{"abstract":"Unpaid subscriptions keep counting failures or are silently reactivated.","category":"Subscription proration billing","checks":8,"contract":"Input {events: [[day, fail|pay]], due, retry: offsets from due for retries, final canceled|unpaid, today}. Events up to today are processed by day (stable). Payment settles: status active, no retry, stop. Each failure increments a counter; after more failures than scheduled retries the status becomes final and processing stops; otherwise past_due with next retry at due + retry[failures-1]. Return [status, next_retry].","evaluation_group":"w2-subscription-proration-dunning-retry-state","failed_approach":"The attempt stops only on failures, so a later payment reactivates a terminated subscription.","family":"w2-subscription-proration-dunning-retry-state-terminal-status-stop","id":"FA-59601","implementations":{"attempt":{"sha256":"4c15b823d85f0d81db9ec8877500f8a44ba6a50f2482a6188fba7c3c034611e9","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(x):\n    status = 'active'\n    fails = 0\n    nxt = None\n    for day, kind in sorted(x['events'], key=lambda e: e[0]):\n        if day > x['today']:\n            break\n        if status == x['final'] and kind == 'fail':\n            break\n        if kind == 'pay':\n            status = 'active'; nxt = None; break\n        fails += 1\n        if fails > len(x['retry']):\n            status = x['final']; nxt = None\n        else:\n            status = 'past_due'; nxt = x['due'] + x['retry'][fails - 1]\n    return [status, nxt]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[('regression', {'events': [[37, 'pay'], [38, 'fail'], [34, 'fail'], [27, 'fail'], [32, 'fail']], 'due': 14, 'retry': [1, 3], 'final': 'unpaid', 'today': 42}, ['unpaid', None]), ('regression', {'events': [[13, 'fail'], [6, 'fail'], [27, 'fail'], [20, 'fail'], [6, 'fail'], [19, 'pay']], 'due': 2, 'retry': [5], 'final': 'unpaid', 'today': 28}, ['unpaid', None]), ('partial-repair probe', {'events': [[33, 'pay'], [20, 'fail'], [22, 'fail'], [34, 'fail'], [35, 'fail'], [36, 'fail']], 'due': 15, 'retry': [5], 'final': 'canceled', 'today': 41}, ['canceled', None]), ('partial-repair probe', {'events': [[32, 'pay'], [16, 'fail'], [17, 'fail']], 'due': 12, 'retry': [5], 'final': 'unpaid', 'today': 36}, ['unpaid', None]), ('normal control', {'events': [], 'due': 2, 'retry': [5], 'final': 'unpaid', 'today': 4}, ['active', None]), ('normal control', {'events': [[19, 'fail'], [32, 'fail'], [37, 'fail'], [29, 'fail'], [33, 'pay'], [42, 'fail']], 'due': 19, 'retry': [3, 5, 7], 'final': 'canceled', 'today': 34}, ['active', None]), ('normal control', {'events': [[21, 'fail'], [8, 'fail'], [4, 'fail'], [23, 'fail']], 'due': 1, 'retry': [2, 4, 8, 16], 'final': 'canceled', 'today': 15}, ['past_due', 5]), ('normal control', {'events': [[18, 'fail'], [12, 'fail'], [21, 'fail'], [19, 'fail']], 'due': 10, 'retry': [3, 5, 7], 'final': 'unpaid', 'today': 23}, ['unpaid', None])], [('regression', {'events': [[32, 'pay'], [16, 'fail'], [17, 'fail']], 'due': 12, 'retry': [5], 'final': 'unpaid', 'today': 36}, ['unpaid', None]), ('regression', {'events': [[13, 'fail'], [6, 'fail'], [27, 'fail'], [20, 'fail'], [6, 'fail'], [19, 'pay']], 'due': 2, 'retry': [5], 'final': 'unpaid', 'today': 28}, ['unpaid', None]), ('partial-repair probe', {'events': [[43, 'pay'], [34, 'fail'], [29, 'fail']], 'due': 20, 'retry': [5], 'final': 'canceled', 'today': 48}, ['canceled', None]), ('partial-repair probe', {'events': [[15, 'pay'], [6, 'fail'], [14, 'fail'], [22, 'fail'], [5, 'fail'], [15, 'fail']], 'due': 0, 'retry': [1, 3], 'final': 'unpaid', 'today': 19}, ['unpaid', None]), ('normal control', {'events': [[24, 'pay'], [14, 