{"abstract":"Coordinated local cycle timer returns a wrong result when end-of-green offsets are shifted in the wrong direction.","category":"Traffic signal timing plans","checks":8,"contract":"Input {cycle, offset, master, splits: [[phase, split s]] in sequence starting with the coordinated phase, yellow, red, ref}. Splits must sum to the cycle, else 'bad-splits'. Local time = (master - offset) mod cycle, where the offset marks the start of coordinated green (ref 'begin') or the end of coordinated green (ref 'end'). Each split is green then yellow then all-red. Return [phase, interval, seconds remaining].","evaluation_group":"w2-traffic_signal_timing_plans-coord-timer","failed_approach":"Adding the whole split includes the yellow and all-red, overshooting by the clearance time.","family":"w2-traffic_signal_timing_plans-coord-timer-end-reference","id":"FA-68031","implementations":{"attempt":{"sha256":"b18f15f78d9116152d4c9c938d890e4014bca1634da8a477c84bbd84c02694cb","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(x):\n    C = x['cycle']\n    sp = x['splits']\n    y, r = x['yellow'], x['red']\n    if sum(s for _, s in sp) != C:\n        return 'bad-splits'\n    lc = (x['master'] - x['offset']) % C\n    if x['ref'] == 'end':\n        lc = (lc + sp[0][1]) % C\n    start = 0\n    for ph, s in sp:\n        ge = start + s - y - r\n        if lc < ge:\n            return [ph, 'green', ge - lc]\n        if lc < ge + y:\n            return [ph, 'yellow', ge + y - lc]\n        if lc < start + s:\n            return [ph, 'red', start + s - lc]\n        start += s\n    return ['free', 'dark', 0]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[({'cycle': 105, 'offset': 35, 'master': 4, 'splits': [[2, 37], [4, 29], [6, 39]], 'yellow': 4, 'red': 1, 'ref': 'begin'}, [6, 'green', 26]), ({'cycle': 116, 'offset': 95, 'master': 503, 'splits': [[2, 32], [4, 37], [6, 31], [8, 16]], 'yellow': 3, 'red': 1, 'ref': 'begin'}, [4, 'green', 5]), ({'cycle': 80, 'offset': 70, 'master': 10, 'splits': [[2, 50], [4, 30]], 'yellow': 3, 'red': 2, 'ref': 'begin'}, [2, 'green', 25]), ({'cycle': 46, 'offset': 4, 'master': 249, 'splits': [[2, 15], [4, 31]], 'yellow': 3, 'red': 1, 'ref': 'begin'}, [4, 'green', 27]), ({'cycle': 90, 'offset': 30, 'master': 45, 'splits': [[2, 40], [4, 25], [6, 25]], 'yellow': 4, 'red': 1, 'ref': 'end'}, [4, 'green', 10]), ({'cycle': 100, 'offset': 5, 'master': 3, 'splits': [[2, 50], [4, 30], [8, 25]], 'yellow': 4, 'red': 2, 'ref': 'begin'}, 'bad-splits'), ({'cycle': 74, 'offset': 17, 'master': 890, 'splits': [[2, 21], [4, 29], [6, 24]], 'yellow': 4, 'red': 2, 'ref': 'end'}, [2, 'green', 15]), ({'cycle': 126, 'offset': 79, 'master': 132, 'splits': [[2, 32], [4, 37], [6, 40], [8, 17]], 'yellow': 3, 'red': 2, 'ref': 'end'}, [6, 'green', 24])], [({'cycle': 84, 'offset': 40, 'master': 210, 'splits': [[2, 39], [4, 14], [6, 31]], 'yellow': 3, 'red': 2, 'ref': 'begin'}, [2, 'green', 32]), ({'cycle': 90, 'offset': 30, 'master': 45, 'splits': [[2, 40], [4, 25], [6, 25]], 'yellow': 4, 'red': 1, 'ref': 'end'}, [4, 'green', 10]), ({'cycle': 39, 'offset': 16, 'master': 927, 'splits': [[2, 16], [4, 23]], 'yellow': 4, 'red': 1, 'ref': 'begin'}, [2, 'yellow', 1]), ({'cycle': 80, 'offset': 70, 'master': 10, 'splits': [[2, 50], [4, 30]], 'yellow': 3, 'red': 2, 'ref': 'begin'}, [2, 