{"abstract":"Visibility records are returned in front-to-back traversal order rather than original submission order.","category":"Raster clipping","checks":11,"contract":"Draws are supplied back to front as ID, coverage set, opaque flag, clip set and sample-write-enable set. Visibility traverses front to back, subtracting only front opaque written samples. Transparent draws remain visible but do not occlude. Return every draw in original order, including empty visibility, labeled by ID. Repeated IDs are distinct draws. All coverage is finite-target bounded.","evaluation_group":"s3-raster-clipping-opaque-occlusion-clip","failed_approach":"Sorting results by ID fails for repeated IDs and nonalphabetic submission order.","family":"s3-raster-clipping-opaque-occlusion-clip-return-order","id":"FA-51366","implementations":{"attempt":{"sha256":"d38ee25e11cb6d86a64c407a856ea12ec9a125aafcdf21c9da6c9fa912b4ec17","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(commands, size):\n    full=set(range(size))\n    out=[]\n    for draws in commands:\n        occluded=set()\n        visible=[]\n        for key,coverage,opaque,clip,writes in reversed(draws):\n            effective=set(coverage)&set(clip)&set(writes)&full\n            remaining=effective-occluded\n            visible.append([key,sorted(remaining)])\n            if opaque: occluded |= effective\n        out.append(sorted(visible,key=lambda row:row[0]))\n    return out\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nif N == 1:\n    check('explicit sequence 0', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [1], True, [1], [1]]]], 4), [[['back', [0]], ['front', [1]]]])\n    check('explicit sequence 1', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], False, [0, 1], [0, 1]]]], 4), [[['back', [0, 1]], ['front', [0, 1]]]])\n    check('explicit sequence 2', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], True, [0], [0, 1]]]], 4), [[['back', [1]], ['front', [0]]]])\n    check('explicit sequence 3', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], True, [0, 1], [0]]]], 4), [[['back', [1]], ['front', [0]]]])\n    check('explicit sequence 4', solve([[['back', [0], True, [0], [0]], ['front', [1], True, [1], [1]]]], 4), [[['back', [0]], ['front', [1]]]])\n    check('explicit sequence 5', solve([[['back', [0, 1, 2], True, [0, 1, 2], [0, 1, 2]], ['middle', [0], True, [0], [0]], ['front', [1], True, [1], [1]]]], 4), [[['back', [2]], ['middle', [0]], ['front', [1]]]])\n    check('explicit sequence 6', solve([[['z', [0], False, [0], [0]], ['a', [1], False, [1], [1]]]], 4), [[['z', [0]], ['a', [1]]]])\n    check('explicit sequence 7', solve([[['a', [0], False, [], [0]], ['b', [1], True, [1], [1]]]], 4), [[['a', []], ['b', [1]]]])\n    check('explicit sequence 8', solve([[['same', [0], False, [0], [0]], ['same', [1], False, [1], [1]]]], 4), [[['same', [0]], ['same', [1]]]])\n    check('explicit sequence 9', solve([[['a', [0], True, [0], []]]], 4), [[['a', []]]])\n    check('explicit sequence 10', solve([[['a', [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], True, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]]]], 4), [[['a', [0, 1, 2, 3]]]])\nif N == 2:\n    check('explicit sequence 0', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [1], True, [1], [1]]]], 5), [[['back', [0]], ['front', [1]]]])\n    check('explicit sequence 1', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], False, [0, 1], [0, 1]]]], 5), [[['back', [0, 1]], ['front', [0, 1]]]])\n    check('explicit sequence 2', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], True, [0], [0, 1]]]], 5), [[['back', [1]], ['front', [0]]]])\n    check('explicit sequence 3', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], True, [0, 1], [0]]]], 5), [[['back', [1]], ['front', [0]]]])\n    check('explicit sequence 4', solve([[['back', [0], True, [0], [0]], ['front', [1], True, [1], [1]]]], 5), [[['back', [0]], ['front', [1]]]])\n    check('explicit sequence 5', solve([[['back', [0, 1, 2], True, [0, 1, 2], [0, 1, 2]], ['middle', [0], True, [0], [0]], ['front', [1], True, [1], [1]]]], 5), [[['back', [2]], ['middle', [0]], ['front', [1]]]])\n    check('explicit sequence 6', solve([[['z', [0], False, [0], [0]], ['a', [1], False, [1], [1]]]], 5), [[['z', [0]], ['a', [1]]]])\n    check('explicit sequence 7', solve([[['a', [0], False, [], [0]], ['b', [1], True, [1], [1]]]], 5), [[['a', []], ['b', [1]]]])\n    check('explicit sequence 8', solve([[['same', [0], False, [0], [0]], ['same', [1], False, [1], [1]]]], 5), [[['same', [0]], ['same', [1]]]])\n    check('explicit sequence 9', solve([[['a', [0], True, [0], []]]], 5), [[['a', []]]])\n    check('explicit sequence 10', solve([[['a', [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], True, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]]]], 5), [[['a', [0, 1, 2, 3, 4]]]])\nif N == 3:\n    