{"abstract":"After the delay completes the ACC value keeps growing on every true scan instead of holding at PRE.","category":"PLC ladder logic scan cycles","checks":8,"contract":"On-delay timer (TON) evaluated once per scan. scans is a list of [rung_in, elapsed_ms since the previous scan]. The accumulator starts on the false-to-true scan without crediting that scan's elapsed time, then adds each later true scan's elapsed time, clamped at preset. A false rung resets the accumulator. DN is rung_in and acc >= preset; TT is rung_in and not DN. Return [DN, TT, ACC] per scan.","contract_signature":"preset, scans","evaluation_group":"w2-plc-ladder-logic-scan-cycles-ton-on-delay","failed_approach":"Clamping before the addition still leaves ACC one scan interval above PRE.","family":"w2-plc-ladder-logic-scan-cycles-ton-on-delay-accumulator-clamp","id":"FA-91846","implementations":{"attempt":{"sha256":"46a1e7272609cb364afd8014a929f7b7acbfb657ec1bad828a3eb726c3213a16","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(preset, scans):\n    acc = 0\n    prev = False\n    out = []\n    for rung_in, dt in scans:\n        rung_in = bool(rung_in)\n        if rung_in and prev:\n            acc = min(preset, acc) + dt\n        elif not rung_in:\n            acc = 0\n        dn = rung_in and acc >= preset\n        tt = rung_in and not dn\n        prev = rung_in\n        out.append([dn, tt, acc])\n    return out\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[['regression: preset reached exactly',\n   [100, [[True, 30], [True, 50], [True, 50], [True, 10]]],\n   [[False, True, 0], [False, True, 50], [True, False, 100], [True, False, 100]]],\n  ['regression: interrupted timing restarts',\n   [60, [[True, 40], [True, 40], [False, 40], [True, 40], [True, 40], [True, 40]]],\n   [[False, True, 0],\n    [False, True, 40],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 40],\n    [True, False, 60]]],\n  ['control: zero preset',\n   [0, [[False, 10], [True, 10], [False, 5], [True, 40]]],\n   [[False, False, 0], [True, False, 0], [False, False, 0], [True, False, 0]]],\n  ['regression: long hold after done',\n   [50, [[True, 30], [True, 30], [True, 30], [True, 30], [False, 30]]],\n   [[False, True, 0], [False, True, 30], [True, False, 50], [True, False, 50], [False, False, 0]]],\n  ['regression: scenario 1',\n   [30, [[True, 40], [False, 75], [True, 60], [False, 25], [False, 10], [True, 60], [True, 25], [True, 40]]],\n   [[False, True, 0],\n    [False, False, 0],\n    [False, True, 0],\n    [False, False, 0],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 25],\n    [True, False, 30]]],\n  ['regression: scenario 2',\n   [30, [[False, 25], [True, 50], [True, 0], [True, 0], [True, 25], [True, 75], [True, 75]]],\n   [[False, False, 0],\n    [False, True, 0],\n    [False, True, 0],\n    [False, True, 0],\n    [False, True, 25],\n    [True, False, 30],\n    [True, False, 30]]],\n  ['control: scenario 3',\n   [120, [[True, 25], [True, 20], [False, 75], [True, 75], [True, 0], [False, 10], [True, 25]]],\n   [[False, True, 0],\n    [False, True, 20],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 0],\n    [False, False, 0],\n    [False, True, 0]]],\n  ['regression: scenario 4',\n   [0,\n    [[True, 10],\n     [False, 25],\n     [True, 25],\n     [True, 20],\n     [True, 40],\n     [True, 20],\n     [True, 75],\n     [True, 0],\n     [True, 10]]],\n   [[True, False, 0],\n    [False, False, 0],\n    [True, False, 0],\n    [True, False, 0],\n    [True, False, 0],\n    [True, False, 0],\n    [True, False, 0],\n    [True, False, 0],\n    [True, False, 0]]]],\n [['regression: interrupted timing restarts',\n   [60, [[True, 40], [True, 40], [False, 40], [True, 40], [True, 40], [True, 40]]],\n   [[False, True, 0],\n    [False, True, 40],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 40],\n    [True, False, 60]]],\n  ['regression: long hold after done',\n   [50, [[True, 30], [True, 30], [True, 30], [True, 30], [False, 30]]],\n   [[False, True, 0], [False, True, 30], [True, False, 50], [True, False, 50], [False, False, 0]]],\n  ['regression: preset reached exactly',\n   [100, [[True, 30], [True, 50], [True, 50], [True, 10]]],\n   [[False, True, 0], [False, True, 50], [True, False, 100], [True, False, 100]]],\n  ['control: zero preset',\n   [0, [[False, 10], [True, 10], [False, 5], [True, 40]]],\n   [[False, False, 0], [True, False, 0], [False, False, 0], [True, False, 0]]],\n  ['regression: scenario 1',\n   [0,\n    [[True, 40],\n     [True, 10],\n     [True, 10],\n     [False, 10],\n     [True, 20],\n     [True, 25],\n     [True, 20],\n     [False, 