{"abstract":"Railroad preemption entry timing returns a wrong result when the normal minimum green is honoured during preemption entry.","category":"Traffic signal timing plans","checks":8,"contract":"Input {state: green|yellow|red (red = all-red clearance), elapsed, min_green, preempt_min_green, yellow, red, fdw, ped: none|walk|fdw, ped_elapsed, ped_truncate, track_current}. If the track clearance phase is already green the answer is [0, 0]. In all-red the remaining red is timed; in yellow the remaining yellow and full red are timed. In green the hold is the larger of the remaining preempt minimum green (not the normal minimum) and the pedestrian time: walk is abandoned and FDW is timed in full, or skipped when ped_truncate; an active FDW completes its remainder unless truncated. Return [seconds until track clearance green, green hold].","contract_signature":"x","evaluation_group":"w2-traffic_signal_timing_plans-preempt-entry","failed_approach":"Using the preempt minimum without subtracting elapsed green re-times it from zero.","family":"w2-traffic_signal_timing_plans-preempt-entry-preempt-min","id":"FA-68161","implementations":{"attempt":{"sha256":"ab8f7b337bbe573824d8f55877cb0afeb0b927f79c5440d7e232830fb85a83d3","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(x):\n    st, el = x['state'], x['elapsed']\n    y, r, f = x['yellow'], x['red'], x['fdw']\n    if st == 'green' and x['track_current']:\n        return [0, 0]\n    if st == 'red':\n        return [max(0, r - el), 0]\n    if st == 'yellow':\n        return [max(0, y - el) + r, 0]\n    ped = 0\n    if x['ped'] == 'walk':\n        ped = 0 if x['ped_truncate'] else f\n    elif x['ped'] == 'fdw':\n        ped = 0 if x['ped_truncate'] else max(0, f - x['ped_elapsed'])\n    hold = max(ped, max(0, x['preempt_min_green']))\n    return [hold + y + r, hold]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[({'state': 'green', 'elapsed': 2, 'min_green': 16, 'preempt_min_green': 8, 'yellow': 6, 'red': 2, 'fdw': 11, 'ped': 'fdw', 'ped_elapsed': 4, 'ped_truncate': False, 'track_current': False}, [15, 7]), ({'state': 'yellow', 'elapsed': 2, 'min_green': 10, 'preempt_min_green': 4, 'yellow': 4, 'red': 2, 'fdw': 12, 'ped': 'none', 'ped_elapsed': 0, 'ped_truncate': False, 'track_current': True}, [4, 0]), ({'state': 'green', 'elapsed': 3, 'min_green': 8, 'preempt_min_green': 4, 'yellow': 6, 'red': 2, 'fdw': 21, 'ped': 'none', 'ped_elapsed': 19, 'ped_truncate': True, 'track_current': True}, [0, 0]), ({'state': 'green', 'elapsed': 19, 'min_green': 19, 'preempt_min_green': 7, 'yellow': 6, 'red': 2, 'fdw': 21, 'ped': 'none', 'ped_elapsed': 11, 'ped_truncate': True, 'track_current': False}, [8, 0]), ({'state': 'green', 'elapsed': 1, 'min_green': 15, 'preempt_min_green': 5, 'yellow': 4, 'red': 2, 'fdw': 12, 'ped': 'fdw', 'ped_elapsed': 4, 'ped_truncate': False, 'track_current': False}, [14, 8]), ({'state': 'green', 'elapsed': 14, 'min_green': 17, 'preempt_min_green': 4, 'yellow': 3, 'red': 3, 'fdw': 22, 'ped': 'walk', 'ped_elapsed': 10, 'ped_truncate': True, 'track_current': False}, [6, 0]), ({'state': 'yellow', 'elapsed': 2, 'min_green': 12, 'preempt_min_green': 4, 'yellow': 3, 'red': 1, 'fdw': 20, 