check('explicit sequence 0', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [1], True, [1], [1]]]], 6), [[['back', [0]], ['front', [1]]]])\n    check('explicit sequence 1', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], False, [0, 1], [0, 1]]]], 6), [[['back', [0, 1]], ['front', [0, 1]]]])\n    check('explicit sequence 2', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], True, [0], [0, 1]]]], 6), [[['back', [1]], ['front', [0]]]])\n    check('explicit sequence 3', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], True, [0, 1], [0]]]], 6), [[['back', [1]], ['front', [0]]]])\n    check('explicit sequence 4', solve([[['back', [0], True, [0], [0]], ['front', [1], True, [1], [1]]]], 6), [[['back', [0]], ['front', [1]]]])\n    check('explicit sequence 5', solve([[['back', [0, 1, 2], True, [0, 1, 2], [0, 1, 2]], ['middle', [0], True, [0], [0]], ['front', [1], True, [1], [1]]]], 6), [[['back', [2]], ['middle', [0]], ['front', [1]]]])\n    check('explicit sequence 6', solve([[['z', [0], False, [0], [0]], ['a', [1], False, [1], [1]]]], 6), [[['z', [0]], ['a', [1]]]])\n    check('explicit sequence 7', solve([[['a', [0], False, [], [0]], ['b', [1], True, [1], [1]]]], 6), [[['a', []], ['b', [1]]]])\n    check('explicit sequence 8', solve([[['same', [0], False, [0], [0]], ['same', [1], False, [1], [1]]]], 6), [[['same', [0]], ['same', [1]]]])\n    check('explicit sequence 9', solve([[['a', [0], True, [0], []]]], 6), [[['a', []]]])\n    check('explicit sequence 10', solve([[['a', [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], True, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]]]], 6), [[['a', [0, 1, 2, 3, 4, 5]]]])\nif N == 4:\n    check('explicit sequence 0', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [1], True, [1], [1]]]], 7), [[['back', [0]], ['front', [1]]]])\n    check('explicit sequence 1', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], False, [0, 1], [0, 1]]]], 7), [[['back', [0, 1]], ['front', [0, 1]]]])\n    check('explicit sequence 2', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], True, [0], [0, 1]]]], 7), [[['back', [1]], ['front', [0]]]])\n    check('explicit sequence 3', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], True, [0, 1], [0]]]], 7), [[['back', [1]], ['front', [0]]]])\n    check('explicit sequence 4', solve([[['back', [0], True, [0], [0]], ['front', [1], True, [1], [1]]]], 7), [[['back', [0]], ['front', [1]]]])\n    check('explicit sequence 5', solve([[['back', [0, 1, 2], True, [0, 1, 2], [0, 1, 2]], ['middle', [0], True, [0], [0]], ['front', [1], True, [1], [1]]]], 7), [[['back', [2]], ['middle', [0]], ['front', [1]]]])\n    check('explicit sequence 6', solve([[['z', [0], False, [0], [0]], ['a', [1], False, [1], [1]]]], 7), [[['z', [0]], ['a', [1]]]])\n    check('explicit sequence 7', solve([[['a', [0], False, [], [0]], ['b', [1], True, [1], [1]]]], 7), [[['a', []], ['b', [1]]]])\n    check('explicit sequence 8', solve([[['same', [0], False, [0], [0]], ['same', [1], False, [1], [1]]]], 7), [[['same', [0]], ['same', [1]]]])\n    check('explicit sequence 9', solve([[['a', [0], True, [0], []]]], 7), [[['a', []]]])\n    check('explicit sequence 10', solve([[['a', [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], True, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]]]], 7), [[['a', [0, 1, 2, 3, 4, 5, 6]]]])\nif N == 5:\n    check('explicit sequence 0', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [1], True, [1], [1]]]], 8), [[['back', [0]], ['front', [1]]]])\n    check('explicit sequence 1', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], False, [0, 1], [0, 1]]]], 8), [[['back', [0, 1]], ['front', [0, 1]]]])\n    check('explicit sequence 2', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], True, [0], [0, 1]]]], 8), [[['back', [1]], ['front', [0]]]])\n    check('explicit sequence 3', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], True, [0, 1], [0]]]], 8), [[['back', [1]], ['front', [0]]]])\n    check('explicit sequence 4', solve([[['back', [0], True, [0], [0]], ['front', [1], True, [1], [1]]]], 8), [[['back', [0]], ['front', [1]]]])\n    check('explicit sequence 5', solve([[['back', [0, 1, 2], True, [0, 1, 2], [0, 1, 2]], ['middle', [0], True, [0], [0]], ['front', [1], True, [1], [1]]]], 8), [[['back', [2]], ['middle', [0]], ['front', [1]]]])\n    check('explicit sequence 6', solve([[['z', [0], False, [0], [0]], ['a', [1], False, [1], [1]]]], 8), [[['z', [0]], ['a', [1]]]])\n    check('explicit sequence 7', solve([[['a', [0], False, [], [0]], ['b', [1], True, [1], [1]]]], 8), [[['a', []], ['b', [1]]]])\n    check('explicit sequence 8', solve([[['same', [0], False, [0], [0]], ['same', [1], False, [1], [1]]]], 8), [[['same', [0]], ['same', [1]]]])\n    check('explicit sequence 9', solve([[['a', [0], True, [0], []]]], 8), [[['a', []]]])\n    check('explicit sequence 