{"abstract":"Withdrawal fails to invalidate an unopened sealed commitment.","category":"Auction allocation rules","checks":10,"contract":"Stipulated sealed-bid envelope processing: one bidder, one lot, a commit and reveal phase. A replacement commit invalidates an earlier digest. Reveal payloads are immutable, phase counters are integers, and byte strings are represented by ordinary strings. Output named admission decisions and retained payloads. Named decision withdrawal-tombstone: Apply the withdrawal tombstone before opening status.","contract_signature":"x","evaluation_group":"s3-auction-sealed-envelope","failed_approach":"The attempted repair uses None if x[\"withdrawn\"] and x[\"opened\"] else x[\"digest\"]; the explicit regression cases demonstrate that this still violates the stipulated auction rule.","family":"s3-auction-allocation-rules-sealed-envelope-withdrawal-tombstone","id":"FA-56351","implementations":{"attempt":{"sha256":"3cf6fac9896a0ee1cb8048e4701717a5c882fefff6198639cc9096c26b5c0f42","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(x):\n    v0 = x[\"revealed\"] == (x[\"commits\"][-1] if x[\"commits\"] else None)\n    v1 = x[\"commit_round\"] < x[\"reveal_round\"] <= x[\"close\"]\n    v2 = None if x[\"withdrawn\"] and x[\"opened\"] else x[\"digest\"]\n    v3 = [] if x[\"opened\"] else x[\"payloads\"][:1]\n    v4 = next((p for p,v in zip(x[\"payloads\"],x[\"valid\"]) if v),None)\n    v5 = x[\"nonce\"] == x[\"required_nonce\"]\n    v6 = x[\"owner\"] == x[\"signer\"]\n    v7 = x[\"sealed_value\"] if x[\"opened\"] else x[\"public_value\"]\n    v8 = x[\"lot\"] == x[\"reveal_lot\"]\n    v9 = sum(1 for v in x[\"valid\"] if v)\n    return {'replacement-digest':v0,'reveal-phase':v1,'withdrawal-tombstone':v2,'replay-disclosure':v3,'first-valid-reveal':v4,'nonce-binding':v5,'signer-binding':v6,'preopening-secrecy':v7,'lot-binding':v8,'verified-reveal-count':v9}\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [('withdrawn before opening', {'digest': 'v2', 'revealed': 'v1', 'commit_round': 1, 'reveal_round': 2, 'close': 2, 'withdrawn': True, 'opened': False, 'commits': ['v1', 'v2'], 'payloads': ['red', 'blue'], 'valid': [False, True], 'reveal_count': 2, 'nonce': 'n', 'required_nonce': 'n', 'owner': 'alice', 'signer': 'alice', 'sealed_value': 9, 'public_value': 0, 'lot': 'A', 'reveal_lot': 'A'}, [None, None, None, None, None]), ('two verified envelopes / withdrawn before opening', {'digest': 'v2', 'revealed': 'v1', 'commit_round': 1, 'reveal_round': 2, 'close': 2, 'withdrawn': True, 'opened': False, 'commits': ['v1', 'v2'], 'payloads': ['red', 'blue'], 'valid': [True, True], 'reveal_count': 2, 'nonce': 'n', 'required_nonce': 'n', 'owner': 'alice', 'signer': 'alice', 'sealed_value': 9, 'public_value': 0, 'lot': 'A', 'reveal_lot': 'A'}, [None, None, None, None, None]), ('normal contract', {'digest': 'v2', 'revealed': 'v1', 'commit_round': 1, 'reveal_round': 2, 'close': 2, 'withdrawn': False, 'opened': False, 'commits': ['v1', 'v2'], 'payloads': ['red', 'blue'], 'valid': [False, True], 'reveal_count': 2, 'nonce': 'n', 'required_nonce': 'n', 'owner': 'alice', 'signer': 'alice', 'sealed_value': 9, 'public_value': 0, 'lot': 'A', 'reveal_lot': 'A'}, ['v2', 'v2', 'v2', 'v2', 'v2']), ('two verified envelopes', {'digest': 'v2', 'revealed': 'v1', 'commit_round': 1, 'reveal_round': 2, 'close': 2, 'withdrawn': False, 