{"abstract":"Street meter time purchase returns a wrong result when a purchase at exactly enforcement end is processed.","category":"Toll and parking fee computation","checks":8,"contract":"Input {now, expiry (or null), paid_cents, rate_per_hour, max_minutes, enf_start, enf_end, increment}. Only whole increments are credited. At or after enforcement end nothing is sold: [null, 0]. Paid time starts at the later of now, enforcement start and any unexpired expiry; it ends at the earliest of start + purchased minutes (floor), max(now, enf_start) + max_minutes, and enf_end. Accepted cents = min(credited, ceil(used minutes * rate/60)). Return [new expiry, accepted cents].","evaluation_group":"w2-toll_and_parking_fee_computation-meter-purchase","failed_approach":"Only rejecting when no time is on the meter still processes after-hours top-ups.","family":"w2-toll_and_parking_fee_computation-meter-purchase-after-hours","id":"FA-68481","implementations":{"attempt":{"sha256":"80b6d11a54f4f8f78d941ad1ae8517754cad2aea74a9fc139f6ac31d86a63e77","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(x):\n    inc = x['increment']\n    c = x['paid_cents'] - x['paid_cents'] % inc\n    now = x['now']\n    if now >= x['enf_end'] and x['expiry'] is None:\n        return [None, 0]\n    base = max(now, x['enf_start'])\n    start = base if x['expiry'] is None else max(base, x['expiry'])\n    mins = c * 60 // x['rate_per_hour']\n    end = min(start + mins, base + x['max_minutes'], x['enf_end'])\n    used = max(0, end - start)\n    cost = min(c, -(-used * x['rate_per_hour'] // 60))\n    return [max(end, start), cost]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[({'now': 1080, 'expiry': 1078, 'paid_cents': 85, 'rate_per_hour': 100, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [None, 0]), ({'now': 1080, 'expiry': None, 'paid_cents': 480, 'rate_per_hour': 100, 'max_minutes': 240, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [None, 0]), ({'now': 600, 'expiry': 650, 'paid_cents': 400, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [720, 234]), ({'now': 1040, 'expiry': None, 'paid_cents': 333, 'rate_per_hour': 150, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [1080, 100]), ({'now': 1350, 'expiry': 1335, 'paid_cents': 5, 'rate_per_hour': 250, 'max_minutes': 60, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [None, 0]), ({'now': 1080, 'expiry': 1071, 'paid_cents': 491, 'rate_per_hour': 250, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [None, 0]), ({'now': 420, 'expiry': None, 'paid_cents': 200, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [540, 200]), ({'now': 1243, 'expiry': 1214, 'paid_cents': 292, 'rate_per_hour': 200, 'max_minutes': 60, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [None, 0])], [({'now': 1080, 'expiry': 1152, 'paid_cents': 523, 'rate_per_hour': 150, 'max_minutes': 60, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [None, 0]), ({'now': 420, 'expiry': None, 'paid_cents': 200, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [540, 200]), ({'now': 233, 'expiry': 231, 'paid_cents': 298, 'rate_per_hour': 100, 'max_minutes': 60, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [540, 100]), ({'now': 600, 'expiry': 650, 'paid_cents': 400, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [720, 234]), ({'now': 1080, 'expiry': 1025, 'paid_cents': 393, 'rate_per_hour': 100, 'max_minutes': 240, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [None, 0]), ({'now': 655, 'expiry': None, 'paid_cents': 200, 'rate_per_hour': 150, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [735, 200]), ({'now': 1069, 'expiry': 1154, 'paid_cents': 524, 'rate_per_hour': 150, 'max_minutes': 60, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [1154, 0]), ({'now': 1080, 'expiry': 1100, 'paid_cents': 100, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [None, 0])], [({'now': 1080, 'expiry': 1100, 'paid_cents': 100, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [None, 0]), ({'now': 1040, 'expiry': None, 'paid_cents': 333, 'rate_per_hour': 150, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [1080, 100]), ({'now': 600, 'expiry': 650, 'paid_cents': 400, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [720, 234]), ({'now': 1080, 'expiry': None, 'paid_cents': 109, 'rate_per_hour': 100, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [None, 0]), ({'now': 1221, 'expiry': 1229, 'paid_cents': 328, 'rate_per_hour': 150, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [None, 0]), ({'now': 1208, 'expiry': None, 'paid_cents': 533, 'rate_per_hour': 100, 'max_minutes': 60, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [None, 0]), ({'now': 1080, 'expiry': 1154, 'paid_cents': 297, 'rate_per_hour': 100, 'max_minutes': 240, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [None, 0]), ({'now': 480, 'expiry': None, 'paid_cents': 226, 'rate_per_hour': 100, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [600, 200])], [({'now': 1080, 'expiry': 1168, 'paid_cents': 356, 'rate_per_hour': 200, 'max_minutes': 60, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [None, 0]), ({'now': 1080, 'expiry': None, 'paid_cents': 584, 'rate_per_hour': 100, 'max_minutes': 60, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [None, 0]), ({'now': 1080, 'expiry': None, 'paid_cents': 350, 'rate_per_hour': 200, 'max_minutes': 60, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [None, 0]), ({'now': 600, 'expiry': 650, 'paid_cents': 400, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [720, 234]), ({'now': 480, 'expiry': None, 'paid_cents': 469, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [600, 400]), ({'now': 1040, 'expiry': None, 'paid_cents': 333, 'rate_per_hour': 150, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [1080, 100]), ({'now': 1087, 'expiry': 1093, 'paid_cents': 264, 'rate_per_hour': 100, 'max_minutes': 240, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [None, 0]), ({'now': 420, 'expiry': None, 'paid_cents': 200, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [540, 200])], [({'now': 1040, 'expiry': None, 'paid_cents': 333, 'rate_per_hour': 150, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [1080, 100]), ({'now': 63, 'expiry': 65, 'paid_cents': 478, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [600, 400]), ({'now': 1080, 'expiry': 1106, 'paid_cents': 493, 'rate_per_hour': 150, 'max_minutes': 240, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [None, 0]), ({'now': 480, 'expiry': 511, 'paid_cents': 308, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [600, 297]), ({'now': 1080, 'expiry': 1112, 'paid_cents': 319, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [None, 0]), ({'now': 1080, 'expiry': 1100, 'paid_cents': 100, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [None, 0]), ({'now': 600, 'expiry': 650, 'paid_cents': 400, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [720, 234]), ({'now': 655, 'expiry': None, 'paid_cents': 248, 'rate_per_hour': 200, 'max_minutes': 60, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [715, 200])]]\nfor i, (args, expected) in enumerate(fixtures[N-1]):\n    check('fee 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":"a0d2a88429f86a0480f549741b26768aa8ceea144f778d5dedcb940f67dd0614","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(x):\n    inc = x['increment']\n    c = x['paid_cents'] - x['paid_cents'] % inc\n    now = x['now']\n    if now > x['enf_end']:\n        return [None, 0]\n    base = max(now, x['enf_start'])\n    start = base if x['expiry'] is None else max(base, x['expiry'])\n    mins = c * 60 // x['rate_per_hour']\n    end = min(start + mins, base + x['max_minutes'], x['enf_end'])\n    used = max(0, end - start)\n    cost = min(c, -(-used * x['rate_per_hour'] // 60))\n    return [max(end, start), cost]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[({'now': 1080, 'expiry': 1078, 'paid_cents': 85, 'rate_per_hour': 100, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [None, 0]), ({'now': 1080, 'expiry': None, 'paid_cents': 480, 'rate_per_hour': 100, 'max_minutes': 240, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [None, 0]), ({'now': 600, 'expiry': 650, 'paid_cents': 400, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [720, 234]), ({'now': 1040, 'expiry': None, 'paid_cents': 333, 