{"abstract":"Every alarm is announced one scan late.","category":"PLC ladder logic scan cycles","checks":8,"contract":"Digital alarm instruction evaluated per scan; scans is a list of [condition, ack, reset], min_scans >= 1. The alarm activates when the condition has been true for min_scans consecutive scans; activation clears the acknowledged flag. A non-latched alarm clears when the condition goes false; a latched alarm clears only on a reset while the condition is false. ack sets acknowledged. Return [in_alarm, acknowledged] per scan.","contract_signature":"min_scans, latched, scans","evaluation_group":"w2-plc-ladder-logic-scan-cycles-digital-alarm-block","failed_approach":"Comparing against min_scans - 1 activates one scan early.","family":"w2-plc-ladder-logic-scan-cycles-digital-alarm-block-duration-compare","id":"FA-92196","implementations":{"attempt":{"sha256":"37936ab78458eb9096104972fc6b3ab08bc035d632d4f68fc183630b7e56f3cc","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(min_scans, latched, scans):\n    in_alarm = False\n    acked = True\n    count = 0\n    out = []\n    for cond, ack, reset in scans:\n        count = count + 1 if cond else 0\n        if count >= min_scans - 1 and cond and not in_alarm:\n            in_alarm = True\n            acked = False\n        elif in_alarm and not cond and (not latched or reset):\n            in_alarm = False\n        if ack and not acked:\n            acked = True\n        out.append([in_alarm, acked])\n    return out\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[['regression: latched with ack and reset',\n   [2,\n    True,\n    [[True, False, False],\n     [True, False, False],\n     [False, False, False],\n     [False, True, False],\n     [False, False, True],\n     [True, False, False]]],\n   [[False, True], [True, False], [True, False], [True, True], [False, True], [False, True]]],\n  ['regression: chattering condition',\n   [3,\n    False,\n    [[True, False, False],\n     [True, False, False],\n     [False, False, False],\n     [True, False, False],\n     [True, False, False],\n     [True, False, False]]],\n   [[False, True], [False, True], [False, True], [False, True], [False, True], [True, False]]],\n  ['regression: realarm after ack',\n   [1, False, [[True, False, False], [True, True, False], [False, False, False], [True, False, False]]],\n   [[True, False], [True, True], [False, True], [True, False]]],\n  ['regression: reset while condition true',\n   [1, False, [[True, False, False], [True, False, True], [True, False, False]]],\n   [[True, False], [True, False], [True, False]]],\n  ['regression: ack on latched alarm',\n   [1, True, [[True, False, False], [False, True, False], [False, False, False], [False, False, True]]],\n   [[True, False], [True, True], [True, True], [False, True]]],\n  ['regression: scenario 1',\n   [1,\n    False,\n    [[True, False, False],\n     [False, False, False],\n     [True, False, False],\n     [False, False, False],\n     [True, True, False],\n     [True, False, False],\n     [True, False, False],\n     [False, False, False],\n     [False, False, False],\n     [True, False, False]]],\n   [[True, False],\n    [False, False],\n    [True, False],\n    [False, False],\n    [True, True],\n    [True, True],\n    [True, True],\n    [False, True],\n    [False, True],\n    [True, False]]],\n  ['regression: scenario 2',\n   [1,\n    True,\n    [[False, False, False],\n     [True, False, False],\n     [True, False, False],\n     [False, False, False],\n     [False, False, False],\n     [True, False, False],\n     [False, False, False],\n     [False, False, True],\n     [False, False, False],\n     [False, True, False],\n     [True, False, False],\n     [False, False, False]]],\n   [[False, True],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [False, False],\n    [False, False],\n    [False, True],\n    [True, False],\n    [True, False]]],\n  ['regression: scenario 3',\n   [3,\n    False,\n    [[True, False, False],\n     [True, False, True],\n     [False, False, False],\n     [False, False, False],\n     [False, False, True],\n     [True, False, False],\n     [True, True, False],\n     [False, True, False],\n     [False, False, False],\n     [True, False, False],\n     [True, False, False],\n     [True, False, False]]],\n   [[False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [True, False]]]],\n [['regression: chattering condition',\n   [3,\n    False,\n    [[True, False, False],\n     [True, False, False],\n     [False, False, False],\n     [True, False, False],\n     [True, False, False],\n     [True, False, False]]],\n   [[False, True], [False, True], [False, True], [False, True], [False, True], [True, False]]],\n  ['regression: scenario 2',\n   [3,\n    False,\n    [[False, False, False],\n     [True, False, False],\n     [False, False, False],\n     [False, False, False],\n     [False, False, True],\n     [False, True, False],\n     [True, False, False],\n     [False, False, False],\n     [True, True, False],\n     [True, False, False],\n     [True, False, False]]],\n   [[False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [True, False]]],\n  ['regression: latched with ack and reset',\n   [2,\n    True,\n    [[True, False, False],\n     [True, False, False],\n     [False, False, False],\n     [False, True, False],\n     [False, False, True],\n     [True, False, False]]],\n   [[False, True], [True, False], [True, False], [True, True], [False, True], [False, True]]],\n  ['regression: realarm after ack',\n   [1, False, [[True, False, False], [True, True, False], [False, False, False], [True, False, False]]],\n   [[True, False], [True, True], [False, True], [True, False]]],\n  ['regression: reset while condition true',\n   [1, False, [[True, False, False], [True, False, True], [True, False, False]]],\n   [[True, False], [True, False], [True, False]]],\n  ['regression: ack on latched alarm',\n   [1, True, [[True, False, False], [False, True, False], [False, False, False], [False, False, True]]],\n   [[True, False], [True, True], [True, True], [False, True]]],\n  ['regression: scenario 1',\n   [1,\n    False,\n    [[False, False, False],\n     [False, False, True],\n     [False, False, False],\n     [True, True, False],\n     [False, False, False],\n     [True, True, False],\n     [True, False, False],\n     [True, False, False],\n     [True, False, False],\n     [False, False, True],\n     [True, False, False]]],\n   [[False, True],\n    [False, True],\n    [False, True],\n    [True, True],\n    [False, True],\n    [True, True],\n    [True, True],\n    [True, True],\n    [True, True],\n    [False, True],\n    [True, False]]],\n  ['regression: scenario 3',\n   [2,\n    False,\n    [[True, False, False],\n     [True, False, True],\n     [False, True, True],\n     [False, False, False],\n     [False, False, True],\n     [True, False, False],\n     [True, False, False],\n     [True, True, False],\n     [True, False, False],\n     [True, False, True],\n     [False, False, False],\n     [False, False, False]]],\n   [[False, True],\n    [True, False],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [True, False],\n    [True, True],\n    [True, True],\n    [True, True],\n    [False, True],\n    [False, True]]]],\n [['regression: realarm after ack',\n   [1, False, [[True, False, False], [True, True, False], [False, False, False], [True, False, False]]],\n   [[True, False], [True, True], [False, True], [True, False]]],\n  ['regression: scenario 1',\n   [3,\n    False,\n    [[True, False, False],\n     [True, False, False],\n     [True, False, False],\n     [True, False, False],\n     [False, False, False],\n     [True, False, False],\n     [True, False, False],\n     [True, False, False],\n     [False, False, True],\n     [False, False, True]]],\n   [[False, True],\n    [False, True],\n    [True, False],\n    [True, False],\n    [False, False],\n    [False, False],\n    [False, False],\n    [True, False],\n    [False, False],\n    [False, False]]],\n  ['regression: latched with ack and reset',\n   [2,\n    True,\n    [[True, False, False],\n     [True, False, False],\n     [False, False, False],\n     [False, True, False],\n     [False, False, True],\n     [True, False, False]]],\n   [[False, True], [True, False], [True, False], [True, True], [False, True], [False, True]]],\n  ['regression: chattering condition',\n   [3,\n    False,\n    [[True, False, False],\n     [True, False, False],\n     [False, False, False],\n     [True, False, False],\n     [True, False, False],\n     [True, False, False]]],\n   [[False, True], [False, True], [False, True], [False, True], [False, True], [True, False]]],\n  ['regression: reset while condition true',\n   [1, False, [[True, False, False], [True, False, True], [True, False, False]]],\n   [[True, False], [True, False], [True, False]]],\n  ['regression: ack on latched alarm',\n   [1, True, [[True, False, False], [False, True, False], [False, False, False], [False, False, True]]],\n   [[True, False], [True, True], [True, True], [False, True]]],\n  ['regression: scenario 2',\n   [2,\n    True,\n    [[False, True, False],\n     [True, False, False],\n     [True, False, False],\n     [True, False, False],\n     [False, False, False],\n     [True, False, True],\n     [True, False, False],\n     [False, False, False],\n     [False, True, False],\n     [True, False, False],\n     [False, False, False],\n     [False, False, False],\n     [True, False, False],\n     [False, False, False],\n     [True, False, False],\n     [True, True, True]]],\n   [[False, True],\n    [False, True],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, True],\n    [True, True],\n    [True, True],\n    [True, True],\n    [True, True],\n    [True, True],\n    [True, True],\n    [True, True]]],\n  ['regression: scenario 3',\n   [3,\n    True,\n    [[True, False, False],\n     [True, False, False],\n     [True, False, False],\n     [True, False, False],\n     [True, False, True],\n     [True, False, False],\n     [False, False, False],\n     [True, False, False],\n     [False, True, False],\n     [False, False, False],\n     [False, False, False],\n     [True, False, False],\n     [False, False, False]]],\n   [[False, True],\n    [False, True],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, True],\n    [True, True],\n    [True, True],\n    [True, True],\n    [True, True]]]],\n [['regression: reset while condition true',\n   [1, False, [[True, False, False], [True, False, True], [True, False, False]]],\n   [[True, False], [True, False], [True, False]]],\n  ['regression: scenario 2',\n   [2,\n    False,\n    [[False, True, False],\n     [True, False, False],\n     [True, True, False],\n     [True, False, False],\n     [False, False, False],\n     [True, False, False],\n     [False, False, False],\n     [False, False, False],\n     [True, False, False],\n     [True, True, False],\n     [True, False, True],\n     [False, False, False],\n     [True, False, True],\n     [True, True, False],\n     [True, False, False]]],\n   [[False, True],\n    [False, True],\n    [True, True],\n    [True, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [True, True],\n    [True, True],\n    [False, True],\n    [False, True],\n    [True, True],\n    [True, True]]],\n  ['regression: latched with ack and reset',\n   [2,\n    True,\n    [[True, False, False],\n     [True, False, False],\n     [False, False, False],\n     [False, True, False],\n     [False, False, True],\n     [True, False, False]]],\n   [[False, True], [True, False], [True, False], [True, True], [False, True], [False, True]]],\n  ['regression: chattering condition',\n   [3,\n    False,\n    [[True, False, False],\n     [True, False, False],\n     [False, False, False],\n     [True, False, False],\n     [True, False, False],\n     [True, False, False]]],\n   [[False, True], [False, True], [False, True], [False, True], [False, True], [True, False]]],\n  ['regression: realarm after ack',\n   [1, False, [[True, False, False], [True, True, False], [False, False, False], [True, False, False]]],\n   [[True, False], [True, True], [False, True], [True, False]]],\n  ['regression: ack on latched alarm',\n   [1, True, [[True, False, False], [False, True, False], [False, False, False], [False, False, True]]],\n   [[True, False], [True, True], [True, True], [False, True]]],\n  ['regression: scenario 1',\n   [2,\n    True,\n    [[False, True, False],\n     [True, False, False],\n     [False, False, False],\n     [False, False, True],\n     [False, False, True],\n     [True, False, True],\n     [True, True, False],\n     [True, False, False],\n     [True, False, False],\n     [False, False, False],\n     [True, False, False],\n     [True, True, False],\n     [True, False, False]]],\n   [[False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [True, True],\n    [True, True],\n    [True, True],\n    [True, True],\n    [True, True],\n    [True, True],\n    [True, True]]],\n  ['regression: scenario 3',\n   [1,\n    True,\n    [[False, False, False],\n     [False, False, False],\n     [False, False, True],\n     [False, False, False],\n     [True, False, False],\n     [False, False, False],\n     [True, False, True],\n     [True, False, False],\n     [True, True, False],\n     [True, False, True],\n     [True, False, True],\n     [True, True, True]]],\n   [[False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, True],\n    [True, True],\n    [True, True],\n    [True, True]]]],\n [['regression: ack on latched alarm',\n   [1, True, [[True, False, False], [False, True, False], [False, False, False], [False, False, True]]],\n   [[True, False], [True, True], [True, True], [False, True]]],\n  ['regression: scenario 4',\n   [3,\n    False,\n    [[True, False, False],\n     [True, False, True],\n     [True, False, True],\n     [True, False, True],\n     [False, False, False],\n     [True, False, True],\n     [False, False, False],\n     [False, False, False],\n     [False, False, False],\n     [False, False, True]]],\n   [[False, True],\n    [False, True],\n    [True, False],\n    [True, False],\n    [False, False],\n    [False, False],\n    [False, False],\n    [False, False],\n    [False, False],\n    [False, False]]],\n  ['regression: latched with ack and reset',\n   [2,\n    True,\n    [[True, False, False],\n     [True, False, False],\n     [False, False, False],\n     [False, True, False],\n     [False, False, True],\n     [True, False, False]]],\n   [[False, True], [True, False], [True, False], [True, True], [False, True], [False, True]]],\n  ['regression: chattering condition',\n   [3,\n    False,\n    [[True, False, False],\n     [True, False, False],\n     [False, False, False],\n     [True, False, False],\n     [True, False, False],\n     [True, False, False]]],\n   [[False, True], [False, True], [False, True], [False, True], [False, True], [True, False]]],\n  ['regression: realarm after ack',\n   [1, False, [[True, False, False], [True, True, False], [False, False, False], [True, False, False]]],\n   [[True, False], [True, True], [False, True], [True, False]]],\n  ['regression: reset while condition true',\n   [1, False, [[True, False, False], [True, False, True], [True, False, False]]],\n   [[True, False], [True, False], [True, False]]],\n  ['regression: scenario 1',\n   [2,\n    False,\n    [[False, False, False],\n     [True, True, False],\n     [True, True, False],\n     [False, False, True],\n     [False, False, True],\n     [True, True, False],\n     [True, False, False],\n     [False, False, False],\n     [True, False, False],\n     [True, False, True]]],\n   [[False, True],\n    [False, True],\n    [True, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [True, False],\n    [False, False],\n    [False, False],\n    [True, False]]],\n  ['regression: scenario 2',\n   [2,\n    False,\n    [[False, True, False],\n     [True, True, True],\n     [False, False, False],\n     [False, True, True],\n     [True, False, False],\n     [False, False, False],\n     [True, False, True],\n     [False, False, False],\n     [True, False, False],\n     [False, True, False],\n     [False, True, False]]],\n   [[False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True]]]]]\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":"b70615e360e93627067369df83e2e1fbf909de7ebaccaf3b7d8b4e56b67bd056","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(min_scans, latched, scans):\n    in_alarm = False\n    acked = True\n    count = 0\n    out = []\n    for cond, ack, reset in scans:\n        count = count + 1 if cond else 0\n        if count > min_scans and cond and not in_alarm:\n            in_alarm = True\n            acked = False\n        elif in_alarm and not cond and (not latched or reset):\n            in_alarm = False\n        if ack and not acked:\n            acked = True\n        out.append([in_alarm, acked])\n    return out\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[['regression: latched with ack and reset',\n   [2,\n    True,\n    [[True, False, False],\n     [True, False, False],\n     [False, False, False],\n     [False, True, False],\n     [False, False, True],\n     [True, False, False]]],\n   [[False, True], [True, False], [True, False], [True, True], [False, True], [False, True]]],\n  ['regression: chattering condition',\n   [3,\n    False,\n    [[True, False, False],\n     [True, False, False],\n     [False, False, False],\n     [True, False, False],\n     [True, False, False],\n     [True, False, False]]],\n   [[False, True], [False, True], [False, True], [False, True], [False, True], [True, False]]],\n  ['regression: realarm after ack',\n   [1, False, [[True, False, False], [True, True, False], [False, False, False], [True, False, False]]],\n   [[True, False], [True, True], [False, True], [True, False]]],\n  ['regression: reset while condition true',\n   [1, False, [[True, False, False], [True, False, True], [True, False, False]]],\n   [[True, False], [True, False], [True, False]]],\n  ['regression: ack on latched alarm',\n   [1, True, [[True, False, False], [False, True, False], [False, False, False], [False, False, True]]],\n   [[True, False], [True, True], [True, True], [False, True]]],\n  ['regression: scenario 1',\n   [1,\n    False,\n    [[True, False, False],\n     [False, False, False],\n     [True, False, False],\n     [False, False, False],\n     [True, True, False],\n     [True, False, False],\n     [True, False, False],\n     [False, False, False],\n     [False, False, False],\n     [True, False, False]]],\n   [[True, False],\n    [False, False],\n    [True, False],\n    [False, False],\n    [True, True],\n    [True, True],\n    [True, True],\n    [False, True],\n    [False, True],\n    [True, False]]],\n  ['regression: scenario 2',\n   [1,\n    True,\n    [[False, False, False],\n     [True, False, False],\n     [True, False, False],\n     [False, False, False],\n     [False, False, False],\n     [True, False, False],\n     [False, False, False],\n     [False, False, True],\n     [False, False, False],\n     [False, True, False],\n     [True, False, False],\n     [False, False, False]]],\n   [[False, True],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [False, False],\n    [False, False],\n    [False, True],\n    [True, False],\n    [True, False]]],\n  ['regression: scenario 3',\n   [3,\n    False,\n    [[True, False, False],\n     [True, False, True],\n     [False, False, False],\n     [False, False, False],\n     [False, False, True],\n     [True, False, False],\n     [True, True, False],\n     [False, True, False],\n     [False, False, False],\n     [True, False, False],\n     [True, False, False],\n     [True, False, False]]],\n   [[False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [True, False]]]],\n [['regression: chattering condition',\n   [3,\n    False,\n    [[True, False, False],\n     [True, False, False],\n     [False, False, False],\n     [True, False, False],\n     [True, False, False],\n     [True, False, False]]],\n   [[False, True], [False, True], [False, True], [False, True], [False, True], [True, False]]],\n  ['regression: scenario 2',\n   [3,\n    False,\n    [[False, False, False],\n     [True, False, False],\n     [False, False, False],\n     [False, False, False],\n     [False, False, True],\n     [False, True, False],\n     [True, False, False],\n     [False, False, False],\n     [True, True, False],\n     [True, False, False],\n     [True, False, False]]],\n   [[False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [True, False]]],\n  ['regression: latched with ack and reset',\n   [2,\n    True,\n    [[True, False, False],\n     [True, False, False],\n     [False, False, False],\n     [False, True, False],\n     [False, False, True],\n     [True, False, False]]],\n   [[False, True], [True, False], [True, False], [True, True], [False, True], [False, True]]],\n  ['regression: realarm after ack',\n   [1, False, [[True, False, False], [True, True, False], [False, False, False], [True, False, False]]],\n   [[True, False], [True, True], [False, True], [True, False]]],\n  ['regression: reset while condition