{"abstract":"Railroad preemption entry timing returns a wrong result when fDW is timed even when pedestrian truncation is enabled.","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].","evaluation_group":"w2-traffic_signal_timing_plans-preempt-entry","failed_approach":"Always skipping FDW drops pedestrian clearance where the contract requires it.","family":"w2-traffic_signal_timing_plans-preempt-entry-walk-abandon","id":"FA-68171","implementations":{"attempt":{"sha256":"f488671b135332b525aa084523fa77a2a815e404df88043a6515090f1d006bf9","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\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'] - 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': 'red', 'elapsed': 20, 'min_green': 20, 'preempt_min_green': 4, 'yellow': 5, 'red': 3, 'fdw': 25, 'ped': 'none', 'ped_elapsed': 2, 'ped_truncate': True, 'track_current': False}, [0, 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': 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': 7, 'min_green': 15, 'preempt_min_green': 9, 'yellow': 3, 'red': 1, 'fdw': 11, 'ped': 'walk', 'ped_elapsed': 10, 'ped_truncate': True, 'track_current': False}, [6, 2]), ({'state': 'green', 'elapsed': 17, 'min_green': 19, 'preempt_min_green': 7, 'yellow': 4, 'red': 1, 'fdw': 11, 'ped': 'walk', 'ped_elapsed': 11, 'ped_truncate': False, 'track_current': False}, [16, 11]), ({'state': 'green', 'elapsed': 8, 'min_green': 16, 'preempt_min_green': 10, 'yellow': 4, 'red': 3, 'fdw': 13, 'ped': 'walk', 'ped_elapsed': 13, 'ped_truncate': True, 'track_current': False}, [9, 2]), ({'state': 'green', 'elapsed': 8, 'min_green': 13, 'preempt_min_green': 2, 'yellow': 5, 'red': 1, 'fdw': 14, 'ped': 'walk', 'ped_elapsed': 6, 'ped_truncate': False, 'track_current': False}, [20, 14]), ({'state': 'green', 'elapsed': 2, 'min_green': 13, 'preempt_min_green': 10, 'yellow': 4, 'red': 2, 'fdw': 24, 'ped': 'walk', 'ped_elapsed': 18, 'ped_truncate': True, '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': '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': 13, 'preempt_min_green': 3, 'yellow': 3, 'red': 2, 'fdw': 25, 'ped': 'walk', 'ped_elapsed': 16, 'ped_truncate': True, 'track_current': False}, [5, 0]), ({'state': 'green', 'elapsed': 6, 'min_green': 13, 'preempt_min_green': 8, 'yellow': 3, 'red': 3, 'fdw': 18, 'ped': 'walk', 'ped_elapsed': 4, 'ped_truncate': False, 'track_current': False}, [24, 18]), ({'state': 'red', 'elapsed': 5, 'min_green': 13, 'preempt_min_green': 10, 'yellow': 4, 'red': 1, 'fdw': 17, 'ped': 'none', 'ped_elapsed': 15, 'ped_truncate': False, 'track_current': True}, [0, 0]), ({'state': 'green', 'elapsed': 2, 'min_green': 19, 'preempt_min_green': 7, 'yellow': 6, 'red': 3, 'fdw': 18, 'ped': 'walk', 'ped_elapsed': 20, 'ped_truncate': True, 'track_current': False}, [14, 5]), ({'state': 'green', 'elapsed': 14, 'min_green': 18, 'preempt_min_green': 7, 'yellow': 5, 'red': 2, 'fdw': 12, 'ped': 'walk', 'ped_elapsed': 5, 'ped_truncate': False, 'track_current': False}, [19, 12]), ({'state': 'green', 'elapsed': 3, 'min_green': 16, 'preempt_min_green': 5, 'yellow': 3, 'red': 1, 'fdw': 