'green', 25]), ({'cycle': 44, 'offset': 26, 'master': 566, 'splits': [[2, 32], [4, 12]], 'yellow': 4, 'red': 1, 'ref': 'end'}, [4, 'yellow', 4]), ({'cycle': 100, 'offset': 5, 'master': 3, 'splits': [[2, 50], [4, 30], [8, 25]], 'yellow': 4, 'red': 2, 'ref': 'begin'}, 'bad-splits'), ({'cycle': 94, 'offset': 81, 'master': 161, 'splits': [[2, 32], [4, 26], [6, 36]], 'yellow': 3, 'red': 2, 'ref': 'end'}, [2, 'green', 14]), ({'cycle': 56, 'offset': 16, 'master': 493, 'splits': [[2, 27], [4, 29]], 'yellow': 4, 'red': 2, 'ref': 'begin'}, [4, 'green', 21])], [({'cycle': 69, 'offset': 41, 'master': 89, 'splits': [[2, 30], [4, 39]], 'yellow': 4, 'red': 1, 'ref': 'begin'}, [4, 'green', 16]), ({'cycle': 56, 'offset': 17, 'master': 73, 'splits': [[2, 25], [4, 31]], 'yellow': 4, 'red': 1, 'ref': 'end'}, [2, 'yellow', 4]), ({'cycle': 105, 'offset': 65, 'master': 94, 'splits': [[2, 32], [4, 20], [6, 33], [8, 15]], 'yellow': 4, 'red': 1, 'ref': 'end'}, 'bad-splits'), ({'cycle': 43, 'offset': 9, 'master': 403, 'splits': [[2, 15], [4, 28]], 'yellow': 4, 'red': 1, 'ref': 'begin'}, [2, 'green', 3]), ({'cycle': 102, 'offset': 65, 'master': 146, 'splits': [[2, 29], [4, 16], [6, 27], [8, 30]], 'yellow': 3, 'red': 2, 'ref': 'end'}, [2, 'green', 21]), ({'cycle': 90, 'offset': 30, 'master': 45, 'splits': [[2, 40], [4, 25], [6, 25]], 'yellow': 4, 'red': 1, 'ref': 'end'}, [4, 'green', 10]), ({'cycle': 100, 'offset': 5, 'master': 3, 'splits': [[2, 50], [4, 30], [8, 25]], 'yellow': 4, 'red': 2, 'ref': 'begin'}, 'bad-splits'), ({'cycle': 80, 'offset': 70, 'master': 10, 'splits': [[2, 50], [4, 30]], 'yellow': 3, 'red': 2, 'ref': 'begin'}, [2, 'green', 25])], [({'cycle': 99, 'offset': 95, 'master': 689, 'splits': [[2, 39], [4, 32], [6, 28]], 'yellow': 4, 'red': 1, 'ref': 'begin'}, [2, 'green', 34]), ({'cycle': 69, 'offset': 37, 'master': 680, 'splits': [[2, 31], [4, 38]], 'yellow': 3, 'red': 2, 'ref': 'end'}, [4, 'green', 16]), ({'cycle': 78, 'offset': 0, 'master': 597, 'splits': [[2, 27], [4, 16], [6, 35]], 'yellow': 4, 'red': 2, 'ref': 'begin'}, [6, 'green', 21]), ({'cycle': 80, 'offset': 70, 'master': 10, 'splits': [[2, 50], [4, 30]], 'yellow': 3, 'red': 2, 'ref': 'begin'}, [2, 'green', 25]), ({'cycle': 90, 'offset': 30, 'master': 45, 'splits': [[2, 40], [4, 25], [6, 25]], 'yellow': 4, 'red': 1, 'ref': 'end'}, [4, 'green', 10]), ({'cycle': 72, 'offset': 22, 'master': 392, 'splits': [[2, 23], [4, 30], [6, 19]], 'yellow': 3, 'red': 2, 'ref': 'end'}, [4, 'green', 20]), ({'cycle': 72, 'offset': 34, 'master': 687, 'splits': [[2, 32], [4, 40]], 'yellow': 4, 'red': 2, 'ref': 'end'}, [2, 'red', 1]), ({'cycle': 100, 'offset': 5, 'master': 3, 'splits': [[2, 50], [4, 30], [8, 25]], 'yellow': 4, 'red': 2, 'ref': 'begin'}, 'bad-splits')], [({'cycle': 80, 'offset': 70, 'master': 10, 'splits': [[2, 50], [4, 30]], 'yellow': 3, 'red': 2, 'ref': 'begin'}, [2, 'green', 25]), ({'cycle': 70, 'offset': 26, 'master': 359, 'splits': [[2, 38], [4, 32]], 'yellow': 4, 'red': 1, 'ref': 'end'}, [2, 'green', 17]), ({'cycle': 90, 'offset': 30, 'master': 45, 'splits': [[2, 40], [4, 25], [6, 25]], 'yellow': 4, 'red': 1, 'ref': 'end'}, [4, 'green', 10]), ({'cycle': 112, 'offset': 45, 'master': 656, 'splits': [[2, 29], [4, 39], [6, 25], [8, 19]], 'yellow': 4, 'red': 2, 'ref': 'begin'}, [4, 'green', 11]), ({'cycle': 140, 