'fail'], [13, 'pay'], [21, 'pay'], [16, 'fail'], [6, 'fail']], 'due': 5, 'retry': [2, 4, 8, 16], 'final': 'unpaid', 'today': 35}, ['active', None]), ('normal control', {'events': [[4, 'fail'], [11, 'fail']], 'due': 3, 'retry': [5], 'final': 'canceled', 'today': 8}, ['past_due', 8]), ('normal control', {'events': [], 'due': 5, 'retry': [2, 4, 8, 16], 'final': 'canceled', 'today': 24}, ['active', None]), ('normal control', {'events': [[15, 'pay'], [8, 'pay'], [23, 'fail'], [23, 'fail']], 'due': 2, 'retry': [3, 5, 7], 'final': 'unpaid', 'today': 9}, ['active', None])], [('regression', {'events': [[15, 'pay'], [6, 'fail'], [14, 'fail'], [22, 'fail'], [5, 'fail'], [15, 'fail']], 'due': 0, 'retry': [1, 3], 'final': 'unpaid', 'today': 19}, ['unpaid', None]), ('regression', {'events': [[20, 'fail'], [27, 'pay'], [16, 'fail'], [22, 'fail'], [23, 'fail'], [23, 'fail']], 'due': 6, 'retry': [1, 3], 'final': 'unpaid', 'today': 34}, ['unpaid', None]), ('partial-repair probe', {'events': [[37, 'pay'], [38, 'fail'], [34, 'fail'], [27, 'fail'], [32, 'fail']], 'due': 14, 'retry': [1, 3], 'final': 'unpaid', 'today': 42}, ['unpaid', None]), ('partial-repair probe', {'events': [[33, 'pay'], [20, 'fail'], [22, 'fail'], [34, 'fail'], [35, 'fail'], [36, 'fail']], 'due': 15, 'retry': [5], 'final': 'canceled', 'today': 41}, ['canceled', None]), ('normal control', {'events': [[5, 'pay']], 'due': 3, 'retry': [1, 3], 'final': 'canceled', 'today': 18}, ['active', None]), ('normal control', {'events': [[17, 'fail'], [31, 'pay']], 'due': 8, 'retry': [2, 4, 8, 16], 'final': 'unpaid', 'today': 16}, ['active', None]), ('normal control', {'events': [[5, 'pay'], [15, 'fail']], 'due': 0, 'retry': [1, 3], 'final': 'unpaid', 'today': 2}, ['active', None]), ('normal control', {'events': [[15, 'fail']], 'due': 1, 'retry': [1, 3], 'final': 'canceled', 'today': 14}, ['active', None])], [('regression', {'events': [[37, 'pay'], [38, 'fail'], [34, 'fail'], [27, 'fail'], [32, 'fail']], 'due': 14, 'retry': [1, 3], 'final': 'unpaid', 'today': 42}, ['unpaid', None]), ('regression', {'events': [[21, 'fail'], [21, 'fail'], [28, 'fail'], [21, 'fail'], [21, 'pay'], [39, 'fail']], 'due': 14, 'retry': [5], 'final': 'unpaid', 'today': 25}, ['unpaid', None]), ('partial-repair probe', {'events': [[33, 'pay'], [20, 'fail'], [22, 'fail'], [34, 'fail'], [35, 'fail'], [36, 'fail']], 'due': 15, 'retry': [5], 'final': 'canceled', 'today': 41}, ['canceled', None]), ('partial-repair probe', {'events': [[32, 'pay'], [16, 'fail'], [17, 'fail']], 'due': 12, 'retry': [5], 'final': 'unpaid', 'today': 36}, ['unpaid', None]), ('normal control', {'events': [], 'due': 13, 'retry': [2, 4, 8, 16], 'final': 'unpaid', 'today': 26}, ['active', None]), ('normal control', {'events': [[22, 'fail'], [10, 'pay'], [11, 'fail'], [25, 'fail'], [15, 'fail'], [16, 'fail']], 'due': 10, 'retry': [1, 3], 'final': 'unpaid', 'today': 39}, ['active', None]), ('normal control', {'events': [[21, 'fail'], [22, 'pay'], [30, 'fail'], [27, 'fail']], 'due': 16, 'retry': [5], 'final': 'canceled', 'today': 32}, ['active', None]), ('normal control', {'events': [[28, 'fail']], 'due': 17, 'retry': [1, 3], 'final': 'unpaid', 'today': 21}, ['active', None])], [('regression', {'events': [[32, 'pay'], [16, 'fail'], [17, 'fail']], 'due': 12, 'retry': [5], 'final': 'unpaid', 'today': 36}, ['unpaid', None]), ('regression', {'events': [[15, 'pay'], [6, 'fail'], [14, 'fail'], [22, 'fail'], [5, 'fail'], [15, 'fail']], 'due': 0, 'retry': [1, 3], 'final': 'unpaid', 'today': 19}, ['unpaid', None]), ('partial-repair probe', {'events': [[43, 'pay'], [34, 'fail'], [29, 'fail']], 'due': 20, 'retry': [5], 'final': 'canceled', 'today': 48}, ['canceled', None]), ('partial-repair