{"abstract":"Pressing reset with the heater element still tripped lets the motor restart on a live overload.","category":"PLC ladder logic scan cycles","checks":8,"contract":"Three-wire motor starter rung evaluated per scan. Each scan is a dict with optional keys start (pushbutton, default false), stop_nc (normally-closed stop contact: true means not pressed, default true), ol_nc (normally-closed overload contact, default true), reset (default false) and power (default true). An open overload contact latches a trip (retentive); reset clears it only on a scan where the overload contact is closed. The motor runs on start or its own seal-in, and only while stop_nc is closed and no trip is latched; stop and trip dominate start. A power-loss scan drops the motor and requires the start button to be seen released before it can start again. Return [motor, tripped] per scan.","contract_signature":"scans","evaluation_group":"w2-plc-ladder-logic-scan-cycles-motor-seal-in","failed_approach":"Ignoring reset while start is pressed still clears a trip whose overload is open.","family":"w2-plc-ladder-logic-scan-cycles-motor-seal-in-reset-while-overload-open","id":"FA-92001","implementations":{"attempt":{"sha256":"e93eb5cb7b8a21408899d033c92ed9f6c287096a540dea976810cdf62d333584","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(scans):\n    motor = False\n    tripped = False\n    need_release = False\n    out = []\n    for s in scans:\n        if not s.get('power', True):\n            motor = False\n            need_release = True\n            out.append([False, tripped])\n            continue\n        start = s.get('start', False)\n        if not start:\n            need_release = False\n        if not s.get('ol_nc', True):\n            tripped = True\n        if s.get('reset', False) and not start:\n            tripped = False\n        run_cmd = (start and not need_release) or motor\n        motor = run_cmd and s.get('stop_nc', True) and not tripped\n        out.append([motor, tripped])\n    return out\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[['regression: reset while overload open',\n   [[{'start': True}, {'ol_nc': False, 'reset': True}, {'start': True}]],\n   [[True, False], [False, True], [False, True]]],\n  ['regression: scenario 3',\n   [[{'start': True, 'ol_nc': False},\n     {'stop_nc': False, 'ol_nc': True},\n     {},\n     {'stop_nc': True},\n     {'start': True, 'stop_nc': True},\n     {'stop_nc': False},\n     {'start': True, 'reset': True}]],\n   [[False, True], [False, True], [False, True], [False, True], [False, True], [False, True], [True, False]]],\n  ['control: start seal stop',\n   [[{'start': True}, {}, {'stop_nc': False}, {}, {'start': True}]],\n   [[True, False], [True, False], [False, False], [False, False], [True, False]]],\n  ['control: power loss with start held',\n   [[{'start': True}, {'power': False}, {'start': True}, {}, {'start': True}]],\n   [[True, False], [False, False], [False, False], [False, False], [True, False]]],\n  ['control: overload trip and reset',\n   [[{'start': True}, {'ol_nc': False}, {}, {'start': True}, {'reset': True}, {'start': True}]],\n   [[True, False], [False, True], [False, True], [False, True], [False, False], [True, False]]],\n  ['control: stop and start together',\n   [[{'start': True, 'stop_nc': False}, {'start': True}, {'start': True, 'stop_nc': False}]],\n   [[False, False], [True, False], [False, False]]],\n  ['control: trip across power loss',\n   [[{'start': True}, {'ol_nc': False}, {'power': False}, {}, {'start': True}]],\n   [[True, False], [False, True], [False, True], [False, True], [False, True]]],\n  ['control: start after overload recovers',\n   [[{'start': True}, {'ol_nc': False}, {}, {'start': True}, {}]],\n   [[True, False], [False, True], [False, True], [False, True], [False, True]]]],\n [['regression: scenario 4',\n   [[{'start': False, 'stop_nc': False},\n     {'stop_nc': True},\n     {'ol_nc': False},\n     {'stop_nc': True},\n     {'stop_nc': False, 'ol_nc': False, 'reset': True},\n     {'start': False, 'stop_nc': False, 