'offset': 33, 'master': 792, 'splits': [[2, 35], [4, 37], [6, 35], [8, 33]], 'yellow': 3, 'red': 1, 'ref': 'end'}, [6, 'green', 13]), ({'cycle': 59, 'offset': 32, 'master': 537, 'splits': [[2, 21], [4, 18], [6, 20]], 'yellow': 4, 'red': 1, 'ref': 'begin'}, [4, 'green', 1]), ({'cycle': 100, 'offset': 5, 'master': 3, 'splits': [[2, 50], [4, 30], [8, 25]], 'yellow': 4, 'red': 2, 'ref': 'begin'}, 'bad-splits'), ({'cycle': 93, 'offset': 2, 'master': 972, 'splits': [[2, 40], [4, 36], [6, 17]], 'yellow': 3, 'red': 2, 'ref': 'end'}, [4, 'red', 1])]]\nfor i, (args, expected) in enumerate(fixtures[N-1]):\n    check('timing oracle' + ' %d' % i, solve(args), expected)\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":"5665023140ccdb01e131973464c8c4455a713e54962ec9c5af099f381661a7fb","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(x):\n    C = x['cycle']\n    sp = x['splits']\n    y, r = x['yellow'], x['red']\n    if sum(s for _, s in sp) != C:\n        return 'bad-splits'\n    lc = (x['master'] - x['offset']) % C\n    if x['ref'] == 'end':\n        lc = (lc - sp[0][1] + y + r) % C\n    start = 0\n    for ph, s in sp:\n        ge = start + s - y - r\n        if lc < ge:\n            return [ph, 'green', ge - lc]\n        if lc < ge + y:\n            return [ph, 'yellow', ge + y - lc]\n        if lc < start + s:\n            return [ph, 'red', start + s - lc]\n        start += s\n    return ['free', 'dark', 0]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[({'cycle': 105, 'offset': 35, 'master': 4, 'splits': [[2, 37], [4, 29], [6, 39]], 'yellow': 4, 'red': 1, 'ref': 'begin'}, [6, 'green', 26]), ({'cycle': 116, 'offset': 95, 'master': 503, 'splits': [[2, 32], [4, 37], [6, 31], [8, 16]], 'yellow': 3, 'red': 1, 'ref': 'begin'}, [4, 'green', 5]), ({'cycle': 80, 'offset': 70, 'master': 10, 'splits': [[2, 50], [4, 30]], 'yellow': 3, 'red': 2, 'ref': 'begin'}, [2, 'green', 25]), ({'cycle': 46, 'offset': 4, 'master': 249, 'splits': [[2, 15], [4, 31]], 'yellow': 3, 'red': 1, 'ref': 'begin'}, [4, 'green', 27]), ({'cycle': 90, 'offset': 30, 'master': 45, 'splits': [[2, 40], [4, 25], [6, 25]], 'yellow': 4, 'red': 1, 'ref': 'end'}, [4, 'green', 10]), ({'cycle': 100, 'offset': 5, 'master': 3, 'splits': [[2, 50], [4, 30], [8, 25]], 'yellow': 4, 'red': 2, 'ref': 'begin'}, 'bad-splits'), ({'cycle': 74, 'offset': 17, 'master': 890, 'splits': [[2, 21], [4, 29], [6, 24]], 'yellow': 4, 'red': 2, 'ref': 'end'}, [2, 'green', 15]), ({'cycle': 126, 'offset': 79, 'master': 132, 'splits': [[2, 32], [4, 37], [6, 40], [8, 17]], 'yellow': 3, 'red': 2, 'ref': 'end'}, [6, 'green', 24])], [({'cycle': 84, 'offset': 40, 'master': 210, 'splits': [[2, 39], [4, 14], [6, 31]], 'yellow': 3, 'red': 2, 'ref': 'begin'}, [2, 'green', 32]), ({'cycle': 90, 'offset': 30, 'master': 45, 'splits': [[2, 40], [4, 25], [6, 25]], 'yellow': 4, 'red': 1, 'ref': 'end'}, [4, 'green', 10]), ({'cycle': 39, 'offset': 16, 'master': 927, 'splits': [[2, 16], [4, 23]], 'yellow': 4, 'red': 1, 'ref': 'begin'}, [2, 'yellow', 1]), ({'cycle': 80, 'offset': 70, 'master': 10, 'splits': [[2, 50], [4, 30]], 'yellow': 3, 'red': 2, 'ref': 'begin'}, [2, 'green', 25]), ({'cycle': 44, 'offset': 26, 'master': 566, 'splits': [[2, 32], [4, 12]], 'yellow': 4, 'red': 1, 'ref': 'end'}, [4, 'yellow', 4]), ({'cycle': 100, 'offset': 5, 