'ped': 'none', 'ped_elapsed': 15, 'ped_truncate': True, 'track_current': False}, [2, 0]), ({'state': 'red', 'elapsed': 11, 'min_green': 9, 'preempt_min_green': 4, 'yellow': 4, 'red': 3, 'fdw': 11, 'ped': 'none', 'ped_elapsed': 6, 'ped_truncate': False, 'track_current': False}, [0, 0])], [({'state': 'green', 'elapsed': 16, 'min_green': 16, 'preempt_min_green': 7, 'yellow': 3, 'red': 2, 'fdw': 25, 'ped': 'walk', 'ped_elapsed': 12, 'ped_truncate': False, 'track_current': False}, [30, 25]), ({'state': 'green', 'elapsed': 1, 'min_green': 15, 'preempt_min_green': 5, 'yellow': 4, 'red': 2, 'fdw': 12, 'ped': 'fdw', 'ped_elapsed': 4, 'ped_truncate': False, 'track_current': False}, [14, 8]), ({'state': 'yellow', 'elapsed': 6, 'min_green': 10, 'preempt_min_green': 2, 'yellow': 6, 'red': 3, 'fdw': 18, 'ped': 'none', 'ped_elapsed': 11, 'ped_truncate': True, 'track_current': False}, [3, 0]), ({'state': 'yellow', 'elapsed': 2, 'min_green': 10, 'preempt_min_green': 4, 'yellow': 4, 'red': 2, 'fdw': 12, 'ped': 'none', 'ped_elapsed': 0, 'ped_truncate': False, 'track_current': True}, [4, 0]), ({'state': 'green', 'elapsed': 7, 'min_green': 13, 'preempt_min_green': 3, 'yellow': 4, 'red': 1, 'fdw': 17, 'ped': 'walk', 'ped_elapsed': 11, 'ped_truncate': True, 'track_current': False}, [5, 0]), ({'state': 'green', 'elapsed': 14, 'min_green': 19, 'preempt_min_green': 9, 'yellow': 5, 'red': 1, 'fdw': 16, 'ped': 'walk', 'ped_elapsed': 10, 'ped_truncate': False, 'track_current': False}, [22, 16]), ({'state': 'green', 'elapsed': 0, 'min_green': 12, 'preempt_min_green': 3, 'yellow': 5, 'red': 2, 'fdw': 21, 'ped': 'fdw', 'ped_elapsed': 12, 'ped_truncate': False, 'track_current': False}, [16, 9]), ({'state': 'green', 'elapsed': 19, 'min_green': 12, 'preempt_min_green': 3, 'yellow': 4, 'red': 2, 'fdw': 25, 'ped': 'walk', 'ped_elapsed': 11, 'ped_truncate': True, 'track_current': False}, [6, 0])], [({'state': 'green', 'elapsed': 14, 'min_green': 10, 'preempt_min_green': 9, 'yellow': 4, 'red': 2, 'fdw': 16, 'ped': 'fdw', 'ped_elapsed': 16, 'ped_truncate': True, 'track_current': False}, [6, 0]), ({'state': 'green', 'elapsed': 1, 'min_green': 15, 'preempt_min_green': 5, 'yellow': 4, 'red': 2, 'fdw': 12, 'ped': 'fdw', 'ped_elapsed': 4, 'ped_truncate': False, 'track_current': False}, [14, 8]), ({'state': 'red', 'elapsed': 18, 'min_green': 20, 'preempt_min_green': 3, 'yellow': 5, 'red': 3, 'fdw': 17, 'ped': 'none', 'ped_elapsed': 13, 'ped_truncate': True, 'track_current': False}, [0, 0]), ({'state': 'red', 'elapsed': 14, 'min_green': 20, 'preempt_min_green': 5, 'yellow': 6, 'red': 3, 'fdw': 23, 'ped': 'none', 'ped_elapsed': 0, 'ped_truncate': False, 'track_current': False}, [0, 0]), ({'state': 'green', 'elapsed': 6, 'min_green': 19, 'preempt_min_green': 5, 'yellow': 3, 'red': 1, 'fdw': 14, 'ped': 'walk', 'ped_elapsed': 0, 'ped_truncate': True, 'track_current': False}, [4, 0]), ({'state': 'yellow', 'elapsed': 2, 'min_green': 10, 'preempt_min_green': 4, 'yellow': 4, 'red': 2, 'fdw': 12, 'ped': 'none', 'ped_elapsed': 0, 'ped_truncate': False, 'track_current': True}, [4, 0]), ({'state': 'green', 'elapsed': 9, 'min_green': 18, 'preempt_min_green': 9, 'yellow': 4, 'red': 2, 'fdw': 13, 'ped': 