'ol_nc': False},\n     {'start': False, 'reset': True},\n     {'start': True},\n     {},\n     {'ol_nc': False, 'reset': True},\n     {'start': True},\n     {'ol_nc': True}]],\n   [[False, False],\n    [False, False],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, False],\n    [True, False],\n    [True, False],\n    [False, True],\n    [False, True],\n    [False, True]]],\n  ['regression: scenario 6',\n   [[{'start': True, 'stop_nc': False},\n     {'start': True, 'reset': True},\n     {'start': True, 'stop_nc': True},\n     {'start': True},\n     {'ol_nc': True, 'reset': True},\n     {'stop_nc': True, 'ol_nc': False},\n     {'start': False, 'stop_nc': False, 'ol_nc': False, 'reset': True},\n     {},\n     {'start': True, 'stop_nc': False, 'ol_nc': True},\n     {'start': True},\n     {'start': True},\n     {'stop_nc': True},\n     {}]],\n   [[False, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [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  ['control: start seal stop',\n   [[{'start': True}, {}, {'stop_nc': False}, {}, {'start': True}]],\n   [[True, False], [True, False], [False, False], [False, False], [True, False]]],\n  ['control: power loss with start held',\n   [[{'start': True}, {'power': False}, {'start': True}, {}, {'start': True}]],\n   [[True, False], [False, False], [False, False], [False, False], [True, False]]],\n  ['control: overload trip and reset',\n   [[{'start': True}, {'ol_nc': False}, {}, {'start': True}, {'reset': True}, {'start': True}]],\n   [[True, False], [False, True], [False, True], [False, True], [False, False], [True, False]]],\n  ['regression: reset while overload open',\n   [[{'start': True}, {'ol_nc': False, 'reset': True}, {'start': True}]],\n   [[True, False], [False, True], [False, True]]],\n  ['control: stop and start together',\n   [[{'start': True, 'stop_nc': False}, {'start': True}, {'start': True, 'stop_nc': False}]],\n   [[False, False], [True, False], [False, False]]],\n  ['control: trip across power loss',\n   [[{'start': True}, {'ol_nc': False}, {'power': False}, {}, {'start': True}]],\n   [[True, False], [False, True], [False, True], [False, True], [False, True]]]],\n [['regression: scenario 11',\n   [[{'stop_nc': True},\n     {'stop_nc': False},\n     {'stop_nc': False},\n     {'stop_nc': False},\n     {'stop_nc': True, 'reset': True},\n     {'stop_nc': True},\n     {'start': True},\n     {'start': False},\n     {},\n     {'stop_nc': False},\n     {'stop_nc': False, 'power': False},\n     {},\n     {'stop_nc': True, 'ol_nc': False, 'reset': True}]],\n   [[False, False],\n    [False, False],\n    [False, False],\n    [False, False],\n    [False, False],\n    [False, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [False, False],\n    [False, False],\n    [False, False],\n    [False, True]]],\n  ['regression: scenario 14',\n   [[{'stop_nc': True, 'ol_nc': False, 'reset': True},\n     {'start': True, 'stop_nc': True, 'ol_nc': True, 'reset': True},\n     {'start': False, 'stop_nc': True},\n     {},\n     {'stop_nc': True},\n     {'start': True, 'stop_nc': True, 'ol_nc': True, 'reset': True, 'power': False},\n     {}]],\n   [[False, True],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [False, False],\n    [False, False]]],\n  ['control: start seal stop',\n   [[{'start': True}, {}, {'stop_nc': False}, {}, {'start': True}]],\n   [[True, False], [True, False], [False, False], [False, False], [True, False]]],\n  ['control: power loss with start held',\n   [[{'start': True}, {'power': False}, {'start': True}, {}, {'start': True}]],\n   [[True, False], [False, False], [False, False], [False, False], [True, False]]],\n  ['control: overload trip and reset',\n   [[{'start': True}, {'ol_nc': False}, {}, {'start': True}, {'reset': True}, {'start': True}]],\n   [[True, False], [False, True], [False, True], [False, True], [False, False], [True, False]]],\n  ['regression: reset while overload open',\n   [[{'start': True}, {'ol_nc': False, 'reset': True}, {'start': True}]],\n   [[True, False], [False, True], [False, True]]],\n  ['control: stop and start