'master': 3, 'splits': [[2, 50], [4, 30], [8, 25]], 'yellow': 4, 'red': 2, 'ref': 'begin'}, 'bad-splits'), ({'cycle': 94, 'offset': 81, 'master': 161, 'splits': [[2, 32], [4, 26], [6, 36]], 'yellow': 3, 'red': 2, 'ref': 'end'}, [2, 'green', 14]), ({'cycle': 56, 'offset': 16, 'master': 493, 'splits': [[2, 27], [4, 29]], 'yellow': 4, 'red': 2, 'ref': 'begin'}, [4, 'green', 21])], [({'cycle': 69, 'offset': 41, 'master': 89, 'splits': [[2, 30], [4, 39]], 'yellow': 4, 'red': 1, 'ref': 'begin'}, [4, 'green', 16]), ({'cycle': 56, 'offset': 17, 'master': 73, 'splits': [[2, 25], [4, 31]], 'yellow': 4, 'red': 1, 'ref': 'end'}, [2, 'yellow', 4]), ({'cycle': 105, 'offset': 65, 'master': 94, 'splits': [[2, 32], [4, 20], [6, 33], [8, 15]], 'yellow': 4, 'red': 1, 'ref': 'end'}, 'bad-splits'), ({'cycle': 43, 'offset': 9, 'master': 403, 'splits': [[2, 15], [4, 28]], 'yellow': 4, 'red': 1, 'ref': 'begin'}, [2, 'green', 3]), ({'cycle': 102, 'offset': 65, 'master': 146, 'splits': [[2, 29], [4, 16], [6, 27], [8, 30]], 'yellow': 3, 'red': 2, 'ref': 'end'}, [2, 'green', 21]), ({'cycle': 90, 'offset': 30, 'master': 45, 'splits': [[2, 40], [4, 25], [6, 25]], 'yellow': 4, 'red': 1, 'ref': 'end'}, [4, 'green', 10]), ({'cycle': 100, 'offset': 5, 'master': 3, 'splits': [[2, 50], [4, 30], [8, 25]], 'yellow': 4, 'red': 2, 'ref': 'begin'}, 'bad-splits'), ({'cycle': 80, 'offset': 70, 'master': 10, 'splits': [[2, 50], [4, 30]], 'yellow': 3, 'red': 2, 'ref': 'begin'}, [2, 'green', 25])], [({'cycle': 99, 'offset': 95, 'master': 689, 'splits': [[2, 39], [4, 32], [6, 28]], 'yellow': 4, 'red': 1, 'ref': 'begin'}, [2, 'green', 34]), ({'cycle': 69, 'offset': 37, 'master': 680, 'splits': [[2, 31], [4, 38]], 'yellow': 3, 'red': 2, 'ref': 'end'}, [4, 'green', 16]), ({'cycle': 78, 'offset': 0, 'master': 597, 'splits': [[2, 27], [4, 16], [6, 35]], 'yellow': 4, 'red': 2, 'ref': 'begin'}, [6, 'green', 21]), ({'cycle': 80, 'offset': 70, 'master': 10, 'splits': [[2, 50], [4, 30]], 'yellow': 3, 'red': 2, 'ref': 'begin'}, [2, 'green', 25]), ({'cycle': 90, 'offset': 30, 'master': 45, 'splits': [[2, 40], [4, 25], [6, 25]], 'yellow': 4, 'red': 1, 'ref': 'end'}, [4, 'green', 10]), ({'cycle': 72, 'offset': 22, 'master': 392, 'splits': [[2, 23], [4, 30], [6, 19]], 'yellow': 3, 'red': 2, 'ref': 'end'}, [4, 'green', 20]), ({'cycle': 72, 'offset': 34, 'master': 687, 'splits': [[2, 32], [4, 40]], 'yellow': 4, 'red': 2, 'ref': 'end'}, [2, 'red', 1]), ({'cycle': 100, 'offset': 5, 'master': 3, 'splits': [[2, 50], [4, 30], [8, 25]], 'yellow': 4, 'red': 2, 'ref': 'begin'}, 'bad-splits')], [({'cycle': 80, 'offset': 70, 'master': 10, 'splits': [[2, 50], [4, 30]], 'yellow': 3, 'red': 2, 'ref': 'begin'}, [2, 'green', 25]), ({'cycle': 70, 'offset': 26, 'master': 359, 'splits': [[2, 38], [4, 32]], 'yellow': 4, 'red': 1, 'ref': 'end'}, [2, 'green', 17]), ({'cycle': 90, 'offset': 30, 'master': 45, 'splits': [[2, 40], [4, 25], [6, 25]], 'yellow': 4, 'red': 1, 'ref': 'end'}, [4, 'green', 10]), ({'cycle': 112, 'offset': 45, 'master': 656, 'splits': [[2, 29], [4, 39], [6, 25], [8, 19]], 'yellow': 4, 'red': 2, 'ref': 'begin'}, [4, 'green', 11]), ({'cycle': 140, 'offset': 33, 'master': 792, 'splits': [[2, 35], [4, 37], [6, 35], [8, 33]], 'yellow': 3, 'red': 1, 'ref': 'end'}, [6, 'green', 13]), ({'cycle': 59, 'offset': 32, 'master': 537, 