{"abstract":"Shipments on the effective date of a new card are rated with the previous card.","category":"Shipping rate zone lookup","checks":8,"contract":"cards [[card_id, effective_from, expires or None, version]] with dates \"Y-M-D\" that may lack zero padding. A card applies when effective_from <= ship date < expires. Choose the latest effective_from, then highest version, then smallest card_id. None -> \"NO_CARD\".","evaluation_group":"w2-shipping-zone-card-dating","failed_approach":"Comparing only year and month starts cards on the first of their month.","family":"w2-shipping-zone-card-dating-effective-inclusive","id":"FA-95496","implementations":{"attempt":{"sha256":"4f8f0952db45c81d64aed11f3ffd5ebc5265330da66ac29aef90a396e0b2bcc7","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(cards, ship_date):\n    def d(s):\n        return tuple(int(x) for x in s.split('-'))\n    ship = d(ship_date)\n    best = None\n    for cid, frm, exp, ver in cards:\n        if d(frm)[:2] > ship[:2]:\n            continue\n        if exp is not None and ship >= d(exp):\n            continue\n        key = (d(frm), ver)\n        if best is None or key > best[0] or (key == best[0] and cid < best[1]):\n            best = (key, cid)\n    return best[1] if best else 'NO_CARD'\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[['effective same day', [[['A', '2026-3-1', None, 1], ['B', '2025-1-1', None, 1]], '2026-3-1'], 'A'], ['generated mix 21', [[['R0', '2026-2-1', '2026-10-1', 1], ['R1', '2026-10-1', '2026-10-1', 2], ['R2', '2026-2-1', '2026-11-1', 1], ['R3', '2026-01-15', '2026-10-1', 2], ['R4', '2026-1-5', '2026-2-1', 1]], '2026-1-5'], 'R4'], ['unpadded month', [[['A', '2026-2-1', None, 1], ['B', '2026-10-1', None, 1]], '2026-10-15'], 'B'], ['version tie', [[['A', '2026-1-1', None, 1], ['B', '2026-1-1', None, 2]], '2026-5-1'], 'B'], ['future only', [[['A', '2027-1-1', None, 1]], '2026-5-1'], 'NO_CARD'], ['expiry exclusive', [[['A', '2026-1-1', '2026-3-1', 1], ['B', '2025-1-1', None, 1]], '2026-3-1'], 'B'], ['id tie', [[['Z', '2026-1-1', None, 2], ['M', '2026-1-1', None, 2]], '2026-5-1'], 'M'], ['generated mix 8', [[['R0', '2026-10-1', '2026-10-1', 1], ['R1', '2026-1-5', None, 3], ['R2', '2026-10-1', '2026-11-1', 3], ['R3', '2026-2-1', None, 3], ['R4', '2026-10-1', None, 3]], '2025-12-31'], 'NO_CARD']], [['generated mix 28', [[['R0', '2026-2-1', '2026-10-1', 1]], '2026-2-1'], 'R0'], ['generated mix 12', [[['R0', '2026-01-15', '2026-2-1', 3], ['R1', '2026-11-1', '2026-11-1', 1]], '2026-1-5'], 'NO_CARD'], ['version tie', [[['A', '2026-1-1', None, 1], ['B', '2026-1-1', None, 2]], '2026-5-1'], 'B'], ['future only', [[['A', '2027-1-1', None, 1]], '2026-5-1'], 'NO_CARD'], ['expiry exclusive', [[['A', '2026-1-1', '2026-3-1', 1], ['B', '2025-1-1', None, 1]], '2026-3-1'], 'B'], ['generated mix 9', [[['R0', '2026-01-15', '2026-2-1', 1], ['R1', '2025-12-31', '2026-2-1', 3], ['R2', '2026-9-30', '2026-10-1', 3], ['R3', '2026-10-1', '2026-2-1', 1]], '2025-12-31'], 'R1'], ['generated mix 18', [[['R0', '2026-10-1', None, 3], ['R1', '2026-10-1', None, 