10', solve([[['a', [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], True, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]]]], 8), [[['a', [0, 1, 2, 3, 4, 5, 6, 7]]]])\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":"362d01b72bba4f1b484aa9fb4f7af4c91ca2e98958dece08394bd04aa2d22396","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(commands, size):\n    full=set(range(size))\n    out=[]\n    for draws in commands:\n        occluded=set()\n        visible=[]\n        for key,coverage,opaque,clip,writes in reversed(draws):\n            effective=set(coverage)&set(clip)&set(writes)&full\n            remaining=effective-occluded\n            visible.append([key,sorted(remaining)])\n            if opaque: occluded |= effective\n        out.append(visible)\n    return out\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nif N == 1:\n    check('explicit sequence 0', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [1], True, [1], [1]]]], 4), [[['back', [0]], ['front', [1]]]])\n    check('explicit sequence 1', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], False, [0, 1], [0, 1]]]], 4), [[['back', [0, 1]], ['front', [0, 1]]]])\n    check('explicit sequence 2', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], True, [0], [0, 1]]]], 4), [[['back', [1]], ['front', [0]]]])\n    check('explicit sequence 3', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], True, [0, 1], [0]]]], 4), [[['back', [1]], ['front', [0]]]])\n    check('explicit sequence 4', solve([[['back', [0], True, [0], [0]], ['front', [1], True, [1], [1]]]], 4), [[['back', [0]], ['front', [1]]]])\n    check('explicit sequence 5', solve([[['back', [0, 1, 2], True, [0, 1, 2], [0, 1, 2]], ['middle', [0], True, [0], [0]], ['front', [1], True, [1], [1]]]], 4), [[['back', [2]], ['middle', [0]], ['front', [1]]]])\n    check('explicit sequence 6', solve([[['z', [0], False, [0], [0]], ['a', [1], False, [1], [1]]]], 4), [[['z', [0]], ['a', [1]]]])\n    check('explicit sequence 7', solve([[['a', [0], False, [], [0]], ['b', [1], True, [1], [1]]]], 4), [[['a', []], ['b', [1]]]])\n    check('explicit sequence 8', solve([[['same', [0], False, [0], [0]], ['same', [1], False, [1], [1]]]], 4), [[['same', [0]], ['same', [1]]]])\n    check('explicit sequence 9', solve([[['a', [0], True, [0], []]]], 4), [[['a', []]]])\n    check('explicit sequence 10', solve([[['a', [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], True, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]]]], 4), [[['a', [0, 1, 2, 3]]]])\nif N == 2:\n    check('explicit sequence 0', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [1], True, [1], [1]]]], 5), [[['back', [0]], ['front', [1]]]])\n    check('explicit sequence 1', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], False, [0, 1], [0, 1]]]], 5), [[['back', [0, 1]], ['front', [0, 1]]]])\n    check('explicit sequence 2', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], True, [0], [0, 1]]]], 5), [[['back', [1]], ['front', [0]]]])\n    check('explicit sequence 3', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], True, [0, 1], [0]]]], 5), [[['back', [1]], ['front', [0]]]])\n    check('explicit sequence 4', solve([[['back', [0], True, [0], [0]], ['front', [1], True, [1], [1]]]], 5), [[['back', [0]], ['front', [1]]]])\n    check('explicit sequence 5', solve([[['back', [0, 1, 2], True, [0, 1, 2], [0, 1, 2]], ['middle', [0], True, [0], [0]], ['front', [1], True, [1], [1]]]], 5), [[['back', [2]], ['middle', [0]], ['front', [1]]]])\n    check('explicit sequence 6', solve([[['z', [0], False, [0], [0]], ['a', [1], False, [1], [1]]]], 5), [[['z', [0]], ['a', [1]]]])\n    check('explicit sequence 7', solve([[['a', [0], False, [], [0]], ['b', [1], True, [1], [1]]]], 5), [[['a', []], ['b', [1]]]])\n    check('explicit sequence 8', solve([[['same', [0], False, [0], [0]], ['same', [1], False, [1], [1]]]], 5), [[['same', [0]], ['same', [1]]]])\n    check('explicit sequence 9', solve([[['a', [0], True, [0], []]]], 5), [[['a', []]]])\n    check('explicit sequence 10', solve([[['a', [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], True, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]]]], 5), [[['a', [0, 1, 2, 3, 4]]]])\nif N == 3:\n    check('explicit sequence 0', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [1], True, [1], [1]]]], 6), [[['back', [0]], ['front', [1]]]])\n    check('explicit sequence 1', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], False, [0, 1], [0, 1]]]], 6), [[['back', [0, 1]], ['front', [0, 1]]]])\n    check('explicit sequence 2', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], True, [0], [0, 1]]]], 6), [[['back', [1]], ['front', [0]]]])\n    check('explicit sequence 3', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], True, [0, 1], [0]]]], 6), [[['back', [1]], ['front', [0]]]])\n    check('explicit sequence 