21, 'ped': 'walk', 'ped_elapsed': 15, 'ped_truncate': True, 'track_current': False}, [6, 2])], [({'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': 19, 'preempt_min_green': 4, 'yellow': 4, 'red': 2, 'fdw': 21, 'ped': 'walk', 'ped_elapsed': 13, 'ped_truncate': False, 'track_current': False}, [27, 21]), ({'state': 'red', 'elapsed': 19, 'min_green': 10, 'preempt_min_green': 6, 'yellow': 4, 'red': 1, 'fdw': 25, 'ped': 'none', 'ped_elapsed': 4, 'ped_truncate': False, 'track_current': True}, [0, 0]), ({'state': 'green', 'elapsed': 14, 'min_green': 8, 'preempt_min_green': 2, 'yellow': 6, 'red': 3, 'fdw': 12, 'ped': 'walk', 'ped_elapsed': 4, 'ped_truncate': True, 'track_current': False}, [9, 0]), ({'state': 'green', 'elapsed': 19, 'min_green': 15, 'preempt_min_green': 8, 'yellow': 6, 'red': 1, 'fdw': 16, 'ped': 'walk', 'ped_elapsed': 8, 'ped_truncate': False, 'track_current': False}, [23, 16]), ({'state': 'green', 'elapsed': 11, 'min_green': 16, 'preempt_min_green': 6, 'yellow': 5, 'red': 3, 'fdw': 14, 'ped': 'walk', 'ped_elapsed': 3, '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': 9, 'min_green': 8, 'preempt_min_green': 10, 'yellow': 4, 'red': 1, 'fdw': 18, 'ped': 'walk', 'ped_elapsed': 16, 'ped_truncate': True, 'track_current': False}, [6, 1])], [({'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': 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': 19, 'min_green': 10, 'preempt_min_green': 3, 'yellow': 6, 'red': 2, 'fdw': 8, 'ped': 'walk', 'ped_elapsed': 17, 'ped_truncate': True, 'track_current': False}, [8, 0]), ({'state': 'green', 'elapsed': 6, 'min_green': 13, 'preempt_min_green': 9, 'yellow': 4, 'red': 2, 'fdw': 15, 'ped': 'none', 'ped_elapsed': 14, 'ped_truncate': False, 'track_current': False}, [9, 3]), ({'state': 'green', 'elapsed': 13, 'min_green': 18, 'preempt_min_green': 2, 'yellow': 4, 'red': 3, 'fdw': 23, 'ped': 'walk', 'ped_elapsed': 15, 'ped_truncate': True, 'track_current': False}, [7, 0]), ({'state': 'green', 'elapsed': 6, 'min_green': 14, 'preempt_min_green': 9, 'yellow': 5, 'red': 3, 'fdw': 14, 'ped': 'walk', 'ped_elapsed': 6, 'ped_truncate': True, 'track_current': False}, [11, 3]), ({'state': 'green', 'elapsed': 12, 'min_green': 16, 'preempt_min_green': 9, 'yellow': 4, 'red': 3, 'fdw': 19, 'ped': 'walk', 'ped_elapsed': 4, 'ped_truncate': False, 'track_current': False}, [26, 19]), ({'state': 'green', 'elapsed': 6, 'min_green': 16, 'preempt_min_green': 10, 'yellow': 6, 'red': 1, 'fdw': 18, 'ped': 'walk', 'ped_elapsed': 11, 'ped_truncate': False, 'track_current': False}, [25, 18])], [({'state': 'green', 'elapsed': 4, 'min_green': 20, 'preempt_min_green': 8, 'yellow': 5, 'red': 1, 'fdw': 9, 'ped': 'walk', 'ped_elapsed': 9, 'ped_truncate': False, 'track_current': False}, [15, 9]), ({'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': 4, 'min_green': 19, 'preempt_min_green': 3, 'yellow': 6, 'red': 2, 'fdw': 24, 'ped': 'walk', 'ped_elapsed': 1, 'ped_truncate': True, 'track_current': False}, [8, 0]), ({'state': 'yellow', 'elapsed': 12, 'min_green': 9, 'preempt_min_green': 7, 'yellow': 6, 'red': 3, 'fdw': 8, 'ped': 'none', 