2], ['R2', '2026-10-1', '2026-2-1', 1], ['R3', '2026-01-15', '2026-2-1', 2], ['R4', '2025-12-31', '2026-11-1', 3]], '2026-10-15'], 'R0'], ['generated mix 26', [[['R0', '2026-2-1', None, 2], ['R1', '2025-12-31', '2026-11-1', 3], ['R2', '2025-12-31', None, 2], ['R3', '2026-9-30', None, 2]], '2026-3-15'], 'R0']], [['generated mix 9', [[['R0', '2026-01-15', '2026-2-1', 1], ['R1', '2025-12-31', '2026-2-1', 3], ['R2', '2026-9-30', '2026-10-1', 3], ['R3', '2026-10-1', '2026-2-1', 1]], '2025-12-31'], 'R1'], ['generated mix 21', [[['R0', '2026-2-1', '2026-10-1', 1], ['R1', '2026-10-1', '2026-10-1', 2], ['R2', '2026-2-1', '2026-11-1', 1], ['R3', '2026-01-15', '2026-10-1', 2], ['R4', '2026-1-5', '2026-2-1', 1]], '2026-1-5'], 'R4'], ['unpadded month', [[['A', '2026-2-1', None, 1], ['B', '2026-10-1', None, 1]], '2026-10-15'], 'B'], ['effective same day', [[['A', '2026-3-1', None, 1], ['B', '2025-1-1', None, 1]], '2026-3-1'], 'A'], ['id tie', [[['Z', '2026-1-1', None, 2], ['M', '2026-1-1', None, 2]], '2026-5-1'], 'M'], ['generated mix 22', [[['R0', '2026-2-1', '2026-2-1', 2], ['R1', '2026-9-30', '2026-2-1', 1], ['R2', '2026-9-30', '2026-11-1', 2], ['R3', '2026-2-1', '2026-2-1', 1], ['R4', '2026-2-1', '2026-10-1', 3]], '2026-3-15'], 'R4'], ['generated mix 30', [[['R0', '2026-1-5', '2026-2-1', 1], ['R1', '2026-11-1', '2026-2-1', 1], ['R2', '2025-12-31', '2026-2-1', 2], ['R3', '2026-10-1', '2026-11-1', 3]], '2026-01-15'], 'R0'], ['generated mix 38', [[['R0', '2026-10-1', '2026-2-1', 2], ['R1', '2026-01-15', '2026-10-1', 1], ['R2', '2026-1-5', None, 1], ['R3', '2026-1-5', '2026-11-1', 3]], '2026-10-15'], 'R3']], [['generated mix 47', [[['R0', '2026-2-1', '2026-11-1', 3], ['R1', '2025-12-31', '2026-10-1', 1], ['R2', '2026-10-1', '2026-11-1', 1], ['R3', '2026-10-1', '2026-10-1', 2]], '2026-2-1'], 'R0'], ['generated mix 12', [[['R0', '2026-01-15', '2026-2-1', 3], ['R1', '2026-11-1', '2026-11-1', 1]], '2026-1-5'], 'NO_CARD'], ['version tie', [[['A', '2026-1-1', None, 1], ['B', '2026-1-1', None, 2]], '2026-5-1'], 'B'], ['future only', [[['A', '2027-1-1', None, 1]], '2026-5-1'], 'NO_CARD'], ['expiry exclusive', [[['A', '2026-1-1', '2026-3-1', 1], ['B', '2025-1-1', None, 1]], '2026-3-1'], 'B'], ['generated mix 32', [[['R0', '2026-2-1', None, 1]], '2026-10-1'], 'R0'], ['generated mix 40', [[['R0', '2026-10-1', '2026-2-1', 1], ['R1', '2026-11-1', '2026-2-1', 2], ['R2', '2026-9-30', None, 2], ['R3', '2026-1-5', '2026-2-1', 1]], '2025-12-31'], 'NO_CARD'], ['generated mix 49', [[['R0', '2026-10-1', '2026-10-1', 1], ['R1', '2026-1-5', '2026-2-1', 3], ['R2', '2026-2-1', None, 2], ['R3', '2026-9-30', None, 1], ['R4', '2026-11-1', '2026-11-1', 3]], '2026-10-1'], 'R3']], [['generated mix 21', [[['R0', '2026-2-1', '2026-10-1', 1], ['R1', '2026-10-1', '2026-10-1', 2], ['R2', '2026-2-1', '2026-11-1', 1], ['R3', '2026-01-15', '2026-10-1', 2], ['R4', '2026-1-5', '2026-2-1', 1]], '2026-1-5'], 'R4'], ['unpadded month', [[['A', '2026-2-1', None, 1], ['B', '2026-10-1', None, 1]], '2026-10-15'], 'B'], ['effective same day', [[['A', '2026-3-1', None, 