{"abstract":"Yellow and all-red intervals returns a wrong result when the yellow interval is truncated to tenths.","category":"Traffic signal timing plans","checks":8,"contract":"Input {speed_mph, grade_pct (uphill positive), reaction_tenths, decel ft/s^2, width_ft, veh_len_ft, crosswalk_ft, ped}. v = 1.467*speed ft/s; yellow = t + v/(2a + 2*32.2*grade/100), rounded UP to 0.1 s and clamped to [3.0, 6.0]; a non-positive denominator returns 'invalid'. All-red = (W + vehicle length)/v where W includes the far crosswalk when ped is true, rounded UP to 0.1 s and clamped to [1.0, 6.0]. Return tenths.","contract_signature":"x","evaluation_group":"w2-traffic_signal_timing_plans-change-clearance","failed_approach":"Rounding up to whole seconds overshoots the stipulated tenth-of-second resolution.","family":"w2-traffic_signal_timing_plans-change-clearance-yellow-rounding","id":"FA-67916","implementations":{"attempt":{"sha256":"70394a9d3f806ae2c1e531ea31120d50a447b5f1a3e1c8841735857750ddc9cd","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\nfrom fractions import Fraction\nimport math\nN = 1\nobservations = []\ndef solve(x):\n    v = Fraction(x['speed_mph']) * Fraction(1467, 1000)\n    t = Fraction(x['reaction_tenths'], 10)\n    den = 2 * x['decel'] + 2 * Fraction(322, 10) * Fraction(x['grade_pct'], 100)\n    if den <= 0:\n        return 'invalid'\n    yl = max(30, min(60, math.ceil(t + v / den) * 10))\n    w = x['width_ft'] + (x['crosswalk_ft'] if x['ped'] else 0)\n    rd = max(10, min(60, math.ceil((w + x['veh_len_ft']) / v * 10)))\n    return {'yellow_tenths': yl, 'red_tenths': rd}\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[({'speed_mph': 65, 'grade_pct': 0, 'reaction_tenths': 8, 'decel': 8, 'width_ft': 53, 'veh_len_ft': 20, 'crosswalk_ft': 15, 'ped': False}, {'yellow_tenths': 60, 'red_tenths': 10}), ({'speed_mph': 30, 'grade_pct': 0, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 60, 'veh_len_ft': 20, 'crosswalk_ft': 12, 'ped': False}, {'yellow_tenths': 33, 'red_tenths': 19}), ({'speed_mph': 65, 'grade_pct': -7, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 120, 'veh_len_ft': 20, 'crosswalk_ft': 10, 'ped': True}, {'yellow_tenths': 60, 'red_tenths': 16}), ({'speed_mph': 30, 'grade_pct': -8, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 44, 'veh_len_ft': 40, 'crosswalk_ft': 10, 'ped': False}, {'yellow_tenths': 40, 'red_tenths': 20}), ({'speed_mph': 25, 'grade_pct': -4, 'reaction_tenths': 10, 'decel': 12, 'width_ft': 111, 'veh_len_ft': 40, 'crosswalk_ft': 12, 'ped': False}, {'yellow_tenths': 30, 'red_tenths': 42}), ({'speed_mph': 35, 'grade_pct': 0, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 81, 'veh_len_ft': 20, 'crosswalk_ft': 10, 'ped': False}, {'yellow_tenths': 36, 'red_tenths': 20}), ({'speed_mph': 45, 'grade_pct': -4, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 80, 'veh_len_ft': 20, 'crosswalk_ft': 10, 'ped': True}, {'yellow_tenths': 48, 'red_tenths': 17}), ({'speed_mph': 70, 'grade_pct': -4, 'reaction_tenths': 10, 'decel': 11, 'width_ft': 70, 'veh_len_ft': 16, 'crosswalk_ft': 10, 