4', solve([[['back', [0], True, [0], [0]], ['front', [1], True, [1], [1]]]], 6), [[['back', [0]], ['front', [1]]]])\n    check('explicit sequence 5', solve([[['back', [0, 1, 2], True, [0, 1, 2], [0, 1, 2]], ['middle', [0], True, [0], [0]], ['front', [1], True, [1], [1]]]], 6), [[['back', [2]], ['middle', [0]], ['front', [1]]]])\n    check('explicit sequence 6', solve([[['z', [0], False, [0], [0]], ['a', [1], False, [1], [1]]]], 6), [[['z', [0]], ['a', [1]]]])\n    check('explicit sequence 7', solve([[['a', [0], False, [], [0]], ['b', [1], True, [1], [1]]]], 6), [[['a', []], ['b', [1]]]])\n    check('explicit sequence 8', solve([[['same', [0], False, [0], [0]], ['same', [1], False, [1], [1]]]], 6), [[['same', [0]], ['same', [1]]]])\n    check('explicit sequence 9', solve([[['a', [0], True, [0], []]]], 6), [[['a', []]]])\n    check('explicit sequence 10', solve([[['a', [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], True, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]]]], 6), [[['a', [0, 1, 2, 3, 4, 5]]]])\nif N == 4:\n    check('explicit sequence 0', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [1], True, [1], [1]]]], 7), [[['back', [0]], ['front', [1]]]])\n    check('explicit sequence 1', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], False, [0, 1], [0, 1]]]], 7), [[['back', [0, 1]], ['front', [0, 1]]]])\n    check('explicit sequence 2', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], True, [0], [0, 1]]]], 7), [[['back', [1]], ['front', [0]]]])\n    check('explicit sequence 3', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], True, [0, 1], [0]]]], 7), [[['back', [1]], ['front', [0]]]])\n    check('explicit sequence 4', solve([[['back', [0], True, [0], [0]], ['front', [1], True, [1], [1]]]], 7), [[['back', [0]], ['front', [1]]]])\n    check('explicit sequence 5', solve([[['back', [0, 1, 2], True, [0, 1, 2], [0, 1, 2]], ['middle', [0], True, [0], [0]], ['front', [1], True, [1], [1]]]], 7), [[['back', [2]], ['middle', [0]], ['front', [1]]]])\n    check('explicit sequence 6', solve([[['z', [0], False, [0], [0]], ['a', [1], False, [1], [1]]]], 7), [[['z', [0]], ['a', [1]]]])\n    check('explicit sequence 7', solve([[['a', [0], False, [], [0]], ['b', [1], True, [1], [1]]]], 7), [[['a', []], ['b', [1]]]])\n    check('explicit sequence 8', solve([[['same', [0], False, [0], [0]], ['same', [1], False, [1], [1]]]], 7), [[['same', [0]], ['same', [1]]]])\n    check('explicit sequence 9', solve([[['a', [0], True, [0], []]]], 7), [[['a', []]]])\n    check('explicit sequence 10', solve([[['a', [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], True, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]]]], 7), [[['a', [0, 1, 2, 3, 4, 5, 6]]]])\nif N == 5:\n    check('explicit sequence 0', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [1], True, [1], [1]]]], 8), [[['back', [0]], ['front', [1]]]])\n    check('explicit sequence 1', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], False, [0, 1], [0, 1]]]], 8), [[['back', [0, 1]], ['front', [0, 1]]]])\n    check('explicit sequence 2', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], True, [0], [0, 1]]]], 8), [[['back', [1]], ['front', [0]]]])\n    check('explicit sequence 3', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], True, [0, 1], [0]]]], 8), [[['back', [1]], ['front', [0]]]])\n    check('explicit sequence 4', solve([[['back', [0], True, [0], [0]], ['front', [1], True, [1], [1]]]], 8), [[['back', [0]], ['front', [1]]]])\n    check('explicit sequence 5', solve([[['back', [0, 1, 2], True, [0, 1, 2], [0, 1, 2]], ['middle', [0], True, [0], [0]], ['front', [1], True, [1], [1]]]], 8), [[['back', [2]], ['middle', [0]], ['front', [1]]]])\n    check('explicit sequence 6', solve([[['z', [0], False, [0], [0]], ['a', [1], False, [1], [1]]]], 8), [[['z', [0]], ['a', [1]]]])\n    check('explicit sequence 7', solve([[['a', [0], False, [], [0]], ['b', [1], True, [1], [1]]]], 8), [[['a', []], ['b', [1]]]])\n    check('explicit sequence 8', solve([[['same', [0], False, [0], [0]], ['same', [1], False, [1], [1]]]], 8), [[['same', [0]], ['same', [1]]]])\n    check('explicit sequence 9', solve([[['a', [0], True, [0], []]]], 8), [[['a', []]]])\n    check('explicit sequence 10', solve([[['a', [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], True, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]]]], 8), [[['a', [0, 1, 2, 3, 4, 5, 6, 7]]]])\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":"6169de50c1291df6dc0b60fa03bafcdbcbf6458d702f440d60d51429b6a89c9a","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(commands, size):\n    full=set(range(size))\n    out=[]\n    for draws in commands:\n        occluded=set()\n        visible=[]\n        for key,coverage,opaque,clip,writes in reversed(draws):\n            effective=set(coverage)&set(clip)&set(writes)&full\n            remaining=effective-occluded\n            