'opened': False, 'commits': ['v1', 'v2'], 'payloads': ['red', 'blue'], 'valid': [True, True], 'reveal_count': 2, 'nonce': 'n', 'required_nonce': 'n', 'owner': 'alice', 'signer': 'alice', 'sealed_value': 9, 'public_value': 0, 'lot': 'A', 'reveal_lot': 'A'}, ['v2', 'v2', 'v2', 'v2', 'v2']), ('valid last envelope', {'digest': 'v2', 'revealed': 'v2', 'commit_round': 1, 'reveal_round': 2, 'close': 2, 'withdrawn': False, 'opened': False, 'commits': ['v1', 'v2'], 'payloads': ['red', 'blue'], 'valid': [False, True], 'reveal_count': 2, 'nonce': 'n', 'required_nonce': 'n', 'owner': 'alice', 'signer': 'alice', 'sealed_value': 9, 'public_value': 0, 'lot': 'A', 'reveal_lot': 'A'}, ['v2', 'v2', 'v2', 'v2', 'v2']), ('first envelope only', {'digest': 'v1', 'revealed': 'v1', 'commit_round': 1, 'reveal_round': 2, 'close': 2, 'withdrawn': False, 'opened': False, 'commits': ['v1'], 'payloads': ['red'], 'valid': [True], 'reveal_count': 1, 'nonce': 'n', 'required_nonce': 'n', 'owner': 'alice', 'signer': 'alice', 'sealed_value': 9, 'public_value': 0, 'lot': 'A', 'reveal_lot': 'A'}, ['v1', 'v1', 'v1', 'v1', 'v1']), ('no envelopes', {'digest': 'v2', 'revealed': 'v1', 'commit_round': 1, 'reveal_round': 2, 'close': 2, 'withdrawn': False, 'opened': False, 'commits': [], 'payloads': [], 'valid': [], 'reveal_count': 0, 'nonce': 'n', 'required_nonce': 'n', 'owner': 'alice', 'signer': 'alice', 'sealed_value': 9, 'public_value': 0, 'lot': 'A', 'reveal_lot': 'A'}, ['v2', 'v2', 'v2', 'v2', 'v2']), ('opened envelope replay', {'digest': 'v2', 'revealed': 'v1', 'commit_round': 1, 'reveal_round': 2, 'close': 2, 'withdrawn': False, 'opened': True, 'commits': ['v1', 'v2'], 'payloads': ['red', 'blue'], 'valid': [False, True], 'reveal_count': 2, 'nonce': 'n', 'required_nonce': 'n', 'owner': 'alice', 'signer': 'alice', 'sealed_value': 9, 'public_value': 0, 'lot': 'A', 'reveal_lot': 'A'}, ['v2', 'v2', 'v2', 'v2', 'v2']), ('outside reveal round', {'digest': 'v2', 'revealed': 'v1', 'commit_round': 1, 'reveal_round': 3, 'close': 2, 'withdrawn': False, 'opened': False, 'commits': ['v1', 'v2'], 'payloads': ['red', 'blue'], 'valid': [False, True], 'reveal_count': 2, 'nonce': 'n', 'required_nonce': 'n', 'owner': 'alice', 'signer': 'alice', 'sealed_value': 9, 'public_value': 0, 'lot': 'A', 'reveal_lot': 'A'}, ['v2', 'v2', 'v2', 'v2', 'v2']), ('same-round premature reveal', {'digest': 'v2', 'revealed': 'v1', 'commit_round': 1, 'reveal_round': 1, 'close': 2, 'withdrawn': False, 'opened': False, 'commits': ['v1', 'v2'], 'payloads': ['red', 'blue'], 'valid': [False, True], 'reveal_count': 2, 'nonce': 'n', 'required_nonce': 'n', 'owner': 'alice', 'signer': 'alice', 'sealed_value': 9, 'public_value': 0, 'lot': 'A', 'reveal_lot': 'A'}, ['v2', 'v2', 'v2', 'v2', 'v2'])]\ndef vary(value):\n if type(value) is int: return value*N\n if isinstance(value,list): return [vary(v) for v in value]\n if isinstance(value,dict): return {k:(v if k in ['count', 'delivery_index', 'disputed', 'maximum_set', 'minimum_set', 'reveal_count', 'stage', 'threshold', 'waived'] else vary(v)) for k,v in value.items()}\n return value\nfor label, request, expected in fixtures:\n check(label, solve(vary(request))['withdrawal-tombstone'], expected[N-1])\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":"58e97b62f20303c00bccafa4e05a282e5459fe25c6416f91f694a9bd98a4f0e6","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(x):\n    