'ped_elapsed': 8, 'ped_truncate': True, 'track_current': False}, [3, 0]), ({'state': 'green', 'elapsed': 12, 'min_green': 10, 'preempt_min_green': 9, 'yellow': 4, 'red': 3, 'fdw': 10, 'ped': 'walk', 'ped_elapsed': 9, 'ped_truncate': True, 'track_current': False}, [7, 0]), ({'state': 'green', 'elapsed': 0, 'min_green': 18, 'preempt_min_green': 2, 'yellow': 5, 'red': 1, 'fdw': 10, 'ped': 'walk', 'ped_elapsed': 6, 'ped_truncate': False, 'track_current': False}, [16, 10]), ({'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': 19, 'min_green': 15, 'preempt_min_green': 9, 'yellow': 3, 'red': 2, 'fdw': 8, 'ped': 'walk', 'ped_elapsed': 3, 'ped_truncate': True, 'track_current': False}, [5, 0])]]\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":"85d3f9825fda930992240d148c62d6761d8c3af380aa630665061c4136fe32e6","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 = 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'] - 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': 'red', 'elapsed': 20, 'min_green': 20, 'preempt_min_green': 4, 'yellow': 5, 'red': 3, 'fdw': 25, 'ped': 'none', 'ped_elapsed': 2, 'ped_truncate': True, 'track_current': False}, [0, 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': 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': 7, 'min_green': 15, 'preempt_min_green': 9, 'yellow': 3, 'red': 1, 'fdw': 11, 'ped': 'walk', 'ped_elapsed': 10, 'ped_truncate': True, 'track_current': False}, [6, 2]), ({'state': 'green', 'elapsed': 17, 'min_green': 19, 'preempt_min_green': 7, 'yellow': 4, 'red': 1, 'fdw': 11, 'ped': 'walk', 'ped_elapsed': 11, 'ped_truncate': False, 'track_current': False}, [16, 11]), ({'state': 'green', 'elapsed': 8, 'min_green': 16, 'preempt_min_green': 10, 'yellow': 4, 'red': 3, 'fdw': 13, 'ped': 'walk', 'ped_elapsed': 13, 'ped_truncate': True, 'track_current': False}, [9, 2]), ({'state': 'green', 'elapsed': 8, 'min_green': 13, 'preempt_min_green': 2, 'yellow': 5, 'red': 1, 'fdw': 14, 'ped': 'walk', 'ped_elapsed': 6, 'ped_truncate': False, 'track_current': False}, [20, 14]), ({'state': 'green', 'elapsed': 2, 'min_green': 13, 'preempt_min_green': 10, 'yellow': 4, 'red': 2, 'fdw': 24, 'ped': 'walk', 'ped_elapsed': 18, 'ped_truncate': True, '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': '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': 13, 'preempt_min_green': 3, 'yellow': 3, 'red': 2, 'fdw': 25, 'ped': 'walk', 'ped_elapsed': 16, 'ped_truncate': True, 'track_current': False}, [5, 0]), ({'state': 'green', 'elapsed': 6, 'min_green': 13, 'preempt_min_green': 8, 'yellow': 3, 'red': 3, 'fdw': 18, 'ped': 'walk', 'ped_elapsed': 4, 'ped_truncate': False, 'track_current': False}, [24, 18]), ({'state': 'red', 'elapsed': 5, 'min_green': 13, 'preempt_min_green': 10, 'yellow': 4, 'red': 1, 'fdw': 17, 'ped': 'none', 'ped_elapsed': 15, 'ped_truncate': False, 'track_current': True}, [0, 0]), ({'state': 'green', 'elapsed': 2, 'min_green': 19, 'preempt_min_green': 7, 'yellow': 6, 'red': 3, 'fdw': 18, 'ped': 'walk', 'ped_elapsed': 20, 'ped_truncate': True, 'track_current': False}, [14, 5]), ({'state': 'green', 'elapsed': 14, 