'none', 'ped_elapsed': 12, 'ped_truncate': False, 'track_current': False}, [6, 0]), ({'state': 'yellow', 'elapsed': 16, 'min_green': 16, 'preempt_min_green': 10, 'yellow': 4, 'red': 3, 'fdw': 10, 'ped': 'none', 'ped_elapsed': 19, 'ped_truncate': False, 'track_current': False}, [3, 0])], [({'state': 'green', 'elapsed': 7, 'min_green': 16, 'preempt_min_green': 4, 'yellow': 6, 'red': 3, 'fdw': 10, 'ped': 'walk', 'ped_elapsed': 17, 'ped_truncate': False, 'track_current': True}, [0, 0]), ({'state': 'green', 'elapsed': 3, 'min_green': 16, 'preempt_min_green': 8, 'yellow': 3, 'red': 3, 'fdw': 11, 'ped': 'fdw', 'ped_elapsed': 17, 'ped_truncate': True, 'track_current': True}, [0, 0]), ({'state': 'red', 'elapsed': 11, 'min_green': 13, 'preempt_min_green': 2, 'yellow': 3, 'red': 1, 'fdw': 11, 'ped': 'none', 'ped_elapsed': 4, 'ped_truncate': True, 'track_current': True}, [0, 0]), ({'state': 'green', 'elapsed': 1, 'min_green': 15, 'preempt_min_green': 5, 'yellow': 4, 'red': 2, 'fdw': 12, 'ped': 'fdw', 'ped_elapsed': 4, 'ped_truncate': False, 'track_current': False}, [14, 8]), ({'state': 'green', 'elapsed': 13, 'min_green': 17, 'preempt_min_green': 7, 'yellow': 6, 'red': 3, 'fdw': 21, 'ped': 'none', 'ped_elapsed': 10, 'ped_truncate': False, 'track_current': False}, [9, 0]), ({'state': 'yellow', 'elapsed': 2, 'min_green': 10, 'preempt_min_green': 4, 'yellow': 4, 'red': 2, 'fdw': 12, 'ped': 'none', 'ped_elapsed': 0, 'ped_truncate': False, 'track_current': True}, [4, 0]), ({'state': 'green', 'elapsed': 12, 'min_green': 20, 'preempt_min_green': 9, 'yellow': 5, 'red': 1, 'fdw': 15, 'ped': 'walk', 'ped_elapsed': 4, 'ped_truncate': True, 'track_current': False}, [6, 0]), ({'state': 'green', 'elapsed': 20, 'min_green': 11, 'preempt_min_green': 9, 'yellow': 5, 'red': 2, 'fdw': 12, 'ped': 'none', 'ped_elapsed': 14, 'ped_truncate': False, 'track_current': True}, [0, 0])], [({'state': 'green', 'elapsed': 1, 'min_green': 15, 'preempt_min_green': 5, 'yellow': 4, 'red': 2, 'fdw': 12, 'ped': 'fdw', 'ped_elapsed': 4, 'ped_truncate': False, 'track_current': False}, [14, 8]), ({'state': 'yellow', 'elapsed': 2, 'min_green': 10, 'preempt_min_green': 4, 'yellow': 4, 'red': 2, 'fdw': 12, 'ped': 'none', 'ped_elapsed': 0, 'ped_truncate': False, 'track_current': True}, [4, 0]), ({'state': 'yellow', 'elapsed': 12, 'min_green': 12, 'preempt_min_green': 3, 'yellow': 4, 'red': 1, 'fdw': 25, 'ped': 'none', 'ped_elapsed': 19, 'ped_truncate': True, 'track_current': False}, [1, 0]), ({'state': 'green', 'elapsed': 19, 'min_green': 9, 'preempt_min_green': 8, 'yellow': 3, 'red': 1, 'fdw': 24, 'ped': 'fdw', 'ped_elapsed': 4, 'ped_truncate': True, 'track_current': False}, [4, 0]), ({'state': 'green', 'elapsed': 10, 'min_green': 11, 'preempt_min_green': 9, 'yellow': 4, 'red': 1, 'fdw': 14, 'ped': 'walk', 'ped_elapsed': 10, 'ped_truncate': False, 'track_current': False}, [19, 14]), ({'state': 'yellow', 'elapsed': 13, 'min_green': 15, 'preempt_min_green': 2, 'yellow': 3, 'red': 1, 'fdw': 19, 'ped': 'none', 'ped_elapsed': 19, 'ped_truncate': True, 'track_current': True}, [1, 0]), ({'state': 'green', 'elapsed': 6, 'min_green': 14, 'preempt_min_green': 9, 'yellow': 5, 'red': 3, 'fdw': 9, 'ped': 'fdw', 