25],\n     [True, 20]]],\n   [[True, False, 0],\n    [True, False, 0],\n    [True, False, 0],\n    [False, False, 0],\n    [True, False, 0],\n    [True, False, 0],\n    [True, False, 0],\n    [False, False, 0],\n    [True, False, 0]]],\n  ['control: scenario 2',\n   [150,\n    [[True, 60],\n     [True, 10],\n     [False, 20],\n     [False, 40],\n     [True, 50],\n     [True, 25],\n     [False, 25],\n     [False, 75],\n     [True, 25],\n     [False, 0],\n     [True, 60],\n     [False, 10]]],\n   [[False, True, 0],\n    [False, True, 10],\n    [False, False, 0],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 25],\n    [False, False, 0],\n    [False, False, 0],\n    [False, True, 0],\n    [False, False, 0],\n    [False, True, 0],\n    [False, False, 0]]],\n  ['regression: scenario 3',\n   [50,\n    [[False, 50],\n     [True, 75],\n     [True, 75],\n     [True, 20],\n     [True, 75],\n     [True, 0],\n     [False, 60],\n     [True, 25],\n     [False, 10]]],\n   [[False, False, 0],\n    [False, True, 0],\n    [True, False, 50],\n    [True, False, 50],\n    [True, False, 50],\n    [True, False, 50],\n    [False, False, 0],\n    [False, True, 0],\n    [False, False, 0]]],\n  ['regression: scenario 4',\n   [120,\n    [[True, 75],\n     [False, 60],\n     [True, 20],\n     [True, 25],\n     [False, 40],\n     [False, 40],\n     [True, 50],\n     [True, 60],\n     [True, 75],\n     [True, 40],\n     [True, 0]]],\n   [[False, True, 0],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 25],\n    [False, False, 0],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 60],\n    [True, False, 120],\n    [True, False, 120],\n    [True, False, 120]]]],\n [['regression: long hold after done',\n   [50, [[True, 30], [True, 30], [True, 30], [True, 30], [False, 30]]],\n   [[False, True, 0], [False, True, 30], [True, False, 50], [True, False, 50], [False, False, 0]]],\n  ['regression: scenario 1',\n   [50,\n    [[True, 75],\n     [True, 40],\n     [True, 60],\n     [True, 0],\n     [True, 25],\n     [False, 50],\n     [False, 75],\n     [True, 60],\n     [True, 20],\n     [True, 60],\n     [False, 60],\n     [True, 75]]],\n   [[False, True, 0],\n    [False, True, 40],\n    [True, False, 50],\n    [True, False, 50],\n    [True, False, 50],\n    [False, False, 0],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 20],\n    [True, False, 50],\n    [False, False, 0],\n    [False, True, 0]]],\n  ['regression: preset reached exactly',\n   [100, [[True, 30], [True, 50], [True, 50], [True, 10]]],\n   [[False, True, 0], [False, True, 50], [True, False, 100], [True, False, 100]]],\n  ['control: zero preset',\n   [0, [[False, 10], [True, 10], [False, 5], [True, 40]]],\n   [[False, False, 0], [True, False, 0], [False, False, 0], [True, False, 0]]],\n  ['regression: interrupted timing restarts',\n   [60, [[True, 40], [True, 40], [False, 40], [True, 40], [True, 40], [True, 40]]],\n   [[False, True, 0],\n    [False, True, 40],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 40],\n    [True, False, 60]]],\n  ['control: scenario 2',\n   [120, [[False, 0], [False, 75], [True, 75], [True, 0], [True, 0], [False, 75], [True, 60], [True, 40]]],\n   [[False, False, 0],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 0],\n    [False, True, 0],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 40]]],\n  ['control: scenario 3',\n   [50,\n    [[True, 40],\n     [False, 0],\n     [True, 60],\n     [True, 0],\n     [True, 40],\n     [True, 0],\n     [True, 0],\n     [False, 0],\n     [False, 50],\n     [False, 60],\n     [False, 10],\n     [True, 60]]],\n   [[False, True, 0],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 0],\n    [False, True, 40],\n    [False, True, 40],\n    [False, True, 40],\n    [False, False, 0],\n    [False, False, 0],\n    [False, False, 0],\n    [False, False, 0],\n    [False, True, 0]]],\n  ['control: scenario 4',\n   [100, [[False, 60], [False, 20], [True, 75], [False, 25], [True, 60], [False, 25], [True, 40]]],\n   [[False, False, 0],\n    [False, False, 0],\n    [False, True, 0],\n    [False, False, 0],\n    [False, True, 0],\n    [False, False, 0],\n    [False, True, 0]]]],\n [['regression: scenario 1',\n   [0,\n    [[True, 10],\n     [True, 0],\n     [False, 50],\n     [True, 40],\n     [False, 20],\n     [False, 25],\n     [True, 50],\n     [True, 60],\n     [True, 40]]],\n   [[True, False, 0],\n    [True, False, 0],\n    [False, False, 0],\n    [True, False, 0],\n    [False, False, 0],\n    [False, False, 0],\n    [True, False, 0],\n    [True, False, 0],\n    [True, False, 0]]],\n  ['regression: scenario 3',\n   [120,\n    [[True, 