together',\n   [[{'start': True, 'stop_nc': False}, {'start': True}, {'start': True, 'stop_nc': False}]],\n   [[False, False], [True, False], [False, False]]],\n  ['control: trip across power loss',\n   [[{'start': True}, {'ol_nc': False}, {'power': False}, {}, {'start': True}]],\n   [[True, False], [False, True], [False, True], [False, True], [False, True]]]],\n [['regression: scenario 15',\n   [[{},\n     {},\n     {'ol_nc': False},\n     {'start': True},\n     {'reset': True},\n     {'stop_nc': True},\n     {'stop_nc': False, 'reset': True},\n     {'start': True, 'ol_nc': False, 'reset': True},\n     {'ol_nc': False},\n     {},\n     {'start': False, 'power': False},\n     {},\n     {'start': True, 'stop_nc': False},\n     {'start': True}]],\n   [[False, False],\n    [False, False],\n    [False, True],\n    [False, True],\n    [False, False],\n    [False, False],\n    [False, False],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True]]],\n  ['regression: scenario 14',\n   [[{'start': False, 'ol_nc': True},\n     {'stop_nc': False},\n     {},\n     {'start': True},\n     {'stop_nc': True},\n     {'start': True},\n     {},\n     {'ol_nc': True, 'reset': True},\n     {'ol_nc': False},\n     {'stop_nc': False, 'ol_nc': False, 'reset': True},\n     {'power': False}]],\n   [[False, False],\n    [False, False],\n    [False, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [False, True],\n    [False, True],\n    [False, True]]],\n  ['control: start seal stop',\n   [[{'start': True}, {}, {'stop_nc': False}, {}, {'start': True}]],\n   [[True, False], [True, False], [False, False], [False, False], [True, False]]],\n  ['control: power loss with start held',\n   [[{'start': True}, {'power': False}, {'start': True}, {}, {'start': True}]],\n   [[True, False], [False, False], [False, False], [False, False], [True, False]]],\n  ['control: overload trip and reset',\n   [[{'start': True}, {'ol_nc': False}, {}, {'start': True}, {'reset': True}, {'start': True}]],\n   [[True, False], [False, True], [False, True], [False, True], [False, False], [True, False]]],\n  ['regression: reset while overload open',\n   [[{'start': True}, {'ol_nc': False, 'reset': True}, {'start': True}]],\n   [[True, False], [False, True], [False, True]]],\n  ['control: stop and start together',\n   [[{'start': True, 'stop_nc': False}, {'start': True}, {'start': True, 'stop_nc': False}]],\n   [[False, False], [True, False], [False, False]]],\n  ['control: trip across power loss',\n   [[{'start': True}, {'ol_nc': False}, {'power': False}, {}, {'start': True}]],\n   [[True, False], [False, True], [False, True], [False, True], [False, True]]]],\n [['regression: scenario 14',\n   [[{'start': True, 'stop_nc': True},\n     {'start': True},\n     {'reset': True},\n     {},\n     {'start': True},\n     {'stop_nc': True},\n     {'stop_nc': False, 'ol_nc': False, 'reset': True},\n     {'stop_nc': False},\n     {'reset': True, 'power': False},\n     {'start': False},\n     {'start': False, 'stop_nc': True, 'reset': True}]],\n   [[True, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, False]]],\n  ['regression: scenario 16',\n   [[{'start': True},\n     {'start': True, 'reset': True},\n     {'start': True},\n     {'start': True},\n     {'start': True},\n     {'start': True, 'ol_nc': False},\n     {'start': True, 'stop_nc': True, 'reset': True},\n     {'start': False},\n     {'stop_nc': False, 'ol_nc': False},\n     {'start': True, 'stop_nc': True, 'power': False}]],\n   [[True, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [False, True],\n    [True, False],\n    [True, False],\n    [False, True],\n    [False, True]]],\n  ['control: start seal stop',\n   [[{'start': True}, {}, {'stop_nc': False}, {}, {'start': True}]],\n   [[True, False], [True, False], [False, False], [False, False], [True, False]]],\n  ['control: power loss with start held',\n   [[{'start': True}, {'power': False}, {'start': True}, {}, {'start': True}]],\n   [[True, False], [False, False], [False, False], [False, False], [True, False]]],\n  ['control: overload trip and