -1 6 (T (E) 1 -1 (T (E) 0 0 (E)))),-1)",
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      "trial": 3,
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      "timestamp": "2026-04-30T19:05:03.028407524+00:00",
      "status": "Failed",
      "tests": 14105,
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      "time": "0.028873s",
      "counterexample": "((T (T (E) 0 0 (E)) 1 -1 (E)),(T (E) 0 1 (E)),0)",
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      "mode": "solve",
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      "timestamp": "2026-04-30T19:05:03.060300008+00:00",
      "status": "Failed",
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      "status": "Failed",
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      "time": "0.113352s",
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      "discards": 2453,
      "time": "0.012637s",
      "counterexample": "((T (E) -15 -7 (T (T (E) -1 -1 (T (E) 0 0 (E))) 4 -2 (E))),(T (E) -2 17 (T (E) 4 1 (T (E) -1 -1 (T (E) 0 0 (E))))),4)",
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      "timestamp": "2026-04-30T19:05:03.248578665+00:00",
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      "tests": 5622,
      "discards": 2620,
      "time": "0.013349s",
      "counterexample": "((T (T (E) -1 -1 (E)) 0 4 (E)),(T (T (E) 1 1 (E)) -5 -3 (T (T (E) 0 0 (E)) 0 -1 (T (E) 0 0 (E)))),0)",
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      "status": "Failed",
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      "discards": 2807,
      "time": "0.013958s",
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      "status": "Failed",
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      "counterexample": "((T (T (E) -988 -982 (E)) -987 -991 (T (E) -980 -987 (E))),(T (T (E) -984 -1000 (E)) -988 -972 (T (E) -995 -986 (E))),-988)",
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      "mode": "solve",
      "trial": 0,
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      "timestamp": "2026-04-30T19:06:56.786929353+00:00",
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      "status": "timed_out",
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      "timestamp": "2026-04-30T19:08:56.948595525+00:00",
      "status": "timed_out",
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      "timestamp": "2026-04-30T19:09:56.980023288+00:00",
      "status": "Failed",
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      "timestamp": "2026-04-30T19:09:56.984952307+00:00",
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      "time": "0.001261s",
      "counterexample": "((T (T (E) 0 0 (E)) 1 0 (E)),(T (E) 0 1 (E)),0)",
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      "timestamp": "2026-04-30T19:09:56.989252462+00:00",
      "status": "Failed",
      "tests": 945,
      "discards": null,
      "time": "0.001364s",
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      "mode": "solve",
      "trial": 3,
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      "timestamp": "2026-04-30T19:09:56.993790438+00:00",
      "status": "Failed",
      "tests": 945,
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      "time": "0.001258s",
      "counterexample": "((T (T (E) 0 0 (E)) 1 0 (E)),(T (E) 0 1 (E)),0)",
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      "mode": "solve",
      "trial": 4,
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      "timestamp": "2026-04-30T19:09:56.998167349+00:00",
      "status": "Failed",
      "tests": 945,
      "discards": null,
      "time": "0.001243s",
      "counterexample": "((T (T (E) 0 0 (E)) 1 0 (E)),(T (E) 0 1 (E)),0)",
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      "trial": 5,
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      "timestamp": "2026-04-30T19:09:57.002555174+00:00",
      "status": "Failed",
      "tests": 945,
      "discards": null,
      "time": "0.001282s",
      "counterexample": "((T (T (E) 0 0 (E)) 1 0 (E)),(T (E) 0 1 (E)),0)",
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      "trial": 6,
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      "timestamp": "2026-04-30T19:09:57.006706283+00:00",
      "status": "Failed",
      "tests": 945,
      "discards": null,
      "time": "0.001240s",
      "counterexample": "((T (T (E) 0 0 (E)) 1 0 (E)),(T (E) 0 1 (E)),0)",
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      "timestamp": "2026-04-30T19:09:57.011063381+00:00",
      "status": "Failed",
      "tests": 945,
      "discards": null,
      "time": "0.001251s",
      "counterexample": "((T (T (E) 0 0 (E)) 1 0 (E)),(T (E) 0 1 (E)),0)",
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      "status": "Failed",
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      "time": "0.000412s",
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      "timestamp": "2026-04-30T19:18:58.025424684+00:00",
      "status": "Failed",
      "tests": 3821,
      "discards": null,
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      "tests": 4496,
      "discards": 5162,
      "time": "0.732183s",
      "counterexample": "((T (E) -730 -577 (E)),(T (E) -747 -330 (E)),-747,-238)",
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      "property": "prop_InsertUnion",
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        "union_8"
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      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T19:19:02.606904062+00:00",
      "status": "Failed",