'ped': False}, {'yellow_tenths': 60, 'red_tenths': 10})], [({'speed_mph': 55, 'grade_pct': 7, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 96, 'veh_len_ft': 20, 'crosswalk_ft': 8, 'ped': False}, {'yellow_tenths': 43, 'red_tenths': 15}), ({'speed_mph': 30, 'grade_pct': 0, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 60, 'veh_len_ft': 20, 'crosswalk_ft': 12, 'ped': False}, {'yellow_tenths': 33, 'red_tenths': 19}), ({'speed_mph': 60, 'grade_pct': -3, 'reaction_tenths': 15, 'decel': 8, 'width_ft': 79, 'veh_len_ft': 16, 'crosswalk_ft': 10, 'ped': False}, {'yellow_tenths': 60, 'red_tenths': 11}), ({'speed_mph': 40, 'grade_pct': 4, 'reaction_tenths': 10, 'decel': 8, 'width_ft': 55, 'veh_len_ft': 40, 'crosswalk_ft': 15, 'ped': True}, {'yellow_tenths': 42, 'red_tenths': 19}), ({'speed_mph': 65, 'grade_pct': -7, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 120, 'veh_len_ft': 20, 'crosswalk_ft': 10, 'ped': True}, {'yellow_tenths': 60, 'red_tenths': 16}), ({'speed_mph': 25, 'grade_pct': -5, 'reaction_tenths': 8, 'decel': 11, 'width_ft': 43, 'veh_len_ft': 16, 'crosswalk_ft': 8, 'ped': True}, {'yellow_tenths': 30, 'red_tenths': 19}), ({'speed_mph': 45, 'grade_pct': -4, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 80, 'veh_len_ft': 20, 'crosswalk_ft': 10, 'ped': True}, {'yellow_tenths': 48, 'red_tenths': 17}), ({'speed_mph': 65, 'grade_pct': -6, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 55, 'veh_len_ft': 20, 'crosswalk_ft': 15, 'ped': False}, {'yellow_tenths': 60, 'red_tenths': 10})], [({'speed_mph': 70, 'grade_pct': 2, 'reaction_tenths': 12, 'decel': 8, 'width_ft': 119, 'veh_len_ft': 20, 'crosswalk_ft': 10, 'ped': True}, {'yellow_tenths': 60, 'red_tenths': 15}), ({'speed_mph': 30, 'grade_pct': -1, 'reaction_tenths': 12, 'decel': 8, 'width_ft': 59, 'veh_len_ft': 40, 'crosswalk_ft': 10, 'ped': True}, {'yellow_tenths': 41, 'red_tenths': 25}), ({'speed_mph': 50, 'grade_pct': 6, 'reaction_tenths': 12, 'decel': 8, 'width_ft': 132, 'veh_len_ft': 25, 'crosswalk_ft': 12, 'ped': True}, {'yellow_tenths': 49, 'red_tenths': 24}), ({'speed_mph': 45, 'grade_pct': -4, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 80, 'veh_len_ft': 20, 'crosswalk_ft': 10, 'ped': True}, {'yellow_tenths': 48, 'red_tenths': 17}), ({'speed_mph': 30, 'grade_pct': 0, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 60, 'veh_len_ft': 20, 'crosswalk_ft': 12, 'ped': False}, {'yellow_tenths': 33, 'red_tenths': 19}), ({'speed_mph': 65, 'grade_pct': -7, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 120, 'veh_len_ft': 20, 'crosswalk_ft': 10, 'ped': True}, {'yellow_tenths': 60, 'red_tenths': 16}), ({'speed_mph': 20, 'grade_pct': -4, 'reaction_tenths': 10, 'decel': 11, 'width_ft': 114, 'veh_len_ft': 20, 'crosswalk_ft': 12, 'ped': False}, {'yellow_tenths': 30, 'red_tenths': 46}), ({'speed_mph': 65, 'grade_pct': -6, 'reaction_tenths': 8, 'decel': 8, 'width_ft': 69, 'veh_len_ft': 20, 'crosswalk_ft': 15, 'ped': False}, {'yellow_tenths': 60, 'red_tenths': 10})], [({'speed_mph': 30, 'grade_pct': 3, 'reaction_tenths': 10, 'decel': 8, 'width_ft': 