probe', {'events': [[37, 'pay'], [38, 'fail'], [34, 'fail'], [27, 'fail'], [32, 'fail']], 'due': 14, 'retry': [1, 3], 'final': 'unpaid', 'today': 42}, ['unpaid', None]), ('normal control', {'events': [[25, 'fail'], [22, 'fail']], 'due': 19, 'retry': [2, 4, 8, 16], 'final': 'unpaid', 'today': 41}, ['past_due', 23]), ('normal control', {'events': [[27, 'pay'], [21, 'fail'], [28, 'fail'], [31, 'fail'], [19, 'pay'], [21, 'fail']], 'due': 15, 'retry': [2, 4, 8, 16], 'final': 'unpaid', 'today': 39}, ['active', None]), ('normal control', {'events': [], 'due': 1, 'retry': [2, 4, 8, 16], 'final': 'canceled', 'today': 30}, ['active', None]), ('normal control', {'events': [[8, 'fail'], [9, 'fail'], [33, 'pay']], 'due': 8, 'retry': [3, 5, 7], 'final': 'unpaid', 'today': 8}, ['past_due', 11])]]\nfor i, (label, args, expected) in enumerate(fixtures[N-1]):\n    check(\"%s %d\" % (label, i), 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":"a48d26521362bba834a930928803c2da58b2d39b2121a32a7f32f604cd2f1354","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(x):\n    status = 'active'\n    fails = 0\n    nxt = None\n    for day, kind in sorted(x['events'], key=lambda e: e[0]):\n        if day > x['today']:\n            break\n        if status == 'canceled':\n            break\n        if kind == 'pay':\n            status = 'active'; nxt = None; break\n        fails += 1\n        if fails > len(x['retry']):\n            status = x['final']; nxt = None\n        else:\n            status = 'past_due'; nxt = x['due'] + x['retry'][fails - 1]\n    return [status, nxt]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[('regression', {'events': [[37, 'pay'], [38, 'fail'], [34, 'fail'], [27, 'fail'], [32, 'fail']], 'due': 14, 'retry': [1, 3], 'final': 'unpaid', 'today': 42}, ['unpaid', None]), ('regression', {'events': [[13, 'fail'], [6, 'fail'], [27, 'fail'], [20, 'fail'], [6, 'fail'], [19, 'pay']], 'due': 2, 'retry': [5], 'final': 'unpaid', 'today': 28}, ['unpaid', None]), ('partial-repair probe', {'events': [[33, 'pay'], [20, 'fail'], [22, 'fail'], [34, 'fail'], [35, 'fail'], [36, 'fail']], 'due': 15, 'retry': [5], 'final': 'canceled', 'today': 41}, ['canceled', None]), ('partial-repair probe', {'events': [[32, 'pay'], [16, 'fail'], [17, 'fail']], 'due': 12, 'retry': [5], 'final': 'unpaid', 'today': 36}, ['unpaid', None]), ('normal control', {'events': [], 'due': 2, 'retry': [5], 'final': 'unpaid', 'today': 4}, ['active', None]), ('normal control', {'events': [[19, 'fail'], [32, 'fail'], [37, 'fail'], [29, 'fail'], [33, 'pay'], [42, 'fail']], 'due': 19, 'retry': [3, 5, 7], 'final': 'canceled', 'today': 34}, ['active', None]), ('normal control', {'events': [[21, 'fail'], [8, 'fail'], [4, 'fail'], [23, 'fail']], 'due': 1, 'retry': [2, 4, 8, 16], 'final': 'canceled', 'today': 15}, ['past_due', 5]), ('normal control', {'events': [[18, 'fail'], [12, 'fail'], [21, 'fail'], [19, 'fail']], 'due': 10, 'retry': [3, 5, 7], 'final': 'unpaid', 'today': 23}, ['unpaid', None])], [('regression', {'events': [[32, 'pay'], [16, 'fail'], [17, 'fail']], 'due': 12, 'retry': [5], 'final': 'unpaid', 'today': 36}, ['unpaid', None]), ('regression', {'events': [[13, 'fail'], [6, 'fail'], [27, 'fail'], [20, 'fail'], [6, 'fail'], [19, 'pay']], 'due': 2, 'retry': [5], 'final': 'unpaid', 'today': 28}, ['unpaid', None]), ('partial-repair probe', {'events': [[43, 'pay'], [34, 'fail'], [29, 'fail']], 'due': 20, 'retry': [5], 'final': 'canceled', 'today': 48}, ['canceled', None]), ('partial-repair probe', {'events': [[15, 'pay'], [6, 'fail'], [14, 'fail'], [22, 'fail'], [5, 'fail'], [15, 'fail']], 'due': 0, 'retry': [1, 3], 'final': 'unpaid', 'today': 19}, ['unpaid', None]), ('normal control', {'events': [[24, 