'rate_per_hour': 150, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [1080, 100]), ({'now': 1350, 'expiry': 1335, 'paid_cents': 5, 'rate_per_hour': 250, 'max_minutes': 60, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [None, 0]), ({'now': 1080, 'expiry': 1071, 'paid_cents': 491, 'rate_per_hour': 250, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [None, 0]), ({'now': 420, 'expiry': None, 'paid_cents': 200, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [540, 200]), ({'now': 1243, 'expiry': 1214, 'paid_cents': 292, 'rate_per_hour': 200, 'max_minutes': 60, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [None, 0])], [({'now': 1080, 'expiry': 1152, 'paid_cents': 523, 'rate_per_hour': 150, 'max_minutes': 60, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [None, 0]), ({'now': 420, 'expiry': None, 'paid_cents': 200, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [540, 200]), ({'now': 233, 'expiry': 231, 'paid_cents': 298, 'rate_per_hour': 100, 'max_minutes': 60, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [540, 100]), ({'now': 600, 'expiry': 650, 'paid_cents': 400, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [720, 234]), ({'now': 1080, 'expiry': 1025, 'paid_cents': 393, 'rate_per_hour': 100, 'max_minutes': 240, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [None, 0]), ({'now': 655, 'expiry': None, 'paid_cents': 200, 'rate_per_hour': 150, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [735, 200]), ({'now': 1069, 'expiry': 1154, 'paid_cents': 524, 'rate_per_hour': 150, 'max_minutes': 60, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [1154, 0]), ({'now': 1080, 'expiry': 1100, 'paid_cents': 100, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [None, 0])], [({'now': 1080, 'expiry': 1100, 'paid_cents': 100, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [None, 0]), ({'now': 1040, 'expiry': None, 'paid_cents': 333, 'rate_per_hour': 150, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [1080, 100]), ({'now': 600, 'expiry': 650, 'paid_cents': 400, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [720, 234]), ({'now': 1080, 'expiry': None, 'paid_cents': 109, 'rate_per_hour': 100, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [None, 0]), ({'now': 1221, 'expiry': 1229, 'paid_cents': 328, 'rate_per_hour': 150, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [None, 0]), ({'now': 1208, 'expiry': None, 'paid_cents': 533, 'rate_per_hour': 100, 'max_minutes': 60, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [None, 0]), ({'now': 1080, 'expiry': 1154, 'paid_cents': 297, 'rate_per_hour': 100, 'max_minutes': 240, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [None, 0]), ({'now': 480, 'expiry': None, 'paid_cents': 226, 'rate_per_hour': 100, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [600, 200])], [({'now': 1080, 'expiry': 1168, 'paid_cents': 356, 'rate_per_hour': 200, 'max_minutes': 60, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [None, 0]), ({'now': 1080, 'expiry': None, 'paid_cents': 584, 'rate_per_hour': 100, 'max_minutes': 60, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [None, 0]), ({'now': 1080, 'expiry': None, 'paid_cents': 350, 'rate_per_hour': 200, 'max_minutes': 60, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [None, 0]), ({'now': 600, 'expiry': 650, 'paid_cents': 400, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [720, 234]), ({'now': 480, 'expiry': None, 'paid_cents': 469, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [600, 400]), ({'now': 1040, 'expiry': None, 'paid_cents': 333, 'rate_per_hour': 150, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [1080, 100]), ({'now': 1087, 'expiry': 1093, 'paid_cents': 264, 'rate_per_hour': 100, 'max_minutes': 240, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [None, 0]), ({'now': 420, 'expiry': None, 'paid_cents': 200, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [540, 200])], [({'now': 1040, 'expiry': None, 'paid_cents': 333, 'rate_per_hour': 150, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [1080, 100]), ({'now': 63, 'expiry': 65, 'paid_cents': 478, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [600, 