130, 'veh_len_ft': 20, 'crosswalk_ft': 15, 'ped': True}, {'yellow_tenths': 35, 'red_tenths': 38}), ({'speed_mph': 65, 'grade_pct': -7, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 120, 'veh_len_ft': 20, 'crosswalk_ft': 10, 'ped': True}, {'yellow_tenths': 60, 'red_tenths': 16}), ({'speed_mph': 30, 'grade_pct': 0, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 60, 'veh_len_ft': 20, 'crosswalk_ft': 12, 'ped': False}, {'yellow_tenths': 33, 'red_tenths': 19}), ({'speed_mph': 20, 'grade_pct': -6, 'reaction_tenths': 12, 'decel': 11, 'width_ft': 58, 'veh_len_ft': 25, 'crosswalk_ft': 12, 'ped': True}, {'yellow_tenths': 30, 'red_tenths': 33}), ({'speed_mph': 70, 'grade_pct': -5, 'reaction_tenths': 15, 'decel': 8, 'width_ft': 92, 'veh_len_ft': 20, 'crosswalk_ft': 12, 'ped': False}, {'yellow_tenths': 60, 'red_tenths': 11}), ({'speed_mph': 20, 'grade_pct': 1, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 47, 'veh_len_ft': 25, 'crosswalk_ft': 12, 'ped': False}, {'yellow_tenths': 30, 'red_tenths': 25}), ({'speed_mph': 40, 'grade_pct': 6, 'reaction_tenths': 12, 'decel': 10, 'width_ft': 56, 'veh_len_ft': 25, 'crosswalk_ft': 12, 'ped': False}, {'yellow_tenths': 37, 'red_tenths': 14}), ({'speed_mph': 45, 'grade_pct': -4, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 80, 'veh_len_ft': 20, 'crosswalk_ft': 10, 'ped': True}, {'yellow_tenths': 48, 'red_tenths': 17})], [({'speed_mph': 65, 'grade_pct': -7, 'reaction_tenths': 12, 'decel': 10, 'width_ft': 98, 'veh_len_ft': 20, 'crosswalk_ft': 12, 'ped': True}, {'yellow_tenths': 60, 'red_tenths': 14}), ({'speed_mph': 70, 'grade_pct': 6, 'reaction_tenths': 10, 'decel': 11, 'width_ft': 113, 'veh_len_ft': 25, 'crosswalk_ft': 10, 'ped': True}, {'yellow_tenths': 50, 'red_tenths': 15}), ({'speed_mph': 50, 'grade_pct': -7, 'reaction_tenths': 12, 'decel': 12, 'width_ft': 106, 'veh_len_ft': 20, 'crosswalk_ft': 12, 'ped': True}, {'yellow_tenths': 50, 'red_tenths': 19}), ({'speed_mph': 65, 'grade_pct': -7, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 120, 'veh_len_ft': 20, 'crosswalk_ft': 10, 'ped': True}, {'yellow_tenths': 60, 'red_tenths': 16}), ({'speed_mph': 20, 'grade_pct': -3, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 51, 'veh_len_ft': 16, 'crosswalk_ft': 12, 'ped': False}, {'yellow_tenths': 30, 'red_tenths': 23}), ({'speed_mph': 30, 'grade_pct': -2, 'reaction_tenths': 8, 'decel': 11, 'width_ft': 101, 'veh_len_ft': 16, 'crosswalk_ft': 8, 'ped': False}, {'yellow_tenths': 30, 'red_tenths': 27}), ({'speed_mph': 45, 'grade_pct': -4, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 80, 'veh_len_ft': 20, 'crosswalk_ft': 10, 'ped': True}, {'yellow_tenths': 48, 'red_tenths': 17}), ({'speed_mph': 30, 'grade_pct': 0, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 60, 'veh_len_ft': 20, 'crosswalk_ft': 12, 'ped': False}, {'yellow_tenths': 33, 'red_tenths': 19})]]\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":"e257ae78000c7f54928f826dc1a4cf3a06eb7ac41b732e18434d39a67474bdfb","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\nfrom fractions import Fraction\nimport