'pay'], [14, 'fail'], [13, 'pay'], [21, 'pay'], [16, 'fail'], [6, 'fail']], 'due': 5, 'retry': [2, 4, 8, 16], 'final': 'unpaid', 'today': 35}, ['active', None]), ('normal control', {'events': [[4, 'fail'], [11, 'fail']], 'due': 3, 'retry': [5], 'final': 'canceled', 'today': 8}, ['past_due', 8]), ('normal control', {'events': [], 'due': 5, 'retry': [2, 4, 8, 16], 'final': 'canceled', 'today': 24}, ['active', None]), ('normal control', {'events': [[15, 'pay'], [8, 'pay'], [23, 'fail'], [23, 'fail']], 'due': 2, 'retry': [3, 5, 7], 'final': 'unpaid', 'today': 9}, ['active', None])], [('regression', {'events': [[15, 'pay'], [6, 'fail'], [14, 'fail'], [22, 'fail'], [5, 'fail'], [15, 'fail']], 'due': 0, 'retry': [1, 3], 'final': 'unpaid', 'today': 19}, ['unpaid', None]), ('regression', {'events': [[20, 'fail'], [27, 'pay'], [16, 'fail'], [22, 'fail'], [23, 'fail'], [23, 'fail']], 'due': 6, 'retry': [1, 3], 'final': 'unpaid', 'today': 34}, ['unpaid', None]), ('partial-repair probe', {'events': [[37, 'pay'], [38, 'fail'], [34, 'fail'], [27, 'fail'], [32, 'fail']], 'due': 14, 'retry': [1, 3], 'final': 'unpaid', 'today': 42}, ['unpaid', None]), ('partial-repair probe', {'events': [[33, 'pay'], [20, 'fail'], [22, 'fail'], [34, 'fail'], [35, 'fail'], [36, 'fail']], 'due': 15, 'retry': [5], 'final': 'canceled', 'today': 41}, ['canceled', None]), ('normal control', {'events': [[5, 'pay']], 'due': 3, 'retry': [1, 3], 'final': 'canceled', 'today': 18}, ['active', None]), ('normal control', {'events': [[17, 'fail'], [31, 'pay']], 'due': 8, 'retry': [2, 4, 8, 16], 'final': 'unpaid', 'today': 16}, ['active', None]), ('normal control', {'events': [[5, 'pay'], [15, 'fail']], 'due': 0, 'retry': [1, 3], 'final': 'unpaid', 'today': 2}, ['active', None]), ('normal control', {'events': [[15, 'fail']], 'due': 1, 'retry': [1, 3], 'final': 'canceled', 'today': 14}, ['active', None])], [('regression', {'events': [[37, 'pay'], [38, 'fail'], [34, 'fail'], [27, 'fail'], [32, 'fail']], 'due': 14, 'retry': [1, 3], 'final': 'unpaid', 'today': 42}, ['unpaid', None]), ('regression', {'events': [[21, 'fail'], [21, 'fail'], [28, 'fail'], [21, 'fail'], [21, 'pay'], [39, 'fail']], 'due': 14, 'retry': [5], 'final': 'unpaid', 'today': 25}, ['unpaid', None]), ('partial-repair probe', {'events': [[33, 'pay'], [20, 'fail'], [22, 'fail'], [34, 'fail'], [35, 'fail'], [36, 'fail']], 'due': 15, 'retry': [5], 'final': 'canceled', 'today': 41}, ['canceled', None]), ('partial-repair probe', {'events': [[32, 'pay'], [16, 'fail'], [17, 'fail']], 'due': 12, 'retry': [5], 'final': 'unpaid', 'today': 36}, ['unpaid', None]), ('normal control', {'events': [], 'due': 13, 'retry': [2, 4, 8, 16], 'final': 'unpaid', 'today': 26}, ['active', None]), ('normal control', {'events': [[22, 'fail'], [10, 'pay'], [11, 'fail'], [25, 'fail'], [15, 'fail'], [16, 'fail']], 'due': 10, 'retry': [1, 3], 'final': 'unpaid', 'today': 39}, ['active', None]), ('normal control', {'events': [[21, 'fail'], [22, 'pay'], [30, 'fail'], [27, 'fail']], 'due': 16, 'retry': [5], 'final': 'canceled', 'today': 32}, ['active', None]), ('normal control', {'events': [[28, 'fail']], 'due': 17, 'retry': [1, 3], 'final': 'unpaid', 'today': 21}, ['active', None])], [('regression', {'events': [[32, 'pay'], [16, 'fail'], [17, 'fail']], 'due': 12, 'retry': [5], 'final': 'unpaid', 'today': 36}, ['unpaid', None]), ('regression', {'events': [[15, 'pay'], [6, 'fail'], [14, 'fail'], [22, 'fail'], [5, 'fail'], [15, 'fail']], 'due': 0, 'retry': [1, 3], 'final': 'unpaid', 'today': 19}, ['unpaid', None]), ('partial-repair probe', {'events': [[43, 'pay'], [34, 'fail'], [29, 'fail']], 'due': 20, 'retry': [5], 'final': 'canceled', 'today': 