'min_green': 18, 'preempt_min_green': 7, 'yellow': 5, 'red': 2, 'fdw': 12, 'ped': 'walk', 'ped_elapsed': 5, 'ped_truncate': False, 'track_current': False}, [19, 12]), ({'state': 'green', 'elapsed': 3, 'min_green': 16, 'preempt_min_green': 5, 'yellow': 3, 'red': 1, 'fdw': 21, 'ped': 'walk', 'ped_elapsed': 15, 'ped_truncate': True, 'track_current': False}, [6, 2])], [({'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': 19, 'preempt_min_green': 4, 'yellow': 4, 'red': 2, 'fdw': 21, 'ped': 'walk', 'ped_elapsed': 13, 'ped_truncate': False, 'track_current': False}, [27, 21]), ({'state': 'red', 'elapsed': 19, 'min_green': 10, 'preempt_min_green': 6, 'yellow': 4, 'red': 1, 'fdw': 25, 'ped': 'none', 'ped_elapsed': 4, 'ped_truncate': False, 'track_current': True}, [0, 0]), ({'state': 'green', 'elapsed': 14, 'min_green': 8, 'preempt_min_green': 2, 'yellow': 6, 'red': 3, 'fdw': 12, 'ped': 'walk', 'ped_elapsed': 4, 'ped_truncate': True, 'track_current': False}, [9, 0]), ({'state': 'green', 'elapsed': 19, 'min_green': 15, 'preempt_min_green': 8, 'yellow': 6, 'red': 1, 'fdw': 16, 'ped': 'walk', 'ped_elapsed': 8, 'ped_truncate': False, 'track_current': False}, [23, 16]), ({'state': 'green', 'elapsed': 11, 'min_green': 16, 'preempt_min_green': 6, 'yellow': 5, 'red': 3, 'fdw': 14, 'ped': 'walk', 'ped_elapsed': 3, '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': 9, 'min_green': 8, 'preempt_min_green': 10, 'yellow': 4, 'red': 1, 'fdw': 18, 'ped': 'walk', 'ped_elapsed': 16, 'ped_truncate': True, 'track_current': False}, [6, 1])], [({'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': 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': 19, 'min_green': 10, 'preempt_min_green': 3, 'yellow': 6, 'red': 2, 'fdw': 8, 'ped': 'walk', 'ped_elapsed': 17, 'ped_truncate': True, 'track_current': False}, [8, 0]), ({'state': 'green', 'elapsed': 6, 'min_green': 13, 'preempt_min_green': 9, 'yellow': 4, 'red': 2, 'fdw': 15, 'ped': 'none', 'ped_elapsed': 14, 'ped_truncate': False, 'track_current': False}, [9, 3]), ({'state': 'green', 'elapsed': 13, 'min_green': 18, 'preempt_min_green': 2, 'yellow': 4, 'red': 3, 'fdw': 23, 'ped': 'walk', 'ped_elapsed': 15, 'ped_truncate': True, 'track_current': False}, [7, 0]), ({'state': 'green', 'elapsed': 6, 'min_green': 14, 'preempt_min_green': 9, 'yellow': 5, 'red': 3, 'fdw': 14, 'ped': 'walk', 'ped_elapsed': 6, 'ped_truncate': True, 'track_current': False}, [11, 3]), ({'state': 'green', 'elapsed': 12, 'min_green': 16, 'preempt_min_green': 9, 'yellow': 4, 'red': 3, 'fdw': 19, 'ped': 'walk', 'ped_elapsed': 4, 'ped_truncate': False, 'track_current': False}, [26, 19]), ({'state': 'green', 'elapsed': 6, 'min_green': 16, 'preempt_min_green': 10, 'yellow': 6, 'red': 1, 'fdw': 18, 'ped': 'walk', 'ped_elapsed': 11, 'ped_truncate': False, 'track_current': False}, [25, 18])], [({'state': 'green', 'elapsed': 4, 'min_green': 20, 'preempt_min_green': 8, 'yellow': 5, 'red': 1, 'fdw': 9, 'ped': 'walk', 'ped_elapsed': 9, 'ped_truncate': False, 'track_current': False}, [15, 9]), ({'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': 4, 'min_green': 19, 