'splits': [[2, 21], [4, 18], [6, 20]], 'yellow': 4, 'red': 1, 'ref': 'begin'}, [4, 'green', 1]), ({'cycle': 100, 'offset': 5, 'master': 3, 'splits': [[2, 50], [4, 30], [8, 25]], 'yellow': 4, 'red': 2, 'ref': 'begin'}, 'bad-splits'), ({'cycle': 93, 'offset': 2, 'master': 972, 'splits': [[2, 40], [4, 36], [6, 17]], 'yellow': 3, 'red': 2, 'ref': 'end'}, [4, 'red', 1])]]\nfor i, (args, expected) in enumerate(fixtures[N-1]):\n    check('timing oracle' + ' %d' % i, solve(args), expected)\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":"ec54c61642aee47ac5d768313aa9cfb9b779880f0fcbf0d0b3161be64c70f8bf","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(x):\n    C = x['cycle']\n    sp = x['splits']\n    y, r = x['yellow'], x['red']\n    if sum(s for _, s in sp) != C:\n        return 'bad-splits'\n    lc = (x['master'] - x['offset']) % C\n    if x['ref'] == 'end':\n        lc = (lc + sp[0][1] - y - r) % C\n    start = 0\n    for ph, s in sp:\n        ge = start + s - y - r\n        if lc < ge:\n            return [ph, 'green', ge - lc]\n        if lc < ge + y:\n            return [ph, 'yellow', ge + y - lc]\n        if lc < start + s:\n            return [ph, 'red', start + s - lc]\n        start += s\n    return ['free', 'dark', 0]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[({'cycle': 105, 'offset': 35, 'master': 4, 'splits': [[2, 37], [4, 29], [6, 39]], 'yellow': 4, 'red': 1, 'ref': 'begin'}, [6, 'green', 26]), ({'cycle': 116, 'offset': 95, 'master': 503, 'splits': [[2, 32], [4, 37], [6, 31], [8, 16]], 'yellow': 3, 'red': 1, 'ref': 'begin'}, [4, 'green', 5]), ({'cycle': 80, 'offset': 70, 'master': 10, 'splits': [[2, 50], [4, 30]], 'yellow': 3, 'red': 2, 'ref': 'begin'}, [2, 'green', 25]), ({'cycle': 46, 'offset': 4, 'master': 249, 'splits': [[2, 15], [4, 31]], 'yellow': 3, 'red': 1, 'ref': 'begin'}, [4, 'green', 27]), ({'cycle': 90, 'offset': 30, 'master': 45, 'splits': [[2, 40], [4, 25], [6, 25]], 'yellow': 4, 'red': 1, 'ref': 'end'}, [4, 'green', 10]), ({'cycle': 100, 'offset': 5, 'master': 3, 'splits': [[2, 50], [4, 30], [8, 25]], 'yellow': 4, 'red': 2, 'ref': 'begin'}, 'bad-splits'), ({'cycle': 74, 'offset': 17, 'master': 890, 'splits': [[2, 21], [4, 29], [6, 24]], 'yellow': 4, 'red': 2, 'ref': 'end'}, [2, 'green', 15]), ({'cycle': 126, 'offset': 79, 'master': 132, 'splits': [[2, 32], [4, 37], [6, 40], [8, 17]], 'yellow': 3, 'red': 2, 'ref': 'end'}, [6, 'green', 24])], [({'cycle': 84, 'offset': 40, 'master': 210, 'splits': [[2, 39], [4, 14], [6, 31]], 'yellow': 3, 'red': 2, 'ref': 'begin'}, [2, 'green', 32]), ({'cycle': 90, 'offset': 30, 'master': 45, 'splits': [[2, 40], [4, 25], [6, 25]], 'yellow': 4, 'red': 1, 'ref': 'end'}, [4, 'green', 10]), ({'cycle': 39, 'offset': 16, 'master': 927, 'splits': [[2, 16], [4, 23]], 'yellow': 4, 'red': 1, 'ref': 'begin'}, [2, 'yellow', 1]), ({'cycle': 80, 'offset': 70, 'master': 10, 'splits': [[2, 50], [4, 30]], 'yellow': 3, 'red': 2, 'ref': 'begin'}, [2, 'green', 25]), ({'cycle': 44, 'offset': 26, 'master': 566, 'splits': [[2, 32], [4, 12]], 'yellow': 4, 'red': 1, 'ref': 'end'}, [4, 'yellow', 4]), ({'cycle': 100, 'offset': 5, 'master': 3, 'splits': [[2, 50], [4, 30], [8, 25]], 'yellow': 4, 'red': 2, 'ref': 'begin'}, 'bad-splits'), ({'cycle': 94, 'offset': 81, 'master': 161, 'splits': [[2, 32], [4, 26], [6, 