60],\n     [True, 10],\n     [False, 10],\n     [True, 50],\n     [True, 20],\n     [True, 25],\n     [True, 25],\n     [False, 75],\n     [True, 40],\n     [True, 50],\n     [True, 75],\n     [True, 0]]],\n   [[False, True, 0],\n    [False, True, 10],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 20],\n    [False, True, 45],\n    [False, True, 70],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 50],\n    [True, False, 120],\n    [True, False, 120]]],\n  ['regression: preset reached exactly',\n   [100, [[True, 30], [True, 50], [True, 50], [True, 10]]],\n   [[False, True, 0], [False, True, 50], [True, False, 100], [True, False, 100]]],\n  ['control: zero preset',\n   [0, [[False, 10], [True, 10], [False, 5], [True, 40]]],\n   [[False, False, 0], [True, False, 0], [False, False, 0], [True, False, 0]]],\n  ['regression: interrupted timing restarts',\n   [60, [[True, 40], [True, 40], [False, 40], [True, 40], [True, 40], [True, 40]]],\n   [[False, True, 0],\n    [False, True, 40],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 40],\n    [True, False, 60]]],\n  ['regression: long hold after done',\n   [50, [[True, 30], [True, 30], [True, 30], [True, 30], [False, 30]]],\n   [[False, True, 0], [False, True, 30], [True, False, 50], [True, False, 50], [False, False, 0]]],\n  ['control: scenario 2',\n   [100, [[False, 50], [True, 50], [True, 20], [False, 50], [True, 40], [True, 10], [False, 10]]],\n   [[False, False, 0],\n    [False, True, 0],\n    [False, True, 20],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 10],\n    [False, False, 0]]],\n  ['control: scenario 4',\n   [0, [[True, 25], [False, 75], [True, 20], [False, 25], [True, 20], [False, 25], [True, 40]]],\n   [[True, False, 0],\n    [False, False, 0],\n    [True, False, 0],\n    [False, False, 0],\n    [True, False, 0],\n    [False, False, 0],\n    [True, False, 0]]]],\n [['regression: scenario 4',\n   [100,\n    [[False, 60],\n     [False, 0],\n     [True, 50],\n     [True, 20],\n     [True, 60],\n     [True, 20],\n     [True, 50],\n     [True, 0],\n     [True, 20],\n     [True, 0],\n     [True, 20],\n     [True, 25]]],\n   [[False, False, 0],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 20],\n    [False, True, 80],\n    [True, False, 100],\n    [True, False, 100],\n    [True, False, 100],\n    [True, False, 100],\n    [True, False, 100],\n    [True, False, 100],\n    [True, False, 100]]],\n  ['regression: scenario 5',\n   [100,\n    [[True, 20],\n     [True, 40],\n     [True, 20],\n     [True, 75],\n     [True, 50],\n     [True, 75],\n     [True, 0],\n     [True, 25],\n     [False, 50],\n     [False, 0],\n     [False, 40]]],\n   [[False, True, 0],\n    [False, True, 40],\n    [False, True, 60],\n    [True, False, 100],\n    [True, False, 100],\n    [True, False, 100],\n    [True, False, 100],\n    [True, False, 100],\n    [False, False, 0],\n    [False, False, 0],\n    [False, False, 0]]],\n  ['regression: preset reached exactly',\n   [100, [[True, 30], [True, 50], [True, 50], [True, 10]]],\n   [[False, True, 0], [False, True, 50], [True, False, 100], [True, False, 100]]],\n  ['control: zero preset',\n   [0, [[False, 10], [True, 10], [False, 5], [True, 40]]],\n   [[False, False, 0], [True, False, 0], [False, False, 0], [True, False, 0]]],\n  ['regression: interrupted timing restarts',\n   [60, [[True, 40], [True, 40], [False, 40], [True, 40], [True, 40], [True, 40]]],\n   [[False, True, 0],\n    [False, True, 40],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 40],\n    [True, False, 60]]],\n  ['regression: long hold after done',\n   [50, [[True, 30], [True, 30], [True, 30], [True, 30], [False, 30]]],\n   [[False, True, 0], [False, True, 30], [True, False, 50], [True, False, 50], [False, False, 0]]],\n  ['regression: scenario 1',\n   [120,\n    [[True, 0],\n     [True, 50],\n     [True, 50],\n     [True, 75],\n     [True, 75],\n     [False, 40],\n     [True, 25],\n     [False, 0],\n     [False, 10],\n     [True, 25],\n     [False, 0]]],\n   [[False, True, 0],\n    [False, True, 50],\n    [False, True, 100],\n    [True, False, 120],\n    [True, False, 120],\n    [False, False, 0],\n    [False, True, 0],\n    [False, False, 0],\n    [False, False, 0],\n    [False, True, 0],\n    [False, False, 0]]],\n  ['control: scenario 2',\n   [150, [[True, 50], [False, 40], [True, 20], [True, 20], [True, 10], [True, 40], [False, 50]]],\n   [[False, True, 0],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 20],\n    [False, True, 30],\n    [False, True, 70],\n    [False, False, 