reset',\n   [[{'start': True}, {'ol_nc': False}, {}, {'start': True}, {'reset': True}, {'start': True}]],\n   [[True, False], [False, True], [False, True], [False, True], [False, False], [True, False]]],\n  ['regression: reset while overload open',\n   [[{'start': True}, {'ol_nc': False, 'reset': True}, {'start': True}]],\n   [[True, False], [False, True], [False, True]]],\n  ['control: stop and start together',\n   [[{'start': True, 'stop_nc': False}, {'start': True}, {'start': True, 'stop_nc': False}]],\n   [[False, False], [True, False], [False, False]]],\n  ['control: trip across power loss',\n   [[{'start': True}, {'ol_nc': False}, {'power': False}, {}, {'start': True}]],\n   [[True, False], [False, True], [False, True], [False, True], [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":"5e9ce06b79c3f4000b14ec34cf733509f0852c480f7b5a835bfe1ffefb26b3b1","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(scans):\n    motor = False\n    tripped = False\n    need_release = False\n    out = []\n    for s in scans:\n        if not s.get('power', True):\n            motor = False\n            need_release = True\n            out.append([False, tripped])\n            continue\n        start = s.get('start', False)\n        if not start:\n            need_release = False\n        if not s.get('ol_nc', True):\n            tripped = True\n        if s.get('reset', False):\n            tripped = False\n        run_cmd = (start and not need_release) or motor\n        motor = run_cmd and s.get('stop_nc', True) and not tripped\n        out.append([motor, tripped])\n    return out\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[['regression: reset while overload open',\n   [[{'start': True}, {'ol_nc': False, 'reset': True}, {'start': True}]],\n   [[True, False], [False, True], [False, True]]],\n  ['regression: scenario 3',\n   [[{'start': True, 'ol_nc': False},\n     {'stop_nc': False, 'ol_nc': True},\n     {},\n     {'stop_nc': True},\n     {'start': True, 'stop_nc': True},\n     {'stop_nc': False},\n     {'start': True, 'reset': True}]],\n   [[False, True], [False, True], [False, True], [False, True], [False, True], [False, True], [True, False]]],\n  ['control: start seal stop',\n   [[{'start': True}, {}, {'stop_nc': False}, {}, {'start': True}]],\n   [[True, False], [True, False], [False, False], [False, False], [True, False]]],\n  ['control: power loss with start held',\n   [[{'start': True}, {'power': False}, {'start': True}, {}, {'start': True}]],\n   [[True, False], [False, False], [False, False], [False, False], [True, False]]],\n  ['control: overload trip and reset',\n   [[{'start': True}, {'ol_nc': False}, {}, {'start': True}, {'reset': True}, {'start': True}]],\n   [[True, False], [False, True], [False, True], [False, True], [False, False], [True, False]]],\n  ['control: stop and start together',\n   [[{'start': True, 'stop_nc': False}, {'start': True}, {'start': True, 'stop_nc': False}]],\n   [[False, False], [True, False], [False, False]]],\n  ['control: trip across power loss',\n   [[{'start': True}, {'ol_nc': False}, {'power': False}, {}, {'start': True}]],\n   [[True, False], [False, True], [False, True], [False, True], [False, True]]],\n  ['control: start after overload recovers',\n   [[{'start': True}, {'ol_nc': False}, {}, {'start': True}, {}]],\n   [[True, False], [False, True], [False, True], [False, True], [False, True]]]],\n [['regression: scenario 4',\n   [[{'start': False, 'stop_nc': False},\n     {'stop_nc': True},\n     {'ol_nc': False},\n     {'stop_nc': True},\n     {'stop_nc': False, 'ol_nc': False, 'reset': True},\n     {'start': False, 'stop_nc': False, 'ol_nc': False},\n     {'start': False, 'reset': True},\n     {'start': True},\n     {},\n     {'ol_nc': False, 'reset': True},\n     {'start': True},\n     {'ol_nc': True}]],\n   [[False, False],\n    [False, False],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, False],\n    [True, False],\n    [True, False],\n    [False, True],\n    [False, True],\n    [False, True]]],\n  ['regression: scenario 6',\n   [[{'start': True, 