400]), ({'now': 1080, 'expiry': 1106, 'paid_cents': 493, 'rate_per_hour': 150, 'max_minutes': 240, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [None, 0]), ({'now': 480, 'expiry': 511, 'paid_cents': 308, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [600, 297]), ({'now': 1080, 'expiry': 1112, 'paid_cents': 319, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [None, 0]), ({'now': 1080, 'expiry': 1100, 'paid_cents': 100, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [None, 0]), ({'now': 600, 'expiry': 650, 'paid_cents': 400, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [720, 234]), ({'now': 655, 'expiry': None, 'paid_cents': 248, 'rate_per_hour': 200, 'max_minutes': 60, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [715, 200])]]\nfor i, (args, expected) in enumerate(fixtures[N-1]):\n    check('fee 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":"29e8cded130773b197182cea14283e35c7eb50c04d10f53e776fce767947de08","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(x):\n    inc = x['increment']\n    c = x['paid_cents'] - x['paid_cents'] % inc\n    now = x['now']\n    if now >= x['enf_end']:\n        return [None, 0]\n    base = max(now, x['enf_start'])\n    start = base if x['expiry'] is None else max(base, x['expiry'])\n    mins = c * 60 // x['rate_per_hour']\n    end = min(start + mins, base + x['max_minutes'], x['enf_end'])\n    used = max(0, end - start)\n    cost = min(c, -(-used * x['rate_per_hour'] // 60))\n    return [max(end, start), cost]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[({'now': 1080, 'expiry': 1078, 'paid_cents': 85, 'rate_per_hour': 100, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [None, 0]), ({'now': 1080, 'expiry': None, 'paid_cents': 480, 'rate_per_hour': 100, 'max_minutes': 240, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [None, 0]), ({'now': 600, 'expiry': 650, 'paid_cents': 400, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [720, 234]), ({'now': 1040, 'expiry': None, 'paid_cents': 333, 'rate_per_hour': 150, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [1080, 100]), ({'now': 1350, 'expiry': 1335, 'paid_cents': 5, 'rate_per_hour': 250, 'max_minutes': 60, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [None, 0]), ({'now': 1080, 'expiry': 1071, 'paid_cents': 491, 'rate_per_hour': 250, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [None, 0]), ({'now': 420, 'expiry': None, 'paid_cents': 200, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [540, 200]), ({'now': 1243, 'expiry': 1214, 'paid_cents': 292, 'rate_per_hour': 200, 'max_minutes': 60, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [None, 0])], [({'now': 1080, 'expiry': 1152, 'paid_cents': 523, 'rate_per_hour': 150, 'max_minutes': 60, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [None, 0]), ({'now': 420, 'expiry': None, 'paid_cents': 200, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [540, 200]), ({'now': 233, 'expiry': 231, 'paid_cents': 298, 'rate_per_hour': 100, 'max_minutes': 60, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [540, 100]), ({'now': 600, 'expiry': 650, 'paid_cents': 400, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [720, 234]), ({'now': 1080, 'expiry': 1025, 'paid_cents': 393, 'rate_per_hour': 100, 'max_minutes': 240, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [None, 0]), ({'now': 655, 'expiry': None, 'paid_cents': 200, 'rate_per_hour': 150, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [735, 200]), ({'now': 1069, 'expiry': 1154, 'paid_cents': 524, 'rate_per_hour': 150, 'max_minutes': 60, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [1154, 0]), ({'now': 1080, 'expiry': 1100, 'paid_cents': 100, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [None, 0])], [({'now': 1080, 'expiry': 1100, 'paid_cents': 100, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [None, 0]), ({'now': 1040, 'expiry': None, 'paid_cents': 333, 'rate_per_hour': 150, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [1080, 100]), ({'now': 600, 'expiry': 650, 'paid_cents': 400, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [720, 234]), ({'now': 