      "tests": 2138,
      "discards": 2477,
      "time": "0.431162s",
      "counterexample": "((E),(T (E) -966 -845 (T (E) -900 -966 (E))),-900,-762)",
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      "mode": "solve",
      "trial": 5,
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      "timestamp": "2026-04-30T19:19:03.041834564+00:00",
      "status": "Failed",
      "tests": 7895,
      "discards": 9180,
      "time": "1.236896s",
      "counterexample": "((E),(T (E) -978 -623 (T (E) -629 -995 (E))),-629,-874)",
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      "mode": "solve",
      "trial": 6,
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      "timestamp": "2026-04-30T19:19:04.282443286+00:00",
      "status": "Failed",
      "tests": 4,
      "discards": 1,
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      "mode": "solve",
      "trial": 7,
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      "timestamp": "2026-04-30T19:19:04.286931122+00:00",
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      "tests": 727,
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      "time": "0.123519s",
      "counterexample": "((T (T (T (E) -889 -947 (E)) -769 -895 (E)) -700 -945 (E)),(T (T (T (T (E) -975 -927 (E)) -935 -871 (T (E) -922 -990 (E))) -814 -814 (E)) -743 -669 (E)),-814,-816)",
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      "mode": "solve",
      "trial": 8,
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      "timestamp": "2026-04-30T19:19:04.413846383+00:00",
      "status": "Failed",
      "tests": 1438,
      "discards": 1676,
      "time": "0.223422s",
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      "mode": "solve",
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      "status": "Failed",
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      "timestamp": "2026-04-30T19:19:06.340469473+00:00",
      "status": "Failed",
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      "trial": 1,
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      "timestamp": "2026-04-30T19:19:14.075771262+00:00",
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      "tests": 15321,
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      "mode": "solve",
      "trial": 2,
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      "timestamp": "2026-04-30T19:19:18.266199465+00:00",
      "status": "Failed",
      "tests": 30738,
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      "mode": "solve",
      "trial": 3,
      "timeout": 60.0,
      "timestamp": "2026-04-30T19:19:26.565285423+00:00",
      "status": "Failed",
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      "mode": "solve",
      "trial": 4,
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      "timestamp": "2026-04-30T19:19:28.006039703+00:00",
      "status": "Failed",
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      "mode": "solve",
      "trial": 5,
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      "timestamp": "2026-04-30T19:19:36.823751077+00:00",
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      "tests": 6539,
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      "trial": 6,
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      "mode": "solve",
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      "timestamp": "2026-04-30T19:19:47.754965159+00:00",
      "status": "Failed",
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      "time": "0.131286s",
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      "timestamp": "2026-04-30T19:19:47.889570703+00:00",
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      "time": "7.915242s",
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      "mode": "solve",
      "trial": 9,
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      "status": "Failed",
      "tests": 38812,
      "discards": 347965,
      "time": "10.614440s",
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      "timestamp": "2026-04-30T19:20:06.452949033+00:00",
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      "timestamp": "2026-04-30T19:24:24.614496143+00:00",
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      "timestamp": "2026-04-30T19:25:04.576436292+00:00",
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      "mode": "solve",
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      "timestamp": "2026-04-30T19:25:44.253211116+00:00",
      "status": "Failed",
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      "mode": "solve",
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      "timestamp": "2026-04-30T19:26:23.854952998+00:00",
      "status": "Failed",
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      "mode": "solve",
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      "timestamp": "2026-04-30T19:27:03.935906169+00:00",
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      "timestamp": "2026-04-30T19:27:44.239975888+00:00",
      "status": "Failed",
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      "trial": 1,
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      "timestamp": "2026-04-30T19:27:44.244131522+00:00",
      "status": "Failed",
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      "discards": null,
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      "mode": "solve",
      "trial": 2,
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      "timestamp": "2026-04-30T19:27:44.247874838+00:00",
      "status": "Failed",