true',\n   [1, False, [[True, False, False], [True, False, True], [True, False, False]]],\n   [[True, False], [True, False], [True, False]]],\n  ['regression: ack on latched alarm',\n   [1, True, [[True, False, False], [False, True, False], [False, False, False], [False, False, True]]],\n   [[True, False], [True, True], [True, True], [False, True]]],\n  ['regression: scenario 1',\n   [1,\n    False,\n    [[False, False, False],\n     [False, False, True],\n     [False, False, False],\n     [True, True, False],\n     [False, False, False],\n     [True, True, False],\n     [True, False, False],\n     [True, False, False],\n     [True, False, False],\n     [False, False, True],\n     [True, False, False]]],\n   [[False, True],\n    [False, True],\n    [False, True],\n    [True, True],\n    [False, True],\n    [True, True],\n    [True, True],\n    [True, True],\n    [True, True],\n    [False, True],\n    [True, False]]],\n  ['regression: scenario 3',\n   [2,\n    False,\n    [[True, False, False],\n     [True, False, True],\n     [False, True, True],\n     [False, False, False],\n     [False, False, True],\n     [True, False, False],\n     [True, False, False],\n     [True, True, False],\n     [True, False, False],\n     [True, False, True],\n     [False, False, False],\n     [False, False, False]]],\n   [[False, True],\n    [True, False],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [True, False],\n    [True, True],\n    [True, True],\n    [True, True],\n    [False, True],\n    [False, True]]]],\n [['regression: realarm after ack',\n   [1, False, [[True, False, False], [True, True, False], [False, False, False], [True, False, False]]],\n   [[True, False], [True, True], [False, True], [True, False]]],\n  ['regression: scenario 1',\n   [3,\n    False,\n    [[True, False, False],\n     [True, False, False],\n     [True, False, False],\n     [True, False, False],\n     [False, False, False],\n     [True, False, False],\n     [True, False, False],\n     [True, False, False],\n     [False, False, True],\n     [False, False, True]]],\n   [[False, True],\n    [False, True],\n    [True, False],\n    [True, False],\n    [False, False],\n    [False, False],\n    [False, False],\n    [True, False],\n    [False, False],\n    [False, False]]],\n  ['regression: latched with ack and reset',\n   [2,\n    True,\n    [[True, False, False],\n     [True, False, False],\n     [False, False, False],\n     [False, True, False],\n     [False, False, True],\n     [True, False, False]]],\n   [[False, True], [True, False], [True, False], [True, True], [False, True], [False, True]]],\n  ['regression: chattering condition',\n   [3,\n    False,\n    [[True, False, False],\n     [True, False, False],\n     [False, False, False],\n     [True, False, False],\n     [True, False, False],\n     [True, False, False]]],\n   [[False, True], [False, True], [False, True], [False, True], [False, True], [True, False]]],\n  ['regression: reset while condition true',\n   [1, False, [[True, False, False], [True, False, True], [True, False, False]]],\n   [[True, False], [True, False], [True, False]]],\n  ['regression: ack on latched alarm',\n   [1, True, [[True, False, False], [False, True, False], [False, False, False], [False, False, True]]],\n   [[True, False], [True, True], [True, True], [False, True]]],\n  ['regression: scenario 2',\n   [2,\n    True,\n    [[False, True, False],\n     [True, False, False],\n     [True, False, False],\n     [True, False, False],\n     [False, False, False],\n     [True, False, True],\n     [True, False, False],\n     [False, False, False],\n     [False, True, False],\n     [True, False, False],\n     [False, False, False],\n     [False, False, False],\n     [True, False, False],\n     [False, False, False],\n     [True, False, False],\n     [True, True, True]]],\n   [[False, True],\n    [False, True],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, True],\n    [True, True],\n    [True, True],\n    [True, True],\n    [True, True],\n    [True, True],\n    [True, True],\n    [True, True]]],\n  ['regression: scenario 3',\n   [3,\n    True,\n    [[True, False, False],\n     [True, False, False],\n     [True, False, False],\n     [True, False, False],\n     [True, False, True],\n     [True, False, False],\n     [False, False, False],\n     [True, False, False],\n     [False, True, False],\n     [False, False, False],\n     [False, False, False],\n     [True, False, False],\n     [False, False, False]]],\n   [[False, True],\n    [False, True],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, True],\n    [True, True],\n    [True, True],\n    [True, True],\n    [True, True]]]],\n [['regression: reset while condition true',\n   [1, False, [[True, False, False], [True, False, True], [True, False, False]]],\n   [[True, False], [True, False], [True, False]]],\n  ['regression: scenario 2',\n   [2,\n    False,\n    [[False, True, False],\n     [True, False, False],\n     [True, True, False],\n     [True, False, False],\n     [False, False, False],\n     [True, False, False],\n     [False, False, False],\n     [False, False, False],\n     [True, False, False],\n     [True, True, False],\n     [True, False, True],\n     [False, False, False],\n     [True, False, True],\n     [True, True, False],\n     [True, False, False]]],\n   [[False, True],\n    [False, True],\n    [True, True],\n    [True, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [True, True],\n    [True, True],\n    [False, True],\n    [False, True],\n    [True, True],\n    [True, True]]],\n  ['regression: latched with ack and reset',\n   [2,\n    True,\n    [[True, False, False],\n     [True, False, False],\n     [False, False, False],\n     [False, True, False],\n     [False, False, True],\n     [True, False, False]]],\n   [[False, True], [True, False], [True, False], [True, True], [False, True], [False, True]]],\n  ['regression: chattering condition',\n   [3,\n    False,\n    [[True, False, False],\n     [True, False, False],\n     [False, False, False],\n     [True, False, False],\n     [True, False, False],\n     [True, False, False]]],\n   [[False, True], [False, True], [False, True], [False, True], [False, True], [True, False]]],\n  ['regression: realarm after ack',\n   [1, False, [[True, False, False], [True, True, False], [False, False, False], [True, False, False]]],\n   [[True, False], [True, True], [False, True], [True, False]]],\n  ['regression: ack on latched alarm',\n   [1, True, [[True, False, False], [False, True, False], [False, False, False], [False, False, True]]],\n   [[True, False], [True, True], [True, True], [False, True]]],\n  ['regression: scenario 1',\n   [2,\n    True,\n    [[False, True, False],\n     [True, False, False],\n     [False, False, False],\n     [False, False, True],\n     [False, False, True],\n     [True, False, True],\n     [True, True, False],\n     [True, False, False],\n     [True, False, False],\n     [False, False, False],\n     [True, False, False],\n     [True, True, False],\n     [True, False, False]]],\n   [[False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [True, True],\n    [True, True],\n    [True, True],\n    [True, True],\n    [True, True],\n    [True, True],\n    [True, True]]],\n  ['regression: scenario 3',\n   [1,\n    True,\n    [[False, False, False],\n     [False, False, False],\n     [False, False, True],\n     [False, False, False],\n     [True, False, False],\n     [False, False, False],\n     [True, False, True],\n     [True, False, False],\n     [True, True, False],\n     [True, False, True],\n     [True, False, True],\n     [True, True, True]]],\n   [[False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, True],\n    [True, True],\n    [True, True],\n    [True, True]]]],\n [['regression: ack on latched alarm',\n   [1, True, [[True, False, False], [False, True, False], [False, False, False], [False, False, True]]],\n   [[True, False], [True, True], [True, True], [False, True]]],\n  ['regression: scenario 4',\n   [3,\n    False,\n    [[True, False, False],\n     [True, False, True],\n     [True, False, True],\n     [True, False, True],\n     [False, False, False],\n     [True, False, True],\n     [False, False, False],\n     [False, False, False],\n     [False, False, False],\n     [False, False, True]]],\n   [[False, True],\n    [False, True],\n    [True, False],\n    [True, False],\n    [False, False],\n    [False, False],\n    [False, False],\n    [False, False],\n    [False, False],\n    [False, False]]],\n  ['regression: latched with ack and reset',\n   [2,\n    True,\n    [[True, False, False],\n     [True, False, False],\n     [False, False, False],\n     [False, True, False],\n     [False, False, True],\n     [True, False, False]]],\n   [[False, True], [True, False], [True, False], [True, True], [False, True], [False, True]]],\n  ['regression: chattering condition',\n   [3,\n    False,\n    [[True, False, False],\n     [True, False, False],\n     [False, False, False],\n     [True, False, False],\n     [True, False, False],\n     [True, False, False]]],\n   [[False, True], [False, True], [False, True], [False, True], [False, True], [True, False]]],\n  ['regression: realarm after ack',\n   [1, False, [[True, False, False], [True, True, False], [False, False, False], [True, False, False]]],\n   [[True, False], [True, True], [False, True], [True, False]]],\n  ['regression: reset while condition true',\n   [1, False, [[True, False, False], [True, False, True], [True, False, False]]],\n   [[True, False], [True, False], [True, False]]],\n  ['regression: scenario 1',\n   [2,\n    False,\n    [[False, False, False],\n     [True, True, False],\n     [True, True, False],\n     [False, False, True],\n     [False, False, True],\n     [True, True, False],\n     [True, False, False],\n     [False, False, False],\n     [True, False, False],\n     [True, False, True]]],\n   [[False, True],\n    [False, True],\n    [True, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [True, False],\n    [False, False],\n    [False, False],\n    [True, False]]],\n  ['regression: scenario 2',\n   [2,\n    False,\n    [[False, True, False],\n     [True, True, True],\n     [False, False, False],\n     [False, True, True],\n     [True, False, False],\n     [False, False, False],\n     [True, False, True],\n     [False, False, False],\n     [True, False, False],\n     [False, True, False],\n     [False, True, False]]],\n   [[False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True]]]]]\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":"A deterministic bounded teaching model of one PLC instruction or rung pattern evaluated scan by scan. The stated contract is a stipulated toy convention, not a claim of conformance to any vendor controller or IEC 61131-3 runtime. 