36]], 'yellow': 3, 'red': 2, 'ref': 'end'}, [2, 'green', 14]), ({'cycle': 56, 'offset': 16, 'master': 493, 'splits': [[2, 27], [4, 29]], 'yellow': 4, 'red': 2, 'ref': 'begin'}, [4, 'green', 21])], [({'cycle': 69, 'offset': 41, 'master': 89, 'splits': [[2, 30], [4, 39]], 'yellow': 4, 'red': 1, 'ref': 'begin'}, [4, 'green', 16]), ({'cycle': 56, 'offset': 17, 'master': 73, 'splits': [[2, 25], [4, 31]], 'yellow': 4, 'red': 1, 'ref': 'end'}, [2, 'yellow', 4]), ({'cycle': 105, 'offset': 65, 'master': 94, 'splits': [[2, 32], [4, 20], [6, 33], [8, 15]], 'yellow': 4, 'red': 1, 'ref': 'end'}, 'bad-splits'), ({'cycle': 43, 'offset': 9, 'master': 403, 'splits': [[2, 15], [4, 28]], 'yellow': 4, 'red': 1, 'ref': 'begin'}, [2, 'green', 3]), ({'cycle': 102, 'offset': 65, 'master': 146, 'splits': [[2, 29], [4, 16], [6, 27], [8, 30]], 'yellow': 3, 'red': 2, 'ref': 'end'}, [2, 'green', 21]), ({'cycle': 90, 'offset': 30, 'master': 45, 'splits': [[2, 40], [4, 25], [6, 25]], 'yellow': 4, 'red': 1, 'ref': 'end'}, [4, 'green', 10]), ({'cycle': 100, 'offset': 5, 'master': 3, 'splits': [[2, 50], [4, 30], [8, 25]], 'yellow': 4, 'red': 2, 'ref': 'begin'}, 'bad-splits'), ({'cycle': 80, 'offset': 70, 'master': 10, 'splits': [[2, 50], [4, 30]], 'yellow': 3, 'red': 2, 'ref': 'begin'}, [2, 'green', 25])], [({'cycle': 99, 'offset': 95, 'master': 689, 'splits': [[2, 39], [4, 32], [6, 28]], 'yellow': 4, 'red': 1, 'ref': 'begin'}, [2, 'green', 34]), ({'cycle': 69, 'offset': 37, 'master': 680, 'splits': [[2, 31], [4, 38]], 'yellow': 3, 'red': 2, 'ref': 'end'}, [4, 'green', 16]), ({'cycle': 78, 'offset': 0, 'master': 597, 'splits': [[2, 27], [4, 16], [6, 35]], 'yellow': 4, 'red': 2, 'ref': 'begin'}, [6, 'green', 21]), ({'cycle': 80, 'offset': 70, 'master': 10, 'splits': [[2, 50], [4, 30]], 'yellow': 3, 'red': 2, 'ref': 'begin'}, [2, 'green', 25]), ({'cycle': 90, 'offset': 30, 'master': 45, 'splits': [[2, 40], [4, 25], [6, 25]], 'yellow': 4, 'red': 1, 'ref': 'end'}, [4, 'green', 10]), ({'cycle': 72, 'offset': 22, 'master': 392, 'splits': [[2, 23], [4, 30], [6, 19]], 'yellow': 3, 'red': 2, 'ref': 'end'}, [4, 'green', 20]), ({'cycle': 72, 'offset': 34, 'master': 687, 'splits': [[2, 32], [4, 40]], 'yellow': 4, 'red': 2, 'ref': 'end'}, [2, 'red', 1]), ({'cycle': 100, 'offset': 5, 'master': 3, 'splits': [[2, 50], [4, 30], [8, 25]], 'yellow': 4, 'red': 2, 'ref': 'begin'}, 'bad-splits')], [({'cycle': 80, 'offset': 70, 'master': 10, 'splits': [[2, 50], [4, 30]], 'yellow': 3, 'red': 2, 'ref': 'begin'}, [2, 'green', 25]), ({'cycle': 70, 'offset': 26, 'master': 359, 'splits': [[2, 38], [4, 32]], 'yellow': 4, 'red': 1, 'ref': 'end'}, [2, 'green', 17]), ({'cycle': 90, 'offset': 30, 'master': 45, 'splits': [[2, 40], [4, 25], [6, 25]], 'yellow': 4, 'red': 1, 'ref': 'end'}, [4, 'green', 10]), ({'cycle': 112, 'offset': 45, 'master': 656, 'splits': [[2, 29], [4, 39], [6, 25], [8, 19]], 'yellow': 4, 'red': 2, 'ref': 'begin'}, [4, 'green', 11]), ({'cycle': 140, 'offset': 33, 'master': 792, 'splits': [[2, 35], [4, 37], [6, 35], [8, 33]], 'yellow': 3, 'red': 1, 'ref': 'end'}, [6, 'green', 13]), ({'cycle': 59, 'offset': 32, 'master': 537, 'splits': [[2, 21], [4, 18], [6, 20]], 'yellow': 4, 'red': 1, 'ref': 'begin'}, [4, 'green', 1]), ({'cycle': 100, 'offset': 5, 'master': 3, 'splits': [[2, 50], [4, 30], [8, 25]], 'yellow': 4, 'red': 2, 'ref': 'begin'}, 'bad-splits'), ({'cycle': 93, 'offset': 2, 'master': 972, 'splits': [[2, 40], [4, 36], [6, 17]], 'yellow': 3, 'red': 2, 'ref': 'end'}, [4, 'red', 1])]]\nfor i, (args, expected) in enumerate(fixtures[N-1]):\n    check('timing oracle' + ' %d' % i, solve(args), expected)\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":"A deterministic, bounded toy model with a stipulated contract; it makes no claim of conformance to any agency manual or standard. 