'preempt_min_green': 3, 'yellow': 6, 'red': 2, 'fdw': 24, 'ped': 'walk', 'ped_elapsed': 1, 'ped_truncate': True, 'track_current': False}, [8, 0]), ({'state': 'yellow', 'elapsed': 12, 'min_green': 9, 'preempt_min_green': 7, 'yellow': 6, 'red': 3, 'fdw': 8, 'ped': 'none', 'ped_elapsed': 8, 'ped_truncate': True, 'track_current': False}, [3, 0]), ({'state': 'green', 'elapsed': 12, 'min_green': 10, 'preempt_min_green': 9, 'yellow': 4, 'red': 3, 'fdw': 10, 'ped': 'walk', 'ped_elapsed': 9, 'ped_truncate': True, 'track_current': False}, [7, 0]), ({'state': 'green', 'elapsed': 0, 'min_green': 18, 'preempt_min_green': 2, 'yellow': 5, 'red': 1, 'fdw': 10, 'ped': 'walk', 'ped_elapsed': 6, 'ped_truncate': False, 'track_current': False}, [16, 10]), ({'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': 19, 'min_green': 15, 'preempt_min_green': 9, 'yellow': 3, 'red': 2, 'fdw': 8, 'ped': 'walk', 'ped_elapsed': 3, 'ped_truncate': True, 'track_current': False}, [5, 0])]]\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":"00126f3da5c8ce7c5e4fb5f9d68a8289a504639fb400051c36b7de6423b81d1f","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'] - 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': 'red', 'elapsed': 20, 'min_green': 20, 'preempt_min_green': 4, 'yellow': 5, 'red': 3, 'fdw': 25, 'ped': 'none', 'ped_elapsed': 2, 'ped_truncate': True, 'track_current': False}, [0, 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': 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': 7, 'min_green': 15, 'preempt_min_green': 9, 'yellow': 3, 'red': 1, 'fdw': 11, 'ped': 'walk', 'ped_elapsed': 10, 'ped_truncate': True, 'track_current': False}, [6, 2]), ({'state': 'green', 'elapsed': 17, 'min_green': 19, 'preempt_min_green': 7, 'yellow': 4, 'red': 1, 'fdw': 11, 'ped': 'walk', 'ped_elapsed': 11, 'ped_truncate': False, 'track_current': False}, [16, 11]), ({'state': 'green', 'elapsed': 8, 'min_green': 16, 'preempt_min_green': 10, 'yellow': 4, 'red': 3, 'fdw': 13, 'ped': 'walk', 'ped_elapsed': 13, 'ped_truncate': True, 'track_current': False}, [9, 2]), ({'state': 'green', 'elapsed': 8, 'min_green': 13, 'preempt_min_green': 2, 'yellow': 5, 'red': 1, 'fdw': 14, 'ped': 'walk', 'ped_elapsed': 6, 'ped_truncate': False, 'track_current': False}, [20, 14]), ({'state': 'green', 'elapsed': 2, 'min_green': 13, 'preempt_min_green': 10, 'yellow': 4, 'red': 2, 'fdw': 24, 'ped': 'walk', 'ped_elapsed': 18, 'ped_truncate': True, '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': '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': 13, 'preempt_min_green': 3, 'yellow': 3, 'red': 2, 'fdw': 25, 'ped': 'walk', 'ped_elapsed': 16, 'ped_truncate': True, 'track_current': False}, [5, 0]), ({'state': 'green', 'elapsed': 6, 'min_green': 13, 'preempt_min_green': 8, 'yellow': 3, 'red': 3, 'fdw': 18, 'ped': 'walk', 'ped_elapsed': 4, 'ped_truncate': False, 'track_current': False}, [24, 18]), ({'state': 'red', 'elapsed': 5, 'min_green': 13, 'preempt_min_green': 10, 'yellow': 4, 'red': 1, 'fdw': 17, 'ped': 'none', 'ped_elapsed': 15, 'ped_truncate': False, 'track_current': True}, [0, 0]), ({'state': 'green', 