{"abstract":"Settled customers are listed as having credit balances.","category":"Double-entry ledger accounting","checks":7,"contract":"x = {'control': [[day, amount]], 'sub': {customer: [[day, amount]]}, 'as_of': day}. Only rows dated on or before as_of count. The subledger total nets every customer balance, including credit (negative) balances. Return {'control', 'subledger', 'difference': control - subledger, 'credit_balances': customers with negative balance sorted by name, 'open_customers': count of nonzero balances}.","contract_signature":"x","evaluation_group":"w2-double-entry-ledger-accounting-subledger-control-tieout","failed_approach":"Sorting by balance amount instead of name reorders the list.","family":"w2-double-entry-ledger-accounting-subledger-control-tieout-credit-balance-threshold","id":"FA-58276","implementations":{"attempt":{"sha256":"18e2f602c97d077dfefd0f078c4149384e7419776513e1a952a712a7bab8262c","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(x):\n    cut = x['as_of']\n    control = sum(a for d, a in x['control'] if d <= cut)\n    per = {}\n    for cust, rows in x['sub'].items():\n        per[cust] = sum(a for d, a in rows if d <= cut)\n    sub_total = sum(per.values())\n    credit = sorted((c for c, v in per.items() if v < 0), key=lambda c: per[c])\n    return {'control': control, 'subledger': sub_total, 'difference': control - sub_total, 'credit_balances': credit, 'open_customers': sum(1 for v in per.values() if v != 0)}\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[['regression: credit balance threshold', {'control': [[5, 100], [19, -80], [21, -80]], 'sub': {'bolt': [[5, -80], [1, 250], [5, -80]], 'acme': [[21, 100]], 'dyna': [[20, 400], [1, 250], [20, 100]], 'crux': [[20, 400], [5, 100]]}, 'as_of': 20}, {'control': 20, 'subledger': 1340, 'difference': -1320, 'credit_balances': [], 'open_customers': 3}], ['regression: credit balance threshold, partial-repair probe', {'control': [[32, -80], [30, -80], [32, 250], [30, 400]], 'sub': {'crux': [[1, -300]], 'acme': [[31, -300]], 'dyna': [[32, 100], [32, 250]], 'bolt': [[32, -80]]}, 'as_of': 31}, {'control': 320, 'subledger': -600, 'difference': 920, 'credit_balances': ['acme', 'crux'], 'open_customers': 2}], ['control 1', {'control': [[21, 400], [5, 250], [19, 250], [20, 400], [19, -80]], 'sub': {'bolt': [[5, 250]]}, 'as_of': 20}, {'control': 820, 'subledger': 250, 'difference': 570, 'credit_balances': [], 'open_customers': 1}], ['control 2', {'control': [[9, 250], [10, 100], [11, 400]], 'sub': {'dyna': [[1, 400], [11, 400]], 'acme': [[1, -300], [10, 250], [1, -80]], 'bolt': [[1, -80]]}, 'as_of': 10}, {'control': 350, 'subledger': 190, 'difference': 160, 'credit_balances': ['acme', 'bolt'], 'open_customers': 3}], ['control 3', {'control': [[9, 100], [10, 100], [9, 400], [10, 100], [1, 250], [9, 250]], 'sub': {'dyna': [[1, 400], [11, 400], [1, 400]]}, 'as_of': 10}, {'control': 1200, 'subledger': 800, 'difference': 400, 'credit_balances': [], 'open_customers': 1}], ['control 4', {'control': [[5, 100], [21, 250], [19, 400], [5, 100]], 'sub': {'dyna': [[21, -80], [21, 100], [20, 400]], 'acme': [[5, 100], [20, -80], [21, -300]], 'bolt': [[5, -80], [21, -300]]}, 'as_of': 20}, {'control': 600, 'subledger': 340, 'difference': 260, 'credit_balances': ['bolt'], 'open_customers': 3}], ['control 5', {'control': [[10, 400], [10, 100], [9, 250], [11, 250], [1, 400]], 'sub': {'bolt': [[11, 400], [10, 400], [5, 100]]}, 'as_of': 10}, {'control': 1150, 'subledger': 500, 'difference': 650, 'credit_balances': [], 'open_customers': 1}]], [['regression: credit balance threshold', {'control': [[5, 400], [20, -80], [19, 250]], 'sub': {'acme': [[21, 250]], 'bolt': [[20, 250], [1, -80], [1, -80]], 'dyna': [[21, -80], [20, 100]], 'crux': [[5, 400], [21, 