visible.append([key,sorted(remaining)])\n            if opaque: occluded |= effective\n        out.append(list(reversed(visible)))\n    return out\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nif N == 1:\n    check('explicit sequence 0', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [1], True, [1], [1]]]], 4), [[['back', [0]], ['front', [1]]]])\n    check('explicit sequence 1', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], False, [0, 1], [0, 1]]]], 4), [[['back', [0, 1]], ['front', [0, 1]]]])\n    check('explicit sequence 2', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], True, [0], [0, 1]]]], 4), [[['back', [1]], ['front', [0]]]])\n    check('explicit sequence 3', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], True, [0, 1], [0]]]], 4), [[['back', [1]], ['front', [0]]]])\n    check('explicit sequence 4', solve([[['back', [0], True, [0], [0]], ['front', [1], True, [1], [1]]]], 4), [[['back', [0]], ['front', [1]]]])\n    check('explicit sequence 5', solve([[['back', [0, 1, 2], True, [0, 1, 2], [0, 1, 2]], ['middle', [0], True, [0], [0]], ['front', [1], True, [1], [1]]]], 4), [[['back', [2]], ['middle', [0]], ['front', [1]]]])\n    check('explicit sequence 6', solve([[['z', [0], False, [0], [0]], ['a', [1], False, [1], [1]]]], 4), [[['z', [0]], ['a', [1]]]])\n    check('explicit sequence 7', solve([[['a', [0], False, [], [0]], ['b', [1], True, [1], [1]]]], 4), [[['a', []], ['b', [1]]]])\n    check('explicit sequence 8', solve([[['same', [0], False, [0], [0]], ['same', [1], False, [1], [1]]]], 4), [[['same', [0]], ['same', [1]]]])\n    check('explicit sequence 9', solve([[['a', [0], True, [0], []]]], 4), [[['a', []]]])\n    check('explicit sequence 10', solve([[['a', [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], True, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]]]], 4), [[['a', [0, 1, 2, 3]]]])\nif N == 2:\n    check('explicit sequence 0', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [1], True, [1], [1]]]], 5), [[['back', [0]], ['front', [1]]]])\n    check('explicit sequence 1', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], False, [0, 1], [0, 1]]]], 5), [[['back', [0, 1]], ['front', [0, 1]]]])\n    check('explicit sequence 2', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], True, [0], [0, 1]]]], 5), [[['back', [1]], ['front', [0]]]])\n    check('explicit sequence 3', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], True, [0, 1], [0]]]], 5), [[['back', [1]], ['front', [0]]]])\n    check('explicit sequence 4', solve([[['back', [0], True, [0], [0]], ['front', [1], True, [1], [1]]]], 5), [[['back', [0]], ['front', [1]]]])\n    check('explicit sequence 5', solve([[['back', [0, 1, 2], True, [0, 1, 2], [0, 1, 2]], ['middle', [0], True, [0], [0]], ['front', [1], True, [1], [1]]]], 5), [[['back', [2]], ['middle', [0]], ['front', [1]]]])\n    check('explicit sequence 6', solve([[['z', [0], False, [0], [0]], ['a', [1], False, [1], [1]]]], 5), [[['z', [0]], ['a', [1]]]])\n    check('explicit sequence 7', solve([[['a', [0], False, [], [0]], ['b', [1], True, [1], [1]]]], 5), [[['a', []], ['b', [1]]]])\n    check('explicit sequence 8', solve([[['same', [0], False, [0], [0]], ['same', [1], False, [1], [1]]]], 5), [[['same', [0]], ['same', [1]]]])\n    check('explicit sequence 9', solve([[['a', [0], True, [0], []]]], 5), [[['a', []]]])\n    check('explicit sequence 10', solve([[['a', [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], True, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]]]], 5), [[['a', [0, 1, 2, 3, 4]]]])\nif N == 3:\n    check('explicit sequence 0', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [1], True, [1], [1]]]], 6), [[['back', [0]], ['front', [1]]]])\n    check('explicit sequence 1', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], False, [0, 1], [0, 1]]]], 6), [[['back', [0, 1]], ['front', [0, 1]]]])\n    check('explicit sequence 2', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], True, [0], [0, 1]]]], 6), [[['back', [1]], ['front', [0]]]])\n    check('explicit sequence 3', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], True, [0, 1], [0]]]], 6), [[['back', [1]], ['front', [0]]]])\n    check('explicit sequence 4', solve([[['back', [0], True, [0], [0]], ['front', [1], True, [1], [1]]]], 6), [[['back', [0]], ['front', [1]]]])\n    check('explicit sequence 5', solve([[['back', [0, 1, 2], True, [0, 1, 2], [0, 1, 2]], ['middle', [0], True, [0], [0]], ['front', [1], True, [1], [1]]]], 6), [[['back', [2]], ['middle', [0]], ['front', [1]]]])\n    check('explicit sequence 6', solve([[['z', [0], False, [0], [0]], ['a', [1], False, [1], [1]]]], 6), [[['z', [0]], ['a', [1]]]])\n    check('explicit sequence 7', solve([[['a', [0], False, [], [0]], ['b', [1], True, [1], [1]]]], 6), [[['a', []], ['b', [1]]]])\n    check('explicit sequence 