48}, ['canceled', None]), ('partial-repair probe', {'events': [[37, 'pay'], [38, 'fail'], [34, 'fail'], [27, 'fail'], [32, 'fail']], 'due': 14, 'retry': [1, 3], 'final': 'unpaid', 'today': 42}, ['unpaid', None]), ('normal control', {'events': [[25, 'fail'], [22, 'fail']], 'due': 19, 'retry': [2, 4, 8, 16], 'final': 'unpaid', 'today': 41}, ['past_due', 23]), ('normal control', {'events': [[27, 'pay'], [21, 'fail'], [28, 'fail'], [31, 'fail'], [19, 'pay'], [21, 'fail']], 'due': 15, 'retry': [2, 4, 8, 16], 'final': 'unpaid', 'today': 39}, ['active', None]), ('normal control', {'events': [], 'due': 1, 'retry': [2, 4, 8, 16], 'final': 'canceled', 'today': 30}, ['active', None]), ('normal control', {'events': [[8, 'fail'], [9, 'fail'], [33, 'pay']], 'due': 8, 'retry': [3, 5, 7], 'final': 'unpaid', 'today': 8}, ['past_due', 11])]]\nfor i, (label, args, expected) in enumerate(fixtures[N-1]):\n    check(\"%s %d\" % (label, i), 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":"13eb32799ddc0f51c829eebbb674023bcdb6b2f19c39af436b86dd187e997eb4","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(x):\n    status = 'active'\n    fails = 0\n    nxt = None\n    for day, kind in sorted(x['events'], key=lambda e: e[0]):\n        if day > x['today']:\n            break\n        if status in ('canceled', 'unpaid'):\n            break\n        if kind == 'pay':\n            status = 'active'; nxt = None; break\n        fails += 1\n        if fails > len(x['retry']):\n            status = x['final']; nxt = None\n        else:\n            status = 'past_due'; nxt = x['due'] + x['retry'][fails - 1]\n    return [status, nxt]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[('regression', {'events': [[37, 'pay'], [38, 'fail'], [34, 'fail'], [27, 'fail'], [32, 'fail']], 'due': 14, 'retry': [1, 3], 'final': 'unpaid', 'today': 42}, ['unpaid', None]), ('regression', {'events': [[13, 'fail'], [6, 'fail'], [27, 'fail'], [20, 'fail'], [6, 'fail'], [19, 'pay']], 'due': 2, 'retry': [5], 'final': 'unpaid', 'today': 28}, ['unpaid', None]), ('partial-repair probe', {'events': [[33, 'pay'], [20, 'fail'], [22, 'fail'], [34, 'fail'], [35, 'fail'], [36, 'fail']], 'due': 15, 'retry': [5], 'final': 'canceled', 'today': 41}, ['canceled', None]), ('partial-repair probe', {'events': [[32, 'pay'], [16, 'fail'], [17, 'fail']], 'due': 12, 'retry': [5], 'final': 'unpaid', 'today': 36}, ['unpaid', None]), ('normal control', {'events': [], 'due': 2, 'retry': [5], 'final': 'unpaid', 'today': 4}, ['active', None]), ('normal control', {'events': [[19, 'fail'], [32, 'fail'], [37, 'fail'], [29, 'fail'], [33, 'pay'], [42, 'fail']], 'due': 19, 'retry': [3, 5, 7], 'final': 'canceled', 'today': 34}, ['active', None]), ('normal control', {'events': [[21, 'fail'], [8, 'fail'], [4, 'fail'], [23, 'fail']], 'due': 1, 'retry': [2, 4, 8, 16], 'final': 'canceled', 'today': 15}, ['past_due', 5]), ('normal control', {'events': [[18, 'fail'], [12, 'fail'], [21, 'fail'], [19, 'fail']], 'due': 10, 'retry': [3, 5, 7], 'final': 'unpaid', 'today': 23}, ['unpaid', None])], [('regression', {'events': [[32, 'pay'], [16, 'fail'], [17, 'fail']], 'due': 12, 'retry': [5], 'final': 'unpaid', 'today': 36}, ['unpaid', None]), ('regression', {'events': [[13, 'fail'], [6, 'fail'], [27, 'fail'], [20, 'fail'], [6, 'fail'], [19, 'pay']], 'due': 2, 'retry': [5], 'final': 'unpaid', 'today': 28}, ['unpaid', None]), ('partial-repair probe', {'events': [[43, 'pay'], [34, 'fail'], [29, 'fail']], 'due': 20, 'retry': [5], 'final': 'canceled', 'today': 48}, ['canceled', None]), ('partial-repair probe', {'events': [[15, 'pay'], [6, 'fail'], [14, 'fail'], [22, 'fail'], [5, 'fail'], [15, 'fail']], 'due': 0, 'retry': [1, 3], 'final': 'unpaid', 'today': 