1], ['B', '2025-1-1', None, 1]], '2026-3-1'], 'A'], ['id tie', [[['Z', '2026-1-1', None, 2], ['M', '2026-1-1', None, 2]], '2026-5-1'], 'M'], ['generated mix 43', [[['R0', '2026-11-1', '2026-10-1', 2], ['R1', '2026-9-30', None, 3], ['R2', '2026-2-1', '2026-11-1', 3], ['R3', '2025-12-31', '2026-2-1', 2], ['R4', '2026-1-5', '2026-2-1', 1]], '2026-3-15'], 'R2'], ['generated mix 51', [[['R0', '2026-9-30', '2026-10-1', 2], ['R1', '2026-1-5', None, 3], ['R2', '2026-01-15', None, 2], ['R3', '2026-2-1', '2026-11-1', 2]], '2026-10-1'], 'R3'], ['generated mix 59', [[['R0', '2025-12-31', None, 2]], '2026-11-1'], 'R0'], ['generated mix 67', [[['R0', '2026-11-1', None, 3], ['R1', '2026-1-5', '2026-2-1', 2]], '2026-2-1'], 'NO_CARD']]]\nfor label, args, expected in fixtures[N-1]:\n    check(label, 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":"ffac30b2854fbfe71128b7ec9c4a48507421dcb989d7c3121a397bfd5748d9c4","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(cards, ship_date):\n    def d(s):\n        return tuple(int(x) for x in s.split('-'))\n    ship = d(ship_date)\n    best = None\n    for cid, frm, exp, ver in cards:\n        if d(frm) >= ship:\n            continue\n        if exp is not None and ship >= d(exp):\n            continue\n        key = (d(frm), ver)\n        if best is None or key > best[0] or (key == best[0] and cid < best[1]):\n            best = (key, cid)\n    return best[1] if best else 'NO_CARD'\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[['effective same day', [[['A', '2026-3-1', None, 1], ['B', '2025-1-1', None, 1]], '2026-3-1'], 'A'], ['generated mix 21', [[['R0', '2026-2-1', '2026-10-1', 1], ['R1', '2026-10-1', '2026-10-1', 2], ['R2', '2026-2-1', '2026-11-1', 1], ['R3', '2026-01-15', '2026-10-1', 2], ['R4', '2026-1-5', '2026-2-1', 1]], '2026-1-5'], 'R4'], ['unpadded month', [[['A', '2026-2-1', None, 1], ['B', '2026-10-1', None, 1]], '2026-10-15'], 'B'], ['version tie', [[['A', '2026-1-1', None, 1], ['B', '2026-1-1', None, 2]], '2026-5-1'], 'B'], ['future only', [[['A', '2027-1-1', None, 1]], '2026-5-1'], 'NO_CARD'], ['expiry exclusive', [[['A', '2026-1-1', '2026-3-1', 1], ['B', '2025-1-1', None, 1]], '2026-3-1'], 'B'], ['id tie', [[['Z', '2026-1-1', None, 2], ['M', '2026-1-1', None, 2]], '2026-5-1'], 'M'], ['generated mix 8', [[['R0', '2026-10-1', '2026-10-1', 1], ['R1', '2026-1-5', None, 3], ['R2', '2026-10-1', '2026-11-1', 3], ['R3', '2026-2-1', None, 3], ['R4', '2026-10-1', None, 3]], '2025-12-31'], 'NO_CARD']], [['generated mix 28', [[['R0', '2026-2-1', '2026-10-1', 1]], '2026-2-1'], 'R0'], ['generated mix 12', [[['R0', '2026-01-15', '2026-2-1', 3], ['R1', '2026-11-1', '2026-11-1', 1]], '2026-1-5'], 'NO_CARD'], ['version tie', [[['A', '2026-1-1', None, 1], ['B', '2026-1-1', None, 2]], '2026-5-1'], 'B'], ['future only', [[['A', '2027-1-1', None, 1]], '2026-5-1'], 'NO_CARD'], ['expiry exclusive', [[['A', '2026-1-1', '2026-3-1', 1], ['B', '2025-1-1', None, 1]], '2026-3-1'], 'B'], ['generated mix 9', [[['R0', '2026-01-15', '2026-2-1', 1], ['R1', '2025-12-31', '2026-2-1', 3], ['R2', '2026-9-30', '2026-10-1', 