math\nN = 1\nobservations = []\ndef solve(x):\n    v = Fraction(x['speed_mph']) * Fraction(1467, 1000)\n    t = Fraction(x['reaction_tenths'], 10)\n    den = 2 * x['decel'] + 2 * Fraction(322, 10) * Fraction(x['grade_pct'], 100)\n    if den <= 0:\n        return 'invalid'\n    yl = max(30, min(60, int((t + v / den) * 10)))\n    w = x['width_ft'] + (x['crosswalk_ft'] if x['ped'] else 0)\n    rd = max(10, min(60, math.ceil((w + x['veh_len_ft']) / v * 10)))\n    return {'yellow_tenths': yl, 'red_tenths': rd}\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[({'speed_mph': 65, 'grade_pct': 0, 'reaction_tenths': 8, 'decel': 8, 'width_ft': 53, 'veh_len_ft': 20, 'crosswalk_ft': 15, 'ped': False}, {'yellow_tenths': 60, 'red_tenths': 10}), ({'speed_mph': 30, 'grade_pct': 0, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 60, 'veh_len_ft': 20, 'crosswalk_ft': 12, 'ped': False}, {'yellow_tenths': 33, 'red_tenths': 19}), ({'speed_mph': 65, 'grade_pct': -7, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 120, 'veh_len_ft': 20, 'crosswalk_ft': 10, 'ped': True}, {'yellow_tenths': 60, 'red_tenths': 16}), ({'speed_mph': 30, 'grade_pct': -8, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 44, 'veh_len_ft': 40, 'crosswalk_ft': 10, 'ped': False}, {'yellow_tenths': 40, 'red_tenths': 20}), ({'speed_mph': 25, 'grade_pct': -4, 'reaction_tenths': 10, 'decel': 12, 'width_ft': 111, 'veh_len_ft': 40, 'crosswalk_ft': 12, 'ped': False}, {'yellow_tenths': 30, 'red_tenths': 42}), ({'speed_mph': 35, 'grade_pct': 0, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 81, 'veh_len_ft': 20, 'crosswalk_ft': 10, 'ped': False}, {'yellow_tenths': 36, 'red_tenths': 20}), ({'speed_mph': 45, 'grade_pct': -4, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 80, 'veh_len_ft': 20, 'crosswalk_ft': 10, 'ped': True}, {'yellow_tenths': 48, 'red_tenths': 17}), ({'speed_mph': 70, 'grade_pct': -4, 'reaction_tenths': 10, 'decel': 11, 'width_ft': 70, 'veh_len_ft': 16, 'crosswalk_ft': 10, 'ped': False}, {'yellow_tenths': 60, 'red_tenths': 10})], [({'speed_mph': 55, 'grade_pct': 7, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 96, 'veh_len_ft': 20, 'crosswalk_ft': 8, 'ped': False}, {'yellow_tenths': 43, 'red_tenths': 15}), ({'speed_mph': 30, 'grade_pct': 0, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 60, 'veh_len_ft': 20, 'crosswalk_ft': 12, 'ped': False}, {'yellow_tenths': 33, 'red_tenths': 19}), ({'speed_mph': 60, 'grade_pct': -3, 'reaction_tenths': 15, 'decel': 8, 'width_ft': 79, 'veh_len_ft': 16, 'crosswalk_ft': 10, 'ped': False}, {'yellow_tenths': 60, 'red_tenths': 11}), ({'speed_mph': 40, 'grade_pct': 4, 'reaction_tenths': 10, 'decel': 8, 'width_ft': 55, 'veh_len_ft': 40, 'crosswalk_ft': 15, 'ped': True}, {'yellow_tenths': 42, 'red_tenths': 19}), ({'speed_mph': 65, 'grade_pct': -7, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 120, 'veh_len_ft': 20, 'crosswalk_ft': 10, 'ped': True}, {'yellow_tenths': 60, 'red_tenths': 16}), ({'speed_mph': 25, 'grade_pct': -5, 'reaction_tenths': 8, 'decel': 11, 'width_ft': 43, 'veh_len_ft': 16, 'crosswalk_ft': 