0]]]]]\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":"8481474a498c4f2693f06a681bd68f680f6317659dd6d156a34e9227991a6141","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(preset, scans):\n    acc = 0\n    prev = False\n    out = []\n    for rung_in, dt in scans:\n        rung_in = bool(rung_in)\n        if rung_in and prev:\n            acc = acc + dt\n        elif not rung_in:\n            acc = 0\n        dn = rung_in and acc >= preset\n        tt = rung_in and not dn\n        prev = rung_in\n        out.append([dn, tt, acc])\n    return out\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[['regression: preset reached exactly',\n   [100, [[True, 30], [True, 50], [True, 50], [True, 10]]],\n   [[False, True, 0], [False, True, 50], [True, False, 100], [True, False, 100]]],\n  ['regression: interrupted timing restarts',\n   [60, [[True, 40], [True, 40], [False, 40], [True, 40], [True, 40], [True, 40]]],\n   [[False, True, 0],\n    [False, True, 40],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 40],\n    [True, False, 60]]],\n  ['control: zero preset',\n   [0, [[False, 10], [True, 10], [False, 5], [True, 40]]],\n   [[False, False, 0], [True, False, 0], [False, False, 0], [True, False, 0]]],\n  ['regression: long hold after done',\n   [50, [[True, 30], [True, 30], [True, 30], [True, 30], [False, 30]]],\n   [[False, True, 0], [False, True, 30], [True, False, 50], [True, False, 50], [False, False, 0]]],\n  ['regression: scenario 1',\n   [30, [[True, 40], [False, 75], [True, 60], [False, 25], [False, 10], [True, 60], [True, 25], [True, 40]]],\n   [[False, True, 0],\n    [False, False, 0],\n    [False, True, 0],\n    [False, False, 0],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 25],\n    [True, False, 30]]],\n  ['regression: scenario 2',\n   [30, [[False, 25], [True, 50], [True, 0], [True, 0], [True, 25], [True, 75], [True, 75]]],\n   [[False, False, 0],\n    [False, True, 0],\n    [False, True, 0],\n    [False, True, 0],\n    [False, True, 25],\n    [True, False, 30],\n    [True, False, 30]]],\n  ['control: scenario 3',\n   [120, [[True, 25], [True, 20], [False, 75], [True, 75], [True, 0], [False, 10], [True, 25]]],\n   [[False, True, 0],\n    [False, True, 20],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 0],\n    [False, False, 0],\n    [False, True, 0]]],\n  ['regression: scenario 4',\n   [0,\n    [[True, 10],\n     [False, 25],\n     [True, 25],\n     [True, 20],\n     [True, 40],\n     [True, 20],\n     [True, 75],\n     [True, 0],\n     [True, 10]]],\n   [[True, False, 0],\n    [False, False, 0],\n    [True, False, 0],\n    [True, False, 0],\n    [True, False, 0],\n    [True, False, 0],\n    [True, False, 0],\n    [True, False, 0],\n    [True, False, 0]]]],\n [['regression: interrupted timing restarts',\n   [60, [[True, 40], [True, 40], [False, 40], [True, 40], [True, 40], [True, 40]]],\n   [[False, True, 0],\n    [False, True, 40],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 40],\n    [True, False, 60]]],\n  ['regression: long hold after done',\n   [50, [[True, 30], [True, 30], [True, 30], [True, 30], [False, 30]]],\n   [[False, True, 0], [False, True, 30], [True, False, 50], [True, False, 50], [False, False, 0]]],\n  ['regression: preset reached exactly',\n   [100, [[True, 30], [True, 50], [True, 50], [True, 10]]],\n   [[False, True, 0], [False, True, 50], [True, False, 100], [True, False, 100]]],\n  ['control: zero preset',\n   [0, [[False, 10], [True, 10], [False, 5], [True, 40]]],\n   [[False, False, 0], [True, False, 0], [False, False, 0], [True, False, 0]]],\n  ['regression: scenario 1',\n   [0,\n    [[True, 40],\n     [True, 10],\n     [True, 10],\n     [False, 10],\n     [True, 20],\n     [True, 25],\n     [True, 20],\n     [False, 25],\n     [True, 20]]],\n   [[True, False, 0],\n    [True, False, 0],\n    [True, False, 0],\n    [False, False, 0],\n    [True, False, 0],\n    [True, False, 0],\n    [True, False, 0],\n    [False, False, 0],\n    [True, False, 0]]],\n  ['control: scenario 2',\n   [150,\n    [[True, 60],\n     [True, 10],\n     [False, 20],\n     [False, 40],\n     [True, 50],\n     [True, 25],\n     [False, 25],\n     [False, 75],\n     [True, 25],\n     [False, 0],\n     [True, 60],\n     [False, 10]]],\n   [[False, True, 0],\n    [False, True, 10],\n    [False, False, 0],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 25],\n    [False, False, 0],\n    [False, False, 0],\n    [False, True, 0],\n    [False, False, 0],\n    [False, True, 0],\n    [False, False, 0]]],\n  ['regression: scenario 3',\n   [50,\n    [[False, 50],\n     [True, 75],\n     [True, 75],\n     [True, 20],\n     [True, 75],\n     [True, 0],\n     [False, 60],\n     [True, 25],\n     [False, 10]]],\n   [[False, False, 0],\n    [False, True, 0],\n    [True, False, 50],\n    [True, False, 50],\n    [True, False, 50],\n    [True, False, 50],\n    [False, False, 0],\n    [False, True, 0],\n    [False, False, 0]]],\n  ['regression: scenario 4',\n   [120,\n    [[True, 75],\n     [False, 60],\n     [True, 20],\n     [True, 25],\n     [False, 40],\n     [False, 40],\n     [True, 50],\n     [True, 60],\n     [True, 75],\n     [True, 40],\n     [True, 0]]],\n   [[False, True, 0],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 25],\n    [False, False, 0],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 60],\n    [True, False, 120],\n    [True, False, 120],\n    [True, False, 120]]]],\n [['regression: long hold after done',\n   [50, [[True, 30], [True, 30], [True, 30], [True, 30], [False, 30]]],\n   [[False, True, 0], [False, True, 30], [True, False, 50], [True, False, 50], [False, False, 0]]],\n  ['regression: scenario 1',\n   [50,\n    [[True, 75],\n     [True, 40],\n     [True, 60],\n     [True, 0],\n     [True, 25],\n     [False, 50],\n     [False, 75],\n     [True, 60],\n     [True, 20],\n     [True, 60],\n     [False, 60],\n     [True, 75]]],\n   [[False, True, 0],\n    [False, True, 40],\n    [True, False, 50],\n    [True, False, 50],\n    [True, False, 50],\n    [False, False, 0],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 20],\n    [True, False, 50],\n    [False, False, 0],\n    [False, True, 0]]],\n  ['regression: preset reached exactly',\n   [100, [[True, 30], [True, 50], [True, 50], [True, 10]]],\n   [[False, True, 0], [False, True, 50], [True, False, 100], [True, False, 100]]],\n  ['control: zero preset',\n   [0, [[False, 10], [True, 10], [False, 5], [True, 40]]],\n   [[False, False, 0], [True, False, 0], [False, False, 0], [True, False, 0]]],\n  ['regression: interrupted timing restarts',\n   [60, [[True, 40], [True, 40], [False, 40], [True, 40], [True, 40], [True, 40]]],\n   [[False, True, 0],\n    [False, True, 40],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 40],\n    [True, False, 60]]],\n  ['control: scenario 2',\n   [120, [[False, 0], [False, 75], [True, 75], [True, 0], [True, 0], [False, 75], [True, 60], [True, 40]]],\n   [[False, False, 0],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 0],\n    [False, True, 0],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 40]]],\n  ['control: scenario 3',\n   [50,\n    [[True, 40],\n     [False, 0],\n     [True, 60],\n     [True, 0],\n     [True, 40],\n     [True, 0],\n     [True, 0],\n     [False, 0],\n     [False, 50],\n     [False, 60],\n     [False, 10],\n     [True, 60]]],\n   [[False, True, 0],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 0],\n    [False, True, 40],\n    [False, True, 40],\n    [False, True, 40],\n    [False, False, 0],\n    [False, False, 0],\n    [False, False, 0],\n    [False, False, 0],\n    [False, True, 0]]],\n  ['control: scenario 4',\n   [100, [[False, 60], [False, 20], [True, 75], [False, 25], [True, 60], [False, 25], [True, 40]]],\n   [[False, False, 0],\n    [False, False, 0],\n    [False, True, 0],\n    [False, False, 0],\n    [False, True, 0],\n    [False, False, 0],\n    [False, True, 0]]]],\n [['regression: scenario 1',\n   [0,\n    [[True, 10],\n     [True, 0],\n     [False, 50],\n     [True, 40],\n     [False, 20],\n     [False, 25],\n     [True, 50],\n     [True, 60],\n     [True, 40]]],\n   [[True, False, 0],\n    [True, False, 0],\n    [False, False, 0],\n    [True, False, 0],\n    [False, False, 0],\n    [False, False, 0],\n    [True, False, 0],\n    [True, False, 0],\n    [True, False, 0]]],\n  ['regression: scenario 3',\n   [120,\n    [[True, 60],\n     [True, 10],\n     [False, 10],\n     [True, 50],\n     [True, 20],\n     [True, 25],\n     [True, 25],\n     [False, 75],\n     [True, 40],\n     [True, 50],\n     [True, 75],\n     [True, 0]]],\n   [[False, True, 0],\n    [False, True, 10],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 20],\n    [False, True, 45],\n    [False, True, 70],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 50],\n    [True, False, 120],\n    [True, False, 120]]],\n  ['regression: preset reached exactly',\n   [100, [[True, 30], [True, 50], [True, 50], [True, 10]]],\n   [[False, True, 0], [False, True, 50], [True, False, 100], [True, False, 100]]],\n  ['control: zero preset',\n   [0, [[False, 10], [True, 10], [False, 5], [True, 40]]],\n   [[False, False, 0], [True, False, 0], [False, False, 0], [True, False, 0]]],\n  ['regression: interrupted timing restarts',\n   [60, [[True, 40], [True, 40], [False, 40], [True, 