{"abstract":"Packet offsets are reported as packet indices instead of sample positions.","category":"PCM sample encoding","checks":8,"contract":"Present a PCM packet table after globally removing declared priming and remainder sample counts; retain raw cumulative sample offsets for each packet.","evaluation_group":"s3-pcm-caf-pcm-packet-table","failed_approach":"Using packet length is not a cumulative sample offset.","family":"s3-pcm-caf-pcm-packet-table-packet-start-units","id":"FA-49526","implementations":{"attempt":{"sha256":"ad698e8f25275a3b07cdda4b8448efa18d8123fdf981756e4da38476b2fe1098","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(packets, priming, remainder):\n    all_samples=[]\n    packet_starts=[]\n    for samples in packets:\n        packet_starts.append(len(samples))\n        all_samples.extend(samples)\n    start=min(max(priming,0),len(all_samples))\n    end=max(start,len(all_samples)-max(remainder,0))\n    return [all_samples[start:end],packet_starts,start,end]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('oracle 1', solve(*([[1, 2], [3, 4, 5]], 1, 1)), [[2, 3, 4], [0, 2], 1, 4])\ncheck('oracle 2', solve(*([[1], [2, 3], [4]], 3, 0)), [[4], [0, 1, 3], 3, 4])\ncheck('oracle 3', solve(*([[1, 2, 3, 4]], 2, 0)), [[3, 4], [0], 2, 4])\ncheck('oracle 4', solve(*([], 2, 1)), [[], [], 0, 0])\ncheck('oracle 5', solve(*([[1, 2], [3]], -1, -1)), [[1, 2, 3], [0, 2], 0, 3])\ncheck('oracle 6', solve(*([[1, 2, 3], [4, 5]], 1, 2)), [[2, 3], [0, 3], 1, 3])\ncheck('oracle 7', solve(*([[], [7], []], 0, 0)), [[7], [0, 0, 1], 0, 1])\nif N == 1: check('variant packet 1', solve(*[[[1, 2], [3, 4, 5], [1, 2], [3, 4, 5]], 1, 1]), [[2, 3, 4, 5, 1, 2, 3, 4], [0, 2, 5, 7], 1, 9])\nif N == 2: check('variant packet 2', solve(*[[[1, 2], [3, 4, 5], [1, 2], [3, 4, 5], [1, 2], [3, 4, 5]], 1, 1]), [[2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4], [0, 2, 5, 7, 10, 12], 1, 14])\nif N == 3: check('variant packet 3', solve(*[[[1, 2], [3, 4, 5], [1, 2], [3, 4, 5], [1, 2], [3, 4, 5], [1, 2], [3, 4, 5]], 1, 1]), [[2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4], [0, 2, 5, 7, 10, 12, 15, 17], 1, 19])\nif N == 4: check('variant packet 4', solve(*[[[1, 2], [3, 4, 5], [1, 2], [3, 4, 5], [1, 2], [3, 4, 5], [1, 2], [3, 4, 5], [1, 2], [3, 4, 5]], 1, 1]), [[2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4], [0, 2, 5, 7, 10, 12, 15, 17, 20, 22], 1, 24])\nif N == 5: check('variant packet 5', solve(*[[[1, 2], [3, 4, 5], [1, 2], [3, 4, 5], [1, 2], [3, 4, 5], [1, 2], [3, 4, 5], [1, 2], [3, 4, 5], [1, 2], [3, 4, 5]], 1, 1]), [[2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4], [0, 2, 5, 7, 10, 12, 15, 17, 20, 22, 25, 27], 1, 29])\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":"2d128e53bc080db175502f036b5bf6ddc7f23faaf20bbad1339113e54db160d2","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(packets, priming, remainder):\n    all_samples=[]\n    packet_starts=[]\n    for samples in packets:\n        packet_starts.append(len(packet_starts))\n        all_samples.extend(samples)\n    start=min(max(priming,0),len(all_samples))\n    end=max(start,len(all_samples)-max(remainder,0))\n    return [all_samples[start:end],packet_starts,start,end]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('oracle 1', solve(*([[1, 2], [3, 4, 5]], 1, 1)), [[2, 3, 4], [0, 2], 1, 4])\ncheck('oracle 2', solve(*([[1], [2, 3], [4]], 