      "tests": 262,
      "discards": null,
      "time": "0.000675s",
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      "mode": "solve",
      "trial": 3,
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      "timestamp": "2026-04-30T19:27:44.251764994+00:00",
      "status": "Failed",
      "tests": 262,
      "discards": null,
      "time": "0.000677s",
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      "mode": "solve",
      "trial": 4,
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      "timestamp": "2026-04-30T19:27:44.255415346+00:00",
      "status": "Failed",
      "tests": 262,
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      "counterexample": "((T (T (T (T (E) -24 20 (E)) -23 24 (E)) -19 -10 (T (T (E) -17 -23 (E)) -14 23 (T (T (T (E) -9 14 (E)) -7 14 (E)) -6 -20 (E)))) 1 -2 (T (T (E) 2 -3 (T (E) 3 11 (E))) 6 -15 (T (E) 8 -5 (T (T (T (E) 9 -14 (E)) 13 13 (T (E) 15 -10 (T (E) 19 19 (E)))) 23 24 (E))))),(T (T (T (E) -9 -19 (E)) -8 -12 (T (E) 2 15 (T (E) 12 -8 (E)))) 19 -13 (E)),19,-15)",
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        "union_8"
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      "mode": "solve",
      "trial": 6,
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      "timestamp": "2026-04-30T19:27:44.417430107+00:00",
      "status": "Failed",
      "tests": 20,
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      "time": "0.000747s",
      "counterexample": "((T (T (T (T (T (E) -11 14 (E)) -6 -10 (E)) -4 17 (E)) -3 18 (T (T (E) 9 20 (E)) 10 -17 (E))) 20 -10 (E)),(T (T (T (T (E) -12 12 (E)) -9 18 (T (E) -7 3 (T (E) 2 -18 (E)))) 6 -7 (T (T (E) 9 -7 (E)) 11 -17 (E))) 17 -3 (T (E) 20 -14 (E))),20,10)",
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      "mode": "solve",
      "trial": 7,
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      "status": "Failed",
      "tests": 6,
      "discards": 0,
      "time": "0.000416s",
      "counterexample": "((T (E) -5 -1 (T (T (E) -4 3 (E)) 5 -2 (E))),(T (E) 0 2 (E)),0,-3)",
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      "mode": "solve",
      "trial": 8,
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      "timestamp": "2026-04-30T19:27:44.424144842+00:00",
      "status": "Failed",
      "tests": 11,
      "discards": 0,
      "time": "0.000587s",
      "counterexample": "((T (T (T (T (E) -9 -6 (E)) -8 11 (E)) -6 2 (T (T (E) -3 -2 (E)) -2 4 (T (E) 8 8 (T (E) 10 7 (E))))) 11 10 (E)),(T (E) -5 4 (T (T (E) -3 9 (E)) -1 -6 (T (E) 0 -7 (T (E) 9 -8 (E))))),0,-10)",
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        "union_8"
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      "mode": "solve",
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      "status": "Failed",
      "tests": 3,
      "discards": 0,
      "time": "0.000450s",
      "counterexample": "((T (T (E) -2 -3 (E)) 0 2 (T (E) 2 -1 (E))),(T (E) -2 1 (T (T (E) 2 -3 (E)) 3 -2 (E))),-2,0)",
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      "property": "prop_UnionDeleteInsert",
      "mutations": [
        "union_8"
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      "mode": "solve",
      "trial": 0,
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      "timestamp": "2026-04-30T19:27:44.450253010+00:00",
      "status": "Failed",
      "tests": 27056,
      "discards": 30780,
      "time": "0.093413s",
      "counterexample": "((T (T (E) -1 1 (T (E) 0 0 (E))) 10 3 (E)),(T (E) 0 6 (E)),10,44)",
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        "union_8"
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      "mode": "solve",
      "trial": 1,
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      "status": "Failed",
      "tests": 16613,
      "discards": 18957,
      "time": "0.059326s",
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      "mode": "solve",
      "trial": 2,
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      "status": "Failed",
      "tests": 66510,
      "discards": 75036,
      "time": "0.224656s",
      "counterexample": "((T (T (E) 0 0 (E)) 1 -1 (E)),(T (E) 0 -1 (E)),1,8)",
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      "mode": "solve",
      "trial": 3,
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      "status": "Failed",
      "tests": 14309,
      "discards": 16120,
      "time": "0.050850s",
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      "mode": "solve",
      "trial": 4,
      "timeout": 60.0,
      "timestamp": "2026-04-30T19:27:44.890690500+00:00",
      "status": "Failed",
      "tests": 24904,
      "discards": 28392,
      "time": "0.086527s",
      "counterexample": "((T (T (E) 0 0 (E)) 1 1 (E)),(T (E) 0 -1 (E)),1,3)",
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      "property": "prop_UnionDeleteInsert",
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      "mode": "solve",
      "trial": 5,
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      "timestamp": "2026-04-30T19:27:44.980223668+00:00",
      "status": "Failed",
      "tests": 26005,
      "discards": 29883,
      "time": "0.090251s",
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      "mode": "solve",
      "trial": 6,
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      "timestamp": "2026-04-30T19:27:45.073773878+00:00",
      "status": "Failed",
      "tests": 1409,
      "discards": 1630,
      "time": "0.007396s",
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      "mode": "solve",