3], ['R3', '2026-10-1', '2026-2-1', 1]], '2025-12-31'], 'R1'], ['generated mix 18', [[['R0', '2026-10-1', None, 3], ['R1', '2026-10-1', None, 2], ['R2', '2026-10-1', '2026-2-1', 1], ['R3', '2026-01-15', '2026-2-1', 2], ['R4', '2025-12-31', '2026-11-1', 3]], '2026-10-15'], 'R0'], ['generated mix 26', [[['R0', '2026-2-1', None, 2], ['R1', '2025-12-31', '2026-11-1', 3], ['R2', '2025-12-31', None, 2], ['R3', '2026-9-30', None, 2]], '2026-3-15'], 'R0']], [['generated mix 9', [[['R0', '2026-01-15', '2026-2-1', 1], ['R1', '2025-12-31', '2026-2-1', 3], ['R2', '2026-9-30', '2026-10-1', 3], ['R3', '2026-10-1', '2026-2-1', 1]], '2025-12-31'], 'R1'], ['generated mix 21', [[['R0', '2026-2-1', '2026-10-1', 1], ['R1', '2026-10-1', '2026-10-1', 2], ['R2', '2026-2-1', '2026-11-1', 1], ['R3', '2026-01-15', '2026-10-1', 2], ['R4', '2026-1-5', '2026-2-1', 1]], '2026-1-5'], 'R4'], ['unpadded month', [[['A', '2026-2-1', None, 1], ['B', '2026-10-1', None, 1]], '2026-10-15'], 'B'], ['effective same day', [[['A', '2026-3-1', None, 1], ['B', '2025-1-1', None, 1]], '2026-3-1'], 'A'], ['id tie', [[['Z', '2026-1-1', None, 2], ['M', '2026-1-1', None, 2]], '2026-5-1'], 'M'], ['generated mix 22', [[['R0', '2026-2-1', '2026-2-1', 2], ['R1', '2026-9-30', '2026-2-1', 1], ['R2', '2026-9-30', '2026-11-1', 2], ['R3', '2026-2-1', '2026-2-1', 1], ['R4', '2026-2-1', '2026-10-1', 3]], '2026-3-15'], 'R4'], ['generated mix 30', [[['R0', '2026-1-5', '2026-2-1', 1], ['R1', '2026-11-1', '2026-2-1', 1], ['R2', '2025-12-31', '2026-2-1', 2], ['R3', '2026-10-1', '2026-11-1', 3]], '2026-01-15'], 'R0'], ['generated mix 38', [[['R0', '2026-10-1', '2026-2-1', 2], ['R1', '2026-01-15', '2026-10-1', 1], ['R2', '2026-1-5', None, 1], ['R3', '2026-1-5', '2026-11-1', 3]], '2026-10-15'], 'R3']], [['generated mix 47', [[['R0', '2026-2-1', '2026-11-1', 3], ['R1', '2025-12-31', '2026-10-1', 1], ['R2', '2026-10-1', '2026-11-1', 1], ['R3', '2026-10-1', '2026-10-1', 2]], '2026-2-1'], 'R0'], ['generated mix 12', [[['R0', '2026-01-15', '2026-2-1', 3], ['R1', '2026-11-1', '2026-11-1', 1]], '2026-1-5'], 'NO_CARD'], ['version tie', [[['A', '2026-1-1', None, 1], ['B', '2026-1-1', None, 2]], '2026-5-1'], 'B'], ['future only', [[['A', '2027-1-1', None, 1]], '2026-5-1'], 'NO_CARD'], ['expiry exclusive', [[['A', '2026-1-1', '2026-3-1', 1], ['B', '2025-1-1', None, 1]], '2026-3-1'], 'B'], ['generated mix 32', [[['R0', '2026-2-1', None, 1]], '2026-10-1'], 'R0'], ['generated mix 40', [[['R0', '2026-10-1', '2026-2-1', 1], ['R1', '2026-11-1', '2026-2-1', 2], ['R2', '2026-9-30', None, 2], ['R3', '2026-1-5', '2026-2-1', 1]], '2025-12-31'], 'NO_CARD'], ['generated mix 49', [[['R0', '2026-10-1', '2026-10-1', 1], ['R1', '2026-1-5', '2026-2-1', 3], ['R2', '2026-2-1', None, 2], ['R3', '2026-9-30', None, 1], ['R4', '2026-11-1', '2026-11-1', 3]], '2026-10-1'], 'R3']], [['generated mix 21', [[['R0', '2026-2-1', '2026-10-1', 1], ['R1', '2026-10-1', '2026-10-1', 2], ['R2', '2026-2-1', '2026-11-1', 1], ['R3', '2026-01-15', '2026-10-1', 2], ['R4', '2026-1-5', '2026-2-1', 1]], '2026-1-5'], 'R4'], ['unpadded