v0 = x[\"revealed\"] == (x[\"commits\"][-1] if x[\"commits\"] else None)\n    v1 = x[\"commit_round\"] < x[\"reveal_round\"] <= x[\"close\"]\n    v2 = x[\"digest\"]\n    v3 = [] if x[\"opened\"] else x[\"payloads\"][:1]\n    v4 = next((p for p,v in zip(x[\"payloads\"],x[\"valid\"]) if v),None)\n    v5 = x[\"nonce\"] == x[\"required_nonce\"]\n    v6 = x[\"owner\"] == x[\"signer\"]\n    v7 = x[\"sealed_value\"] if x[\"opened\"] else x[\"public_value\"]\n    v8 = x[\"lot\"] == x[\"reveal_lot\"]\n    v9 = sum(1 for v in x[\"valid\"] if v)\n    return {'replacement-digest':v0,'reveal-phase':v1,'withdrawal-tombstone':v2,'replay-disclosure':v3,'first-valid-reveal':v4,'nonce-binding':v5,'signer-binding':v6,'preopening-secrecy':v7,'lot-binding':v8,'verified-reveal-count':v9}\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [('withdrawn before opening', {'digest': 'v2', 'revealed': 'v1', 'commit_round': 1, 'reveal_round': 2, 'close': 2, 'withdrawn': True, 'opened': False, 'commits': ['v1', 'v2'], 'payloads': ['red', 'blue'], 'valid': [False, True], 'reveal_count': 2, 'nonce': 'n', 'required_nonce': 'n', 'owner': 'alice', 'signer': 'alice', 'sealed_value': 9, 'public_value': 0, 'lot': 'A', 'reveal_lot': 'A'}, [None, None, None, None, None]), ('two verified envelopes / withdrawn before opening', {'digest': 'v2', 'revealed': 'v1', 'commit_round': 1, 'reveal_round': 2, 'close': 2, 'withdrawn': True, 'opened': False, 'commits': ['v1', 'v2'], 'payloads': ['red', 'blue'], 'valid': [True, True], 'reveal_count': 2, 'nonce': 'n', 'required_nonce': 'n', 'owner': 'alice', 'signer': 'alice', 'sealed_value': 9, 'public_value': 0, 'lot': 'A', 'reveal_lot': 'A'}, [None, None, None, None, None]), ('normal contract', {'digest': 'v2', 'revealed': 'v1', 'commit_round': 1, 'reveal_round': 2, 'close': 2, 'withdrawn': False, 'opened': False, 'commits': ['v1', 'v2'], 'payloads': ['red', 'blue'], 'valid': [False, True], 'reveal_count': 2, 'nonce': 'n', 'required_nonce': 'n', 'owner': 'alice', 'signer': 'alice', 'sealed_value': 9, 'public_value': 0, 'lot': 'A', 'reveal_lot': 'A'}, ['v2', 'v2', 'v2', 'v2', 'v2']), ('two verified envelopes', {'digest': 'v2', 'revealed': 'v1', 'commit_round': 1, 'reveal_round': 2, 'close': 2, 'withdrawn': False, 'opened': False, 'commits': ['v1', 'v2'], 'payloads': ['red', 'blue'], 'valid': [True, True], 'reveal_count': 2, 'nonce': 'n', 'required_nonce': 'n', 'owner': 'alice', 'signer': 'alice', 'sealed_value': 9, 'public_value': 0, 'lot': 'A', 'reveal_lot': 'A'}, ['v2', 'v2', 'v2', 'v2', 'v2']), ('valid last envelope', {'digest': 'v2', 'revealed': 'v2', 'commit_round': 1, 'reveal_round': 2, 'close': 2, 'withdrawn': False, 'opened': False, 'commits': ['v1', 'v2'], 'payloads': ['red', 'blue'], 'valid': [False, True], 'reveal_count': 2, 'nonce': 'n', 'required_nonce': 'n', 'owner': 'alice', 'signer': 'alice', 'sealed_value': 9, 'public_value': 0, 'lot': 'A', 'reveal_lot': 'A'}, ['v2', 'v2', 'v2', 'v2', 'v2']), ('first envelope only', {'digest': 'v1', 'revealed': 'v1', 'commit_round': 1, 'reveal_round': 2, 'close': 2, 'withdrawn': False, 'opened': False, 'commits': ['v1'], 'payloads': ['red'], 'valid': [True], 'reveal_count': 1, 'nonce': 'n', 'required_nonce': 'n', 'owner': 'alice', 'signer': 'alice', 'sealed_value': 9, 'public_value': 0, 'lot': 'A', 'reveal_lot': 'A'}, ['v1', 'v1', 'v1', 'v1', 