{"abstract":"Charging time before an EV-initiated pause disappears from the session total.","category":"EV charging session scheduling","checks":7,"contract":"Chronological [t, event] pairs drive states Available, Preparing, Charging, SuspendedEV, Finishing. plug: Available->Preparing. auth: Preparing->Charging. ev_pause/ev_resume toggle Charging/SuspendedEV. stop: Charging or SuspendedEV->Finishing. unplug: any non-Available state ->Available, counted abrupt from Charging or SuspendedEV. Before handling each event, a Preparing connector whose plug is more than timeout seconds old returns to Available (one timeout). Invalid events are ignored. Return [state, seconds spent in Charging, timeouts, abrupt].","evaluation_group":"w2-ev_charging_session_scheduling-connector-session-states","failed_approach":"Assigning instead of adding discards earlier charging intervals.","family":"w2-ev_charging_session_scheduling-connector-session-states-pause-accumulation","id":"FA-93196","implementations":{"attempt":{"sha256":"ac928c4456102c75c38b64a5977d049c09128d37df40cc425860ff0cba20d48c","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(events, timeout):\n    state = 'Available'\n    plug_t = None\n    since = None\n    charged = 0\n    timeouts = 0\n    abrupt = 0\n    for t, ev in events:\n        if state == 'Preparing' and t - plug_t > timeout:\n            state = 'Available'\n            timeouts += 1\n        if ev == 'plug' and state == 'Available':\n            state = 'Preparing'\n            plug_t = t\n        elif ev == 'auth' and state == 'Preparing':\n            state = 'Charging'\n            since = t\n        elif ev == 'ev_pause' and state == 'Charging':\n            charged = t - since\n            state = 'SuspendedEV'\n        elif ev == 'ev_resume' and state == 'SuspendedEV':\n            state = 'Charging'\n            since = t\n        elif ev == 'stop' and state in ('Charging', 'SuspendedEV'):\n            if state == 'Charging':\n                charged += t - since\n            state = 'Finishing'\n        elif ev == 'unplug' and state != 'Available':\n            if state == 'Charging':\n                charged += t - since\n            if state in ('Charging', 'SuspendedEV'):\n                abrupt += 1\n            state = 'Available'\n    return [state, charged, timeouts, abrupt]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[['boundary: authorised exactly at timeout', [[[0, 'plug'], [60, 'auth'], [100, 'stop']], 60],\n   ['Finishing', 40, 0, 0]],\n  ['normal: pause and resume',\n   [[[0, 'plug'], [5, 'auth'], [65, 'ev_pause'], [125, 'ev_resume'], [185, 'stop'],\n     [190, 'unplug']],\n    60],\n   ['Available', 120, 0, 0]],\n  ['boundary: unplug while charging', [[[0, 'plug'], [10, 'auth'], [70, 'unplug']], 60],\n   ['Available', 60, 0, 1]],\n  ['regression: two pauses in one session',\n   [[[0, 'plug'], [5, 'auth'], [65, 'ev_pause'], [125, 'ev_resume'], [185, 'ev_pause'],\n     [245, 'stop']],\n    60],\n   ['Finishing', 120, 0, 0]],\n  ['regression: pause accumulation',\n   [[[10, 'plug'], [70, 'ev_resume'], [131, 'auth'], [191, 'unplug'], [196, 'auth'],\n     [496, 'ev_resume'], [796, 'ev_resume'], [1096, 'plug'], [1156, 'auth'], [1217, 'ev_pause']],\n    90],\n   ['SuspendedEV', 61, 1, 0]],\n  ['control 1',\n   [[[5, 'plug'], [5, 'plug'], [15, 'plug'], [315, 'auth'], [376, 'ev_resume'], [496, 'auth'],\n     [796, 'auth'], [1096, 'unplug']],\n    60],\n   ['Available', 0, 1, 0]],\n  ['control 2', [[[30, 'unplug'], [91, 'auth'], [96, 'unplug'], [106, 'ev_resume']], 90],\n   ['Available', 0, 0, 0]]],\n [['boundary: authorised exactly at timeout', [[[0, 'plug'], [60, 