'ped_elapsed': 7, 'ped_truncate': False, 'track_current': False}, [11, 3]), ({'state': 'green', 'elapsed': 0, 'min_green': 12, 'preempt_min_green': 4, 'yellow': 4, 'red': 2, 'fdw': 8, 'ped': 'fdw', 'ped_elapsed': 20, 'ped_truncate': True, 'track_current': False}, [10, 4])]]\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":"f6ccb1a4139c26fab52d9a3203255cbd5ff98d63a32b0ebce6d08245cd7a52dc","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(x):\n    st, el = x['state'], x['elapsed']\n    y, r, f = x['yellow'], x['red'], x['fdw']\n    if st == 'green' and x['track_current']:\n        return [0, 0]\n    if st == 'red':\n        return [max(0, r - el), 0]\n    if st == 'yellow':\n        return [max(0, y - el) + r, 0]\n    ped = 0\n    if x['ped'] == 'walk':\n        ped = 0 if x['ped_truncate'] else f\n    elif x['ped'] == 'fdw':\n        ped = 0 if x['ped_truncate'] else max(0, f - x['ped_elapsed'])\n    hold = max(ped, max(0, x['min_green'] - el))\n    return [hold + y + r, hold]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[({'state': 'green', 'elapsed': 2, 'min_green': 16, 'preempt_min_green': 8, 'yellow': 6, 'red': 2, 'fdw': 11, 'ped': 'fdw', 'ped_elapsed': 4, 'ped_truncate': False, 'track_current': False}, [15, 7]), ({'state': 'yellow', 'elapsed': 2, 'min_green': 10, 'preempt_min_green': 4, 'yellow': 4, 'red': 2, 'fdw': 12, 'ped': 'none', 'ped_elapsed': 0, 'ped_truncate': False, 'track_current': True}, [4, 0]), ({'state': 'green', 'elapsed': 3, 'min_green': 8, 'preempt_min_green': 4, 'yellow': 6, 'red': 2, 'fdw': 21, 'ped': 'none', 'ped_elapsed': 19, 'ped_truncate': True, 'track_current': True}, [0, 0]), ({'state': 'green', 'elapsed': 19, 'min_green': 19, 'preempt_min_green': 7, 'yellow': 6, 'red': 2, 'fdw': 21, 'ped': 'none', 'ped_elapsed': 11, 'ped_truncate': True, 'track_current': False}, [8, 0]), ({'state': 'green', 'elapsed': 1, 'min_green': 15, 'preempt_min_green': 5, 'yellow': 4, 'red': 2, 'fdw': 12, 'ped': 'fdw', 'ped_elapsed': 4, 'ped_truncate': False, 'track_current': False}, [14, 8]), ({'state': 'green', 'elapsed': 14, 'min_green': 17, 'preempt_min_green': 4, 'yellow': 3, 'red': 3, 'fdw': 22, 'ped': 'walk', 'ped_elapsed': 10, 'ped_truncate': True, 'track_current': False}, [6, 0]), ({'state': 'yellow', 'elapsed': 2, 'min_green': 12, 'preempt_min_green': 4, 'yellow': 3, 'red': 1, 'fdw': 20, 'ped': 'none', 'ped_elapsed': 15, 'ped_truncate': True, 'track_current': False}, [2, 0]), ({'state': 'red', 'elapsed': 11, 'min_green': 9, 'preempt_min_green': 4, 'yellow': 4, 'red': 3, 'fdw': 11, 'ped': 'none', 'ped_elapsed': 6, 'ped_truncate': False, 'track_current': False}, [0, 0])], [({'state': 'green', 'elapsed': 16, 'min_green': 16, 'preempt_min_green': 7, 'yellow': 3, 'red': 2, 'fdw': 25, 'ped': 'walk', 'ped_elapsed': 12, 'ped_truncate': False, 'track_current': False}, [30, 25]), ({'state': 'green', 'elapsed': 1, 'min_green': 15, 'preempt_min_green': 5, 'yellow': 4, 'red': 2, 'fdw': 12, 'ped': 'fdw', 'ped_elapsed': 4, 'ped_truncate': False, 'track_current': False}, [14, 8]), ({'state': 'yellow', 'elapsed': 6, 'min_green': 10, 'preempt_min_green': 2, 'yellow': 6, 'red': 3, 'fdw': 18, 'ped': 'none', 'ped_elapsed': 11, 