month', [[['A', '2026-2-1', None, 1], ['B', '2026-10-1', None, 1]], '2026-10-15'], 'B'], ['effective same day', [[['A', '2026-3-1', None, 1], ['B', '2025-1-1', None, 1]], '2026-3-1'], 'A'], ['id tie', [[['Z', '2026-1-1', None, 2], ['M', '2026-1-1', None, 2]], '2026-5-1'], 'M'], ['generated mix 43', [[['R0', '2026-11-1', '2026-10-1', 2], ['R1', '2026-9-30', None, 3], ['R2', '2026-2-1', '2026-11-1', 3], ['R3', '2025-12-31', '2026-2-1', 2], ['R4', '2026-1-5', '2026-2-1', 1]], '2026-3-15'], 'R2'], ['generated mix 51', [[['R0', '2026-9-30', '2026-10-1', 2], ['R1', '2026-1-5', None, 3], ['R2', '2026-01-15', None, 2], ['R3', '2026-2-1', '2026-11-1', 2]], '2026-10-1'], 'R3'], ['generated mix 59', [[['R0', '2025-12-31', None, 2]], '2026-11-1'], 'R0'], ['generated mix 67', [[['R0', '2026-11-1', None, 3], ['R1', '2026-1-5', '2026-2-1', 2]], '2026-2-1'], 'NO_CARD']]]\nfor label, args, expected in fixtures[N-1]:\n    check(label, 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":"088c139229bb1415dfc8ee4f38bd92df7567aa73b7c02bd0540b5fd8e46cceb9","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(cards, ship_date):\n    def d(s):\n        return tuple(int(x) for x in s.split('-'))\n    ship = d(ship_date)\n    best = None\n    for cid, frm, exp, ver in cards:\n        if d(frm) > ship:\n            continue\n        if exp is not None and ship >= d(exp):\n            continue\n        key = (d(frm), ver)\n        if best is None or key > best[0] or (key == best[0] and cid < best[1]):\n            best = (key, cid)\n    return best[1] if best else 'NO_CARD'\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[['effective same day', [[['A', '2026-3-1', None, 1], ['B', '2025-1-1', None, 1]], '2026-3-1'], 'A'], ['generated mix 21', [[['R0', '2026-2-1', '2026-10-1', 1], ['R1', '2026-10-1', '2026-10-1', 2], ['R2', '2026-2-1', '2026-11-1', 1], ['R3', '2026-01-15', '2026-10-1', 2], ['R4', '2026-1-5', '2026-2-1', 1]], '2026-1-5'], 'R4'], ['unpadded month', [[['A', '2026-2-1', None, 1], ['B', '2026-10-1', None, 1]], '2026-10-15'], 'B'], ['version tie', [[['A', '2026-1-1', None, 1], ['B', '2026-1-1', None, 2]], '2026-5-1'], 'B'], ['future only', [[['A', '2027-1-1', None, 1]], '2026-5-1'], 'NO_CARD'], ['expiry exclusive', [[['A', '2026-1-1', '2026-3-1', 1], ['B', '2025-1-1', None, 1]], '2026-3-1'], 'B'], ['id tie', [[['Z', '2026-1-1', None, 2], ['M', '2026-1-1', None, 2]], '2026-5-1'], 'M'], ['generated mix 8', [[['R0', '2026-10-1', '2026-10-1', 1], ['R1', '2026-1-5', None, 3], ['R2', '2026-10-1', '2026-11-1', 3], ['R3', '2026-2-1', None, 3], ['R4', '2026-10-1', None, 3]], '2025-12-31'], 'NO_CARD']], [['generated mix 28', [[['R0', '2026-2-1', '2026-10-1', 1]], '2026-2-1'], 'R0'], ['generated mix 12', [[['R0', '2026-01-15', '2026-2-1', 3], ['R1', '2026-11-1', '2026-11-1', 1]], '2026-1-5'], 'NO_CARD'], ['version tie', [[['A', '2026-1-1', None, 1], ['B', '2026-1-1', None, 2]], '2026-5-1'], 'B'], ['future only', [[['A', '2027-1-1', None, 1]], '2026-5-1'], 'NO_CARD'], ['expiry exclusive', [[['A', '2026-1-1', '2026-3-1', 1], ['B', '2025-1-1', None, 