'auth'], [100, 'stop']], 60],\n   ['Finishing', 40, 0, 0]],\n  ['normal: pause and resume',\n   [[[0, 'plug'], [5, 'auth'], [65, 'ev_pause'], [125, 'ev_resume'], [185, 'stop'],\n     [190, 'unplug']],\n    60],\n   ['Available', 120, 0, 0]],\n  ['boundary: unplug while charging', [[[0, 'plug'], [10, 'auth'], [70, 'unplug']], 60],\n   ['Available', 60, 0, 1]],\n  ['regression: two pauses in one session',\n   [[[0, 'plug'], [5, 'auth'], [65, 'ev_pause'], [125, 'ev_resume'], [185, 'ev_pause'],\n     [245, 'stop']],\n    60],\n   ['Finishing', 120, 0, 0]],\n  ['regression: pause accumulation',\n   [[[10, 'plug'], [70, 'ev_resume'], [131, 'auth'], [191, 'unplug'], [196, 'auth'],\n     [496, 'ev_resume'], [796, 'ev_resume'], [1096, 'plug'], [1156, 'auth'], [1217, 'ev_pause']],\n    90],\n   ['SuspendedEV', 61, 1, 0]],\n  ['control 1', [[[120, 'auth'], [240, 'ev_resume'], [540, 'unplug']], 60], ['Available', 0, 0, 0]],\n  ['control 2', [[[60, 'unplug'], [180, 'stop'], [240, 'stop'], [270, 'unplug']], 60],\n   ['Available', 0, 0, 0]]],\n [['boundary: authorised exactly at timeout', [[[0, 'plug'], [60, 'auth'], [100, 'stop']], 60],\n   ['Finishing', 40, 0, 0]],\n  ['normal: pause and resume',\n   [[[0, 'plug'], [5, 'auth'], [65, 'ev_pause'], [125, 'ev_resume'], [185, 'stop'],\n     [190, 'unplug']],\n    60],\n   ['Available', 120, 0, 0]],\n  ['boundary: unplug while charging', [[[0, 'plug'], [10, 'auth'], [70, 'unplug']], 60],\n   ['Available', 60, 0, 1]],\n  ['regression: two pauses in one session',\n   [[[0, 'plug'], [5, 'auth'], [65, 'ev_pause'], [125, 'ev_resume'], [185, 'ev_pause'],\n     [245, 'stop']],\n    60],\n   ['Finishing', 120, 0, 0]],\n  ['regression: pause accumulation',\n   [[[0, 'ev_pause'], [60, 'unplug'], [90, 'unplug'], [150, 'unplug'], [270, 'plug'], [330, 'auth'],\n     [630, 'ev_resume'], [750, 'auth'], [750, 'ev_pause']],\n    90],\n   ['SuspendedEV', 420, 0, 0]],\n  ['control 1', [[[0, 'unplug'], [10, 'ev_pause'], [10, 'plug']], 60], ['Preparing', 0, 0, 0]],\n  ['control 2', [[[300, 'plug'], [360, 'ev_pause'], [421, 'ev_pause']], 30],\n   ['Available', 0, 1, 0]]],\n [['boundary: authorised exactly at timeout', [[[0, 'plug'], [60, 'auth'], [100, 'stop']], 60],\n   ['Finishing', 40, 0, 0]],\n  ['normal: pause and resume',\n   [[[0, 'plug'], [5, 'auth'], [65, 'ev_pause'], [125, 'ev_resume'], [185, 'stop'],\n     [190, 'unplug']],\n    60],\n   ['Available', 120, 0, 0]],\n  ['boundary: unplug while charging', [[[0, 'plug'], [10, 'auth'], [70, 'unplug']], 60],\n   ['Available', 60, 0, 1]],\n  ['regression: two pauses in one session',\n   [[[0, 'plug'], [5, 'auth'], [65, 'ev_pause'], [125, 'ev_resume'], [185, 'ev_pause'],\n     [245, 'stop']],\n    60],\n   ['Finishing', 120, 0, 0]],\n  ['regression: pause accumulation',\n   [[[30, 'plug'], [60, 'auth'], [120, 'ev_resume'], [180, 'ev_resume'], [185, 'plug'],\n     [190, 'plug'], [250, 'ev_pause'], [370, 'unplug']],\n    30],\n   ['Available', 190, 0, 1]],\n  ['control 1',\n   [[[61, 'auth'], [91, 'unplug'], [211, 'unplug'], [221, 'ev_resume'], [281, 'plug'],\n     [311, 'ev_pause'], [321, 'unplug'], [326, 'plug']],\n    30],\n   ['Preparing', 0, 1, 0]],\n  ['control 2',\n   [[[300, 'plug'], [600, 'ev_resume'], [900, 'ev_resume'], [961, 'unplug'], [966, 'auth'],\n     [971, 'unplug'], [1271, 'auth'], [1276, 'ev_pause']],\n    60],\n   ['Available', 0, 1, 0]]],\n [['boundary: authorised exactly at timeout', [[[0, 'plug'], [60, 'auth'], [100, 'stop']], 60],\n   ['Finishing', 40, 0, 0]],\n  ['normal: pause and resume',\n   [[[0, 'plug'], [5, 'auth'], [65, 'ev_pause'], [125, 'ev_resume'], [185, 'stop'],\n     [190, 'unplug']],\n    60],\n   ['Available', 120, 0, 0]],\n  ['boundary: unplug while charging', [[[0, 'plug'], [10, 'auth'], [70, 'unplug']], 60],\n   ['Available', 60, 0, 1]],\n  ['regression: two pauses in one session',\n   [[[0, 'plug'], [5, 'auth'], [65, 'ev_pause'], [125, 'ev_resume'], [185, 'ev_pause'],\n     [245, 'stop']],\n    60],\n   ['Finishing', 120, 0, 0]],\n  ['regression: pause accumulation',\n   [[[0, 'unplug'], [5, 'unplug'], [5, 'plug'], [35, 'auth'], [95, 'ev_pause'], [100, 'ev_resume'],\n     [130, 'plug'], [160, 'unplug'], [160, 'plug'], [160, 'plug']],\n    60],\n   ['Preparing', 120, 0, 1]],\n  ['control 1', [[[61, 'unplug'], [361, 'auth'], [421, 'unplug'], [426, 'ev_pause']], 60],\n   ['Available', 0, 0, 0]],\n  ['control 2',\n   [[[5, 'ev_resume'], [305, 'unplug'], [605, 'plug'], [665, 'ev_resume'], [670, 'ev_resume']], 60],\n   ['Available', 0, 1, 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":"9e8aed3534b074e9a4668ce96124c1ac9b52fbbc88ca4e9983e32f199b5995ae","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(events, timeout):\n    state = 'Available'\n    plug_t = None\n    since = None\n    charged = 0\n    timeouts = 0\n    abrupt = 0\n    for t, ev in events:\n        if state == 'Preparing' and t - plug_t > timeout:\n            state = 'Available'\n            timeouts += 1\n        if ev == 'plug' and state == 'Available':\n            state = 'Preparing'\n            plug_t = t\n        elif ev == 'auth' and state == 'Preparing':\n            state = 'Charging'\n            since = t\n        elif ev == 'ev_pause' and state == 'Charging':\n            state = 'SuspendedEV'\n        elif ev == 'ev_resume' and state == 'SuspendedEV':\n            state = 'Charging'\n            since = t\n        elif ev == 'stop' and state in ('Charging', 'SuspendedEV'):\n            if state == 'Charging':\n                charged += t - since\n            state = 'Finishing'\n        elif ev == 'unplug' and state != 'Available':\n            if state == 'Charging':\n                charged += t - since\n            if state in ('Charging', 'SuspendedEV'):\n                abrupt += 1\n            state = 'Available'\n    return [state, charged, timeouts, abrupt]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[['boundary: authorised exactly at timeout', [[[0, 'plug'], [60, 'auth'], [100, 'stop']], 60],\n   ['Finishing', 40, 0, 0]],\n  ['normal: pause and resume',\n   [[[0, 'plug'], [5, 'auth'], [65, 'ev_pause'], [125, 'ev_resume'], [185, 'stop'],\n     [190, 'unplug']],\n    60],\n   ['Available', 120, 0, 0]],\n  ['boundary: unplug while charging', [[[0, 'plug'], [10, 'auth'], [70, 'unplug']], 60],\n   ['Available', 60, 0, 1]],\n  ['regression: two pauses in one session',\n   [[[0, 'plug'], [5, 'auth'], [65, 'ev_pause'], [125, 'ev_resume'], [185, 'ev_pause'],\n     [245, 'stop']],\n    60],\n   ['Finishing', 120, 0, 0]],\n  ['regression: pause accumulation',\n   [[[10, 'plug'], [70, 'ev_resume'], [131, 'auth'], [191, 'unplug'], [196, 'auth'],\n     [496, 'ev_resume'], [796, 'ev_resume'], [1096, 'plug'], [1156, 'auth'], [1217, 'ev_pause']],\n    90],\n   ['SuspendedEV', 61, 1, 0]],\n  ['control 1',\n   [[[5, 'plug'], [5, 'plug'], [15, 'plug'], [315, 'auth'], [376, 'ev_resume'], [496, 'auth'],\n     [796, 'auth'], [1096, 'unplug']],\n    60],\n   ['Available', 0, 1, 0]],\n  ['control 2', [[[30, 'unplug'], [91, 'auth'], [96, 'unplug'], [106, 'ev_resume']], 90],\n   ['Available', 0, 0, 0]]],\n [['boundary: authorised exactly at timeout', [[[0, 'plug'], [60, 'auth'], [100, 'stop']], 60],\n   ['Finishing', 40, 0, 0]],\n  ['normal: pause and resume',\n   [[[0, 'plug'], [5, 'auth'], [65, 