19}, ['unpaid', None]), ('normal control', {'events': [[24, 'pay'], [14, 'fail'], [13, 'pay'], [21, 'pay'], [16, 'fail'], [6, 'fail']], 'due': 5, 'retry': [2, 4, 8, 16], 'final': 'unpaid', 'today': 35}, ['active', None]), ('normal control', {'events': [[4, 'fail'], [11, 'fail']], 'due': 3, 'retry': [5], 'final': 'canceled', 'today': 8}, ['past_due', 8]), ('normal control', {'events': [], 'due': 5, 'retry': [2, 4, 8, 16], 'final': 'canceled', 'today': 24}, ['active', None]), ('normal control', {'events': [[15, 'pay'], [8, 'pay'], [23, 'fail'], [23, 'fail']], 'due': 2, 'retry': [3, 5, 7], 'final': 'unpaid', 'today': 9}, ['active', None])], [('regression', {'events': [[15, 'pay'], [6, 'fail'], [14, 'fail'], [22, 'fail'], [5, 'fail'], [15, 'fail']], 'due': 0, 'retry': [1, 3], 'final': 'unpaid', 'today': 19}, ['unpaid', None]), ('regression', {'events': [[20, 'fail'], [27, 'pay'], [16, 'fail'], [22, 'fail'], [23, 'fail'], [23, 'fail']], 'due': 6, 'retry': [1, 3], 'final': 'unpaid', 'today': 34}, ['unpaid', None]), ('partial-repair probe', {'events': [[37, 'pay'], [38, 'fail'], [34, 'fail'], [27, 'fail'], [32, 'fail']], 'due': 14, 'retry': [1, 3], 'final': 'unpaid', 'today': 42}, ['unpaid', None]), ('partial-repair probe', {'events': [[33, 'pay'], [20, 'fail'], [22, 'fail'], [34, 'fail'], [35, 'fail'], [36, 'fail']], 'due': 15, 'retry': [5], 'final': 'canceled', 'today': 41}, ['canceled', None]), ('normal control', {'events': [[5, 'pay']], 'due': 3, 'retry': [1, 3], 'final': 'canceled', 'today': 18}, ['active', None]), ('normal control', {'events': [[17, 'fail'], [31, 'pay']], 'due': 8, 'retry': [2, 4, 8, 16], 'final': 'unpaid', 'today': 16}, ['active', None]), ('normal control', {'events': [[5, 'pay'], [15, 'fail']], 'due': 0, 'retry': [1, 3], 'final': 'unpaid', 'today': 2}, ['active', None]), ('normal control', {'events': [[15, 'fail']], 'due': 1, 'retry': [1, 3], 'final': 'canceled', 'today': 14}, ['active', None])], [('regression', {'events': [[37, 'pay'], [38, 'fail'], [34, 'fail'], [27, 'fail'], [32, 'fail']], 'due': 14, 'retry': [1, 3], 'final': 'unpaid', 'today': 42}, ['unpaid', None]), ('regression', {'events': [[21, 'fail'], [21, 'fail'], [28, 'fail'], [21, 'fail'], [21, 'pay'], [39, 'fail']], 'due': 14, 'retry': [5], 'final': 'unpaid', 'today': 25}, ['unpaid', None]), ('partial-repair probe', {'events': [[33, 'pay'], [20, 'fail'], [22, 'fail'], [34, 'fail'], [35, 'fail'], [36, 'fail']], 'due': 15, 'retry': [5], 'final': 'canceled', 'today': 41}, ['canceled', None]), ('partial-repair probe', {'events': [[32, 'pay'], [16, 'fail'], [17, 'fail']], 'due': 12, 'retry': [5], 'final': 'unpaid', 'today': 36}, ['unpaid', None]), ('normal control', {'events': [], 'due': 13, 'retry': [2, 4, 8, 16], 'final': 'unpaid', 'today': 26}, ['active', None]), ('normal control', {'events': [[22, 'fail'], [10, 'pay'], [11, 'fail'], [25, 'fail'], [15, 'fail'], [16, 'fail']], 'due': 10, 'retry': [1, 3], 'final': 'unpaid', 'today': 39}, ['active', None]), ('normal control', {'events': [[21, 'fail'], [22, 'pay'], [30, 'fail'], [27, 'fail']], 'due': 16, 'retry': [5], 'final': 'canceled', 'today': 32}, ['active', None]), ('normal control', {'events': [[28, 'fail']], 'due': 17, 'retry': [1, 3], 'final': 'unpaid', 'today': 21}, ['active', None])], [('regression', {'events': [[32, 'pay'], [16, 'fail'], [17, 'fail']], 'due': 12, 'retry': [5], 'final': 'unpaid', 'today': 36}, ['unpaid', None]), ('regression', {'events': [[15, 'pay'], [6, 'fail'], [14, 'fail'], [22, 'fail'], [5, 'fail'], [15, 'fail']], 'due': 0, 'retry': [1, 3], 'final': 'unpaid', 'today': 19}, ['unpaid', None]), ('partial-repair probe', {'events': [[43, 'pay'], [34, 'fail'], [29, 'fail']], 'due': 20, 'retry': [5], 'final': 