1]], '2026-3-1'], 'B'], ['generated mix 9', [[['R0', '2026-01-15', '2026-2-1', 1], ['R1', '2025-12-31', '2026-2-1', 3], ['R2', '2026-9-30', '2026-10-1', 3], ['R3', '2026-10-1', '2026-2-1', 1]], '2025-12-31'], 'R1'], ['generated mix 18', [[['R0', '2026-10-1', None, 3], ['R1', '2026-10-1', None, 2], ['R2', '2026-10-1', '2026-2-1', 1], ['R3', '2026-01-15', '2026-2-1', 2], ['R4', '2025-12-31', '2026-11-1', 3]], '2026-10-15'], 'R0'], ['generated mix 26', [[['R0', '2026-2-1', None, 2], ['R1', '2025-12-31', '2026-11-1', 3], ['R2', '2025-12-31', None, 2], ['R3', '2026-9-30', None, 2]], '2026-3-15'], 'R0']], [['generated mix 9', [[['R0', '2026-01-15', '2026-2-1', 1], ['R1', '2025-12-31', '2026-2-1', 3], ['R2', '2026-9-30', '2026-10-1', 3], ['R3', '2026-10-1', '2026-2-1', 1]], '2025-12-31'], 'R1'], ['generated mix 21', [[['R0', '2026-2-1', '2026-10-1', 1], ['R1', '2026-10-1', '2026-10-1', 2], ['R2', '2026-2-1', '2026-11-1', 1], ['R3', '2026-01-15', '2026-10-1', 2], ['R4', '2026-1-5', '2026-2-1', 1]], '2026-1-5'], 'R4'], ['unpadded month', [[['A', '2026-2-1', None, 1], ['B', '2026-10-1', None, 1]], '2026-10-15'], 'B'], ['effective same day', [[['A', '2026-3-1', None, 1], ['B', '2025-1-1', None, 1]], '2026-3-1'], 'A'], ['id tie', [[['Z', '2026-1-1', None, 2], ['M', '2026-1-1', None, 2]], '2026-5-1'], 'M'], ['generated mix 22', [[['R0', '2026-2-1', '2026-2-1', 2], ['R1', '2026-9-30', '2026-2-1', 1], ['R2', '2026-9-30', '2026-11-1', 2], ['R3', '2026-2-1', '2026-2-1', 1], ['R4', '2026-2-1', '2026-10-1', 3]], '2026-3-15'], 'R4'], ['generated mix 30', [[['R0', '2026-1-5', '2026-2-1', 1], ['R1', '2026-11-1', '2026-2-1', 1], ['R2', '2025-12-31', '2026-2-1', 2], ['R3', '2026-10-1', '2026-11-1', 3]], '2026-01-15'], 'R0'], ['generated mix 38', [[['R0', '2026-10-1', '2026-2-1', 2], ['R1', '2026-01-15', '2026-10-1', 1], ['R2', '2026-1-5', None, 1], ['R3', '2026-1-5', '2026-11-1', 3]], '2026-10-15'], 'R3']], [['generated mix 47', [[['R0', '2026-2-1', '2026-11-1', 3], ['R1', '2025-12-31', '2026-10-1', 1], ['R2', '2026-10-1', '2026-11-1', 1], ['R3', '2026-10-1', '2026-10-1', 2]], '2026-2-1'], 'R0'], ['generated mix 12', [[['R0', '2026-01-15', '2026-2-1', 3], ['R1', '2026-11-1', '2026-11-1', 1]], '2026-1-5'], 'NO_CARD'], ['version tie', [[['A', '2026-1-1', None, 1], ['B', '2026-1-1', None, 2]], '2026-5-1'], 'B'], ['future only', [[['A', '2027-1-1', None, 1]], '2026-5-1'], 'NO_CARD'], ['expiry exclusive', [[['A', '2026-1-1', '2026-3-1', 1], ['B', '2025-1-1', None, 1]], '2026-3-1'], 'B'], ['generated mix 32', [[['R0', '2026-2-1', None, 1]], '2026-10-1'], 'R0'], ['generated mix 40', [[['R0', '2026-10-1', '2026-2-1', 1], ['R1', '2026-11-1', '2026-2-1', 2], ['R2', '2026-9-30', None, 2], ['R3', '2026-1-5', '2026-2-1', 1]], '2025-12-31'], 'NO_CARD'], ['generated mix 49', [[['R0', '2026-10-1', '2026-10-1', 1], ['R1', '2026-1-5', '2026-2-1', 3], ['R2', '2026-2-1', None, 2], ['R3', '2026-9-30', None, 1], ['R4', '2026-11-1', '2026-11-1', 3]], '2026-10-1'], 'R3']], [['generated mix 21', [[['R0', '2026-2-1', '2026-10-1', 1], ['R1', '2026-10-1', '2026-10-1', 