'ev_pause'], [125, 'ev_resume'], [185, 'stop'],\n     [190, 'unplug']],\n    60],\n   ['Available', 120, 0, 0]],\n  ['boundary: unplug while charging', [[[0, 'plug'], [10, 'auth'], [70, 'unplug']], 60],\n   ['Available', 60, 0, 1]],\n  ['regression: two pauses in one session',\n   [[[0, 'plug'], [5, 'auth'], [65, 'ev_pause'], [125, 'ev_resume'], [185, 'ev_pause'],\n     [245, 'stop']],\n    60],\n   ['Finishing', 120, 0, 0]],\n  ['regression: pause accumulation',\n   [[[10, 'plug'], [70, 'ev_resume'], [131, 'auth'], [191, 'unplug'], [196, 'auth'],\n     [496, 'ev_resume'], [796, 'ev_resume'], [1096, 'plug'], [1156, 'auth'], [1217, 'ev_pause']],\n    90],\n   ['SuspendedEV', 61, 1, 0]],\n  ['control 1', [[[120, 'auth'], [240, 'ev_resume'], [540, 'unplug']], 60], ['Available', 0, 0, 0]],\n  ['control 2', [[[60, 'unplug'], [180, 'stop'], [240, 'stop'], [270, 'unplug']], 60],\n   ['Available', 0, 0, 0]]],\n [['boundary: authorised exactly at timeout', [[[0, 'plug'], [60, 'auth'], [100, 'stop']], 60],\n   ['Finishing', 40, 0, 0]],\n  ['normal: pause and resume',\n   [[[0, 'plug'], [5, 'auth'], [65, 'ev_pause'], [125, 'ev_resume'], [185, 'stop'],\n     [190, 'unplug']],\n    60],\n   ['Available', 120, 0, 0]],\n  ['boundary: unplug while charging', [[[0, 'plug'], [10, 'auth'], [70, 'unplug']], 60],\n   ['Available', 60, 0, 1]],\n  ['regression: two pauses in one session',\n   [[[0, 'plug'], [5, 'auth'], [65, 'ev_pause'], [125, 'ev_resume'], [185, 'ev_pause'],\n     [245, 'stop']],\n    60],\n   ['Finishing', 120, 0, 0]],\n  ['regression: pause accumulation',\n   [[[0, 'ev_pause'], [60, 'unplug'], [90, 'unplug'], [150, 'unplug'], [270, 'plug'], [330, 'auth'],\n     [630, 'ev_resume'], [750, 'auth'], [750, 'ev_pause']],\n    90],\n   ['SuspendedEV', 420, 0, 0]],\n  ['control 1', [[[0, 'unplug'], [10, 'ev_pause'], [10, 'plug']], 60], ['Preparing', 0, 0, 0]],\n  ['control 2', [[[300, 'plug'], [360, 'ev_pause'], [421, 'ev_pause']], 30],\n   ['Available', 0, 1, 0]]],\n [['boundary: authorised exactly at timeout', [[[0, 'plug'], [60, 'auth'], [100, 'stop']], 60],\n   ['Finishing', 40, 0, 0]],\n  ['normal: pause and resume',\n   [[[0, 'plug'], [5, 'auth'], [65, 'ev_pause'], [125, 'ev_resume'], [185, 'stop'],\n     [190, 'unplug']],\n    60],\n   ['Available', 120, 0, 0]],\n  ['boundary: unplug while charging', [[[0, 'plug'], [10, 'auth'], [70, 'unplug']], 60],\n   ['Available', 60, 0, 1]],\n  ['regression: two pauses in one session',\n   [[[0, 'plug'], [5, 'auth'], [65, 'ev_pause'], [125, 'ev_resume'], [185, 'ev_pause'],\n     [245, 'stop']],\n    60],\n   ['Finishing', 120, 0, 0]],\n  ['regression: pause accumulation',\n   [[[30, 'plug'], [60, 'auth'], [120, 'ev_resume'], [180, 'ev_resume'], [185, 'plug'],\n     [190, 'plug'], [250, 'ev_pause'], [370, 'unplug']],\n    30],\n   ['Available', 190, 0, 1]],\n  ['control 1',\n   [[[61, 'auth'], [91, 'unplug'], [211, 'unplug'], [221, 'ev_resume'], [281, 'plug'],\n     [311, 'ev_pause'], [321, 'unplug'], [326, 'plug']],\n    30],\n   ['Preparing', 0, 1, 0]],\n  ['control 2',\n   [[[300, 'plug'], [600, 'ev_resume'], [900, 'ev_resume'], [961, 'unplug'], [966, 'auth'],\n     [971, 'unplug'], [1271, 'auth'], [1276, 'ev_pause']],\n    60],\n   ['Available', 0, 1, 0]]],\n [['boundary: authorised exactly at timeout', [[[0, 'plug'], [60, 'auth'], [100, 'stop']], 60],\n   ['Finishing', 40, 0, 0]],\n  ['normal: pause and resume',\n   [[[0, 'plug'], [5, 'auth'], [65, 'ev_pause'], [125, 'ev_resume'], [185, 'stop'],\n     [190, 'unplug']],\n    60],\n   ['Available', 120, 0, 0]],\n  ['boundary: unplug while charging', [[[0, 'plug'], [10, 'auth'], [70, 'unplug']], 60],\n   ['Available', 60, 