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":"w2-traffic_signal_timing_plans-coord-timer-end-reference","generated_at":"2026-09-29T14:47:58.454029+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"Signal timing arithmetic is exact and integer or rational; a wrong rule silently produces unsafe or inefficient timing plans.","repair":"Restore the offset reference point rule so that the step reads `lc = (lc + sp[0][1] - y - r) % C`.","root_cause":"Converting an end-of-green reference subtracts the coordinated green instead of adding it.","sha256":"e095272e04a3f601f6533720092e96d1fd330c1806e64e2d5c809e439d972ff9","title":"Coordinated local cycle timer: end-of-green offsets are shifted in the wrong direction · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":41.017,"exit_code":1,"observations":[{"actual":[6,"green",26],"check":"timing oracle 0","expected":[6,"green",26],"passed":true},{"actual":[4,"green",5],"check":"timing oracle 1","expected":[4,"green",5],"passed":true},{"actual":[2,"green",25],"check":"timing oracle 2","expected":[2,"green",25],"passed":true},{"actual":[4,"green",27],"check":"timing oracle 3","expected":[4,"green",27],"passed":true},{"actual":[4,"green",5],"check":"timing oracle 4","expected":[4,"green",10],"passed":false},{"actual":"bad-splits","check":"timing oracle 5","expected":"bad-splits","passed":true},{"actual":[2,"green",9],"check":"timing oracle 6","expected":[2,"green",15],"passed":false},{"actual":[6,"green",19],"check":"timing oracle 7","expected":[6,"green",24],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"timing oracle 0\", \"actual\": [6, \"green\", 26], \"expected\": [6, \"green\", 26], \"passed\": true}, {\"check\": \"timing oracle 1\", \"actual\": [4, \"green\", 5], \"expected\": [4, \"green\", 5], \"passed\": true}, {\"check\": \"timing oracle 2\", \"actual\": [2, \"green\", 25], \"expected\": [2, \"green\", 25], \"passed\": true}, {\"check\": \"timing oracle 3\", \"actual\": [4, \"green\", 27], \"expected\": [4, \"green\", 27], \"passed\": true}, {\"check\": \"timing oracle 4\", \"actual\": [4, \"green\", 5], \"expected\": [4, \"green\", 10], \"passed\": false}, {\"check\": \"timing oracle 5\", \"actual\": \"bad-splits\", \"expected\": \"bad-splits\", \"passed\": true}, {\"check\": \"timing oracle 6\", \"actual\": [2, \"green\", 9], \"expected\": [2, \"green\", 15], \"passed\": false}, {\"check\": \"timing oracle 7\", \"actual\": [6, \"green\", 19], \"expected\": [6, \"green\", 24], \"passed\": false}], \"passed\": false}\n"},"broken":{"elapsed_ms":45.768,"exit_code":1,"observations":[{"actual":[6,"green",26],"check":"timing oracle 0","expected":[6,"green",26],"passed":true},{"actual":[4,"green",5],"check":"timing oracle 1","expected":[4,"green",5],"passed":true},{"actual":[2,"green",25],"check":"timing oracle 