{"abstract":"Annotation/header bytes are decoded as PCM payload.","category":"PCM sample encoding","checks":8,"contract":"Locate a bounded AU-like PCM byte body at an absolute data offset; -1 alone means unknown size, and incomplete frame bytes are returned separately.","evaluation_group":"s3-pcm-au-pcm-payload-limit","failed_approach":"Skipping an extra frame drops valid initial samples.","family":"s3-pcm-au-pcm-payload-limit-absolute-data-offset","id":"FA-49541","implementations":{"attempt":{"sha256":"b338f3a60fd5bf038d866e989ff5a021cee4da4b66d2f406e21cbdb79468d95c","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(buffers, offset, declared, frame_bytes):\n    out=[]\n    for blob in buffers:\n        body=blob[min(offset+frame_bytes,len(blob)):]\n        body=body if declared==-1 else body[:max(0,declared)]\n        complete=(len(body)//frame_bytes)*frame_bytes\n        out.append([body[:complete],body[complete:]])\n    return out\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('oracle 1', solve(*([[9, 9, 1, 2, 3, 4, 5]], 2, -1, 2)), [[[1, 2, 3, 4], [5]]])\ncheck('oracle 2', solve(*([[0, 1, 2, 3, 4]], 1, 3, 2)), [[[1, 2], [3]]])\ncheck('oracle 3', solve(*([[0, 1, 2]], 1, 0, 1)), [[[], []]])\ncheck('oracle 4', solve(*([[]], 4, -1, 2)), [[[], []]])\ncheck('oracle 5', solve(*([], 2, 4, 2)), [])\ncheck('oracle 6', solve(*([[9, 1, 2, 3, 4]], 1, 8, 3)), [[[1, 2, 3], [4]]])\ncheck('oracle 7', solve(*([[9, 1, 2, 3]], 1, 2, 2)), [[[1, 2], []]])\nif N == 1: check('variant packet 1', solve(*[[[9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5]], 2, -1, 2]), [[[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]]])\nif N == 2: check('variant packet 2', solve(*[[[9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5]], 2, -1, 2]), [[[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]]])\nif N == 3: check('variant packet 3', solve(*[[[9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5]], 2, -1, 2]), [[[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]]])\nif N == 4: check('variant packet 4', solve(*[[[9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5]], 2, -1, 2]), [[[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]]])\nif N == 5: check('variant packet 5', solve(*[[[9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5]], 2, -1, 2]), [[[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]]])\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":"716375ea64b4b1555d038be9afd9d9afb77eccaa51fe476a2edf6e9b396c08bd","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(buffers, offset, declared, frame_bytes):\n    out=[]\n    for blob in buffers:\n        body=blob[:]\n        body=body if declared==-1 else body[:max(0,declared)]\n        complete=(len(body)//frame_bytes)*frame_bytes\n        out.append([body[:complete],body[complete:]])\n    return out\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('oracle 1', solve(*([[9, 9, 1, 2, 3, 4, 5]], 2, -1, 2)), [[[1, 2, 3, 4], [5]]])\ncheck('oracle 2', solve(*([[0, 1, 2, 3, 4]], 1, 3, 2)), [[[1, 2], [3]]])\ncheck('oracle 3', solve(*([[0, 1, 2]], 1, 0, 1)), [[[], []]])\ncheck('oracle 4', solve(*([[]], 4, -1, 2)), [[[], []]])\ncheck('oracle 5', solve(*([], 2, 4, 2)), [])\ncheck('oracle 6', solve(*([[9, 1, 2, 3, 4]], 1, 8, 3)), [[[1, 2, 3], [4]]])\ncheck('oracle 7', solve(*([[9, 1, 2, 3]], 1, 2, 2)), [[[1, 2], []]])\nif N == 1: check('variant packet 1', solve(*[[[9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5]], 2, -1, 2]), [[[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]]])\nif N == 2: check('variant packet 2', solve(*[[[9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5]], 2, -1, 2]), [[[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]]])\nif N == 3: check('variant packet 3', solve(*[[[9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5]], 2, -1, 2]), [[[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]]])\nif N == 4: check('variant packet 4', solve(*[[[9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5]], 2, -1, 2]), [[[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]]])\nif N == 5: check('variant packet 5', solve(*[[[9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5]], 2, -1, 2]), [[[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]]])\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":"0fb99f5b04c89acbe750d6feae85b0a236640b195410e6893b751858ed4eb861","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(buffers, offset, declared, frame_bytes):\n    out=[]\n    for blob in buffers:\n        body=blob[min(offset,len(blob)):]\n        body=body if declared==-1 else body[:max(0,declared)]\n        complete=(len(body)//frame_bytes)*frame_bytes\n        out.append([body[:complete],body[complete:]])\n    return out\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('oracle 1', solve(*([[9, 9, 1, 2, 3, 4, 5]], 2, -1, 2)), [[[1, 2, 3, 4], [5]]])\ncheck('oracle 2', solve(*([[0, 1, 2, 3, 4]], 1, 3, 2)), [[[1, 2], [3]]])\ncheck('oracle 3', solve(*([[0, 1, 2]], 1, 0, 1)), [[[], []]])\ncheck('oracle 4', solve(*([[]], 4, -1, 2)), [[[], []]])\ncheck('oracle 5', solve(*([], 2, 4, 2)), [])\ncheck('oracle 6', solve(*([[9, 1, 2, 3, 4]], 1, 8, 3)), [[[1, 2, 3], [4]]])\ncheck('oracle 7', solve(*([[9, 1, 2, 3]], 1, 2, 2)), [[[1, 2], []]])\nif N == 1: check('variant packet 1', solve(*[[[9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5]], 2, -1, 2]), [[[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]]])\nif N == 2: check('variant packet 2', solve(*[[[9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5]], 2, -1, 2]), [[[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]]])\nif N == 3: check('variant packet 3', solve(*[[[9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5]], 2, -1, 2]), [[[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]]])\nif N == 4: check('variant packet 4', solve(*[[[9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5]], 2, -1, 2]), [[[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]]])\nif N == 5: check('variant packet 5', solve(*[[[9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5]], 2, -1, 2]), [[[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]]])\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-au-pcm-payload-limit-absolute-data-offset","generated_at":"2026-09-29T14:45:00.954308+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 absolute data offset.","root_cause":"Annotation/header bytes are decoded as PCM payload.","sha256":"b8c893692188d802653a084ce71ce3062763d76fa0321e07bd34450bcdd1524b","title":"Au pcm payload limit: absolute data offset · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":41.613,"exit_code":1,"observations":[{"actual":[[[3,4],[5]]],"check":"oracle 1","expected":[[[1,2,3,4],[5]]],"passed":false},{"actual":[[[3,4],[]]],"check":"oracle 2","expected":[[[1,2],[3]]],"passed":false},{"actual":[[[],[]]],"check":"oracle 3","expected":[[[],[]]],"passed":true},{"actual":[[[],[]]],"check":"oracle 4","expected":[[[],[]]],"passed":true},{"actual":[],"check":"oracle 5","expected":[],"passed":true},{"actual":[[[],[4]]],"check":"oracle 6","expected":[[[1,2,3],[4]]],"passed":false},{"actual":[[[],[3]]],"check":"oracle 7","expected":[[[1,2],[]]],"passed":false},{"actual":[[[3,4],[5]],[[3,4],[5]]],"check":"variant packet 1","expected":[[[1,2,3,4],[5]],[[1,2,3,4],[5]]],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"oracle 1\", \"actual\": [[[3, 4], [5]]], \"expected\": [[[1, 2, 3, 4], [5]]], \"passed\": false}, {\"check\": \"oracle 2\", \"actual\": [[[3, 4], []]], \"expected\": [[[1, 2], [3]]], \"passed\": false}, {\"check\": \"oracle 3\", \"actual\": [[[], []]], \"expected\": [[[], []]], \"passed\": true}, {\"check\": \"oracle 4\", \"actual\": [[[], []]], \"expected\": [[[], []]], \"passed\": true}, {\"check\": \"oracle 