'canceled', 'today': 48}, ['canceled', None]), ('partial-repair probe', {'events': [[37, 'pay'], [38, 'fail'], [34, 'fail'], [27, 'fail'], [32, 'fail']], 'due': 14, 'retry': [1, 3], 'final': 'unpaid', 'today': 42}, ['unpaid', None]), ('normal control', {'events': [[25, 'fail'], [22, 'fail']], 'due': 19, 'retry': [2, 4, 8, 16], 'final': 'unpaid', 'today': 41}, ['past_due', 23]), ('normal control', {'events': [[27, 'pay'], [21, 'fail'], [28, 'fail'], [31, 'fail'], [19, 'pay'], [21, 'fail']], 'due': 15, 'retry': [2, 4, 8, 16], 'final': 'unpaid', 'today': 39}, ['active', None]), ('normal control', {'events': [], 'due': 1, 'retry': [2, 4, 8, 16], 'final': 'canceled', 'today': 30}, ['active', None]), ('normal control', {'events': [[8, 'fail'], [9, 'fail'], [33, 'pay']], 'due': 8, 'retry': [3, 5, 7], 'final': 'unpaid', 'today': 8}, ['past_due', 11])]]\nfor i, (label, args, expected) in enumerate(fixtures[N-1]):\n    check(\"%s %d\" % (label, i), 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 teaching model of a stipulated billing rule. It makes no claim to reproduce any billing provider's exact behaviour and is not billing software. 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-subscription-proration-dunning-retry-state-terminal-status-stop","generated_at":"2026-09-29T14:46:37.851187+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"Payment retries drive subscription status; off-by-one retry counting cancels customers early or never.","repair":"Restore the contract rule at the terminal status stop step: use `if status in ('canceled', 'unpaid'):\n        break`.","root_cause":"Only the canceled status stops processing; unpaid is not treated as terminal.","sha256":"db2177ab5141b1a4087e26c8929af784d89a31db52a2106a7a7719a6903bb7bb","title":"Dunning retry schedule and status: terminal status stop · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":42.803,"exit_code":1,"observations":[{"actual":["active",null],"check":"regression 0","expected":["unpaid",null],"passed":false},{"actual":["unpaid",null],"check":"regression 1","expected":["unpaid",null],"passed":true},{"actual":["active",null],"check":"partial-repair probe 2","expected":["canceled",null],"passed":false},{"actual":["active",null],"check":"partial-repair probe 3","expected":["unpaid",null],"passed":false},{"actual":["active",null],"check":"normal control 4","expected":["active",null],"passed":true},{"actual":["active",null],"check":"normal control 5","expected":["active",null],"passed":true},{"actual":["past_due",5],"check":"normal control 6","expected":["past_due",5],"passed":true},{"actual":["unpaid",null],"check":"normal control 7","expected":["unpaid",null],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"regression 0\", \"actual\": [\"active\", null], \"expected\": [\"unpaid\", null], \"passed\": false}, {\"check\": \"regression 1\", \"actual\": [\"unpaid\", null], \"expected\": [\"unpaid\", null], \"passed\": true}, {\"check\": \"partial-repair probe 2\", \"actual\": [\"active\", null], \"expected\": [\"canceled\", null], \"passed\": false}, {\"check\": \"partial-repair probe 3\", \"actual\": [\"active\", null], \"expected\": [\"unpaid\", null], \"passed\": false}, {\"check\": \"normal control 4\", \"actual\": [\"active\", null], \"expected\": [\"active\", null], \"passed\": true}, {\"check\": \"normal control 5\", \"actual\": [\"active\", null], \"expected\": [\"active\", null], \"passed\": true}, {\"check\": \"normal control 6\", \"actual\": [\"past_due\", 5], \"expected\": [\"past_due\", 5], \"passed\": true}, {\"check\": \"normal control 7\", \"actual\": [\"unpaid\", null], \"expected\": [\"unpaid\", null], \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":40.556,"exit_code":1,"observations":[{"actual":["active",null],"check":"regression 