8', solve([[['same', [0], False, [0], [0]], ['same', [1], False, [1], [1]]]], 6), [[['same', [0]], ['same', [1]]]])\n    check('explicit sequence 9', solve([[['a', [0], True, [0], []]]], 6), [[['a', []]]])\n    check('explicit sequence 10', solve([[['a', [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], True, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]]]], 6), [[['a', [0, 1, 2, 3, 4, 5]]]])\nif N == 4:\n    check('explicit sequence 0', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [1], True, [1], [1]]]], 7), [[['back', [0]], ['front', [1]]]])\n    check('explicit sequence 1', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], False, [0, 1], [0, 1]]]], 7), [[['back', [0, 1]], ['front', [0, 1]]]])\n    check('explicit sequence 2', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], True, [0], [0, 1]]]], 7), [[['back', [1]], ['front', [0]]]])\n    check('explicit sequence 3', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], True, [0, 1], [0]]]], 7), [[['back', [1]], ['front', [0]]]])\n    check('explicit sequence 4', solve([[['back', [0], True, [0], [0]], ['front', [1], True, [1], [1]]]], 7), [[['back', [0]], ['front', [1]]]])\n    check('explicit sequence 5', solve([[['back', [0, 1, 2], True, [0, 1, 2], [0, 1, 2]], ['middle', [0], True, [0], [0]], ['front', [1], True, [1], [1]]]], 7), [[['back', [2]], ['middle', [0]], ['front', [1]]]])\n    check('explicit sequence 6', solve([[['z', [0], False, [0], [0]], ['a', [1], False, [1], [1]]]], 7), [[['z', [0]], ['a', [1]]]])\n    check('explicit sequence 7', solve([[['a', [0], False, [], [0]], ['b', [1], True, [1], [1]]]], 7), [[['a', []], ['b', [1]]]])\n    check('explicit sequence 8', solve([[['same', [0], False, [0], [0]], ['same', [1], False, [1], [1]]]], 7), [[['same', [0]], ['same', [1]]]])\n    check('explicit sequence 9', solve([[['a', [0], True, [0], []]]], 7), [[['a', []]]])\n    check('explicit sequence 10', solve([[['a', [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], True, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]]]], 7), [[['a', [0, 1, 2, 3, 4, 5, 6]]]])\nif N == 5:\n    check('explicit sequence 0', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [1], True, [1], [1]]]], 8), [[['back', [0]], ['front', [1]]]])\n    check('explicit sequence 1', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], False, [0, 1], [0, 1]]]], 8), [[['back', [0, 1]], ['front', [0, 1]]]])\n    check('explicit sequence 2', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], True, [0], [0, 1]]]], 8), [[['back', [1]], ['front', [0]]]])\n    check('explicit sequence 3', solve([[['back', [0, 1], True, [0, 1], [0, 1]], ['front', [0, 1], True, [0, 1], [0]]]], 8), [[['back', [1]], ['front', [0]]]])\n    check('explicit sequence 4', solve([[['back', [0], True, [0], [0]], ['front', [1], True, [1], [1]]]], 8), [[['back', [0]], ['front', [1]]]])\n    check('explicit sequence 5', solve([[['back', [0, 1, 2], True, [0, 1, 2], [0, 1, 2]], ['middle', [0], True, [0], [0]], ['front', [1], True, [1], [1]]]], 8), [[['back', [2]], ['middle', [0]], ['front', [1]]]])\n    check('explicit sequence 6', solve([[['z', [0], False, [0], [0]], ['a', [1], False, [1], [1]]]], 8), [[['z', [0]], ['a', [1]]]])\n    check('explicit sequence 7', solve([[['a', [0], False, [], [0]], ['b', [1], True, [1], [1]]]], 8), [[['a', []], ['b', [1]]]])\n    check('explicit sequence 8', solve([[['same', [0], False, [0], [0]], ['same', [1], False, [1], [1]]]], 8), [[['same', [0]], ['same', [1]]]])\n    check('explicit sequence 9', solve([[['a', [0], True, [0], []]]], 8), [[['a', []]]])\n    check('explicit sequence 10', solve([[['a', [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], True, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]]]], 8), [[['a', [0, 1, 2, 3, 4, 5, 6, 7]]]])\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":"Finite one-dimensional integer sample sets model coverage state only; no geometric intersection, memory layout, GPU or graphics-standard conformance is claimed. 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-raster-clipping-opaque-occlusion-clip-return-order","generated_at":"2026-09-29T14:45:18.213532+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"Raster clip state can leak coverage across draws even when every individual region is valid.","repair":"Apply the documented state transition at return order. Draws are supplied back to front as ID, coverage set, opaque flag, clip set and sample-write-enable set. Visibility traverses front to back, subtracting only front opaque written samples. Transparent draws remain visible but do not occlude. Return every draw in original order, including empty visibility, labeled by ID. Repeated IDs are distinct draws. All coverage is finite-target bounded.","root_cause":"Visibility records are returned in front-to-back traversal order rather than original submission