2], ['R2', '2026-2-1', '2026-11-1', 1], ['R3', '2026-01-15', '2026-10-1', 2], ['R4', '2026-1-5', '2026-2-1', 1]], '2026-1-5'], 'R4'], ['unpadded month', [[['A', '2026-2-1', None, 1], ['B', '2026-10-1', None, 1]], '2026-10-15'], 'B'], ['effective same day', [[['A', '2026-3-1', None, 1], ['B', '2025-1-1', None, 1]], '2026-3-1'], 'A'], ['id tie', [[['Z', '2026-1-1', None, 2], ['M', '2026-1-1', None, 2]], '2026-5-1'], 'M'], ['generated mix 43', [[['R0', '2026-11-1', '2026-10-1', 2], ['R1', '2026-9-30', None, 3], ['R2', '2026-2-1', '2026-11-1', 3], ['R3', '2025-12-31', '2026-2-1', 2], ['R4', '2026-1-5', '2026-2-1', 1]], '2026-3-15'], 'R2'], ['generated mix 51', [[['R0', '2026-9-30', '2026-10-1', 2], ['R1', '2026-1-5', None, 3], ['R2', '2026-01-15', None, 2], ['R3', '2026-2-1', '2026-11-1', 2]], '2026-10-1'], 'R3'], ['generated mix 59', [[['R0', '2025-12-31', None, 2]], '2026-11-1'], 'R0'], ['generated mix 67', [[['R0', '2026-11-1', None, 3], ['R1', '2026-1-5', '2026-2-1', 2]], '2026-2-1'], 'NO_CARD']]]\nfor label, args, expected in fixtures[N-1]:\n    check(label, 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":"Stipulated date format and selection policy. 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-shipping-zone-card-dating-effective-inclusive","generated_at":"2026-09-29T14:52:14.266556+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"Carriers publish dated rate cards; each shipment must use the card in force on its ship date.","repair":"A card applies from its effective date inclusive.","root_cause":"The effective-from comparison excludes the effective date.","sha256":"9a3dad6d902b625f82bcbad57ee7f147682ab167e0856bbe24bb4698b5570289","title":"Rate card: new card ignored on its first day · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":42.592,"exit_code":1,"observations":[{"actual":"A","check":"effective same day","expected":"A","passed":true},{"actual":"R3","check":"generated mix 21","expected":"R4","passed":false},{"actual":"B","check":"unpadded month","expected":"B","passed":true},{"actual":"B","check":"version tie","expected":"B","passed":true},{"actual":"NO_CARD","check":"future only","expected":"NO_CARD","passed":true},{"actual":"B","check":"expiry exclusive","expected":"B","passed":true},{"actual":"M","check":"id tie","expected":"M","passed":true},{"actual":"NO_CARD","check":"generated mix 8","expected":"NO_CARD","passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"effective same day\", \"actual\": \"A\", \"expected\": \"A\", \"passed\": true}, {\"check\": \"generated mix 21\", \"actual\": \"R3\", \"expected\": \"R4\", \"passed\": false}, {\"check\": \"unpadded month\", \"actual\": \"B\", \"expected\": \"B\", \"passed\": true}, {\"check\": \"version tie\", \"actual\": \"B\", \"expected\": \"B\", \"passed\": true}, {\"check\": \"future only\", \"actual\": \"NO_CARD\", \"expected\": \"NO_CARD\", \"passed\": true}, {\"check\": \"expiry exclusive\", \"actual\": \"B\", \"expected\": \"B\", \"passed\": true}, {\"check\": \"id tie\", \"actual\": \"M\", \"expected\": \"M\", \"passed\": true}, {\"check\": \"generated