{"abstract":"Volume replaces total face area.","category":"Solid geometry","checks":4,"contract":"Nonnegative integer dimensions; exact products and ordinary Python real division. Quantities named divided by pi or pi-squared deliberately omit that factor from the returned result. Cuboid surface area. Exact operational definition: 2*(a*b+b*c+c*a)","contract_signature":"a, b, c","evaluation_group":"model-11e7ca21afd49573","failed_approach":"Edge lengths replace pairwise face products.","family":"xn-cuboid-surface-area","id":"FA-5936","implementations":{"attempt":{"sha256":"c3c6117dc149b87cddee1f60834a75dc5392dc779faa52ee8d844302fd03d037","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\nimport math\nimport calendar\nimport statistics\nimport itertools\nfrom fractions import Fraction\nfrom datetime import date, datetime, timedelta, timezone\nfrom decimal import Decimal, ROUND_HALF_UP, ROUND_DOWN, ROUND_CEILING, ROUND_FLOOR\n\nN = 1\nobservations = []\ndef solve(a, b, c):\n    return 2*(a+b+c)\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('fixture 1: (2, 3, 4)', solve(*(2, 3, 4)), 52)\ncheck('fixture 2: (1, 1, 1)', solve(*(1, 1, 1)), 6)\ncheck('fixture 3: (0, 2, 3)', solve(*(0, 2, 3)), 12)\ncheck('fixture 4: (3, 3, 3)', solve(*(3, 3, 3)), 54)\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"},"broken":{"sha256":"c5eac6da8c602dddc44d374b0ed858c41db330e7672e616b93f45d428f23f4f5","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\nimport math\nimport calendar\nimport statistics\nimport itertools\nfrom fractions import Fraction\nfrom datetime import date, datetime, timedelta, timezone\nfrom decimal import Decimal, ROUND_HALF_UP, ROUND_DOWN, ROUND_CEILING, ROUND_FLOOR\n\nN = 1\nobservations = []\ndef solve(a, b, c):\n    return a*b*c\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('fixture 1: (2, 3, 4)', solve(*(2, 3, 4)), 52)\ncheck('fixture 2: (1, 1, 1)', solve(*(1, 1, 1)), 6)\ncheck('fixture 3: (0, 2, 3)', solve(*(0, 2, 3)), 12)\ncheck('fixture 4: (3, 3, 3)', solve(*(3, 3, 3)), 54)\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"}},"limitations":" This reproducer isolates one failure mechanism. Results cover the supplied fixtures. Variants within a family share a test contract and should remain grouped when constructing evaluation splits. Related mechanisms with a shared evaluation_group must also remain together; these controlled models are not independent production incidents.","method":"Deterministic executable model with adversarial boundary fixtures.","provenance":{"created_by":"Failure Map","dependencies":"Python standard library","family":"xn-cuboid-surface-area","generated_at":"2026-09-29T14:37:55.438988+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"Small exact fixtures expose this error without platform timing, external services, or probabilistic observations. Solid geometry results depend on the stated convention.","root_cause":"Volume replaces total face area.","sha256":"e1451c2c019054fdeb7de127c4fdde385474eafcd3c0b72730fa7fdbd89922e3","title":"Cuboid surface area · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verified":true,"visibility":"public","verification":{"attempt":{"elapsed_ms":47.598,"exit_code":1,"observations":[{"actual":18,"check":"fixture 1: (2, 3, 4)","expected":52,"passed":false},{"actual":6,"check":"fixture 2: (1, 1, 1)","expected":6,"passed":true},{"actual":10,"check":"fixture 3: (0, 2, 3)","expected":12,"passed":false},{"actual":18,"check":"fixture 4: (3, 3, 3)","expected":54,"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 1: (2, 3, 4)\", \"actual\": 18, \"expected\": 52, \"passed\": false}, {\"check\": \"fixture 2: (1, 1, 1)\", \"actual\": 6, \"expected\": 6, \"passed\": true}, {\"check\": \"fixture 3: (0, 2, 3)\", \"actual\": 10, \"expected\": 12, \"passed\": false}, {\"check\": \"fixture 4: (3, 3, 3)\", \"actual\": 18, \"expected\": 54, \"passed\": false}], \"passed\": false}\n"},"broken":{"elapsed_ms":48.979,"exit_code":1,"observations":[{"actual":24,"check":"fixture 1: (2, 3, 4)","expected":52,"passed":false},{"actual":1,"check":"fixture 2: (1, 1, 1)","expected":6,"passed":false},{"actual":0,"check":"fixture 3: (0, 2, 3)","expected":12,"passed":false},{"actual":27,"check":"fixture 4: (3, 3, 3)","expected":54,"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 1: (2, 3, 4)\", \"actual\": 24, \"expected\": 52, \"passed\": false}, {\"check\": \"fixture 2: (1, 1, 1)\", \"actual\": 1, \"expected\": 6, \"passed\": false}, {\"check\": \"fixture 3: (0, 2, 3)\", \"actual\": 0, \"expected\": 12, \"passed\": false}, {\"check\": \"fixture 4: (3, 3, 3)\", \"actual\": 27, \"expected\": 54, \"passed\": false}], \"passed\": false}\n"}},"member_only":{"stages":["fixed"],"fields":["implementations.fixed","verification.fixed","harness","repair"],"note":"The verified repair, its recorded checks, the repair description, and the scoring harness are available to members."}}