0, 1]],\n  ['regression: two pauses in one session',\n   [[[0, 'plug'], [5, 'auth'], [65, 'ev_pause'], [125, 'ev_resume'], [185, 'ev_pause'],\n     [245, 'stop']],\n    60],\n   ['Finishing', 120, 0, 0]],\n  ['regression: pause accumulation',\n   [[[0, 'unplug'], [5, 'unplug'], [5, 'plug'], [35, 'auth'], [95, 'ev_pause'], [100, 'ev_resume'],\n     [130, 'plug'], [160, 'unplug'], [160, 'plug'], [160, 'plug']],\n    60],\n   ['Preparing', 120, 0, 1]],\n  ['control 1', [[[61, 'unplug'], [361, 'auth'], [421, 'unplug'], [426, 'ev_pause']], 60],\n   ['Available', 0, 0, 0]],\n  ['control 2',\n   [[[5, 'ev_resume'], [305, 'unplug'], [605, 'plug'], [665, 'ev_resume'], [670, 'ev_resume']], 60],\n   ['Available', 0, 1, 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"},"fixed":{"sha256":"c960c8eaee8652b8a64010428a298f8592c02075dd8121996943303fc76b7344","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(events, timeout):\n    state = 'Available'\n    plug_t = None\n    since = None\n    charged = 0\n    timeouts = 0\n    abrupt = 0\n    for t, ev in events:\n        if state == 'Preparing' and t - plug_t > timeout:\n            state = 'Available'\n            timeouts += 1\n        if ev == 'plug' and state == 'Available':\n            state = 'Preparing'\n            plug_t = t\n        elif ev == 'auth' and state == 'Preparing':\n            state = 'Charging'\n            since = t\n        elif ev == 'ev_pause' and state == 'Charging':\n            charged += t - since\n            state = 'SuspendedEV'\n        elif ev == 'ev_resume' and state == 'SuspendedEV':\n            state = 'Charging'\n            since = t\n        elif ev == 'stop' and state in ('Charging', 'SuspendedEV'):\n            if state == 'Charging':\n                charged += t - since\n            state = 'Finishing'\n        elif ev == 'unplug' and state != 'Available':\n            if state == 'Charging':\n                charged += t - since\n            if state in ('Charging', 'SuspendedEV'):\n                abrupt += 1\n            state = 'Available'\n    return [state, charged, timeouts, abrupt]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[['boundary: authorised exactly at timeout', [[[0, 'plug'], [60, 'auth'], [100, 'stop']], 60],\n   ['Finishing', 40, 0, 0]],\n  ['normal: pause and resume',\n   [[[0, 'plug'], [5, 'auth'], [65, 'ev_pause'], [125, 'ev_resume'], [185, 'stop'],\n     [190, 'unplug']],\n    60],\n   ['Available', 120, 0, 0]],\n  ['boundary: unplug while charging', [[[0, 'plug'], [10, 'auth'], [70, 'unplug']], 60],\n   ['Available', 60, 0, 1]],\n  ['regression: two pauses in one session',\n   [[[0, 'plug'], [5, 'auth'], [65, 'ev_pause'], [125, 'ev_resume'], [185, 'ev_pause'],\n     [245, 'stop']],\n    60],\n   ['Finishing', 120, 0, 0]],\n  ['regression: pause accumulation',\n   [[[10, 'plug'], [70, 'ev_resume'], [131, 'auth'], [191, 'unplug'], [196, 'auth'],\n     [496, 'ev_resume'], [796, 'ev_resume'], [1096, 'plug'], [1156, 'auth'], [1217, 'ev_pause']],\n    90],\n   ['SuspendedEV', 61, 1, 0]],\n  ['control 1',\n   [[[5, 'plug'], [5, 'plug'], [15, 'plug'], [315, 'auth'], [376, 'ev_resume'], [496, 'auth'],\n     [796, 'auth'], [1096, 'unplug']],\n    60],\n   ['Available', 0, 1, 0]],\n  ['control 2', [[[30, 'unplug'], [91, 'auth'], [96, 'unplug'], [106, 'ev_resume']], 90],\n   ['Available', 0, 0, 0]]],\n [['boundary: authorised exactly at timeout', [[[0, 'plug'], [60, 'auth'], [100, 'stop']], 60],\n   ['Finishing', 40, 0, 0]],\n  ['normal: pause and resume',\n   [[[0, 'plug'], [5, 'auth'], [65, 'ev_pause'], [125, 'ev_resume'], [185, 'stop'],\n     [190, 'unplug']],\n    60],\n   ['Available', 