{"abstract":"Squaring the sum introduces cross terms.","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 space diagonal squared. Exact operational definition: a*a+b*b+c*c","contract_signature":"a, b, c","evaluation_group":"model-b4f3cc515d4052f4","failed_approach":"A face diagonal omits the third dimension.","family":"xn-cuboid-space-diagonal-squared","id":"FA-5941","implementations":{"attempt":{"sha256":"9c85163448c4084600703cd6d269e8b216f1013950f422dcaf446d7521af3bd5","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*a+b*b\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('fixture 1: (2, 3, 6)', solve(*(2, 3, 6)), 49)\ncheck('fixture 2: (1, 1, 1)', solve(*(1, 1, 1)), 3)\ncheck('fixture 3: (0, 0, 0)', solve(*(0, 0, 0)), 0)\ncheck('fixture 4: (0, 3, 4)', solve(*(0, 3, 4)), 25)\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":"aef54274d6ecf6585facfde4d9bb895f3dc55dd97a481e45868d0b1fe9468c10","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)**2\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('fixture 1: (2, 3, 6)', solve(*(2, 3, 6)), 49)\ncheck('fixture 2: (1, 1, 1)', solve(*(1, 1, 1)), 3)\ncheck('fixture 3: (0, 0, 0)', solve(*(0, 0, 0)), 0)\ncheck('fixture 4: (0, 3, 4)', solve(*(0, 3, 4)), 25)\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-space-diagonal-squared","generated_at":"2026-09-29T14:37:55.448013+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":"Squaring the sum introduces cross terms.","sha256":"fe2fcc621555697cb7a77570e5ca3e18d06103ba3df9e9a7ebfaf816e4c497af","title":"Cuboid space diagonal squared · 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":48.312,"exit_code":1,"observations":[{"actual":13,"check":"fixture 1: (2, 3, 6)","expected":49,"passed":false},{"actual":2,"check":"fixture 2: (1, 1, 1)","expected":3,"passed":false},{"actual":0,"check":"fixture 3: (0, 0, 0)","expected":0,"passed":true},{"actual":9,"check":"fixture 4: (0, 3, 4)","expected":25,"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 1: (2, 3, 6)\", \"actual\": 13, \"expected\": 49, \"passed\": false}, {\"check\": \"fixture 2: (1, 1, 1)\", \"actual\": 2, \"expected\": 3, \"passed\": false}, {\"check\": \"fixture 3: (0, 0, 0)\", \"actual\": 0, \"expected\": 0, \"passed\": true}, {\"check\": \"fixture 4: (0, 3, 4)\", \"actual\": 9, \"expected\": 25, \"passed\": false}], \"passed\": false}\n"},"broken":{"elapsed_ms":46.968,"exit_code":1,"observations":[{"actual":121,"check":"fixture 1: (2, 3, 6)","expected":49,"passed":false},{"actual":9,"check":"fixture 2: (1, 1, 1)","expected":3,"passed":false},{"actual":0,"check":"fixture 3: (0, 0, 0)","expected":0,"passed":true},{"actual":49,"check":"fixture 4: (0, 3, 4)","expected":25,"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 1: (2, 3, 6)\", \"actual\": 121, \"expected\": 49, \"passed\": false}, {\"check\": \"fixture 2: (1, 1, 1)\", \"actual\": 9, \"expected\": 3, \"passed\": false}, {\"check\": \"fixture 3: (0, 0, 0)\", \"actual\": 0, \"expected\": 0, \"passed\": true}, {\"check\": \"fixture 4: (0, 3, 4)\", \"actual\": 49, \"expected\": 25, \"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."}}