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-plc-ladder-logic-scan-cycles-digital-alarm-block-duration-compare","generated_at":"2026-09-29T14:51:43.357003+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"Ladder programs are executed as repeated scans; each defect here changes what a rung, timer, counter or data-table instruction reports on a particular scan, which is how commissioning and field faults are actually observed.","root_cause":"The activation test uses count > min_scans.","sha256":"f6fdb9e6e7525afd5b3b0948f8476ff51e7e9eb257c63a67068e0e69836caef8","title":"Alarm activates one scan after its minimum duration · 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":43.298,"exit_code":1,"observations":[{"actual":[[true,false],[true,false],[true,false],[true,true],[false,true],[true,false]],"check":"regression: latched with ack and reset","expected":[[false,true],[true,false],[true,false],[true,true],[false,true],[false,true]],"passed":false},{"actual":[[false,true],[true,false],[false,false],[false,false],[true,false],[true,false]],"check":"regression: chattering condition","expected":[[false,true],[false,true],[false,true],[false,true],[false,true],[true,false]],"passed":false},{"actual":[[true,false],[true,true],[false,true],[true,false]],"check":"regression: realarm after ack","expected":[[true,false],[true,true],[false,true],[true,false]],"passed":true},{"actual":[[true,false],[true,false],[true,false]],"check":"regression: reset while condition true","expected":[[true,false],[true,false],[true,false]],"passed":true},{"actual":[[true,false],[true,true],[true,true],[false,true]],"check":"regression: ack on latched alarm","expected":[[true,false],[true,true],[true,true],[false,true]],"passed":true},{"actual":[[true,false],[false,false],[true,false],[false,false],[true,true],[true,true],[true,true],[false,true],[false,true],[true,false]],"check":"regression: scenario 1","expected":[[true,false],[false,false],[true,false],[false,false],[true,true],[true,true],[true,true],[false,true],[false,true],[true,false]],"passed":true},{"actual":[[false,true],[true,false],[true,false],[true,false],[true,false],[true,false],[true,false],[false,false],[false,false],[false,true],[true,false],[true,false]],"check":"regression: scenario 2","expected":[[false,true],[true,false],[true,false],[true,false],[true,false],[true,false],[true,false],[false,false],[false,false],[false,true],[true,false],[true,false]],"passed":true},{"actual":[[false,true],[true,false],[false,false],[false,false],[false,false],[false,false],[true,true],[false,true],[false,true],[false,true],[true,false],[true,false]],"check":"regression: scenario 3","expected":[[false,true],[false,true],[false,true],[false,true],[false,true],[false,true],[false,true],[false,true],[false,true],[false,true],[false,true],[true,false]],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"regression: latched with ack and reset\", \"actual\": [[true, false], [true, false], [true, false], [true, true], [false, true], [true, false]], \"expected\": [[false, true], [true, false], [true, false], [true, true], [false, true], [false, true]], \"passed\": false}, {\"check\": \"regression: chattering condition\", \"actual\": [[false, true], [true, false], [false, false], [false, false], [true, false], [true, false]], \"expected\": [[false, true], [false, true], [false, true], [false, true], [false, true], [true, false]], \"passed\": false}, {\"check\": \"regression: realarm after ack\", \"actual\": [[true, false], [true, true], [false, true], [true, false]], \"expected\": [[true, false], [true, true], [false, true], [true, false]], \"passed\": true}, {\"check\": \"regression: reset while condition true\", \"actual\": [[true, false], [true, false], [true, false]], \"expected\": [[true, false], [true, false], [true, false]], \"passed\": true}, {\"check\": \"regression: ack on latched alarm\", \"actual\": [[true, false], [true, true], [true, true], [false, true]], \"expected\": [[true, false], [true, true], [true, true], [false, true]], \"passed\": true}, {\"check\": \"regression: scenario 1\", \"actual\": [[true, false], [false, false], [true, false], [false, false], [true, true], [true, true], [true, true], [false, true], [false, true], [true, false]], \"expected\": [[true, false], [false, false], [true, false], [false, false], [true, true], [true, true], [true, true], [false, true], [false, true], [true, false]], \"passed\": true}, {\"check\": \"regression: scenario 2\", \"actual\": [[false, true], [true, false], [true, false], [true, false], [true, false], [true, false], [true, false], [false, false], [false, false], [false, true], [true, false], [true, false]], \"expected\": [[false, true], [true, false], [true, false], [true, false], [true, false], [true, false], [true, false], [false, false], [false, false], [false, true], [true, false], [true, false]], \"passed\": true}, {\"check\": \"regression: scenario 