'v1']), ('no envelopes', {'digest': 'v2', 'revealed': 'v1', 'commit_round': 1, 'reveal_round': 2, 'close': 2, 'withdrawn': False, 'opened': False, 'commits': [], 'payloads': [], 'valid': [], 'reveal_count': 0, 'nonce': 'n', 'required_nonce': 'n', 'owner': 'alice', 'signer': 'alice', 'sealed_value': 9, 'public_value': 0, 'lot': 'A', 'reveal_lot': 'A'}, ['v2', 'v2', 'v2', 'v2', 'v2']), ('opened envelope replay', {'digest': 'v2', 'revealed': 'v1', 'commit_round': 1, 'reveal_round': 2, 'close': 2, 'withdrawn': False, 'opened': True, 'commits': ['v1', 'v2'], 'payloads': ['red', 'blue'], 'valid': [False, True], 'reveal_count': 2, 'nonce': 'n', 'required_nonce': 'n', 'owner': 'alice', 'signer': 'alice', 'sealed_value': 9, 'public_value': 0, 'lot': 'A', 'reveal_lot': 'A'}, ['v2', 'v2', 'v2', 'v2', 'v2']), ('outside reveal round', {'digest': 'v2', 'revealed': 'v1', 'commit_round': 1, 'reveal_round': 3, 'close': 2, 'withdrawn': False, 'opened': False, 'commits': ['v1', 'v2'], 'payloads': ['red', 'blue'], 'valid': [False, True], 'reveal_count': 2, 'nonce': 'n', 'required_nonce': 'n', 'owner': 'alice', 'signer': 'alice', 'sealed_value': 9, 'public_value': 0, 'lot': 'A', 'reveal_lot': 'A'}, ['v2', 'v2', 'v2', 'v2', 'v2']), ('same-round premature reveal', {'digest': 'v2', 'revealed': 'v1', 'commit_round': 1, 'reveal_round': 1, 'close': 2, 'withdrawn': False, 'opened': False, 'commits': ['v1', 'v2'], 'payloads': ['red', 'blue'], 'valid': [False, True], 'reveal_count': 2, 'nonce': 'n', 'required_nonce': 'n', 'owner': 'alice', 'signer': 'alice', 'sealed_value': 9, 'public_value': 0, 'lot': 'A', 'reveal_lot': 'A'}, ['v2', 'v2', 'v2', 'v2', 'v2'])]\ndef vary(value):\n if type(value) is int: return value*N\n if isinstance(value,list): return [vary(v) for v in value]\n if isinstance(value,dict): return {k:(v if k in ['count', 'delivery_index', 'disputed', 'maximum_set', 'minimum_set', 'reveal_count', 'stage', 'threshold', 'waived'] else vary(v)) for k,v in value.items()}\n return value\nfor label, request, expected in fixtures:\n check(label, solve(vary(request))['withdrawal-tombstone'], expected[N-1])\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":"Stipulated toy auction rules, not a venue specification, financial advice, optimization claim, or live trading implementation. Nonnegative integer inputs and internally aligned list fields only. 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":"s3-auction-allocation-rules-sealed-envelope-withdrawal-tombstone","generated_at":"2026-09-29T14:46:06.305251+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"Offline administrative auction model for software failure analysis.","root_cause":"Withdrawal fails to invalidate an unopened sealed commitment.","sha256":"9c34a4d9e4e62a9943eb55e76cbefa1e7e023252f2275059cef77ce51da3d0c3","title":"Sealed envelope: withdrawal tombstone · 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":41.994,"exit_code":1,"observations":[{"actual":"v2","check":"withdrawn before opening","expected":null,"passed":false},{"actual":"v2","check":"two verified envelopes / withdrawn before opening","expected":null,"passed":false},{"actual":"v2","check":"normal contract","expected":"v2","passed":true},{"actual":"v2","check":"two verified envelopes","expected":"v2","passed":true},{"actual":"v2","check":"valid last envelope","expected":"v2","passed":true},{"actual":"v1","check":"first