1080, 'expiry': None, 'paid_cents': 109, 'rate_per_hour': 100, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [None, 0]), ({'now': 1221, 'expiry': 1229, 'paid_cents': 328, 'rate_per_hour': 150, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [None, 0]), ({'now': 1208, 'expiry': None, 'paid_cents': 533, 'rate_per_hour': 100, 'max_minutes': 60, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [None, 0]), ({'now': 1080, 'expiry': 1154, 'paid_cents': 297, 'rate_per_hour': 100, 'max_minutes': 240, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [None, 0]), ({'now': 480, 'expiry': None, 'paid_cents': 226, 'rate_per_hour': 100, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [600, 200])], [({'now': 1080, 'expiry': 1168, 'paid_cents': 356, 'rate_per_hour': 200, 'max_minutes': 60, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [None, 0]), ({'now': 1080, 'expiry': None, 'paid_cents': 584, 'rate_per_hour': 100, 'max_minutes': 60, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [None, 0]), ({'now': 1080, 'expiry': None, 'paid_cents': 350, 'rate_per_hour': 200, 'max_minutes': 60, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [None, 0]), ({'now': 600, 'expiry': 650, 'paid_cents': 400, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [720, 234]), ({'now': 480, 'expiry': None, 'paid_cents': 469, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [600, 400]), ({'now': 1040, 'expiry': None, 'paid_cents': 333, 'rate_per_hour': 150, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [1080, 100]), ({'now': 1087, 'expiry': 1093, 'paid_cents': 264, 'rate_per_hour': 100, 'max_minutes': 240, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [None, 0]), ({'now': 420, 'expiry': None, 'paid_cents': 200, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [540, 200])], [({'now': 1040, 'expiry': None, 'paid_cents': 333, 'rate_per_hour': 150, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [1080, 100]), ({'now': 63, 'expiry': 65, 'paid_cents': 478, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [600, 400]), ({'now': 1080, 'expiry': 1106, 'paid_cents': 493, 'rate_per_hour': 150, 'max_minutes': 240, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [None, 0]), ({'now': 480, 'expiry': 511, 'paid_cents': 308, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [600, 297]), ({'now': 1080, 'expiry': 1112, 'paid_cents': 319, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [None, 0]), ({'now': 1080, 'expiry': 1100, 'paid_cents': 100, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 25}, [None, 0]), ({'now': 600, 'expiry': 650, 'paid_cents': 400, 'rate_per_hour': 200, 'max_minutes': 120, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [720, 234]), ({'now': 655, 'expiry': None, 'paid_cents': 248, 'rate_per_hour': 200, 'max_minutes': 60, 'enf_start': 480, 'enf_end': 1080, 'increment': 5}, [715, 200])]]\nfor i, (args, expected) in enumerate(fixtures[N-1]):\n    check('fee 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-toll_and_parking_fee_computation-meter-purchase-after-hours","generated_at":"2026-09-29T14:48:02.523658+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"Fee engines bill customers in integer cents; a wrong boundary, rounding stage or cap scope silently over- or under-charges.","repair":"Restore the after-hours rejection rule so that the step reads `if now >= x['enf_end']:`.","root_cause":"At the enforcement end minute the meter still returns an expiry instead of rejecting payment.","sha256":"fc738f18d2966523441e48ea5ae7a71010157afdb011e5460ef9c6ef0866436a","title":"Street meter time purchase: a purchase at exactly enforcement end is processed · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":38.528,"exit_code":1,"observations":[{"actual":[1080,0],"check":"fee oracle 0","expected":[null,0],"passed":false},{"actual":[null,0],"check":"fee oracle 1","expected":[null,0],"passed":true},{"actual":[720,234],"check":"fee oracle 2","expected":[720,234],"passed":true},{"actual":[1080,100],"check":"fee oracle 3","expected":[1080,100],"passed":true},{"actual":[1350,0],"check":"fee oracle 4","expected":[null,0],"passed":false},{"actual":[1080,0],"check":"fee