120, 0, 0]],\n  ['boundary: unplug while charging', [[[0, 'plug'], [10, 'auth'], [70, 'unplug']], 60],\n   ['Available', 60, 0, 1]],\n  ['regression: two pauses in one session',\n   [[[0, 'plug'], [5, 'auth'], [65, 'ev_pause'], [125, 'ev_resume'], [185, 'ev_pause'],\n     [245, 'stop']],\n    60],\n   ['Finishing', 120, 0, 0]],\n  ['regression: pause accumulation',\n   [[[10, 'plug'], [70, 'ev_resume'], [131, 'auth'], [191, 'unplug'], [196, 'auth'],\n     [496, 'ev_resume'], [796, 'ev_resume'], [1096, 'plug'], [1156, 'auth'], [1217, 'ev_pause']],\n    90],\n   ['SuspendedEV', 61, 1, 0]],\n  ['control 1', [[[120, 'auth'], [240, 'ev_resume'], [540, 'unplug']], 60], ['Available', 0, 0, 0]],\n  ['control 2', [[[60, 'unplug'], [180, 'stop'], [240, 'stop'], [270, 'unplug']], 60],\n   ['Available', 0, 0, 0]]],\n [['boundary: authorised exactly at timeout', [[[0, 'plug'], [60, 'auth'], [100, 'stop']], 60],\n   ['Finishing', 40, 0, 0]],\n  ['normal: pause and resume',\n   [[[0, 'plug'], [5, 'auth'], [65, 'ev_pause'], [125, 'ev_resume'], [185, 'stop'],\n     [190, 'unplug']],\n    60],\n   ['Available', 120, 0, 0]],\n  ['boundary: unplug while charging', [[[0, 'plug'], [10, 'auth'], [70, 'unplug']], 60],\n   ['Available', 60, 0, 1]],\n  ['regression: two pauses in one session',\n   [[[0, 'plug'], [5, 'auth'], [65, 'ev_pause'], [125, 'ev_resume'], [185, 'ev_pause'],\n     [245, 'stop']],\n    60],\n   ['Finishing', 120, 0, 0]],\n  ['regression: pause accumulation',\n   [[[0, 'ev_pause'], [60, 'unplug'], [90, 'unplug'], [150, 'unplug'], [270, 'plug'], [330, 'auth'],\n     [630, 'ev_resume'], [750, 'auth'], [750, 'ev_pause']],\n    90],\n   ['SuspendedEV', 420, 0, 0]],\n  ['control 1', [[[0, 'unplug'], [10, 'ev_pause'], [10, 'plug']], 60], ['Preparing', 0, 0, 0]],\n  ['control 2', [[[300, 'plug'], [360, 'ev_pause'], [421, 'ev_pause']], 30],\n   ['Available', 0, 1, 0]]],\n [['boundary: authorised exactly at timeout', [[[0, 'plug'], [60, 'auth'], [100, 'stop']], 60],\n   ['Finishing', 40, 0, 0]],\n  ['normal: pause and resume',\n   [[[0, 'plug'], [5, 'auth'], [65, 'ev_pause'], [125, 'ev_resume'], [185, 'stop'],\n     [190, 'unplug']],\n    60],\n   ['Available', 120, 0, 0]],\n  ['boundary: unplug while charging', [[[0, 'plug'], [10, 'auth'], [70, 'unplug']], 60],\n   ['Available', 60, 0, 1]],\n  ['regression: two pauses in one session',\n   [[[0, 'plug'], [5, 'auth'], [65, 'ev_pause'], [125, 'ev_resume'], [185, 'ev_pause'],\n     [245, 'stop']],\n    60],\n   ['Finishing', 120, 0, 0]],\n  ['regression: pause accumulation',\n   [[[30, 'plug'], [60, 'auth'], [120, 'ev_resume'], [180, 'ev_resume'], [185, 'plug'],\n     [190, 'plug'], [250, 'ev_pause'], [370, 'unplug']],\n    30],\n   ['Available', 190, 0, 1]],\n  ['control 1',\n   [[[61, 'auth'], [91, 'unplug'], [211, 'unplug'], [221, 'ev_resume'], [281, 'plug'],\n     [311, 'ev_pause'], [321, 'unplug'], [326, 'plug']],\n    30],\n   ['Preparing', 0, 1, 0]],\n  ['control 2',\n   [[[300, 'plug'], [600, 'ev_resume'], [900, 'ev_resume'], [961, 'unplug'], [966, 'auth'],\n     [971, 'unplug'], [1271, 'auth'], [1276, 'ev_pause']],\n    60],\n   ['Available', 0, 1, 0]]],\n [['boundary: authorised exactly at timeout', [[[0, 'plug'], [60, 'auth'], [100, 'stop']], 60],\n   ['Finishing', 40, 0, 0]],\n  ['normal: pause and resume',\n   [[[0, 'plug'], [5, 'auth'], [65, 'ev_pause'], [125, 'ev_resume'], [185, 'stop'],\n     [190, 'unplug']],\n    60],\n   ['Available', 120, 0, 0]],\n  ['boundary: unplug while charging', [[[0, 'plug'], [10, 'auth'], [70, 'unplug']], 60],\n   ['Available', 60, 0, 1]],\n  ['regression: two pauses in one session',\n   [[[0, 'plug'], [5, 'auth'], [65, 