0","expected":["unpaid",null],"passed":false},{"actual":["active",null],"check":"regression 1","expected":["unpaid",null],"passed":false},{"actual":["canceled",null],"check":"partial-repair probe 2","expected":["canceled",null],"passed":true},{"actual":["active",null],"check":"partial-repair probe 3","expected":["unpaid",null],"passed":false},{"actual":["active",null],"check":"normal control 4","expected":["active",null],"passed":true},{"actual":["active",null],"check":"normal control 5","expected":["active",null],"passed":true},{"actual":["past_due",5],"check":"normal control 6","expected":["past_due",5],"passed":true},{"actual":["unpaid",null],"check":"normal control 7","expected":["unpaid",null],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"regression 0\", \"actual\": [\"active\", null], \"expected\": [\"unpaid\", null], \"passed\": false}, {\"check\": \"regression 1\", \"actual\": [\"active\", null], \"expected\": [\"unpaid\", null], \"passed\": false}, {\"check\": \"partial-repair probe 2\", \"actual\": [\"canceled\", null], \"expected\": [\"canceled\", null], \"passed\": true}, {\"check\": \"partial-repair probe 3\", \"actual\": [\"active\", null], \"expected\": [\"unpaid\", null], \"passed\": false}, {\"check\": \"normal control 4\", \"actual\": [\"active\", null], \"expected\": [\"active\", null], \"passed\": true}, {\"check\": \"normal control 5\", \"actual\": [\"active\", null], \"expected\": [\"active\", null], \"passed\": true}, {\"check\": \"normal control 6\", \"actual\": [\"past_due\", 5], \"expected\": [\"past_due\", 5], \"passed\": true}, {\"check\": \"normal control 7\", \"actual\": [\"unpaid\", null], \"expected\": [\"unpaid\", null], \"passed\": true}], \"passed\": false}\n"},"fixed":{"elapsed_ms":41.458,"exit_code":0,"observations":[{"actual":["unpaid",null],"check":"regression 0","expected":["unpaid",null],"passed":true},{"actual":["unpaid",null],"check":"regression 1","expected":["unpaid",null],"passed":true},{"actual":["canceled",null],"check":"partial-repair probe 2","expected":["canceled",null],"passed":true},{"actual":["unpaid",null],"check":"partial-repair probe 3","expected":["unpaid",null],"passed":true},{"actual":["active",null],"check":"normal control 4","expected":["active",null],"passed":true},{"actual":["active",null],"check":"normal control 5","expected":["active",null],"passed":true},{"actual":["past_due",5],"check":"normal control 6","expected":["past_due",5],"passed":true},{"actual":["unpaid",null],"check":"normal control 7","expected":["unpaid",null],"passed":true}],"passed":true,"stderr":"","stdout":"{\"observations\": [{\"check\": \"regression 0\", \"actual\": [\"unpaid\", null], \"expected\": [\"unpaid\", null], \"passed\": true}, {\"check\": \"regression 1\", \"actual\": [\"unpaid\", null], \"expected\": [\"unpaid\", null], \"passed\": true}, {\"check\": \"partial-repair probe 2\", \"actual\": [\"canceled\", null], \"expected\": [\"canceled\", null], \"passed\": true}, {\"check\": \"partial-repair probe 3\", \"actual\": [\"unpaid\", null], \"expected\": [\"unpaid\", null], \"passed\": true}, {\"check\": \"normal control 4\", \"actual\": [\"active\", null], \"expected\": [\"active\", null], \"passed\": true}, {\"check\": \"normal control 5\", \"actual\": [\"active\", null], \"expected\": [\"active\", null], \"passed\": true}, {\"check\": \"normal control 6\", \"actual\": [\"past_due\", 5], \"expected\": [\"past_due\", 5], \"passed\": true}, {\"check\": \"normal control 7\", \"actual\": [\"unpaid\", null], \"expected\": [\"unpaid\", null], \"passed\": true}], \"passed\": true}\n"}},"verified":true,"visibility":"public"}