mix 8\", \"actual\": \"NO_CARD\", \"expected\": \"NO_CARD\", \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":40.233,"exit_code":1,"observations":[{"actual":"B","check":"effective same day","expected":"A","passed":false},{"actual":"NO_CARD","check":"generated mix 21","expected":"R4","passed":false},{"actual":"B","check":"unpadded month","expected":"B","passed":true},{"actual":"B","check":"version tie","expected":"B","passed":true},{"actual":"NO_CARD","check":"future only","expected":"NO_CARD","passed":true},{"actual":"B","check":"expiry exclusive","expected":"B","passed":true},{"actual":"M","check":"id tie","expected":"M","passed":true},{"actual":"NO_CARD","check":"generated mix 8","expected":"NO_CARD","passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"effective same day\", \"actual\": \"B\", \"expected\": \"A\", \"passed\": false}, {\"check\": \"generated mix 21\", \"actual\": \"NO_CARD\", \"expected\": \"R4\", \"passed\": false}, {\"check\": \"unpadded month\", \"actual\": \"B\", \"expected\": \"B\", \"passed\": true}, {\"check\": \"version tie\", \"actual\": \"B\", \"expected\": \"B\", \"passed\": true}, {\"check\": \"future only\", \"actual\": \"NO_CARD\", \"expected\": \"NO_CARD\", \"passed\": true}, {\"check\": \"expiry exclusive\", \"actual\": \"B\", \"expected\": \"B\", \"passed\": true}, {\"check\": \"id tie\", \"actual\": \"M\", \"expected\": \"M\", \"passed\": true}, {\"check\": \"generated mix 8\", \"actual\": \"NO_CARD\", \"expected\": \"NO_CARD\", \"passed\": true}], \"passed\": false}\n"},"fixed":{"elapsed_ms":42.704,"exit_code":0,"observations":[{"actual":"A","check":"effective same day","expected":"A","passed":true},{"actual":"R4","check":"generated mix 21","expected":"R4","passed":true},{"actual":"B","check":"unpadded month","expected":"B","passed":true},{"actual":"B","check":"version tie","expected":"B","passed":true},{"actual":"NO_CARD","check":"future only","expected":"NO_CARD","passed":true},{"actual":"B","check":"expiry exclusive","expected":"B","passed":true},{"actual":"M","check":"id tie","expected":"M","passed":true},{"actual":"NO_CARD","check":"generated mix 8","expected":"NO_CARD","passed":true}],"passed":true,"stderr":"","stdout":"{\"observations\": [{\"check\": \"effective same day\", \"actual\": \"A\", \"expected\": \"A\", \"passed\": true}, {\"check\": \"generated mix 21\", \"actual\": \"R4\", \"expected\": \"R4\", \"passed\": true}, {\"check\": \"unpadded month\", \"actual\": \"B\", \"expected\": \"B\", \"passed\": true}, {\"check\": \"version tie\", \"actual\": \"B\", \"expected\": \"B\", \"passed\": true}, {\"check\": \"future only\", \"actual\": \"NO_CARD\", \"expected\": \"NO_CARD\", \"passed\": true}, {\"check\": \"expiry exclusive\", \"actual\": \"B\", \"expected\": \"B\", \"passed\": true}, {\"check\": \"id tie\", \"actual\": \"M\", \"expected\": \"M\", \"passed\": true}, {\"check\": \"generated mix 8\", \"actual\": \"NO_CARD\", \"expected\": \"NO_CARD\", \"passed\": true}], \"passed\": true}\n"}},"verified":true,"visibility":"public"}