5\", \"actual\": [], \"expected\": [], \"passed\": true}, {\"check\": \"oracle 6\", \"actual\": [[[], [4]]], \"expected\": [[[1, 2, 3], [4]]], \"passed\": false}, {\"check\": \"oracle 7\", \"actual\": [[[], [3]]], \"expected\": [[[1, 2], []]], \"passed\": false}, {\"check\": \"variant packet 1\", \"actual\": [[[3, 4], [5]], [[3, 4], [5]]], \"expected\": [[[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]]], \"passed\": false}], \"passed\": false}\n"},"broken":{"elapsed_ms":38.665,"exit_code":1,"observations":[{"actual":[[[9,9,1,2,3,4],[5]]],"check":"oracle 1","expected":[[[1,2,3,4],[5]]],"passed":false},{"actual":[[[0,1],[2]]],"check":"oracle 2","expected":[[[1,2],[3]]],"passed":false},{"actual":[[[],[]]],"check":"oracle 3","expected":[[[],[]]],"passed":true},{"actual":[[[],[]]],"check":"oracle 4","expected":[[[],[]]],"passed":true},{"actual":[],"check":"oracle 5","expected":[],"passed":true},{"actual":[[[9,1,2],[3,4]]],"check":"oracle 6","expected":[[[1,2,3],[4]]],"passed":false},{"actual":[[[9,1],[]]],"check":"oracle 7","expected":[[[1,2],[]]],"passed":false},{"actual":[[[9,9,1,2,3,4],[5]],[[9,9,1,2,3,4],[5]]],"check":"variant packet 1","expected":[[[1,2,3,4],[5]],[[1,2,3,4],[5]]],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"oracle 1\", \"actual\": [[[9, 9, 1, 2, 3, 4], [5]]], \"expected\": [[[1, 2, 3, 4], [5]]], \"passed\": false}, {\"check\": \"oracle 2\", \"actual\": [[[0, 1], [2]]], \"expected\": [[[1, 2], [3]]], \"passed\": false}, {\"check\": \"oracle 3\", \"actual\": [[[], []]], \"expected\": [[[], []]], \"passed\": true}, {\"check\": \"oracle 4\", \"actual\": [[[], []]], \"expected\": [[[], []]], \"passed\": true}, {\"check\": \"oracle 5\", \"actual\": [], \"expected\": [], \"passed\": true}, {\"check\": \"oracle 6\", \"actual\": [[[9, 1, 2], [3, 4]]], \"expected\": [[[1, 2, 3], [4]]], \"passed\": false}, {\"check\": \"oracle 7\", \"actual\": [[[9, 1], []]], \"expected\": [[[1, 2], []]], \"passed\": false}, {\"check\": \"variant packet 1\", \"actual\": [[[9, 9, 1, 2, 3, 4], [5]], [[9, 9, 1, 2, 3, 4], [5]]], \"expected\": [[[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]]], \"passed\": false}], \"passed\": false}\n"},"fixed":{"elapsed_ms":42.019,"exit_code":0,"observations":[{"actual":[[[1,2,3,4],[5]]],"check":"oracle 1","expected":[[[1,2,3,4],[5]]],"passed":true},{"actual":[[[1,2],[3]]],"check":"oracle 2","expected":[[[1,2],[3]]],"passed":true},{"actual":[[[],[]]],"check":"oracle 3","expected":[[[],[]]],"passed":true},{"actual":[[[],[]]],"check":"oracle 4","expected":[[[],[]]],"passed":true},{"actual":[],"check":"oracle 5","expected":[],"passed":true},{"actual":[[[1,2,3],[4]]],"check":"oracle 6","expected":[[[1,2,3],[4]]],"passed":true},{"actual":[[[1,2],[]]],"check":"oracle 7","expected":[[[1,2],[]]],"passed":true},{"actual":[[[1,2,3,4],[5]],[[1,2,3,4],[5]]],"check":"variant packet 1","expected":[[[1,2,3,4],[5]],[[1,2,3,4],[5]]],"passed":true}],"passed":true,"stderr":"","stdout":"{\"observations\": [{\"check\": \"oracle 1\", \"actual\": [[[1, 2, 3, 4], [5]]], \"expected\": [[[1, 2, 3, 4], [5]]], \"passed\": true}, {\"check\": \"oracle 2\", \"actual\": [[[1, 2], [3]]], \"expected\": [[[1, 2], [3]]], \"passed\": true}, {\"check\": \"oracle 3\", \"actual\": [[[], []]], \"expected\": [[[], []]], \"passed\": true}, {\"check\": \"oracle 4\", \"actual\": [[[], []]], \"expected\": [[[], []]], \"passed\": true}, {\"check\": \"oracle 5\", \"actual\": [], \"expected\": [], \"passed\": true}, {\"check\": \"oracle 6\", \"actual\": [[[1, 2, 3], [4]]], \"expected\": [[[1, 2, 3], [4]]], \"passed\": true}, {\"check\": \"oracle 7\", \"actual\": [[[1, 2], []]], \"expected\": [[[1, 2], []]], \"passed\": true}, {\"check\": \"variant packet 1\", \"actual\": [[[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]]], \"expected\": [[[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]]], \"passed\": true}], \"passed\": true}\n"}},"verified":true,"visibility":"public"}