'elapsed': 2, 'min_green': 19, 'preempt_min_green': 7, 'yellow': 6, 'red': 3, 'fdw': 18, 'ped': 'walk', 'ped_elapsed': 20, 'ped_truncate': True, 'track_current': False}, [14, 5]), ({'state': 'green', 'elapsed': 14, 'min_green': 18, 'preempt_min_green': 7, 'yellow': 5, 'red': 2, 'fdw': 12, 'ped': 'walk', 'ped_elapsed': 5, 'ped_truncate': False, 'track_current': False}, [19, 12]), ({'state': 'green', 'elapsed': 3, 'min_green': 16, 'preempt_min_green': 5, 'yellow': 3, 'red': 1, 'fdw': 21, 'ped': 'walk', 'ped_elapsed': 15, 'ped_truncate': True, 'track_current': False}, [6, 2])], [({'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': 19, 'preempt_min_green': 4, 'yellow': 4, 'red': 2, 'fdw': 21, 'ped': 'walk', 'ped_elapsed': 13, 'ped_truncate': False, 'track_current': False}, [27, 21]), ({'state': 'red', 'elapsed': 19, 'min_green': 10, 'preempt_min_green': 6, 'yellow': 4, 'red': 1, 'fdw': 25, 'ped': 'none', 'ped_elapsed': 4, 'ped_truncate': False, 'track_current': True}, [0, 0]), ({'state': 'green', 'elapsed': 14, 'min_green': 8, 'preempt_min_green': 2, 'yellow': 6, 'red': 3, 'fdw': 12, 'ped': 'walk', 'ped_elapsed': 4, 'ped_truncate': True, 'track_current': False}, [9, 0]), ({'state': 'green', 'elapsed': 19, 'min_green': 15, 'preempt_min_green': 8, 'yellow': 6, 'red': 1, 'fdw': 16, 'ped': 'walk', 'ped_elapsed': 8, 'ped_truncate': False, 'track_current': False}, [23, 16]), ({'state': 'green', 'elapsed': 11, 'min_green': 16, 'preempt_min_green': 6, 'yellow': 5, 'red': 3, 'fdw': 14, 'ped': 'walk', 'ped_elapsed': 3, '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': 9, 'min_green': 8, 'preempt_min_green': 10, 'yellow': 4, 'red': 1, 'fdw': 18, 'ped': 'walk', 'ped_elapsed': 16, 'ped_truncate': True, 'track_current': False}, [6, 1])], [({'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': 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': 19, 'min_green': 10, 'preempt_min_green': 3, 'yellow': 6, 'red': 2, 'fdw': 8, 'ped': 'walk', 'ped_elapsed': 17, 'ped_truncate': True, 'track_current': False}, [8, 0]), ({'state': 'green', 'elapsed': 6, 'min_green': 13, 'preempt_min_green': 9, 'yellow': 4, 'red': 2, 'fdw': 15, 'ped': 'none', 'ped_elapsed': 14, 'ped_truncate': False, 'track_current': False}, [9, 3]), ({'state': 'green', 'elapsed': 13, 'min_green': 18, 'preempt_min_green': 2, 'yellow': 4, 'red': 3, 'fdw': 23, 'ped': 'walk', 'ped_elapsed': 15, 'ped_truncate': True, 'track_current': False}, [7, 0]), ({'state': 'green', 'elapsed': 6, 'min_green': 14, 'preempt_min_green': 9, 'yellow': 5, 'red': 3, 'fdw': 14, 'ped': 'walk', 'ped_elapsed': 6, 'ped_truncate': True, 'track_current': False}, [11, 3]), ({'state': 'green', 'elapsed': 12, 'min_green': 16, 'preempt_min_green': 9, 'yellow': 4, 'red': 3, 'fdw': 19, 'ped': 'walk', 'ped_elapsed': 4, 'ped_truncate': False, 'track_current': False}, [26, 19]), ({'state': 'green', 'elapsed': 6, 'min_green': 16, 'preempt_min_green': 10, 'yellow': 6, 'red': 1, 'fdw': 18, 'ped': 'walk', 'ped_elapsed': 11, 'ped_truncate': False, 'track_current': False}, [25, 18])], [({'state': 'green', 'elapsed': 4, 'min_green': 20, 'preempt_min_green': 