8, 'ped': True}, {'yellow_tenths': 30, 'red_tenths': 19}), ({'speed_mph': 45, 'grade_pct': -4, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 80, 'veh_len_ft': 20, 'crosswalk_ft': 10, 'ped': True}, {'yellow_tenths': 48, 'red_tenths': 17}), ({'speed_mph': 65, 'grade_pct': -6, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 55, 'veh_len_ft': 20, 'crosswalk_ft': 15, 'ped': False}, {'yellow_tenths': 60, 'red_tenths': 10})], [({'speed_mph': 70, 'grade_pct': 2, 'reaction_tenths': 12, 'decel': 8, 'width_ft': 119, 'veh_len_ft': 20, 'crosswalk_ft': 10, 'ped': True}, {'yellow_tenths': 60, 'red_tenths': 15}), ({'speed_mph': 30, 'grade_pct': -1, 'reaction_tenths': 12, 'decel': 8, 'width_ft': 59, 'veh_len_ft': 40, 'crosswalk_ft': 10, 'ped': True}, {'yellow_tenths': 41, 'red_tenths': 25}), ({'speed_mph': 50, 'grade_pct': 6, 'reaction_tenths': 12, 'decel': 8, 'width_ft': 132, 'veh_len_ft': 25, 'crosswalk_ft': 12, 'ped': True}, {'yellow_tenths': 49, 'red_tenths': 24}), ({'speed_mph': 45, 'grade_pct': -4, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 80, 'veh_len_ft': 20, 'crosswalk_ft': 10, 'ped': True}, {'yellow_tenths': 48, 'red_tenths': 17}), ({'speed_mph': 30, 'grade_pct': 0, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 60, 'veh_len_ft': 20, 'crosswalk_ft': 12, 'ped': False}, {'yellow_tenths': 33, 'red_tenths': 19}), ({'speed_mph': 65, 'grade_pct': -7, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 120, 'veh_len_ft': 20, 'crosswalk_ft': 10, 'ped': True}, {'yellow_tenths': 60, 'red_tenths': 16}), ({'speed_mph': 20, 'grade_pct': -4, 'reaction_tenths': 10, 'decel': 11, 'width_ft': 114, 'veh_len_ft': 20, 'crosswalk_ft': 12, 'ped': False}, {'yellow_tenths': 30, 'red_tenths': 46}), ({'speed_mph': 65, 'grade_pct': -6, 'reaction_tenths': 8, 'decel': 8, 'width_ft': 69, 'veh_len_ft': 20, 'crosswalk_ft': 15, 'ped': False}, {'yellow_tenths': 60, 'red_tenths': 10})], [({'speed_mph': 30, 'grade_pct': 3, 'reaction_tenths': 10, 'decel': 8, 'width_ft': 130, 'veh_len_ft': 20, 'crosswalk_ft': 15, 'ped': True}, {'yellow_tenths': 35, 'red_tenths': 38}), ({'speed_mph': 65, 'grade_pct': -7, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 120, 'veh_len_ft': 20, 'crosswalk_ft': 10, 'ped': True}, {'yellow_tenths': 60, 'red_tenths': 16}), ({'speed_mph': 30, 'grade_pct': 0, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 60, 'veh_len_ft': 20, 'crosswalk_ft': 12, 'ped': False}, {'yellow_tenths': 33, 'red_tenths': 19}), ({'speed_mph': 20, 'grade_pct': -6, 'reaction_tenths': 12, 'decel': 11, 'width_ft': 58, 'veh_len_ft': 25, 'crosswalk_ft': 12, 'ped': True}, {'yellow_tenths': 30, 'red_tenths': 33}), ({'speed_mph': 70, 'grade_pct': -5, 'reaction_tenths': 15, 'decel': 8, 'width_ft': 92, 'veh_len_ft': 20, 'crosswalk_ft': 12, 'ped': False}, {'yellow_tenths': 60, 'red_tenths': 11}), ({'speed_mph': 20, 'grade_pct': 1, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 47, 'veh_len_ft': 25, 'crosswalk_ft': 12, 'ped': False}, {'yellow_tenths': 30, 'red_tenths': 25}), ({'speed_mph': 40, 'grade_pct': 6, 'reaction_tenths': 12, 'decel': 10, 