'stop_nc': False},\n     {'start': True, 'reset': True},\n     {'start': True, 'stop_nc': True},\n     {'start': True},\n     {'ol_nc': True, 'reset': True},\n     {'stop_nc': True, 'ol_nc': False},\n     {'start': False, 'stop_nc': False, 'ol_nc': False, 'reset': True},\n     {},\n     {'start': True, 'stop_nc': False, 'ol_nc': True},\n     {'start': True},\n     {'start': True},\n     {'stop_nc': True},\n     {}]],\n   [[False, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [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  ['control: start seal stop',\n   [[{'start': True}, {}, {'stop_nc': False}, {}, {'start': True}]],\n   [[True, False], [True, False], [False, False], [False, False], [True, False]]],\n  ['control: power loss with start held',\n   [[{'start': True}, {'power': False}, {'start': True}, {}, {'start': True}]],\n   [[True, False], [False, False], [False, False], [False, False], [True, False]]],\n  ['control: overload trip and reset',\n   [[{'start': True}, {'ol_nc': False}, {}, {'start': True}, {'reset': True}, {'start': True}]],\n   [[True, False], [False, True], [False, True], [False, True], [False, False], [True, False]]],\n  ['regression: reset while overload open',\n   [[{'start': True}, {'ol_nc': False, 'reset': True}, {'start': True}]],\n   [[True, False], [False, True], [False, True]]],\n  ['control: stop and start together',\n   [[{'start': True, 'stop_nc': False}, {'start': True}, {'start': True, 'stop_nc': False}]],\n   [[False, False], [True, False], [False, False]]],\n  ['control: trip across power loss',\n   [[{'start': True}, {'ol_nc': False}, {'power': False}, {}, {'start': True}]],\n   [[True, False], [False, True], [False, True], [False, True], [False, True]]]],\n [['regression: scenario 11',\n   [[{'stop_nc': True},\n     {'stop_nc': False},\n     {'stop_nc': False},\n     {'stop_nc': False},\n     {'stop_nc': True, 'reset': True},\n     {'stop_nc': True},\n     {'start': True},\n     {'start': False},\n     {},\n     {'stop_nc': False},\n     {'stop_nc': False, 'power': False},\n     {},\n     {'stop_nc': True, 'ol_nc': False, 'reset': True}]],\n   [[False, False],\n    [False, False],\n    [False, False],\n    [False, False],\n    [False, False],\n    [False, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [False, False],\n    [False, False],\n    [False, False],\n    [False, True]]],\n  ['regression: scenario 14',\n   [[{'stop_nc': True, 'ol_nc': False, 'reset': True},\n     {'start': True, 'stop_nc': True, 'ol_nc': True, 'reset': True},\n     {'start': False, 'stop_nc': True},\n     {},\n     {'stop_nc': True},\n     {'start': True, 'stop_nc': True, 'ol_nc': True, 'reset': True, 'power': False},\n     {}]],\n   [[False, True],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [False, False],\n    [False, False]]],\n  ['control: start seal stop',\n   [[{'start': True}, {}, {'stop_nc': False}, {}, {'start': True}]],\n   [[True, False], [True, False], [False, False], [False, False], [True, False]]],\n  ['control: power loss with start held',\n   [[{'start': True}, {'power': False}, {'start': True}, {}, {'start': True}]],\n   [[True, False], [False, False], [False, False], [False, False], [True, False]]],\n  ['control: overload trip and reset',\n   [[{'start': True}, {'ol_nc': False}, {}, {'start': True}, {'reset': True}, {'start': True}]],\n   [[True, False], [False, True], [False, True], [False, True], [False, False], [True, False]]],\n  ['regression: reset while overload open',\n   [[{'start': True}, {'ol_nc': False, 'reset': True}, {'start': True}]],\n   [[True, False], [False, True], [False, True]]],\n  ['control: stop and start together',\n   [[{'start': True, 'stop_nc': False}, {'start': True}, {'start': True, 'stop_nc': False}]],\n   [[False, False], [True, False], [False, False]]],\n  ['control: trip across power loss',\n   [[{'start': True}, {'ol_nc': False}, {'power': False}, {}, {'start': True}]],\n   [[True, False], [False, True], [False, True], [False, True], [False, True]]]],\n [['regression: scenario 15',\n   [[{},\n     {},\n     {'ol_nc': False},\n     {'start': True},\n     {'reset': True},\n     {'stop_nc': True},\n     {'stop_nc': False, 'reset': True},\n     {'start': True, 'ol_nc': False, 'reset': True},\n     {'ol_nc': False},\n     {},\n     {'start': False, 'power': False},\n     {},\n     {'start': True, 'stop_nc': False},\n     {'start': True}]],\n   [[False, False],\n    [False, False],\n    [False, True],\n    [False, True],\n    [False, False],\n    [False, False],\n    [False, False],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True]]],\n  ['regression: scenario 14',\n   [[{'start': False, 'ol_nc': True},\n     {'stop_nc': False},\n     {},\n     {'start': True},\n     {'stop_nc': True},\n     {'start': True},\n     {},\n     {'ol_nc': True, 'reset': True},\n     {'ol_nc': False},\n     {'stop_nc': False, 'ol_nc': False, 'reset': True},\n     {'power': False}]],\n   [[False, False],\n    [False, False],\n    [False, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [False, True],\n    [False, True],\n    [False, True]]],\n  ['control: start seal stop',\n   [[{'start': True}, {}, {'stop_nc': False}, {}, {'start': True}]],\n   [[True, False], [True, False], [False, False], [False, False], [True, False]]],\n  ['control: power loss with start held',\n   [[{'start': True}, {'power': False}, {'start': True}, {}, {'start': True}]],\n   [[True, False], [False, False], [False, False], [False, False], [True, False]]],\n  ['control: overload trip and reset',\n   [[{'start': True}, {'ol_nc': False}, {}, {'start': True}, {'reset': True}, {'start': True}]],\n   [[True, False], [False, True], [False, True], [False, True], [False, False], [True, False]]],\n  ['regression: reset while overload open',\n   [[{'start': True}, {'ol_nc': False, 'reset': True}, {'start': True}]],\n   [[True, False], [False, True], [False, True]]],\n  ['control: stop and start together',\n   [[{'start': True, 'stop_nc': False}, {'start': True}, {'start': True, 'stop_nc': False}]],\n   [[False, False], [True, False], [False, False]]],\n  ['control: trip across power loss',\n   [[{'start': True}, {'ol_nc': False}, {'power': False}, {}, {'start': True}]],\n   [[True, False], [False, True], [False, True], [False, True], [False, True]]]],\n [['regression: scenario 14',\n   [[{'start': True, 'stop_nc': True},\n     {'start': True},\n     {'reset': True},\n     {},\n     {'start': True},\n     {'stop_nc': True},\n     {'stop_nc': False, 'ol_nc': False, 'reset': True},\n     {'stop_nc': False},\n     {'reset': True, 'power': False},\n     {'start': False},\n     {'start': False, 'stop_nc': True, 'reset': True}]],\n   [[True, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, True],\n    [False, False]]],\n  ['regression: scenario 16',\n   [[{'start': True},\n     {'start': True, 'reset': True},\n     {'start': True},\n     {'start': True},\n     {'start': True},\n     {'start': True, 'ol_nc': False},\n     {'start': True, 'stop_nc': True, 'reset': True},\n     {'start': False},\n     {'stop_nc': False, 'ol_nc': False},\n     {'start': True, 'stop_nc': True, 'power': False}]],\n   [[True, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [True, False],\n    [False, True],\n    [True, False],\n    [True, False],\n    [False, True],\n    [False, True]]],\n  ['control: start seal stop',\n   [[{'start': True}, {}, {'stop_nc': False}, {}, {'start': True}]],\n   [[True, False], [True, False], [False, False], [False, False], [True, False]]],\n  ['control: power loss with start held',\n   [[{'start': True}, {'power': False}, {'start': True}, {}, {'start': True}]],\n   [[True, False], [False, False], [False, False], [False, False], [True, False]]],\n  ['control: overload trip and reset',\n   [[{'start': True}, {'ol_nc': False}, {}, {'start': True}, {'reset': True}, {'start': True}]],\n   [[True, False], [False, True], [False, True], [False, True], [False, False], [True, False]]],\n  ['regression: reset while overload open',\n   [[{'start': True}, {'ol_nc': False, 'reset': True}, {'start': True}]],\n   [[True, False], [False, True], [False, True]]],\n  ['control: stop and start together',\n   [[{'start': True, 'stop_nc': False}, {'start': True}, {'start': True, 'stop_nc': False}]],\n   [[False, False], [True, False], [False, False]]],\n  ['control: trip across power loss',\n   [[{'start': True}, {'ol_nc': False}, {'power': False}, {}, {'start': True}]],\n   [[True, False], [False, True], [False, True], [False, True], [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-motor-seal-in-reset-while-overload-open","generated_at":"2026-09-29T14:51:41.678893+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 reset test is a separate if, so it clears the trip set earlier in the same scan.","sha256":"e55c2f6053ba1729b8d434ffd59df157d05e3a57cc6a6714d16c3e284eba77f7","title":"Overload reset is accepted while the overload contact is still open · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verified":true,"visibility":"public","verification":{"attempt":{"elapsed_ms":41.061,"exit_code":1,"observations":[{"actual":[[true,false],[true,false],[true,false]],"check":"regression: reset while overload open","expected":[[true,false],[false,true],[false,true]],"passed":false},{"actual":[[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],[true,false]],"passed":false},{"actual":[[true,false],[true,false],[false,false],[false,false],[true,false]],"check":"control: start seal stop","expected":[[true,false],[true,false],[false,false],[false,false],[true,false]],"passed":true},{"actual":[[true,false],[false,false],[false,false],[false,false],[true,false]],"check":"control: power loss with start held","expected":[[true,false],[false,false],[false,false],[false,false],[true,false]],"passed":true},{"actual":[[true,false],[false,true],[false,true],[false,true],[false,false],[true,false]],"check":"control: overload trip and reset","expected":[[true,false],[false,true],[false,true],[false,true],[false,false],[true,false]],"passed":true},{"actual":[[false,false],[true,false],[false,false]],"check":"control: stop and start together","expected":[[false,false],[true,false],[false,false]],"passed":true},{"actual":[[true,false],[false,true],[false,true],[false,true],[false,true]],"check":"control: trip across power loss","expected":[[true,false],[false,true],[false,true],[false,true],[false,true]],"passed":true},{"actual":[[true,false],[false,true],[false,true],[false,true],[false,true]],"check":"control: start after overload recovers","expected":[[true,false],[false,true],[false,true],[false,true],[false,true]],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"regression: reset while overload open\", \"actual\": [[true, false], [true, false], [true, false]], \"expected\": [[true, false], [false, true], [false, true]], \"passed\": false}, {\"check\": \"regression: scenario 3\", \"actual\": [[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], [true, false]], \"passed\": false}, {\"check\": \"control: start seal stop\", \"actual\": [[true, false], [true, false], [false, false], [false, false], [true, false]], \"expected\": [[true, false], [true, false], [false, false], [false, false], [true, false]], \"passed\": true}, {\"check\": \"control: power loss with start held\", \"actual\": [[true, false], [false, false], [false, false], [false, false], [true, false]], \"expected\": [[true, false], [false, false], [false, false], [false, false], [true, false]], \"passed\": true}, {\"check\": \"control: overload trip and reset\", \"actual\": [[true, false], [false, true], [false, true], [false, true], [false, false], [true, false]], \"expected\": [[true, false], [false, true], [false, true], [false, true], [false, false], [true, false]], \"passed\": true}, {\"check\": \"control: stop and start together\", \"actual\": [[false, false], [true, false], [false, false]], \"expected\": [[false, false], [true, false], [false, false]], \"passed\": true}, {\"check\": \"control: trip across power loss\", \"actual\": [[true, false], [false, true], [false, true], [false, true], [false, true]], \"expected\": [[true, false], [false, true], [false, true], [false, true], [false, true]], \"passed\": true}, {\"check\": \"control: start after overload recovers\", \"actual\": [[true, false], [false, true], [false, true], [false, true], [false, true]], \"expected\": [[true, false], [false, true], [false, true], [false, true], [false, true]], \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":40.304,"exit_code":1,"observations":[{"actual":[[true,false],[true,false],[true,false]],"check":"regression: reset while overload open","expected":[[true,false],[false,true],[false,true]],"passed":false},{"actual":[[false,true],[false,true],[false,true],[false,true],[false,true],[false,true],[true,false]],"check":"regression: scenario 3","expected":[[false,true],[false,true],[false,true],[false,true],[false,true],[false,true],[true,false]],"passed":true},{"actual":[[true,false],[true,false],[false,false],[false,false],[true,false]],"check":"control: start seal stop","expected":[[true,false],[true,false],[false,false],[false,false],[true,false]],"passed":true},{"actual":[[true,false],[false,false],[false,false],[false,false],[true,false]],"check":"control: power loss with start held","expected":[[true,false],[false,false],[false,false],[false,false],[true,false]],"passed":true},{"actual":[[true,false],[false,true],[false,true],[false,true],[false,false],[true,false]],"check":"control: overload trip and reset","expected":[[true,false],[false,true],[false,true],[false,true],[false,false],[true,false]],"passed":true},{"actual":[[false,false],[true,false],[false,false]],"check":"control: stop and start together","expected":[[false,false],[true,false],[false,false]],"passed":true},{"actual":[[true,false],[false,true],[false,true],[false,true],[false,true]],"check":"control: trip across power loss","expected":[[true,false],[false,true],[false,true],[false,true],[false,true]],"passed":true},{"actual":[[true,false],[false,true],[false,true],[false,true],[false,true]],"check":"control: start after overload recovers","expected":[[true,false],[false,true],[false,true],[false,true],[false,true]],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"regression: reset while overload open\", \"actual\": [[true, false], [true, false], [true, false]], \"expected\": [[true, false], [false, true], [false, true]], \"passed\": false}, {\"check\": \"regression: scenario 3\", \"actual\": [[false, true], [false, true], [false, true], [false, true], [false, true], [false, true], [true, false]], \"expected\": [[false, true], [false, true], [false, true], [false, true], [false, true], [false, true], [true, false]], \"passed\": true}, {\"check\": \"control: start seal stop\", \"actual\": [[true, false], [true, false], [false, false], [false, false], [true, false]], \"expected\": [[true, false], [true, false], [false, false], [false, false], [true, false]], \"passed\": true}, {\"check\": \"control: power loss with start held\", \"actual\": [[true, false], [false, false], [false, false], [false, false], [true, false]], \"expected\": [[true, false], [false, false], [false, false], [false, false], [true, false]], \"passed\": true}, {\"check\": \"control: overload trip and reset\", \"actual\": [[true, false], [false, true], [false, true], [false, true], [false, false], [true, false]], \"expected\": [[true, false], [false, true], [false, true], [false, true], [false, false], [true, false]], \"passed\": true}, {\"check\": \"control: stop and start together\", \"actual\": [[false, false], [true, false], [false, false]], \"expected\": [[false, false], [true, false], [false, false]], \"passed\": true}, {\"check\": \"control: trip across power loss\", \"actual\": [[true, false], [false, true], [false, true], [false, true], [false, true]], \"expected\": [[true, false], [false, true], [false, true], [false, true], [false, true]], \"passed\": true}, {\"check\": \"control: start after overload recovers\", \"actual\": [[true, false], [false, true], [false, true], [false, true], [false, true]], \"expected\": [[true, false], [false, true], [false, true], [false, true], [false, true]], \"passed\": true}], \"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."}}