3\", \"actual\": [[false, true], [true, false], [false, false], [false, false], [false, false], [false, false], [true, true], [false, true], [false, true], [false, true], [true, false], [true, false]], \"expected\": [[false, true], [false, true], [false, true], [false, true], [false, true], [false, true], [false, true], [false, true], [false, true], [false, true], [false, true], [true, false]], \"passed\": false}], \"passed\": false}\n"},"broken":{"elapsed_ms":44.416,"exit_code":1,"observations":[{"actual":[[false,true],[false,true],[false,true],[false,true],[false,true],[false,true]],"check":"regression: latched with ack and reset","expected":[[false,true],[true,false],[true,false],[true,true],[false,true],[false,true]],"passed":false},{"actual":[[false,true],[false,true],[false,true],[false,true],[false,true],[false,true]],"check":"regression: chattering condition","expected":[[false,true],[false,true],[false,true],[false,true],[false,true],[true,false]],"passed":false},{"actual":[[false,true],[true,true],[false,true],[false,true]],"check":"regression: realarm after ack","expected":[[true,false],[true,true],[false,true],[true,false]],"passed":false},{"actual":[[false,true],[true,false],[true,false]],"check":"regression: reset while condition true","expected":[[true,false],[true,false],[true,false]],"passed":false},{"actual":[[false,true],[false,true],[false,true],[false,true]],"check":"regression: ack on latched alarm","expected":[[true,false],[true,true],[true,true],[false,true]],"passed":false},{"actual":[[false,true],[false,true],[false,true],[false,true],[false,true],[true,false],[true,false],[false,false],[false,false],[false,false]],"check":"regression: scenario 1","expected":[[true,false],[false,false],[true,false],[false,false],[true,true],[true,true],[true,true],[false,true],[false,true],[true,false]],"passed":false},{"actual":[[false,true],[false,true],[true,false],[true,false],[true,false],[true,false],[true,false],[false,false],[false,false],[false,true],[false,true],[false,true]],"check":"regression: scenario 2","expected":[[false,true],[true,false],[true,false],[true,false],[true,false],[true,false],[true,false],[false,false],[false,false],[false,true],[true,false],[true,false]],"passed":false},{"actual":[[false,true],[false,true],[false,true],[false,true],[false,true],[false,true],[false,true],[false,true],[false,true],[false,true],[false,true],[false,true]],"check":"regression: scenario 3","expected":[[false,true],[false,true],[false,true],[false,true],[false,true],[false,true],[false,true],[false,true],[false,true],[false,true],[false,true],[true,false]],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"regression: latched with ack and reset\", \"actual\": [[false, true], [false, true], [false, true], [false, true], [false, true], [false, true]], \"expected\": [[false, true], [true, false], [true, false], [true, true], [false, true], [false, true]], \"passed\": false}, {\"check\": \"regression: chattering condition\", \"actual\": [[false, true], [false, true], [false, true], [false, true], [false, true], [false, true]], \"expected\": [[false, true], [false, true], [false, true], [false, true], [false, true], [true, false]], \"passed\": false}, {\"check\": \"regression: realarm after ack\", \"actual\": [[false, true], [true, true], [false, true], [false, true]], \"expected\": [[true, false], [true, true], [false, true], [true, false]], \"passed\": false}, {\"check\": \"regression: reset while condition true\", \"actual\": [[false, true], [true, false], [true, false]], \"expected\": [[true, false], [true, false], [true, false]], \"passed\": false}, {\"check\": \"regression: ack on latched alarm\", \"actual\": [[false, true], [false, true], [false, true], [false, true]], \"expected\": [[true, false], [true, true], [true, true], [false, true]], \"passed\": false}, {\"check\": \"regression: scenario 1\", \"actual\": [[false, true], [false, true], [false, true], [false, true], [false, true], [true, false], [true, false], [false, false], [false, false], [false, false]], \"expected\": [[true, false], [false, false], [true, false], [false, false], [true, true], [true, true], [true, true], [false, true], [false, true], [true, false]], \"passed\": false}, {\"check\": \"regression: scenario 2\", \"actual\": [[false, true], [false, true], [true, false], [true, false], [true, false], [true, false], [true, false], [false, false], [false, false], [false, true], [false, true], [false, true]], \"expected\": [[false, true], [true, false], [true, false], [true, false], [true, false], [true, false], [true, false], [false, false], [false, false], [false, true], [true, false], [true, false]], \"passed\": false}, {\"check\": \"regression: scenario 3\", \"actual\": [[false, true], [false, true], [false, true], [false, true], [false, true], [false, true], [false, true], [false, true], [false, true], [false, true], [false, true], [false, true]], \"expected\": [[false, true], [false, true], [false, true], [false, true], [false, true], [false, true], [false, true], [false, true], [false, true], [false, true], [false, true], [true, false]], \"passed\": false}], \"passed\": false}\n"}},"member_only":{"stages":["fixed"],"fields":["implementations.fixed","verification.fixed","harness","repair"],"note":"The verified repair, its recorded checks, the repair description, and the scoring harness are available to members."}}