'ev_pause'], [125, 'ev_resume'], [185, 'ev_pause'],\n     [245, 'stop']],\n    60],\n   ['Finishing', 120, 0, 0]],\n  ['regression: pause accumulation',\n   [[[0, 'unplug'], [5, 'unplug'], [5, 'plug'], [35, 'auth'], [95, 'ev_pause'], [100, 'ev_resume'],\n     [130, 'plug'], [160, 'unplug'], [160, 'plug'], [160, 'plug']],\n    60],\n   ['Preparing', 120, 0, 1]],\n  ['control 1', [[[61, 'unplug'], [361, 'auth'], [421, 'unplug'], [426, 'ev_pause']], 60],\n   ['Available', 0, 0, 0]],\n  ['control 2',\n   [[[5, 'ev_resume'], [305, 'unplug'], [605, 'plug'], [665, 'ev_resume'], [670, 'ev_resume']], 60],\n   ['Available', 0, 1, 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":"Deterministic stipulated toy contract for teaching; no claim of conformance with any standard, vendor protocol or production controller. 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-ev_charging_session_scheduling-connector-session-states-pause-accumulation","generated_at":"2026-09-29T14:51:52.972791+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"Depot, workplace and public EV chargers schedule sessions against prices, circuit limits and departure deadlines; a wrong decision silently strands a driver or overloads a feeder.","repair":"Add t - since to the total when the EV pauses.","root_cause":"Entering SuspendedEV does not bank the elapsed charging interval.","sha256":"2b011aa69b235c8f20d211d020be863b3b3b47030a1ab50a64e4248739b413c8","title":"Connector session state machine: pause accumulation · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":40.016,"exit_code":1,"observations":[{"actual":["Finishing",40,0,0],"check":"boundary: authorised exactly at timeout","expected":["Finishing",40,0,0],"passed":true},{"actual":["Available",120,0,0],"check":"normal: pause and resume","expected":["Available",120,0,0],"passed":true},{"actual":["Available",60,0,1],"check":"boundary: unplug while charging","expected":["Available",60,0,1],"passed":true},{"actual":["Finishing",60,0,0],"check":"regression: two pauses in one session","expected":["Finishing",120,0,0],"passed":false},{"actual":["SuspendedEV",61,1,0],"check":"regression: pause accumulation","expected":["SuspendedEV",61,1,0],"passed":true},{"actual":["Available",0,1,0],"check":"control 1","expected":["Available",0,1,0],"passed":true},{"actual":["Available",0,0,0],"check":"control 2","expected":["Available",0,0,0],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary: authorised exactly at timeout\", \"actual\": [\"Finishing\", 40, 0, 0], \"expected\": [\"Finishing\", 40, 0, 0], \"passed\": true}, {\"check\": \"normal: pause and resume\", \"actual\": [\"Available\", 120, 0, 0], \"expected\": [\"Available\", 120, 0, 0], \"passed\": true}, {\"check\": \"boundary: unplug while charging\", \"actual\": [\"Available\", 60, 0, 1], \"expected\": [\"Available\", 60, 0, 1], \"passed\": true}, {\"check\": \"regression: two pauses in one session\", \"actual\": [\"Finishing\", 60, 0, 0], \"expected\": [\"Finishing\", 120, 0, 0], \"passed\": false}, {\"check\": \"regression: pause accumulation\", \"actual\": [\"SuspendedEV\", 61, 1, 0], \"expected\": [\"SuspendedEV\", 61, 1, 0], \"passed\": true}, {\"check\": \"control 1\", \"actual\": [\"Available\", 0, 1, 0], \"expected\": [\"Available\", 0, 1, 0], \"passed\": true}, {\"check\": \"control 2\", \"actual\": [\"Available\", 0, 0, 0], \"expected\": [\"Available\", 0, 0, 0], \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":44.955,"exit_code":1,"observations":[{"actual":["Finishing",40,0,0],"check":"boundary: authorised exactly at timeout","expected":["Finishing",40,0,0],"passed":true},{"actual":["Available",60,0,0],"check":"normal: pause and resume","expected":["Available",120,0,0],"passed":false},{"actual":["Available",60,0,1],"check":"boundary: unplug while charging","expected":["Available",60,0,1],"passed":true},{"actual":["Finishing",0,0,0],"check":"regression: two pauses in one session","expected":["Finishing",120,0,0],"passed":false},{"actual":["SuspendedEV",0,1,0],"check":"regression: pause accumulation","expected":["SuspendedEV",61,1,0],"passed":false},{"actual":["Available",0,1,0],"check":"control 1","expected":["Available",0,1,0],"passed":true},{"actual":["Available",0,0,0],"check":"control 2","expected":["Available",0,0,0],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary: authorised exactly at timeout\", \"actual\": [\"Finishing\", 40, 0, 0], \"expected\": [\"Finishing\", 40, 0, 0], \"passed\": true}, {\"check\": \"normal: pause and resume\", \"actual\": [\"Available\", 60, 0, 0], \"expected\": [\"Available\", 120, 0, 0], \"passed\": false}, {\"check\": \"boundary: unplug while charging\", \"actual\": [\"Available\", 60, 0, 1], \"expected\": [\"Available\", 60, 0, 1], \"passed\": true}, {\"check\": \"regression: two pauses in one session\", \"actual\": [\"Finishing\", 0, 0, 0], \"expected\": [\"Finishing\", 120, 0, 0], \"passed\": false}, {\"check\": \"regression: pause accumulation\", \"actual\": [\"SuspendedEV\", 0, 1, 0], \"expected\": [\"SuspendedEV\", 61, 1, 0], \"passed\": false}, {\"check\": \"control 1\", \"actual\": [\"Available\", 0, 1, 0], \"expected\": [\"Available\", 0, 1, 0], \"passed\": true}, {\"check\": \"control 2\", \"actual\": [\"Available\", 0, 0, 0], \"expected\": [\"Available\", 0, 0, 0], \"passed\": true}], \"passed\": false}\n"},"fixed":{"elapsed_ms":42.457,"exit_code":0,"observations":[{"actual":["Finishing",40,0,0],"check":"boundary: authorised exactly at timeout","expected":["Finishing",40,0,0],"passed":true},{"actual":["Available",120,0,0],"check":"normal: pause and resume","expected":["Available",120,0,0],"passed":true},{"actual":["Available",60,0,1],"check":"boundary: unplug while charging","expected":["Available",60,0,1],"passed":true},{"actual":["Finishing",120,0,0],"check":"regression: two pauses in one session","expected":["Finishing",120,0,0],"passed":true},{"actual":["SuspendedEV",61,1,0],"check":"regression: pause accumulation","expected":["SuspendedEV",61,1,0],"passed":true},{"actual":["Available",0,1,0],"check":"control 1","expected":["Available",0,1,0],"passed":true},{"actual":["Available",0,0,0],"check":"control 2","expected":["Available",0,0,0],"passed":true}],"passed":true,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary: authorised exactly at timeout\", \"actual\": [\"Finishing\", 40, 0, 0], \"expected\": [\"Finishing\", 40, 0, 0], \"passed\": true}, {\"check\": \"normal: pause and resume\", \"actual\": [\"Available\", 120, 0, 0], \"expected\": [\"Available\", 120, 0, 0], \"passed\": true}, {\"check\": \"boundary: unplug while charging\", \"actual\": [\"Available\", 60, 0, 1], \"expected\": [\"Available\", 60, 0, 1], \"passed\": true}, {\"check\": \"regression: two pauses in one session\", \"actual\": [\"Finishing\", 120, 0, 0], \"expected\": [\"Finishing\", 120, 0, 0], \"passed\": true}, {\"check\": \"regression: pause accumulation\", \"actual\": [\"SuspendedEV\", 61, 1, 0], \"expected\": [\"SuspendedEV\", 61, 1, 0], \"passed\": true}, {\"check\": \"control 1\", \"actual\": [\"Available\", 0, 1, 0], \"expected\": [\"Available\", 0, 1, 0], \"passed\": true}, {\"check\": \"control 2\", \"actual\": [\"Available\", 0, 0, 0], \"expected\": [\"Available\", 0, 0, 0], \"passed\": true}], \"passed\": true}\n"}},"verified":true,"visibility":"public"}