oracle 5","expected":[null,0],"passed":false},{"actual":[540,200],"check":"fee oracle 6","expected":[540,200],"passed":true},{"actual":[1243,0],"check":"fee oracle 7","expected":[null,0],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fee oracle 0\", \"actual\": [1080, 0], \"expected\": [null, 0], \"passed\": false}, {\"check\": \"fee oracle 1\", \"actual\": [null, 0], \"expected\": [null, 0], \"passed\": true}, {\"check\": \"fee oracle 2\", \"actual\": [720, 234], \"expected\": [720, 234], \"passed\": true}, {\"check\": \"fee oracle 3\", \"actual\": [1080, 100], \"expected\": [1080, 100], \"passed\": true}, {\"check\": \"fee oracle 4\", \"actual\": [1350, 0], \"expected\": [null, 0], \"passed\": false}, {\"check\": \"fee oracle 5\", \"actual\": [1080, 0], \"expected\": [null, 0], \"passed\": false}, {\"check\": \"fee oracle 6\", \"actual\": [540, 200], \"expected\": [540, 200], \"passed\": true}, {\"check\": \"fee oracle 7\", \"actual\": [1243, 0], \"expected\": [null, 0], \"passed\": false}], \"passed\": false}\n"},"broken":{"elapsed_ms":39.885,"exit_code":1,"observations":[{"actual":[1080,0],"check":"fee oracle 0","expected":[null,0],"passed":false},{"actual":[1080,0],"check":"fee oracle 1","expected":[null,0],"passed":false},{"actual":[720,234],"check":"fee oracle 2","expected":[720,234],"passed":true},{"actual":[1080,100],"check":"fee oracle 3","expected":[1080,100],"passed":true},{"actual":[null,0],"check":"fee oracle 4","expected":[null,0],"passed":true},{"actual":[1080,0],"check":"fee oracle 5","expected":[null,0],"passed":false},{"actual":[540,200],"check":"fee oracle 6","expected":[540,200],"passed":true},{"actual":[null,0],"check":"fee oracle 7","expected":[null,0],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fee oracle 0\", \"actual\": [1080, 0], \"expected\": [null, 0], \"passed\": false}, {\"check\": \"fee oracle 1\", \"actual\": [1080, 0], \"expected\": [null, 0], \"passed\": false}, {\"check\": \"fee oracle 2\", \"actual\": [720, 234], \"expected\": [720, 234], \"passed\": true}, {\"check\": \"fee oracle 3\", \"actual\": [1080, 100], \"expected\": [1080, 100], \"passed\": true}, {\"check\": \"fee oracle 4\", \"actual\": [null, 0], \"expected\": [null, 0], \"passed\": true}, {\"check\": \"fee oracle 5\", \"actual\": [1080, 0], \"expected\": [null, 0], \"passed\": false}, {\"check\": \"fee oracle 6\", \"actual\": [540, 200], \"expected\": [540, 200], \"passed\": true}, {\"check\": \"fee oracle 7\", \"actual\": [null, 0], \"expected\": [null, 0], \"passed\": true}], \"passed\": false}\n"},"fixed":{"elapsed_ms":39.272,"exit_code":0,"observations":[{"actual":[null,0],"check":"fee oracle 0","expected":[null,0],"passed":true},{"actual":[null,0],"check":"fee oracle 1","expected":[null,0],"passed":true},{"actual":[720,234],"check":"fee oracle 2","expected":[720,234],"passed":true},{"actual":[1080,100],"check":"fee oracle 3","expected":[1080,100],"passed":true},{"actual":[null,0],"check":"fee oracle 4","expected":[null,0],"passed":true},{"actual":[null,0],"check":"fee oracle 5","expected":[null,0],"passed":true},{"actual":[540,200],"check":"fee oracle 6","expected":[540,200],"passed":true},{"actual":[null,0],"check":"fee oracle 7","expected":[null,0],"passed":true}],"passed":true,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fee oracle 0\", \"actual\": [null, 0], \"expected\": [null, 0], \"passed\": true}, {\"check\": \"fee oracle 1\", \"actual\": [null, 0], \"expected\": [null, 0], \"passed\": true}, {\"check\": \"fee oracle 2\", \"actual\": [720, 234], \"expected\": [720, 234], \"passed\": true}, {\"check\": \"fee oracle 3\", \"actual\": [1080, 100], \"expected\": [1080, 100], \"passed\": true}, {\"check\": \"fee oracle 4\", \"actual\": [null, 0], \"expected\": [null, 0], \"passed\": true}, {\"check\": \"fee oracle 5\", \"actual\": [null, 0], \"expected\": [null, 0], \"passed\": true}, {\"check\": \"fee oracle 6\", \"actual\": [540, 200], \"expected\": [540, 200], \"passed\": true}, {\"check\": \"fee oracle 7\", \"actual\": [null, 0], \"expected\": [null, 0], \"passed\": true}], \"passed\": true}\n"}},"verified":true,"visibility":"public"}