3, 0)), [[4], [0, 1, 3], 3, 4])\ncheck('oracle 3', solve(*([[1, 2, 3, 4]], 2, 0)), [[3, 4], [0], 2, 4])\ncheck('oracle 4', solve(*([], 2, 1)), [[], [], 0, 0])\ncheck('oracle 5', solve(*([[1, 2], [3]], -1, -1)), [[1, 2, 3], [0, 2], 0, 3])\ncheck('oracle 6', solve(*([[1, 2, 3], [4, 5]], 1, 2)), [[2, 3], [0, 3], 1, 3])\ncheck('oracle 7', solve(*([[], [7], []], 0, 0)), [[7], [0, 0, 1], 0, 1])\nif N == 1: check('variant packet 1', solve(*[[[1, 2], [3, 4, 5], [1, 2], [3, 4, 5]], 1, 1]), [[2, 3, 4, 5, 1, 2, 3, 4], [0, 2, 5, 7], 1, 9])\nif N == 2: check('variant packet 2', solve(*[[[1, 2], [3, 4, 5], [1, 2], [3, 4, 5], [1, 2], [3, 4, 5]], 1, 1]), [[2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4], [0, 2, 5, 7, 10, 12], 1, 14])\nif N == 3: check('variant packet 3', solve(*[[[1, 2], [3, 4, 5], [1, 2], [3, 4, 5], [1, 2], [3, 4, 5], [1, 2], [3, 4, 5]], 1, 1]), [[2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4], [0, 2, 5, 7, 10, 12, 15, 17], 1, 19])\nif N == 4: check('variant packet 4', solve(*[[[1, 2], [3, 4, 5], [1, 2], [3, 4, 5], [1, 2], [3, 4, 5], [1, 2], [3, 4, 5], [1, 2], [3, 4, 5]], 1, 1]), [[2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4], [0, 2, 5, 7, 10, 12, 15, 17, 20, 22], 1, 24])\nif N == 5: check('variant packet 5', solve(*[[[1, 2], [3, 4, 5], [1, 2], [3, 4, 5], [1, 2], [3, 4, 5], [1, 2], [3, 4, 5], [1, 2], [3, 4, 5], [1, 2], [3, 4, 5]], 1, 1]), [[2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4], [0, 2, 5, 7, 10, 12, 15, 17, 20, 22, 25, 27], 1, 29])\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"},"fixed":{"sha256":"154ccc99c8e9b8b75066d1c13da7552fbb25232a78e2eaf47fbede1239051d1e","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(packets, priming, remainder):\n    all_samples=[]\n    packet_starts=[]\n    for samples in packets:\n        packet_starts.append(len(all_samples))\n        all_samples.extend(samples)\n    start=min(max(priming,0),len(all_samples))\n    end=max(start,len(all_samples)-max(remainder,0))\n    return [all_samples[start:end],packet_starts,start,end]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('oracle 1', solve(*([[1, 2], [3, 4, 5]], 1, 1)), [[2, 3, 4], [0, 2], 1, 4])\ncheck('oracle 2', solve(*([[1], [2, 3], [4]], 3, 0)), [[4], [0, 1, 3], 3, 4])\ncheck('oracle 3', solve(*([[1, 2, 3, 4]], 2, 0)), [[3, 4], [0], 2, 4])\ncheck('oracle 4', solve(*([], 2, 1)), [[], [], 0, 0])\ncheck('oracle 5', solve(*([[1, 2], [3]], -1, -1)), [[1, 2, 3], [0, 2], 0, 3])\ncheck('oracle 6', solve(*([[1, 2, 3], [4, 5]], 1, 2)), [[2, 3], [0, 3], 1, 3])\ncheck('oracle 7', solve(*([[], [7], []], 0, 0)), [[7], [0, 0, 1], 0, 1])\nif N == 1: check('variant packet 1', solve(*[[[1, 2], [3, 4, 5], [1, 2], [3, 4, 5]], 1, 1]), [[2, 3, 4, 5, 1, 2, 3, 4], [0, 2, 5, 7], 1, 9])\nif N == 2: check('variant packet 2', solve(*[[[1, 2], [3, 4, 5], [1, 2], [3, 4, 5], [1, 2], [3, 4, 5]], 1, 1]), [[2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4], [0, 2, 5, 7, 10, 12], 1, 14])\nif N == 3: check('variant packet 3', solve(*[[[1, 2], [3, 4, 5], [1, 2], [3, 4, 5], [1, 2], [3, 4, 5], [1, 2], [3, 4, 5]], 1, 1]), [[2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4], [0, 2, 5, 7, 10, 12, 15, 17], 1, 19])\nif N == 4: check('variant packet 4', solve(*[[[1, 2], [3, 4, 5], [1, 2], [3, 4, 5], [1, 2], [3, 4, 5], [1, 2], [3, 4, 5], [1, 2], [3, 4, 5]], 1, 1]), [[2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4], [0, 2, 5, 7, 10, 12, 15, 17, 20, 22], 1, 24])\nif N == 5: check('variant packet 5', solve(*[[[1, 2], [3, 4, 5], [1, 2], [3, 4, 5], [1, 2], [3, 4, 5], [1, 2], [3, 4, 5], [1, 2], [3, 4, 5], [1, 2], [3, 4, 5]], 1, 1]), [[2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4], [0, 2, 5, 7, 10, 12, 15, 17, 20, 22, 25, 27], 1, 29])\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 finite model; no claim of hardware timing or full file-format conformance. 