2","expected":[2,"green",25],"passed":true},{"actual":[4,"green",27],"check":"timing oracle 3","expected":[4,"green",27],"passed":true},{"actual":[6,"green",15],"check":"timing oracle 4","expected":[4,"green",10],"passed":false},{"actual":"bad-splits","check":"timing oracle 5","expected":"bad-splits","passed":true},{"actual":[4,"yellow",4],"check":"timing oracle 6","expected":[2,"green",15],"passed":false},{"actual":[2,"green",1],"check":"timing oracle 7","expected":[6,"green",24],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"timing oracle 0\", \"actual\": [6, \"green\", 26], \"expected\": [6, \"green\", 26], \"passed\": true}, {\"check\": \"timing oracle 1\", \"actual\": [4, \"green\", 5], \"expected\": [4, \"green\", 5], \"passed\": true}, {\"check\": \"timing oracle 2\", \"actual\": [2, \"green\", 25], \"expected\": [2, \"green\", 25], \"passed\": true}, {\"check\": \"timing oracle 3\", \"actual\": [4, \"green\", 27], \"expected\": [4, \"green\", 27], \"passed\": true}, {\"check\": \"timing oracle 4\", \"actual\": [6, \"green\", 15], \"expected\": [4, \"green\", 10], \"passed\": false}, {\"check\": \"timing oracle 5\", \"actual\": \"bad-splits\", \"expected\": \"bad-splits\", \"passed\": true}, {\"check\": \"timing oracle 6\", \"actual\": [4, \"yellow\", 4], \"expected\": [2, \"green\", 15], \"passed\": false}, {\"check\": \"timing oracle 7\", \"actual\": [2, \"green\", 1], \"expected\": [6, \"green\", 24], \"passed\": false}], \"passed\": false}\n"},"fixed":{"elapsed_ms":42.624,"exit_code":0,"observations":[{"actual":[6,"green",26],"check":"timing oracle 0","expected":[6,"green",26],"passed":true},{"actual":[4,"green",5],"check":"timing oracle 1","expected":[4,"green",5],"passed":true},{"actual":[2,"green",25],"check":"timing oracle 2","expected":[2,"green",25],"passed":true},{"actual":[4,"green",27],"check":"timing oracle 3","expected":[4,"green",27],"passed":true},{"actual":[4,"green",10],"check":"timing oracle 4","expected":[4,"green",10],"passed":true},{"actual":"bad-splits","check":"timing oracle 5","expected":"bad-splits","passed":true},{"actual":[2,"green",15],"check":"timing oracle 6","expected":[2,"green",15],"passed":true},{"actual":[6,"green",24],"check":"timing oracle 7","expected":[6,"green",24],"passed":true}],"passed":true,"stderr":"","stdout":"{\"observations\": [{\"check\": \"timing oracle 0\", \"actual\": [6, \"green\", 26], \"expected\": [6, \"green\", 26], \"passed\": true}, {\"check\": \"timing oracle 1\", \"actual\": [4, \"green\", 5], \"expected\": [4, \"green\", 5], \"passed\": true}, {\"check\": \"timing oracle 2\", \"actual\": [2, \"green\", 25], \"expected\": [2, \"green\", 25], \"passed\": true}, {\"check\": \"timing oracle 3\", \"actual\": [4, \"green\", 27], \"expected\": [4, \"green\", 27], \"passed\": true}, {\"check\": \"timing oracle 4\", \"actual\": [4, \"green\", 10], \"expected\": [4, \"green\", 10], \"passed\": true}, {\"check\": \"timing oracle 5\", \"actual\": \"bad-splits\", \"expected\": \"bad-splits\", \"passed\": true}, {\"check\": \"timing oracle 6\", \"actual\": [2, \"green\", 15], \"expected\": [2, \"green\", 15], \"passed\": true}, {\"check\": \"timing oracle 7\", \"actual\": [6, \"green\", 24], \"expected\": [6, \"green\", 24], \"passed\": true}], \"passed\": true}\n"}},"verified":true,"visibility":"public"}