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      "timestamp": "2026-04-30T19:27:45.084331520+00:00",
      "status": "Failed",
      "tests": 9307,
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      "time": "0.034640s",
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      "mode": "solve",
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      "timestamp": "2026-04-30T19:27:45.121965975+00:00",
      "status": "Failed",
      "tests": 21605,
      "discards": 24200,
      "time": "0.075652s",
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      "mode": "solve",
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      "timestamp": "2026-04-30T19:27:45.200883462+00:00",
      "status": "Failed",
      "tests": 2305,
      "discards": 2669,
      "time": "0.010771s",
      "counterexample": "((T (T (E) 0 0 (E)) 1 -1 (E)),(T (E) 0 -1 (E)),1,-2)",
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      "trial": 0,
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      "timestamp": "2026-04-30T19:27:45.232858941+00:00",
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      "mutations": [
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      "mode": "solve",
      "trial": 0,
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      "timestamp": "2026-04-30T19:28:45.251851752+00:00",
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      "property": "UnionDeleteInsert",
      "mutations": [
        "union_8"
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      "mode": "solve",
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      "timestamp": "2026-04-30T19:29:45.287921594+00:00",
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      "status": "Failed",
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      "time": "0.007331s",
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      "timestamp": "2026-04-30T19:31:45.360857745+00:00",
      "status": "Failed",
      "tests": 5476,
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      "time": "0.007512s",
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      "timestamp": "2026-04-30T19:31:45.371586874+00:00",
      "status": "Failed",
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      "timestamp": "2026-04-30T19:31:45.382997437+00:00",
      "status": "Failed",
      "tests": 5476,
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      "time": "0.007497s",
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      "timestamp": "2026-04-30T19:31:45.393865625+00:00",
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      "tests": 5476,
      "discards": null,
      "time": "0.007328s",
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      "timestamp": "2026-04-30T19:31:45.404645981+00:00",
      "status": "Failed",
      "tests": 5476,
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      "timestamp": "2026-04-30T19:31:45.415674565+00:00",
      "status": "Failed",
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      "discards": null,
      "time": "0.007508s",
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      "mode": "solve",
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      "timestamp": "2026-04-30T19:31:45.437765299+00:00",
      "status": "Failed",
      "tests": 5476,
      "discards": null,
      "time": "0.007439s",
      "counterexample": "((T (T (E) 0 0 (E)) 1 0 (E)),(T (E) 0 1 (E)),1,0)",
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      "timestamp": "2026-04-30T19:31:45.465771166+00:00",
      "status": "Failed",
      "tests": 7626,
      "discards": null,
      "time": "0.010255s",
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      "mode": "solve",
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      "timestamp": "2026-04-30T19:31:45.479613965+00:00",
      "status": "Failed",
      "tests": 7626,
      "discards": null,
      "time": "0.010070s",
      "counterexample": "(1,0,(T (T (E) 0 0 (E)) 1 0 (E)),(T (E) 0 1 (E)))",
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      "mode": "solve",
      "trial": 2,
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      "timestamp": "2026-04-30T19:31:45.493028233+00:00",
      "status": "Failed",
      "tests": 7626,
      "discards": null,
      "time": "0.009493s",
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      "time": "0.000398s",
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      "time": "0.000496s",
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      "trial": 4,
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      "status": "Failed",
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      "time": "0.000516s",
      "counterexample": "((T (T (E) -5 0 (T (E) -3 5 (T (E) -2 -6 (E)))) 0 4 (T (T (E) 3 2 (E)) 5 5 (E))),(T (T (E) -3 -2 (T (E) -2 4 (E))) 2 -4 (T (E) 4 1 (T (E) 6 -1 (E)))),(T (T (E) -1 -2 (T (T (E) 1 -1 (E)) 2 0 (E))) 5 6 (E)))",
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      "status": "Failed",
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      "time": "0.000420s",
      "counterexample": "((T (T (E) -2 -1 (E)) -1 -3 (T (E) 0 1 (E))),(T (E) 1 -3 (T (E) 2 3 (E))),(T (E) -2 -1 (T (E) 1 -1 (E))))",
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      "status": "Failed",
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      "time": "0.000441s",
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      "time": "0.000479s",
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      "status": "Failed",
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}