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-pcm-caf-pcm-packet-table-packet-start-units","generated_at":"2026-09-29T14:45:00.828355+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"Offline PCM interchange uses these exact bounded packet and sample representation decisions.","repair":"Use the stated conversion contract at packet start units.","root_cause":"Packet offsets are reported as packet indices instead of sample positions.","sha256":"40b428aac6db8a2fde1d87804fe5845dd26a67e41fd8488847f4fe0d764e9580","title":"Caf pcm packet table: packet start units · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":42.65,"exit_code":1,"observations":[{"actual":[[2,3,4],[2,3],1,4],"check":"oracle 1","expected":[[2,3,4],[0,2],1,4],"passed":false},{"actual":[[4],[1,2,1],3,4],"check":"oracle 2","expected":[[4],[0,1,3],3,4],"passed":false},{"actual":[[3,4],[4],2,4],"check":"oracle 3","expected":[[3,4],[0],2,4],"passed":false},{"actual":[[],[],0,0],"check":"oracle 4","expected":[[],[],0,0],"passed":true},{"actual":[[1,2,3],[2,1],0,3],"check":"oracle 5","expected":[[1,2,3],[0,2],0,3],"passed":false},{"actual":[[2,3],[3,2],1,3],"check":"oracle 6","expected":[[2,3],[0,3],1,3],"passed":false},{"actual":[[7],[0,1,0],0,1],"check":"oracle 7","expected":[[7],[0,0,1],0,1],"passed":false},{"actual":[[2,3,4,5,1,2,3,4],[2,3,2,3],1,9],"check":"variant packet 1","expected":[[2,3,4,5,1,2,3,4],[0,2,5,7],1,9],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"oracle 1\", \"actual\": [[2, 3, 4], [2, 3], 1, 4], \"expected\": [[2, 3, 4], [0, 2], 1, 4], \"passed\": false}, {\"check\": \"oracle 2\", \"actual\": [[4], [1, 2, 1], 3, 4], \"expected\": [[4], [0, 1, 3], 3, 4], \"passed\": false}, {\"check\": \"oracle 3\", \"actual\": [[3, 4], [4], 2, 4], \"expected\": [[3, 4], [0], 2, 4], \"passed\": false}, {\"check\": \"oracle 4\", \"actual\": [[], [], 0, 0], \"expected\": [[], [], 0, 0], \"passed\": true}, {\"check\": \"oracle 5\", \"actual\": [[1, 2, 3], [2, 1], 0, 3], \"expected\": [[1, 2, 3], [0, 2], 0, 3], \"passed\": false}, {\"check\": \"oracle 6\", \"actual\": [[2, 3], [3, 2], 1, 3], \"expected\": [[2, 3], [0, 3], 1, 3], \"passed\": false}, {\"check\": \"oracle 7\", \"actual\": [[7], [0, 1, 0], 0, 1], \"expected\": [[7], [0, 0, 1], 0, 1], \"passed\": false}, {\"check\": \"variant packet 1\", \"actual\": [[2, 3, 4, 5, 1, 2, 3, 4], [2, 3, 2, 3], 1, 9], \"expected\": [[2, 3, 4, 5, 1, 2, 3, 4], [0, 2, 5, 7], 1, 9], \"passed\": false}], \"passed\": false}\n"},"broken":{"elapsed_ms":41.745,"exit_code":1,"observations":[{"actual":[[2,3,4],[0,1],1,4],"check":"oracle 1","expected":[[2,3,4],[0,2],1,4],"passed":false},{"actual":[[4],[0,1,2],3,4],"check":"oracle 2","expected":[[4],[0,1,3],3,4],"passed":false},{"actual":[[3,4],[0],2,4],"check":"oracle 3","expected":[[3,4],[0],2,4],"passed":true},{"actual":[[],[],0,0],"check":"oracle 4","expected":[[],[],0,0],"passed":true},{"actual":[[1,2,3],[0,1],0,3],"check":"oracle 