8, 'yellow': 5, 'red': 1, 'fdw': 9, 'ped': 'walk', 'ped_elapsed': 9, 'ped_truncate': False, 'track_current': False}, [15, 9]), ({'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': 4, 'min_green': 19, 'preempt_min_green': 3, 'yellow': 6, 'red': 2, 'fdw': 24, 'ped': 'walk', 'ped_elapsed': 1, 'ped_truncate': True, 'track_current': False}, [8, 0]), ({'state': 'yellow', 'elapsed': 12, 'min_green': 9, 'preempt_min_green': 7, 'yellow': 6, 'red': 3, 'fdw': 8, 'ped': 'none', 'ped_elapsed': 8, 'ped_truncate': True, 'track_current': False}, [3, 0]), ({'state': 'green', 'elapsed': 12, 'min_green': 10, 'preempt_min_green': 9, 'yellow': 4, 'red': 3, 'fdw': 10, 'ped': 'walk', 'ped_elapsed': 9, 'ped_truncate': True, 'track_current': False}, [7, 0]), ({'state': 'green', 'elapsed': 0, 'min_green': 18, 'preempt_min_green': 2, 'yellow': 5, 'red': 1, 'fdw': 10, 'ped': 'walk', 'ped_elapsed': 6, 'ped_truncate': False, 'track_current': False}, [16, 10]), ({'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': 19, 'min_green': 15, 'preempt_min_green': 9, 'yellow': 3, 'red': 2, 'fdw': 8, 'ped': 'walk', 'ped_elapsed': 3, 'ped_truncate': True, 'track_current': False}, [5, 0])]]\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-walk-abandon","generated_at":"2026-09-29T14:47:59.740500+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 walk abandonment rule so that the step reads `ped = 0 if x['ped_truncate'] else f`.","root_cause":"An interrupted walk always times a full FDW, ignoring the ped_truncate setting.","sha256":"3f5e2e99c9f08363aafe3684ebdac940377d24bd918d62347c666a4ef5da4eca","title":"Railroad preemption entry timing: FDW is timed even when pedestrian truncation is enabled · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":39.714,"exit_code":1,"observations":[{"actual":[0,0],"check":"timing oracle 0","expected":[0,0],"passed":true},{"actual":[4,0],"check":"timing oracle 1","expected":[4,0],"passed":true},{"actual":[14,8],"check":"timing oracle 2","expected":[14,8],"passed":true},{"actual":[6,2],"check":"timing oracle 3","expected":[6,2],"passed":true},{"actual":[5,0],"check":"timing oracle 4","expected":[16,11],"passed":false},{"actual":[9,2],"check":"timing oracle 5","expected":[9,2],"passed":true},{"actual":[6,0],"check":"timing oracle 6","expected":[20,14],"passed":false},{"actual":[14,8],"check":"timing oracle 7","expected":[14,8],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"timing oracle 0\", \"actual\": [0, 0], \"expected\": [0, 0], \"passed\": true}, {\"check\": \"timing oracle 1\", \"actual\": [4, 0], \"expected\": [4, 0], \"passed\": true}, {\"check\": \"timing oracle 2\", \"actual\": [14, 8], \"expected\": [14, 8], \"passed\": true}, {\"check\": \"timing oracle 3\", \"actual\": [6, 2], \"expected\": [6, 2], \"passed\": true}, {\"check\": \"timing oracle 4\", \"actual\": [5, 0], \"expected\": [16, 11], \"passed\": false}, {\"check\": \"timing oracle 5\", \"actual\": [9, 2], \"expected\": [9, 2], \"passed\": true}, {\"check\": \"timing oracle 6\", \"actual\": [6, 0], \"expected\": [20, 14], \"passed\": false}, {\"check\": \"timing oracle 