order.","sha256":"b023e06b30917d931341af2754d6826efe7249b94e5a46769e6045f796246674","title":"Opaque occlusion clip: return order · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":43.664,"exit_code":1,"observations":[{"actual":[[["back",[0]],["front",[1]]]],"check":"explicit sequence 0","expected":[[["back",[0]],["front",[1]]]],"passed":true},{"actual":[[["back",[0,1]],["front",[0,1]]]],"check":"explicit sequence 1","expected":[[["back",[0,1]],["front",[0,1]]]],"passed":true},{"actual":[[["back",[1]],["front",[0]]]],"check":"explicit sequence 2","expected":[[["back",[1]],["front",[0]]]],"passed":true},{"actual":[[["back",[1]],["front",[0]]]],"check":"explicit sequence 3","expected":[[["back",[1]],["front",[0]]]],"passed":true},{"actual":[[["back",[0]],["front",[1]]]],"check":"explicit sequence 4","expected":[[["back",[0]],["front",[1]]]],"passed":true},{"actual":[[["back",[2]],["front",[1]],["middle",[0]]]],"check":"explicit sequence 5","expected":[[["back",[2]],["middle",[0]],["front",[1]]]],"passed":false},{"actual":[[["a",[1]],["z",[0]]]],"check":"explicit sequence 6","expected":[[["z",[0]],["a",[1]]]],"passed":false},{"actual":[[["a",[]],["b",[1]]]],"check":"explicit sequence 7","expected":[[["a",[]],["b",[1]]]],"passed":true},{"actual":[[["same",[1]],["same",[0]]]],"check":"explicit sequence 8","expected":[[["same",[0]],["same",[1]]]],"passed":false},{"actual":[[["a",[]]]],"check":"explicit sequence 9","expected":[[["a",[]]]],"passed":true},{"actual":[[["a",[0,1,2,3]]]],"check":"explicit sequence 10","expected":[[["a",[0,1,2,3]]]],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"explicit sequence 0\", \"actual\": [[[\"back\", [0]], [\"front\", [1]]]], \"expected\": [[[\"back\", [0]], [\"front\", [1]]]], \"passed\": true}, {\"check\": \"explicit sequence 1\", \"actual\": [[[\"back\", [0, 1]], [\"front\", [0, 1]]]], \"expected\": [[[\"back\", [0, 1]], [\"front\", [0, 1]]]], \"passed\": true}, {\"check\": \"explicit sequence 2\", \"actual\": [[[\"back\", [1]], [\"front\", [0]]]], \"expected\": [[[\"back\", [1]], [\"front\", [0]]]], \"passed\": true}, {\"check\": \"explicit sequence 3\", \"actual\": [[[\"back\", [1]], [\"front\", [0]]]], \"expected\": [[[\"back\", [1]], [\"front\", [0]]]], \"passed\": true}, {\"check\": \"explicit sequence 4\", \"actual\": [[[\"back\", [0]], [\"front\", [1]]]], \"expected\": [[[\"back\", [0]], [\"front\", [1]]]], \"passed\": true}, {\"check\": \"explicit sequence 5\", \"actual\": [[[\"back\", [2]], [\"front\", [1]], [\"middle\", [0]]]], \"expected\": [[[\"back\", [2]], [\"middle\", [0]], [\"front\", [1]]]], \"passed\": false}, {\"check\": \"explicit sequence 6\", \"actual\": [[[\"a\", [1]], [\"z\", [0]]]], \"expected\": [[[\"z\", [0]], [\"a\", [1]]]], \"passed\": false}, {\"check\": \"explicit sequence 7\", \"actual\": [[[\"a\", []], [\"b\", [1]]]], \"expected\": [[[\"a\", []], [\"b\", [1]]]], \"passed\": true}, {\"check\": \"explicit sequence 8\", \"actual\": [[[\"same\", [1]], [\"same\", [0]]]], \"expected\": [[[\"same\", [0]], [\"same\", [1]]]], \"passed\": false}, {\"check\": \"explicit sequence 9\", \"actual\": [[[\"a\", []]]], \"expected\": [[[\"a\", []]]], \"passed\": true}, {\"check\": \"explicit sequence 10\", \"actual\": [[[\"a\", [0, 1, 2, 3]]]], \"expected\": [[[\"a\", [0, 1, 2, 3]]]], \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":40.62,"exit_code":1,"observations":[{"actual":[[["front",[1]],["back",[0]]]],"check":"explicit sequence 0","expected":[[["back",[0]],["front",[1]]]],"passed":false},{"actual":[[["front",[0,1]],["back",[0,1]]]],"check":"explicit sequence 1","expected":[[["back",[0,1]],["front",[0,1]]]],"passed":false},{"actual":[[["front",[0]],["back",[1]]]],"check":"explicit sequence 2","expected":[[["back",[1]],["front",[0]]]],"passed":false},{"actual":[[["front",[0]],["back",[1]]]],"check":"explicit sequence 3","expected":[[["back",[1]],["front",[0]]]],"passed":false},{"actual":[[["front",[1]],["back",[0]]]],"check":"explicit sequence 4","expected":[[["back",[0]],["front",[1]]]],"passed":false},{"actual":[[["front",[1]],["middle",[0]],["back",[2]]]],"check":"explicit sequence 5","expected":[[["back",[2]],["middle",[0]],["front",[1]]]],"passed":false},{"actual":[[["a",[1]],["z",[0]]]],"check":"explicit sequence 6","expected":[[["z",[0]],["a",[1]]]],"passed":false},{"actual":[[["b",[1]],["a",[]]]],"check":"explicit sequence 7","expected":[[["a",[]],["b",[1]]]],"passed":false},{"actual":[[["same",[1]],["same",[0]]]],"check":"explicit sequence 8","expected":[[["same",[0]],["same",[1]]]],"passed":false},{"actual":[[["a",[]]]],"check":"explicit sequence 9","expected":[[["a",[]]]],"passed":true},{"actual":[[["a",[0,1,2,3]]]],"check":"explicit sequence 10","expected":[[["a",[0,1,2,3]]]],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"explicit sequence 0\", \"actual\": [[[\"front\", [1]], [\"back\", [0]]]], \"expected\": [[[\"back\", [0]], [\"front\", [1]]]], \"passed\": false}, {\"check\": \"explicit