'ped_truncate': True, 'track_current': False}, [3, 0]), ({'state': 'yellow', 'elapsed': 2, 'min_green': 10, 'preempt_min_green': 4, 'yellow': 4, 'red': 2, 'fdw': 12, 'ped': 'none', 'ped_elapsed': 0, 'ped_truncate': False, 'track_current': True}, [4, 0]), ({'state': 'green', 'elapsed': 7, 'min_green': 13, 'preempt_min_green': 3, 'yellow': 4, 'red': 1, 'fdw': 17, 'ped': 'walk', 'ped_elapsed': 11, 'ped_truncate': True, 'track_current': False}, [5, 0]), ({'state': 'green', 'elapsed': 14, 'min_green': 19, 'preempt_min_green': 9, 'yellow': 5, 'red': 1, 'fdw': 16, 'ped': 'walk', 'ped_elapsed': 10, 'ped_truncate': False, 'track_current': False}, [22, 16]), ({'state': 'green', 'elapsed': 0, 'min_green': 12, 'preempt_min_green': 3, 'yellow': 5, 'red': 2, 'fdw': 21, 'ped': 'fdw', 'ped_elapsed': 12, 'ped_truncate': False, 'track_current': False}, [16, 9]), ({'state': 'green', 'elapsed': 19, 'min_green': 12, 'preempt_min_green': 3, 'yellow': 4, 'red': 2, 'fdw': 25, 'ped': 'walk', 'ped_elapsed': 11, 'ped_truncate': True, 'track_current': False}, [6, 0])], [({'state': 'green', 'elapsed': 14, 'min_green': 10, 'preempt_min_green': 9, 'yellow': 4, 'red': 2, 'fdw': 16, 'ped': 'fdw', 'ped_elapsed': 16, 'ped_truncate': True, 'track_current': False}, [6, 0]), ({'state': 'green', 'elapsed': 1, 'min_green': 15, 'preempt_min_green': 5, 'yellow': 4, 'red': 2, 'fdw': 12, 'ped': 'fdw', 'ped_elapsed': 4, 'ped_truncate': False, 'track_current': False}, [14, 8]), ({'state': 'red', 'elapsed': 18, 'min_green': 20, 'preempt_min_green': 3, 'yellow': 5, 'red': 3, 'fdw': 17, 'ped': 'none', 'ped_elapsed': 13, 'ped_truncate': True, 'track_current': False}, [0, 0]), ({'state': 'red', 'elapsed': 14, 'min_green': 20, 'preempt_min_green': 5, 'yellow': 6, 'red': 3, 'fdw': 23, 'ped': 'none', 'ped_elapsed': 0, 'ped_truncate': False, 'track_current': False}, [0, 0]), ({'state': 'green', 'elapsed': 6, 'min_green': 19, 'preempt_min_green': 5, 'yellow': 3, 'red': 1, 'fdw': 14, 'ped': 'walk', 'ped_elapsed': 0, 'ped_truncate': True, 'track_current': False}, [4, 0]), ({'state': 'yellow', 'elapsed': 2, 'min_green': 10, 'preempt_min_green': 4, 'yellow': 4, 'red': 2, 'fdw': 12, 'ped': 'none', 'ped_elapsed': 0, 'ped_truncate': False, 'track_current': True}, [4, 0]), ({'state': 'green', 'elapsed': 9, 'min_green': 18, 'preempt_min_green': 9, 'yellow': 4, 'red': 2, 'fdw': 13, 'ped': 'none', 'ped_elapsed': 12, 'ped_truncate': False, 'track_current': False}, [6, 0]), ({'state': 'yellow', 'elapsed': 16, 'min_green': 16, 'preempt_min_green': 10, 'yellow': 4, 'red': 3, 'fdw': 10, 'ped': 'none', 'ped_elapsed': 19, 'ped_truncate': False, 'track_current': False}, [3, 0])], [({'state': 'green', 'elapsed': 7, 'min_green': 16, 'preempt_min_green': 4, 'yellow': 6, 'red': 3, 'fdw': 10, 'ped': 'walk', 'ped_elapsed': 17, 'ped_truncate': False, 'track_current': True}, [0, 0]), ({'state': 'green', 'elapsed': 3, 'min_green': 16, 'preempt_min_green': 8, 'yellow': 3, 'red': 3, 'fdw': 11, 'ped': 'fdw', 'ped_elapsed': 17, 'ped_truncate': True, 'track_current': True}, [0, 0]), ({'state': 'red', 'elapsed': 11, 'min_green': 13, 'preempt_min_green': 2, 'yellow': 3, 'red': 1, 'fdw': 11, 'ped': 'none', 'ped_elapsed': 4, 'ped_truncate': True, 