envelope only","expected":"v1","passed":true},{"actual":"v2","check":"no envelopes","expected":"v2","passed":true},{"actual":"v2","check":"opened envelope replay","expected":"v2","passed":true},{"actual":"v2","check":"outside reveal round","expected":"v2","passed":true},{"actual":"v2","check":"same-round premature reveal","expected":"v2","passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"withdrawn before opening\", \"actual\": \"v2\", \"expected\": null, \"passed\": false}, {\"check\": \"two verified envelopes / withdrawn before opening\", \"actual\": \"v2\", \"expected\": null, \"passed\": false}, {\"check\": \"normal contract\", \"actual\": \"v2\", \"expected\": \"v2\", \"passed\": true}, {\"check\": \"two verified envelopes\", \"actual\": \"v2\", \"expected\": \"v2\", \"passed\": true}, {\"check\": \"valid last envelope\", \"actual\": \"v2\", \"expected\": \"v2\", \"passed\": true}, {\"check\": \"first envelope only\", \"actual\": \"v1\", \"expected\": \"v1\", \"passed\": true}, {\"check\": \"no envelopes\", \"actual\": \"v2\", \"expected\": \"v2\", \"passed\": true}, {\"check\": \"opened envelope replay\", \"actual\": \"v2\", \"expected\": \"v2\", \"passed\": true}, {\"check\": \"outside reveal round\", \"actual\": \"v2\", \"expected\": \"v2\", \"passed\": true}, {\"check\": \"same-round premature reveal\", \"actual\": \"v2\", \"expected\": \"v2\", \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":41.06,"exit_code":1,"observations":[{"actual":"v2","check":"withdrawn before opening","expected":null,"passed":false},{"actual":"v2","check":"two verified envelopes / withdrawn before opening","expected":null,"passed":false},{"actual":"v2","check":"normal contract","expected":"v2","passed":true},{"actual":"v2","check":"two verified envelopes","expected":"v2","passed":true},{"actual":"v2","check":"valid last envelope","expected":"v2","passed":true},{"actual":"v1","check":"first envelope only","expected":"v1","passed":true},{"actual":"v2","check":"no envelopes","expected":"v2","passed":true},{"actual":"v2","check":"opened envelope replay","expected":"v2","passed":true},{"actual":"v2","check":"outside reveal round","expected":"v2","passed":true},{"actual":"v2","check":"same-round premature reveal","expected":"v2","passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"withdrawn before opening\", \"actual\": \"v2\", \"expected\": null, \"passed\": false}, {\"check\": \"two verified envelopes / withdrawn before opening\", \"actual\": \"v2\", \"expected\": null, \"passed\": false}, {\"check\": \"normal contract\", \"actual\": \"v2\", \"expected\": \"v2\", \"passed\": true}, {\"check\": \"two verified envelopes\", \"actual\": \"v2\", \"expected\": \"v2\", \"passed\": true}, {\"check\": \"valid last envelope\", \"actual\": \"v2\", \"expected\": \"v2\", \"passed\": true}, {\"check\": \"first envelope only\", \"actual\": \"v1\", \"expected\": \"v1\", \"passed\": true}, {\"check\": \"no envelopes\", \"actual\": \"v2\", \"expected\": \"v2\", \"passed\": true}, {\"check\": \"opened envelope replay\", \"actual\": \"v2\", \"expected\": \"v2\", \"passed\": true}, {\"check\": \"outside reveal round\", \"actual\": \"v2\", \"expected\": \"v2\", \"passed\": true}, {\"check\": \"same-round premature reveal\", \"actual\": \"v2\", \"expected\": \"v2\", \"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."}}