'width_ft': 56, 'veh_len_ft': 25, 'crosswalk_ft': 12, 'ped': False}, {'yellow_tenths': 37, 'red_tenths': 14}), ({'speed_mph': 45, 'grade_pct': -4, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 80, 'veh_len_ft': 20, 'crosswalk_ft': 10, 'ped': True}, {'yellow_tenths': 48, 'red_tenths': 17})], [({'speed_mph': 65, 'grade_pct': -7, 'reaction_tenths': 12, 'decel': 10, 'width_ft': 98, 'veh_len_ft': 20, 'crosswalk_ft': 12, 'ped': True}, {'yellow_tenths': 60, 'red_tenths': 14}), ({'speed_mph': 70, 'grade_pct': 6, 'reaction_tenths': 10, 'decel': 11, 'width_ft': 113, 'veh_len_ft': 25, 'crosswalk_ft': 10, 'ped': True}, {'yellow_tenths': 50, 'red_tenths': 15}), ({'speed_mph': 50, 'grade_pct': -7, 'reaction_tenths': 12, 'decel': 12, 'width_ft': 106, 'veh_len_ft': 20, 'crosswalk_ft': 12, 'ped': True}, {'yellow_tenths': 50, 'red_tenths': 19}), ({'speed_mph': 65, 'grade_pct': -7, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 120, 'veh_len_ft': 20, 'crosswalk_ft': 10, 'ped': True}, {'yellow_tenths': 60, 'red_tenths': 16}), ({'speed_mph': 20, 'grade_pct': -3, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 51, 'veh_len_ft': 16, 'crosswalk_ft': 12, 'ped': False}, {'yellow_tenths': 30, 'red_tenths': 23}), ({'speed_mph': 30, 'grade_pct': -2, 'reaction_tenths': 8, 'decel': 11, 'width_ft': 101, 'veh_len_ft': 16, 'crosswalk_ft': 8, 'ped': False}, {'yellow_tenths': 30, 'red_tenths': 27}), ({'speed_mph': 45, 'grade_pct': -4, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 80, 'veh_len_ft': 20, 'crosswalk_ft': 10, 'ped': True}, {'yellow_tenths': 48, 'red_tenths': 17}), ({'speed_mph': 30, 'grade_pct': 0, 'reaction_tenths': 10, 'decel': 10, 'width_ft': 60, 'veh_len_ft': 20, 'crosswalk_ft': 12, 'ped': False}, {'yellow_tenths': 33, 'red_tenths': 19})]]\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-change-clearance-yellow-rounding","generated_at":"2026-09-29T14:47:57.243334+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":"Truncation shortens the yellow below the computed minimum by up to 0.1 s.","sha256":"30835da96710f0bdf29c23311d84feeeb44afcb075ba07cde95c73a917980fa6","title":"Yellow and all-red intervals: the yellow interval is truncated to tenths · 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":41.884,"exit_code":1,"observations":[{"actual":{"red_tenths":10,"yellow_tenths":60},"check":"timing oracle 0","expected":{"red_tenths":10,"yellow_tenths":60},"passed":true},{"actual":{"red_tenths":19,"yellow_tenths":40},"check":"timing oracle 1","expected":{"red_tenths":19,"yellow_tenths":33},"passed":false},{"actual":{"red_tenths":16,"yellow_tenths":60},"check":"timing oracle 2","expected":{"red_tenths":16,"yellow_tenths":60},"passed":true},{"actual":{"red_tenths":20,"yellow_tenths":40},"check":"timing oracle 3","expected":{"red_tenths":20,"yellow_tenths":40},"passed":true},{"actual":{"red_tenths":42,"yellow_tenths":30},"check":"timing oracle 4","expected":{"red_tenths":42,"yellow_tenths":30},"passed":true},{"actual":{"red_tenths":20,"yellow_tenths":40},"check":"timing oracle 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