'track_current': True}, [0, 0]), ({'state': 'green', 'elapsed': 1, 'min_green': 15, 'preempt_min_green': 5, 'yellow': 4, 'red': 2, 'fdw': 12, 'ped': 'fdw', 'ped_elapsed': 4, 'ped_truncate': False, 'track_current': False}, [14, 8]), ({'state': 'green', 'elapsed': 13, 'min_green': 17, 'preempt_min_green': 7, 'yellow': 6, 'red': 3, 'fdw': 21, 'ped': 'none', 'ped_elapsed': 10, 'ped_truncate': False, 'track_current': False}, [9, 0]), ({'state': 'yellow', 'elapsed': 2, 'min_green': 10, 'preempt_min_green': 4, 'yellow': 4, 'red': 2, 'fdw': 12, 'ped': 'none', 'ped_elapsed': 0, 'ped_truncate': False, 'track_current': True}, [4, 0]), ({'state': 'green', 'elapsed': 12, 'min_green': 20, 'preempt_min_green': 9, 'yellow': 5, 'red': 1, 'fdw': 15, 'ped': 'walk', 'ped_elapsed': 4, 'ped_truncate': True, 'track_current': False}, [6, 0]), ({'state': 'green', 'elapsed': 20, 'min_green': 11, 'preempt_min_green': 9, 'yellow': 5, 'red': 2, 'fdw': 12, 'ped': 'none', 'ped_elapsed': 14, 'ped_truncate': False, 'track_current': True}, [0, 0])], [({'state': 'green', 'elapsed': 1, 'min_green': 15, 'preempt_min_green': 5, 'yellow': 4, 'red': 2, 'fdw': 12, 'ped': 'fdw', 'ped_elapsed': 4, 'ped_truncate': False, 'track_current': False}, [14, 8]), ({'state': 'yellow', 'elapsed': 2, 'min_green': 10, 'preempt_min_green': 4, 'yellow': 4, 'red': 2, 'fdw': 12, 'ped': 'none', 'ped_elapsed': 0, 'ped_truncate': False, 'track_current': True}, [4, 0]), ({'state': 'yellow', 'elapsed': 12, 'min_green': 12, 'preempt_min_green': 3, 'yellow': 4, 'red': 1, 'fdw': 25, 'ped': 'none', 'ped_elapsed': 19, 'ped_truncate': True, 'track_current': False}, [1, 0]), ({'state': 'green', 'elapsed': 19, 'min_green': 9, 'preempt_min_green': 8, 'yellow': 3, 'red': 1, 'fdw': 24, 'ped': 'fdw', 'ped_elapsed': 4, 'ped_truncate': True, 'track_current': False}, [4, 0]), ({'state': 'green', 'elapsed': 10, 'min_green': 11, 'preempt_min_green': 9, 'yellow': 4, 'red': 1, 'fdw': 14, 'ped': 'walk', 'ped_elapsed': 10, 'ped_truncate': False, 'track_current': False}, [19, 14]), ({'state': 'yellow', 'elapsed': 13, 'min_green': 15, 'preempt_min_green': 2, 'yellow': 3, 'red': 1, 'fdw': 19, 'ped': 'none', 'ped_elapsed': 19, 'ped_truncate': True, 'track_current': True}, [1, 0]), ({'state': 'green', 'elapsed': 6, 'min_green': 14, 'preempt_min_green': 9, 'yellow': 5, 'red': 3, 'fdw': 9, 'ped': 'fdw', 'ped_elapsed': 7, 'ped_truncate': False, 'track_current': False}, [11, 3]), ({'state': 'green', 'elapsed': 0, 'min_green': 12, 'preempt_min_green': 4, 'yellow': 4, 'red': 2, 'fdw': 8, 'ped': 'fdw', 'ped_elapsed': 20, 'ped_truncate': True, 'track_current': False}, [10, 4])]]\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-preempt-entry-preempt-min","generated_at":"2026-09-29T14:47:59.629638+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.","root_cause":"The controller times the full normal minimum green before leaving for the track clearance phase, delaying it.","sha256":"1c98ceee41cd0661658f85f3be524b9572a9602ea063e32fc59080e6fdb00004","title":"Railroad preemption entry timing: the normal minimum green is honoured during preemption entry · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verified":true,"visibility":"public","verification":{"attempt":{"elapsed_ms":44.248,"exit_code":1,"observations":[{"actual":[16,8],"check":"timing oracle 0","expected":[15,7],"passed":false},{"actual":[4,0],"check":"timing oracle 1","expected":[4,0],"passed":true},{"actual":[0,0],"check":"timing oracle 2","expected":[0,0],"passed":true},{"actual":[15,7],"check":"timing oracle 3","expected":[8,0],"passed":false},{"actual":[14,8],"check":"timing oracle 4","expected":[14,8],"passed":true},{"actual":[10,4],"check":"timing oracle 5","expected":[6,0],"passed":false},{"actual":[2,0],"check":"timing oracle 6","expected":[2,0],"passed":true},{"actual":[0,0],"check":"timing oracle 7","expected":[0,0],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"timing oracle 0\", \"actual\": [16, 8], \"expected\": [15, 7], \"passed\": false}, {\"check\": \"timing oracle 1\", \"actual\": [4, 0], \"expected\": [4, 0], \"passed\": true}, {\"check\": \"timing oracle 2\", \"actual\": [0, 0], \"expected\": [0, 0], \"passed\": true}, {\"check\": \"timing oracle 3\", \"actual\": [15, 7], \"expected\": [8, 0], \"passed\": false}, {\"check\": \"timing oracle 4\", \"actual\": [14, 8], \"expected\": [14, 8], \"passed\": true}, {\"check\": \"timing oracle 5\", \"actual\": [10, 4], \"expected\": [6, 0], \"passed\": false}, {\"check\": \"timing oracle 6\", \"actual\": [2, 0], \"expected\": [2, 0], \"passed\": true}, {\"check\": \"timing oracle 7\", \"actual\": [0, 0], \"expected\": [0, 0], \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":41.956,"exit_code":1,"observations":[{"actual":[22,14],"check":"timing oracle 0","expected":[15,7],"passed":false},{"actual":[4,0],"check":"timing oracle 1","expected":[4,0],"passed":true},{"actual":[0,0],"check":"timing oracle 2","expected":[0,0],"passed":true},{"actual":[8,0],"check":"timing oracle 3","expected":[8,0],"passed":true},{"actual":[20,14],"check":"timing oracle 4","expected":[14,8],"passed":false},{"actual":[9,3],"check":"timing oracle 5","expected":[6,0],"passed":false},{"actual":[2,0],"check":"timing oracle 6","expected":[2,0],"passed":true},{"actual":[0,0],"check":"timing oracle 7","expected":[0,0],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"timing oracle 0\", \"actual\": [22, 14], \"expected\": [15, 7], \"passed\": false}, {\"check\": \"timing oracle 1\", \"actual\": [4, 0], \"expected\": [4, 0], \"passed\": true}, {\"check\": \"timing oracle 2\", \"actual\": [0, 0], \"expected\": [0, 0], \"passed\": true}, {\"check\": \"timing oracle 3\", \"actual\": [8, 0], \"expected\": [8, 0], \"passed\": true}, {\"check\": \"timing oracle 4\", \"actual\": [20, 14], \"expected\": [14, 8], \"passed\": false}, {\"check\": \"timing oracle 5\", \"actual\": [9, 3], \"expected\": [6, 0], \"passed\": false}, {\"check\": \"timing oracle 6\", \"actual\": [2, 0], \"expected\": [2, 0], \"passed\": true}, {\"check\": \"timing oracle 7\", \"actual\": [0, 0], \"expected\": [0, 0], \"passed\": true}], \"passed\": false}\n"}},"member_only":{"stages":["fixed"],"fields":["implementations.fixed","verification.fixed","harness","repair"],"note":"The verified repair, its recorded checks, the repair description, and the scoring harness are available to members."}}