40], [True, 40], [True, 40]]],\n   [[False, True, 0],\n    [False, True, 40],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 40],\n    [True, False, 60]]],\n  ['regression: long hold after done',\n   [50, [[True, 30], [True, 30], [True, 30], [True, 30], [False, 30]]],\n   [[False, True, 0], [False, True, 30], [True, False, 50], [True, False, 50], [False, False, 0]]],\n  ['control: scenario 2',\n   [100, [[False, 50], [True, 50], [True, 20], [False, 50], [True, 40], [True, 10], [False, 10]]],\n   [[False, False, 0],\n    [False, True, 0],\n    [False, True, 20],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 10],\n    [False, False, 0]]],\n  ['control: scenario 4',\n   [0, [[True, 25], [False, 75], [True, 20], [False, 25], [True, 20], [False, 25], [True, 40]]],\n   [[True, False, 0],\n    [False, False, 0],\n    [True, False, 0],\n    [False, False, 0],\n    [True, False, 0],\n    [False, False, 0],\n    [True, False, 0]]]],\n [['regression: scenario 4',\n   [100,\n    [[False, 60],\n     [False, 0],\n     [True, 50],\n     [True, 20],\n     [True, 60],\n     [True, 20],\n     [True, 50],\n     [True, 0],\n     [True, 20],\n     [True, 0],\n     [True, 20],\n     [True, 25]]],\n   [[False, False, 0],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 20],\n    [False, True, 80],\n    [True, False, 100],\n    [True, False, 100],\n    [True, False, 100],\n    [True, False, 100],\n    [True, False, 100],\n    [True, False, 100],\n    [True, False, 100]]],\n  ['regression: scenario 5',\n   [100,\n    [[True, 20],\n     [True, 40],\n     [True, 20],\n     [True, 75],\n     [True, 50],\n     [True, 75],\n     [True, 0],\n     [True, 25],\n     [False, 50],\n     [False, 0],\n     [False, 40]]],\n   [[False, True, 0],\n    [False, True, 40],\n    [False, True, 60],\n    [True, False, 100],\n    [True, False, 100],\n    [True, False, 100],\n    [True, False, 100],\n    [True, False, 100],\n    [False, False, 0],\n    [False, False, 0],\n    [False, False, 0]]],\n  ['regression: preset reached exactly',\n   [100, [[True, 30], [True, 50], [True, 50], [True, 10]]],\n   [[False, True, 0], [False, True, 50], [True, False, 100], [True, False, 100]]],\n  ['control: zero preset',\n   [0, [[False, 10], [True, 10], [False, 5], [True, 40]]],\n   [[False, False, 0], [True, False, 0], [False, False, 0], [True, False, 0]]],\n  ['regression: interrupted timing restarts',\n   [60, [[True, 40], [True, 40], [False, 40], [True, 40], [True, 40], [True, 40]]],\n   [[False, True, 0],\n    [False, True, 40],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 40],\n    [True, False, 60]]],\n  ['regression: long hold after done',\n   [50, [[True, 30], [True, 30], [True, 30], [True, 30], [False, 30]]],\n   [[False, True, 0], [False, True, 30], [True, False, 50], [True, False, 50], [False, False, 0]]],\n  ['regression: scenario 1',\n   [120,\n    [[True, 0],\n     [True, 50],\n     [True, 50],\n     [True, 75],\n     [True, 75],\n     [False, 40],\n     [True, 25],\n     [False, 0],\n     [False, 10],\n     [True, 25],\n     [False, 0]]],\n   [[False, True, 0],\n    [False, True, 50],\n    [False, True, 100],\n    [True, False, 120],\n    [True, False, 120],\n    [False, False, 0],\n    [False, True, 0],\n    [False, False, 0],\n    [False, False, 0],\n    [False, True, 0],\n    [False, False, 0]]],\n  ['control: scenario 2',\n   [150, [[True, 50], [False, 40], [True, 20], [True, 20], [True, 10], [True, 40], [False, 50]]],\n   [[False, True, 0],\n    [False, False, 0],\n    [False, True, 0],\n    [False, True, 20],\n    [False, True, 30],\n    [False, True, 70],\n    [False, False, 0]]]]]\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-ton-on-delay-accumulator-clamp","generated_at":"2026-09-29T14:51:39.773639+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 accumulator addition is not limited to the preset.","sha256":"5efc3b56751ec16086334d3e7f606ef76dacd9ca659f465976f5aac3b89f9f6f","title":"TON accumulator runs past its preset · 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":42.94,"exit_code":1,"observations":[{"actual":[[false,true,0],[false,true,50],[true,false,100],[true,false,110]],"check":"regression: preset reached exactly","expected":[[false,true,0],[false,true,50],[true,false,100],[true,false,100]],"passed":false},{"actual":[[false,true,0],[false,true,40],[false,false,0],[false,true,0],[false,true,40],[true,false,80]],"check":"regression: interrupted timing restarts","expected":[[false,true,0],[false,true,40],[false,false,0],[false,true,0],[false,true,40],[true,false,60]],"passed":false},{"actual":[[false,false,0],[true,false,0],[false,false,0],[true,false,0]],"check":"control: zero preset","expected":[[false,false,0],[true,false,0],[false,false,0],[true,false,0]],"passed":true},{"actual":[[false,true,0],[false,true,30],[true,false,60],[true,false,80],[false,false,0]],"check":"regression: long hold after done","expected":[[false,true,0],[false,true,30],[true,false,50],[true,false,50],[false,false,0]],"passed":false},{"actual":[[false,true,0],[false,false,0],[false,true,0],[false,false,0],[false,false,0],[false,true,0],[false,true,25],[true,false,65]],"check":"regression: scenario 1","expected":[[false,true,0],[false,false,0],[false,true,0],[false,false,0],[false,false,0],[false,true,0],[false,true,25],[true,false,30]],"passed":false},{"actual":[[false,false,0],[false,true,0],[false,true,0],[false,true,0],[false,true,25],[true,false,100],[true,false,105]],"check":"regression: scenario 2","expected":[[false,false,0],[false,true,0],[false,true,0],[false,true,0],[false,true,25],[true,false,30],[true,false,30]],"passed":false},{"actual":[[false,true,0],[false,true,20],[false,false,0],[false,true,0],[false,true,0],[false,false,0],[false,true,0]],"check":"control: scenario 3","expected":[[false,true,0],[false,true,20],[false,false,0],[false,true,0],[false,true,0],[false,false,0],[false,true,0]],"passed":true},{"actual":[[true,false,0],[false,false,0],[true,false,0],[true,false,20],[true,false,40],[true,false,20],[true,false,75],[true,false,0],[true,false,10]],"check":"regression: scenario 4","expected":[[true,false,0],[false,false,0],[true,false,0],[true,false,0],[true,false,0],[true,false,0],[true,false,0],[true,false,0],[true,false,0]],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"regression: preset reached exactly\", \"actual\": [[false, true, 0], [false, true, 50], [true, false, 100], [true, false, 110]], \"expected\": [[false, true, 0], [false, true, 50], [true, false, 100], [true, false, 100]], \"passed\": false}, {\"check\": \"regression: interrupted timing restarts\", \"actual\": [[false, true, 0], [false, true, 40], [false, false, 0], [false, true, 0], [false, true, 40], [true, false, 80]], \"expected\": [[false, true, 0], [false, true, 40], [false, false, 0], [false, true, 0], [false, true, 40], [true, false, 60]], \"passed\": false}, {\"check\": \"control: zero preset\", \"actual\": [[false, false, 0], [true, false, 0], [false, false, 0], [true, false, 0]], \"expected\": [[false, false, 0], [true, false, 0], [false, false, 0], [true, false, 0]], \"passed\": true}, {\"check\": \"regression: long hold after done\", \"actual\": [[false, true, 0], [false, true, 30], [true, false, 60], [true, false, 80], [false, false, 0]], \"expected\": [[false, true, 0], [false, true, 30], [true, false, 50], [true, false, 50], [false, false, 0]], \"passed\": false}, {\"check\": \"regression: scenario 1\", \"actual\": [[false, true, 0], [false, false, 0], [false, true, 0], [false, false, 0], [false, false, 0], [false, true, 0], [false, true, 25], [true, false, 65]], \"expected\": [[false, true, 0], [false, false, 0], [false, true, 0], [false, false, 0], [false, false, 0], [false, true, 0], [false, true, 25], [true, false, 30]], \"passed\": false}, {\"check\": \"regression: scenario 2\", \"actual\": [[false, false, 0], [false, true, 0], [false, true, 0], [false, true, 0], [false, true, 25], [true, false, 100], [true, false, 105]], \"expected\": [[false, false, 0], [false, true, 0], [false, true, 0], [false, true, 0], [false, true, 25], [true, false, 30], [true, false, 30]], \"passed\": false}, {\"check\": \"control: scenario 3\", \"actual\": [[false, true, 0], [false, true, 20], [false, false, 0], [false, true, 0], [false, true, 0], [false, false, 0], [false, true, 0]], \"expected\": [[false, true, 0], [false, true, 20], [false, false, 0], [false, true, 0], [false, true, 0], [false, false, 0], [false, true, 0]], \"passed\": true}, {\"check\": \"regression: scenario 4\", \"actual\": [[true, false, 0], [false, false, 0], [true, false, 0], [true, false, 20], [true, false, 40], [true, false, 20], [true, false, 75], [true, false, 0], [true, false, 10]], \"expected\": [[true, false, 0], [false, false, 0], [true, false, 0], [true, false, 0], [true, false, 0], [true, false, 0], [true, false, 0], [true, false, 0], [true, false, 0]], \"passed\": false}], \"passed\": false}\n"},"broken":{"elapsed_ms":44.992,"exit_code":1,"observations":[{"actual":[[false,true,0],[false,true,50],[true,false,100],[true,false,110]],"check":"regression: preset reached exactly","expected":[[false,true,0],[false,true,50],[true,false,100],[true,false,100]],"passed":false},{"actual":[[false,true,0],[false,true,40],[false,false,0],[false,true,0],[false,true,40],[true,false,80]],"check":"regression: interrupted timing restarts","expected":[[false,true,0],[false,true,40],[false,false,0],[false,true,0],[false,true,40],[true,false,60]],"passed":false},{"actual":[[false,false,0],[true,false,0],[false,false,0],[true,false,0]],"check":"control: zero preset","expected":[[false,false,0],[true,false,0],[false,false,0],[true,false,0]],"passed":true},{"actual":[[false,true,0],[false,true,30],[true,false,60],[true,false,90],[false,false,0]],"check":"regression: long hold after done","expected":[[false,true,0],[false,true,30],[true,false,50],[true,false,50],[false,false,0]],"passed":false},{"actual":[[false,true,0],[false,false,0],[false,true,0],[false,false,0],[false,false,0],[false,true,0],[false,true,25],[true,false,65]],"check":"regression: scenario 1","expected":[[false,true,0],[false,false,0],[false,true,0],[false,false,0],[false,false,0],[false,true,0],[false,true,25],[true,false,30]],"passed":false},{"actual":[[false,false,0],[false,true,0],[false,true,0],[false,true,0],[false,true,25],[true,false,100],[true,false,175]],"check":"regression: scenario 2","expected":[[false,false,0],[false,true,0],[false,true,0],[false,true,0],[false,true,25],[true,false,30],[true,false,30]],"passed":false},{"actual":[[false,true,0],[false,true,20],[false,false,0],[false,true,0],[false,true,0],[false,false,0],[false,true,0]],"check":"control: scenario 3","expected":[[false,true,0],[false,true,20],[false,false,0],[false,true,0],[false,true,0],[false,false,0],[false,true,0]],"passed":true},{"actual":[[true,false,0],[false,false,0],[true,false,0],[true,false,20],[true,false,60],[true,false,80],[true,false,155],[true,false,155],[true,false,165]],"check":"regression: scenario 4","expected":[[true,false,0],[false,false,0],[true,false,0],[true,false,0],[true,false,0],[true,false,0],[true,false,0],[true,false,0],[true,false,0]],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"regression: preset reached exactly\", \"actual\": [[false, true, 0], [false, true, 50], [true, false, 100], [true, false, 110]], \"expected\": [[false, true, 0], [false, true, 50], [true, false, 100], [true, false, 100]], \"passed\": false}, {\"check\": \"regression: interrupted timing restarts\", \"actual\": [[false, true, 0], [false, true, 40], [false, false, 0], [false, true, 0], [false, true, 40], [true, false, 80]], \"expected\": [[false, true, 0], [false, true, 40], [false, false, 0], [false, true, 0], [false, true, 40], [true, false, 60]], \"passed\": false}, {\"check\": \"control: zero preset\", \"actual\": [[false, false, 0], [true, false, 0], [false, false, 0], [true, false, 0]], \"expected\": [[false, false, 0], [true, false, 0], [false, false, 0], [true, false, 0]], \"passed\": true}, {\"check\": \"regression: long hold after done\", \"actual\": [[false, true, 0], [false, true, 30], [true, false, 60], [true, false, 90], [false, false, 0]], \"expected\": [[false, true, 0], [false, true, 30], [true, false, 50], [true, false, 50], [false, false, 0]], \"passed\": false}, {\"check\": \"regression: scenario 1\", \"actual\": [[false, true, 0], [false, false, 0], [false, true, 0], [false, false, 0], [false, false, 0], [false, true, 0], [false, true, 25], [true, false, 65]], \"expected\": [[false, true, 0], [false, false, 0], [false, true, 0], [false, false, 0], [false, false, 0], [false, true, 0], [false, true, 25], [true, false, 30]], \"passed\": false}, {\"check\": \"regression: scenario 2\", \"actual\": [[false, false, 0], [false, true, 0], [false, true, 0], [false, true, 0], [false, true, 25], [true, false, 100], [true, false, 175]], \"expected\": [[false, false, 0], [false, true, 0], [false, true, 0], [false, true, 0], [false, true, 25], [true, false, 30], [true, false, 30]], \"passed\": false}, {\"check\": \"control: scenario 3\", \"actual\": [[false, true, 0], [false, true, 20], [false, false, 0], [false, true, 0], [false, true, 0], [false, false, 0], [false, true, 0]], \"expected\": [[false, true, 0], [false, true, 20], [false, false, 0], [false, true, 0], [false, true, 0], [false, false, 0], [false, true, 0]], \"passed\": true}, {\"check\": \"regression: scenario 4\", \"actual\": [[true, false, 0], [false, false, 0], [true, false, 0], [true, false, 20], [true, false, 60], [true, false, 80], [true, false, 155], [true, false, 155], [true, false, 165]], \"expected\": [[true, false, 0], [false, false, 0], [true, false, 0], [true, false, 0], [true, false, 0], [true, false, 0], [true, false, 0], [true, false, 0], [true, false, 0]], \"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."}}