{"abstract":"Circumference times height computes lateral area rather than volume.","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. Cylinder volume divided by pi. Exact operational definition: r*r*h","contract_signature":"r, h","evaluation_group":"model-581efdb19ab64809","failed_approach":"The circular cross-section omits one radius factor.","family":"xn-cylinder-volume-divided-by-pi","id":"FA-5921","implementations":{"attempt":{"sha256":"6554f5b122d787ca410fbbbf84663de80d23e2a7ea11a9fa038908b5ed0e2d61","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(r, h):\n    return r*h\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('fixture 1: (2, 3)', solve(*(2, 3)), 12)\ncheck('fixture 2: (1, 4)', solve(*(1, 4)), 4)\ncheck('fixture 3: (0, 8)', solve(*(0, 8)), 0)\ncheck('fixture 4: (3, 0)', solve(*(3, 0)), 0)\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":"e6fee7923f9e5fe74f713cdfb59dd067be3a51d73f79b2031912492db87851db","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(r, h):\n    return 2*r*h\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('fixture 1: (2, 3)', solve(*(2, 3)), 12)\ncheck('fixture 2: (1, 4)', solve(*(1, 4)), 4)\ncheck('fixture 3: (0, 8)', solve(*(0, 8)), 0)\ncheck('fixture 4: (3, 0)', solve(*(3, 0)), 0)\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-cylinder-volume-divided-by-pi","generated_at":"2026-09-29T14:37:55.378932+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":"Circumference times height computes lateral area rather than volume.","sha256":"24c245cf52602b4d3c3dd283f0e07e29b5b2f5d64bd7c77a236d96aea314d9fd","title":"Cylinder volume divided by pi · 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":56.379,"exit_code":1,"observations":[{"actual":6,"check":"fixture 1: (2, 3)","expected":12,"passed":false},{"actual":4,"check":"fixture 2: (1, 4)","expected":4,"passed":true},{"actual":0,"check":"fixture 3: (0, 8)","expected":0,"passed":true},{"actual":0,"check":"fixture 4: (3, 0)","expected":0,"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 1: (2, 3)\", \"actual\": 6, \"expected\": 12, \"passed\": false}, {\"check\": \"fixture 2: (1, 4)\", \"actual\": 4, \"expected\": 4, \"passed\": true}, {\"check\": \"fixture 3: (0, 8)\", \"actual\": 0, \"expected\": 0, \"passed\": true}, {\"check\": \"fixture 4: (3, 0)\", \"actual\": 0, \"expected\": 0, \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":47.746,"exit_code":1,"observations":[{"actual":12,"check":"fixture 1: (2, 3)","expected":12,"passed":true},{"actual":8,"check":"fixture 2: (1, 4)","expected":4,"passed":false},{"actual":0,"check":"fixture 3: (0, 8)","expected":0,"passed":true},{"actual":0,"check":"fixture 4: (3, 0)","expected":0,"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 1: (2, 3)\", \"actual\": 12, \"expected\": 12, \"passed\": true}, {\"check\": \"fixture 2: (1, 4)\", \"actual\": 8, \"expected\": 4, \"passed\": false}, {\"check\": \"fixture 3: (0, 8)\", \"actual\": 0, \"expected\": 0, \"passed\": true}, {\"check\": \"fixture 4: (3, 0)\", \"actual\": 0, \"expected\": 0, \"passed\": true}], \"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."}}