5","expected":[[1,2,3],[0,2],0,3],"passed":false},{"actual":[[2,3],[0,1],1,3],"check":"oracle 6","expected":[[2,3],[0,3],1,3],"passed":false},{"actual":[[7],[0,1,2],0,1],"check":"oracle 7","expected":[[7],[0,0,1],0,1],"passed":false},{"actual":[[2,3,4,5,1,2,3,4],[0,1,2,3],1,9],"check":"variant packet 1","expected":[[2,3,4,5,1,2,3,4],[0,2,5,7],1,9],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"oracle 1\", \"actual\": [[2, 3, 4], [0, 1], 1, 4], \"expected\": [[2, 3, 4], [0, 2], 1, 4], \"passed\": false}, {\"check\": \"oracle 2\", \"actual\": [[4], [0, 1, 2], 3, 4], \"expected\": [[4], [0, 1, 3], 3, 4], \"passed\": false}, {\"check\": \"oracle 3\", \"actual\": [[3, 4], [0], 2, 4], \"expected\": [[3, 4], [0], 2, 4], \"passed\": true}, {\"check\": \"oracle 4\", \"actual\": [[], [], 0, 0], \"expected\": [[], [], 0, 0], \"passed\": true}, {\"check\": \"oracle 5\", \"actual\": [[1, 2, 3], [0, 1], 0, 3], \"expected\": [[1, 2, 3], [0, 2], 0, 3], \"passed\": false}, {\"check\": \"oracle 6\", \"actual\": [[2, 3], [0, 1], 1, 3], \"expected\": [[2, 3], [0, 3], 1, 3], \"passed\": false}, {\"check\": \"oracle 7\", \"actual\": [[7], [0, 1, 2], 0, 1], \"expected\": [[7], [0, 0, 1], 0, 1], \"passed\": false}, {\"check\": \"variant packet 1\", \"actual\": [[2, 3, 4, 5, 1, 2, 3, 4], [0, 1, 2, 3], 1, 9], \"expected\": [[2, 3, 4, 5, 1, 2, 3, 4], [0, 2, 5, 7], 1, 9], \"passed\": false}], \"passed\": false}\n"},"fixed":{"elapsed_ms":44.539,"exit_code":0,"observations":[{"actual":[[2,3,4],[0,2],1,4],"check":"oracle 1","expected":[[2,3,4],[0,2],1,4],"passed":true},{"actual":[[4],[0,1,3],3,4],"check":"oracle 2","expected":[[4],[0,1,3],3,4],"passed":true},{"actual":[[3,4],[0],2,4],"check":"oracle 3","expected":[[3,4],[0],2,4],"passed":true},{"actual":[[],[],0,0],"check":"oracle 4","expected":[[],[],0,0],"passed":true},{"actual":[[1,2,3],[0,2],0,3],"check":"oracle 5","expected":[[1,2,3],[0,2],0,3],"passed":true},{"actual":[[2,3],[0,3],1,3],"check":"oracle 6","expected":[[2,3],[0,3],1,3],"passed":true},{"actual":[[7],[0,0,1],0,1],"check":"oracle 7","expected":[[7],[0,0,1],0,1],"passed":true},{"actual":[[2,3,4,5,1,2,3,4],[0,2,5,7],1,9],"check":"variant packet 1","expected":[[2,3,4,5,1,2,3,4],[0,2,5,7],1,9],"passed":true}],"passed":true,"stderr":"","stdout":"{\"observations\": [{\"check\": \"oracle 1\", \"actual\": [[2, 3, 4], [0, 2], 1, 4], \"expected\": [[2, 3, 4], [0, 2], 1, 4], \"passed\": true}, {\"check\": \"oracle 2\", \"actual\": [[4], [0, 1, 3], 3, 4], \"expected\": [[4], [0, 1, 3], 3, 4], \"passed\": true}, {\"check\": \"oracle 3\", \"actual\": [[3, 4], [0], 2, 4], \"expected\": [[3, 4], [0], 2, 4], \"passed\": true}, {\"check\": \"oracle 4\", \"actual\": [[], [], 0, 0], \"expected\": [[], [], 0, 0], \"passed\": true}, {\"check\": \"oracle 5\", \"actual\": [[1, 2, 3], [0, 2], 0, 3], \"expected\": [[1, 2, 3], [0, 2], 0, 3], \"passed\": true}, {\"check\": \"oracle 6\", \"actual\": [[2, 3], [0, 3], 1, 3], \"expected\": [[2, 3], [0, 3], 1, 3], \"passed\": true}, {\"check\": \"oracle 7\", \"actual\": [[7], [0, 0, 1], 0, 1], \"expected\": [[7], [0, 0, 1], 0, 1], \"passed\": true}, {\"check\": \"variant packet 1\", \"actual\": [[2, 3, 4, 5, 1, 2, 3, 4], [0, 2, 5, 7], 1, 9], \"expected\": [[2, 3, 4, 5, 1, 2, 3, 4], [0, 2, 5, 7], 1, 9], \"passed\": true}], \"passed\": true}\n"}},"verified":true,"visibility":"public"}