sequence 1\", \"actual\": [[[\"front\", [0, 1]], [\"back\", [0, 1]]]], \"expected\": [[[\"back\", [0, 1]], [\"front\", [0, 1]]]], \"passed\": false}, {\"check\": \"explicit sequence 2\", \"actual\": [[[\"front\", [0]], [\"back\", [1]]]], \"expected\": [[[\"back\", [1]], [\"front\", [0]]]], \"passed\": false}, {\"check\": \"explicit sequence 3\", \"actual\": [[[\"front\", [0]], [\"back\", [1]]]], \"expected\": [[[\"back\", [1]], [\"front\", [0]]]], \"passed\": false}, {\"check\": \"explicit sequence 4\", \"actual\": [[[\"front\", [1]], [\"back\", [0]]]], \"expected\": [[[\"back\", [0]], [\"front\", [1]]]], \"passed\": false}, {\"check\": \"explicit sequence 5\", \"actual\": [[[\"front\", [1]], [\"middle\", [0]], [\"back\", [2]]]], \"expected\": [[[\"back\", [2]], [\"middle\", [0]], [\"front\", [1]]]], \"passed\": false}, {\"check\": \"explicit sequence 6\", \"actual\": [[[\"a\", [1]], [\"z\", [0]]]], \"expected\": [[[\"z\", [0]], [\"a\", [1]]]], \"passed\": false}, {\"check\": \"explicit sequence 7\", \"actual\": [[[\"b\", [1]], [\"a\", []]]], \"expected\": [[[\"a\", []], [\"b\", [1]]]], \"passed\": false}, {\"check\": \"explicit sequence 8\", \"actual\": [[[\"same\", [1]], [\"same\", [0]]]], \"expected\": [[[\"same\", [0]], [\"same\", [1]]]], \"passed\": false}, {\"check\": \"explicit sequence 9\", \"actual\": [[[\"a\", []]]], \"expected\": [[[\"a\", []]]], \"passed\": true}, {\"check\": \"explicit sequence 10\", \"actual\": [[[\"a\", [0, 1, 2, 3]]]], \"expected\": [[[\"a\", [0, 1, 2, 3]]]], \"passed\": true}], \"passed\": false}\n"},"fixed":{"elapsed_ms":44.729,"exit_code":0,"observations":[{"actual":[[["back",[0]],["front",[1]]]],"check":"explicit sequence 0","expected":[[["back",[0]],["front",[1]]]],"passed":true},{"actual":[[["back",[0,1]],["front",[0,1]]]],"check":"explicit sequence 1","expected":[[["back",[0,1]],["front",[0,1]]]],"passed":true},{"actual":[[["back",[1]],["front",[0]]]],"check":"explicit sequence 2","expected":[[["back",[1]],["front",[0]]]],"passed":true},{"actual":[[["back",[1]],["front",[0]]]],"check":"explicit sequence 3","expected":[[["back",[1]],["front",[0]]]],"passed":true},{"actual":[[["back",[0]],["front",[1]]]],"check":"explicit sequence 4","expected":[[["back",[0]],["front",[1]]]],"passed":true},{"actual":[[["back",[2]],["middle",[0]],["front",[1]]]],"check":"explicit sequence 5","expected":[[["back",[2]],["middle",[0]],["front",[1]]]],"passed":true},{"actual":[[["z",[0]],["a",[1]]]],"check":"explicit sequence 6","expected":[[["z",[0]],["a",[1]]]],"passed":true},{"actual":[[["a",[]],["b",[1]]]],"check":"explicit sequence 7","expected":[[["a",[]],["b",[1]]]],"passed":true},{"actual":[[["same",[0]],["same",[1]]]],"check":"explicit sequence 8","expected":[[["same",[0]],["same",[1]]]],"passed":true},{"actual":[[["a",[]]]],"check":"explicit sequence 9","expected":[[["a",[]]]],"passed":true},{"actual":[[["a",[0,1,2,3]]]],"check":"explicit sequence 10","expected":[[["a",[0,1,2,3]]]],"passed":true}],"passed":true,"stderr":"","stdout":"{\"observations\": [{\"check\": \"explicit sequence 0\", \"actual\": [[[\"back\", [0]], [\"front\", [1]]]], \"expected\": [[[\"back\", [0]], [\"front\", [1]]]], \"passed\": true}, {\"check\": \"explicit sequence 1\", \"actual\": [[[\"back\", [0, 1]], [\"front\", [0, 1]]]], \"expected\": [[[\"back\", [0, 1]], [\"front\", [0, 1]]]], \"passed\": true}, {\"check\": \"explicit sequence 2\", \"actual\": [[[\"back\", [1]], [\"front\", [0]]]], \"expected\": [[[\"back\", [1]], [\"front\", [0]]]], \"passed\": true}, {\"check\": \"explicit sequence 3\", \"actual\": [[[\"back\", [1]], [\"front\", [0]]]], \"expected\": [[[\"back\", [1]], [\"front\", [0]]]], \"passed\": true}, {\"check\": \"explicit sequence 4\", \"actual\": [[[\"back\", [0]], [\"front\", [1]]]], \"expected\": [[[\"back\", [0]], [\"front\", [1]]]], \"passed\": true}, {\"check\": \"explicit sequence 5\", \"actual\": [[[\"back\", [2]], [\"middle\", [0]], [\"front\", [1]]]], \"expected\": [[[\"back\", [2]], [\"middle\", [0]], [\"front\", [1]]]], \"passed\": true}, {\"check\": \"explicit sequence 6\", \"actual\": [[[\"z\", [0]], [\"a\", [1]]]], \"expected\": [[[\"z\", [0]], [\"a\", [1]]]], \"passed\": true}, {\"check\": \"explicit sequence 7\", \"actual\": [[[\"a\", []], [\"b\", [1]]]], \"expected\": [[[\"a\", []], [\"b\", [1]]]], \"passed\": true}, {\"check\": \"explicit sequence 8\", \"actual\": [[[\"same\", [0]], [\"same\", [1]]]], \"expected\": [[[\"same\", [0]], [\"same\", [1]]]], \"passed\": true}, {\"check\": \"explicit sequence 9\", \"actual\": [[[\"a\", []]]], \"expected\": [[[\"a\", []]]], \"passed\": true}, {\"check\": \"explicit sequence 10\", \"actual\": [[[\"a\", [0, 1, 2, 3]]]], \"expected\": [[[\"a\", [0, 1, 2, 3]]]], \"passed\": true}], \"passed\": true}\n"}},"verified":true,"visibility":"public"}