7\", \"actual\": [14, 8], \"expected\": [14, 8], \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":41.422,"exit_code":1,"observations":[{"actual":[0,0],"check":"timing oracle 0","expected":[0,0],"passed":true},{"actual":[4,0],"check":"timing oracle 1","expected":[4,0],"passed":true},{"actual":[14,8],"check":"timing oracle 2","expected":[14,8],"passed":true},{"actual":[15,11],"check":"timing oracle 3","expected":[6,2],"passed":false},{"actual":[16,11],"check":"timing oracle 4","expected":[16,11],"passed":true},{"actual":[20,13],"check":"timing oracle 5","expected":[9,2],"passed":false},{"actual":[20,14],"check":"timing oracle 6","expected":[20,14],"passed":true},{"actual":[30,24],"check":"timing oracle 7","expected":[14,8],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"timing oracle 0\", \"actual\": [0, 0], \"expected\": [0, 0], \"passed\": true}, {\"check\": \"timing oracle 1\", \"actual\": [4, 0], \"expected\": [4, 0], \"passed\": true}, {\"check\": \"timing oracle 2\", \"actual\": [14, 8], \"expected\": [14, 8], \"passed\": true}, {\"check\": \"timing oracle 3\", \"actual\": [15, 11], \"expected\": [6, 2], \"passed\": false}, {\"check\": \"timing oracle 4\", \"actual\": [16, 11], \"expected\": [16, 11], \"passed\": true}, {\"check\": \"timing oracle 5\", \"actual\": [20, 13], \"expected\": [9, 2], \"passed\": false}, {\"check\": \"timing oracle 6\", \"actual\": [20, 14], \"expected\": [20, 14], \"passed\": true}, {\"check\": \"timing oracle 7\", \"actual\": [30, 24], \"expected\": [14, 8], \"passed\": false}], \"passed\": false}\n"},"fixed":{"elapsed_ms":42.738,"exit_code":0,"observations":[{"actual":[0,0],"check":"timing oracle 0","expected":[0,0],"passed":true},{"actual":[4,0],"check":"timing oracle 1","expected":[4,0],"passed":true},{"actual":[14,8],"check":"timing oracle 2","expected":[14,8],"passed":true},{"actual":[6,2],"check":"timing oracle 3","expected":[6,2],"passed":true},{"actual":[16,11],"check":"timing oracle 4","expected":[16,11],"passed":true},{"actual":[9,2],"check":"timing oracle 5","expected":[9,2],"passed":true},{"actual":[20,14],"check":"timing oracle 6","expected":[20,14],"passed":true},{"actual":[14,8],"check":"timing oracle 7","expected":[14,8],"passed":true}],"passed":true,"stderr":"","stdout":"{\"observations\": [{\"check\": \"timing oracle 0\", \"actual\": [0, 0], \"expected\": [0, 0], \"passed\": true}, {\"check\": \"timing oracle 1\", \"actual\": [4, 0], \"expected\": [4, 0], \"passed\": true}, {\"check\": \"timing oracle 2\", \"actual\": [14, 8], \"expected\": [14, 8], \"passed\": true}, {\"check\": \"timing oracle 3\", \"actual\": [6, 2], \"expected\": [6, 2], \"passed\": true}, {\"check\": \"timing oracle 4\", \"actual\": [16, 11], \"expected\": [16, 11], \"passed\": true}, {\"check\": \"timing oracle 5\", \"actual\": [9, 2], \"expected\": [9, 2], \"passed\": true}, {\"check\": \"timing oracle 6\", \"actual\": [20, 14], \"expected\": [20, 14], \"passed\": true}, {\"check\": \"timing oracle 7\", \"actual\": [14, 8], \"expected\": [14, 8], \"passed\": true}], \"passed\": true}\n"}},"verified":true,"visibility":"public"}