400], [20, -300]]}, 'as_of': 20}, {'control': 570, 'subledger': 290, 'difference': 280, 'credit_balances': [], 'open_customers': 3}], ['regression: credit balance threshold, partial-repair probe', {'control': [[9, 100], [10, -80], [11, 250], [9, -80], [11, 400]], 'sub': {'dyna': [[10, -300], [11, -80]], 'bolt': [[1, -300]], 'acme': [[11, 100], [10, 250]], 'crux': [[11, 100], [10, -300]]}, 'as_of': 10}, {'control': -60, 'subledger': -650, 'difference': 590, 'credit_balances': ['bolt', 'crux', 'dyna'], 'open_customers': 4}], ['control 1', {'control': [[1, 400], [11, 250]], 'sub': {'dyna': [[1, 250]], 'crux': [[1, 250], [1, 250], [1, 100]], 'acme': [[10, 250], [1, 250], [11, 250]], 'bolt': [[11, 250], [5, 400]]}, 'as_of': 10}, {'control': 400, 'subledger': 1750, 'difference': -1350, 'credit_balances': [], 'open_customers': 4}], ['control 2', {'control': [[20, 250], [19, 100], [5, 400]], 'sub': {'bolt': [[20, 250]], 'acme': [[1, -300], [1, 100], [1, 250]]}, 'as_of': 20}, {'control': 750, 'subledger': 300, 'difference': 450, 'credit_balances': [], 'open_customers': 2}], ['control 3', {'control': [[10, 250], [9, -80], [1, 250], [1, 100]], 'sub': {'dyna': [[1, 400], [10, 400]], 'acme': [[10, 250], [5, 400], [11, -300]], 'crux': [[11, 250], [1, 400], [5, -300]], 'bolt': [[5, 250]]}, 'as_of': 10}, {'control': 520, 'subledger': 1800, 'difference': -1280, 'credit_balances': [], 'open_customers': 4}], ['control 4', {'control': [[5, 250], [10, 250], [1, 400], [1, -80], [11, 400]], 'sub': {'crux': [[11, 250], [11, 100], [5, 250]], 'acme': [[5, 250], [11, -300], [5, 250]], 'bolt': [[11, -300], [5, 400]], 'dyna': [[10, -300]]}, 'as_of': 10}, {'control': 820, 'subledger': 850, 'difference': -30, 'credit_balances': ['dyna'], 'open_customers': 4}], ['control 5', {'control': [[9, 250], [10, 100], [5, -80], [1, 250], [11, 100]], 'sub': {'acme': [[1, -300]], 'bolt': [[5, 400]], 'crux': [[10, -300], [11, -80]]}, 'as_of': 10}, {'control': 520, 'subledger': -200, 'difference': 720, 'credit_balances': ['acme', 'crux'], 'open_customers': 3}]], [['regression: credit balance threshold', {'control': [[5, 400], [1, 250], [5, -80], [5, 250], [11, -80], [1, 400]], 'sub': {'dyna': [[11, 100]], 'acme': [[5, 400], [1, 100]], 'crux': [[5, 400], [5, -300]]}, 'as_of': 10}, {'control': 1220, 'subledger': 600, 'difference': 620, 'credit_balances': [], 'open_customers': 2}], ['regression: credit balance threshold, partial-repair probe', {'control': [[11, 100], [11, 250], [5, 100]], 'sub': {'crux': [[5, -80], [11, 250], [5, -300]], 'dyna': [[11, 400]], 'bolt': [[5, -80], [1, -80], [5, -80]]}, 'as_of': 10}, {'control': 100, 'subledger': -620, 'difference': 720, 'credit_balances': ['bolt', 'crux'], 'open_customers': 2}], ['control 1', {'control': [[9, 250], [11, 100], [11, -80], [11, 250]], 'sub': {'dyna': [[1, 250], [11, 400], [10, -80]], 'acme': [[11, -300], [1, 400], [1, 400]], 'bolt': [[1, -300]]}, 'as_of': 10}, {'control': 250, 'subledger': 670, 'difference': -420, 'credit_balances': ['bolt'], 'open_customers': 3}], ['control 2', {'control': [[1, -80], [1, 100], [32, 400], [31, 250]], 'sub': {'bolt': [[1, 250]]}, 'as_of': 31}, {'control': 270, 'subledger': 250, 'difference': 20, 'credit_balances': [], 'open_customers': 1}], ['control 3', {'control': [[11, 100], [5, -80], [9, 400]], 'sub': {'acme': [[11, 100], [11, 250], [1, 250]], 'dyna': [[5, 100]], 'bolt': [[5, -300], [5, -300]], 'crux': [[5, 250], [11, -300], [1, 100]]}, 'as_of': 10}, {'control': 320, 'subledger': 100, 'difference': 220, 'credit_balances': ['bolt'], 'open_customers': 4}], ['control 4', {'control': [[1, -80], [5, 250], [1, 400], [21, -80], [5, 250], [5, 100]], 'sub': {'crux': [[20, -80]], 'acme': [[1, 100]], 'bolt': [[5, 400], [1, 400], [21, 250]]}, 'as_of': 20}, {'control': 920, 'subledger': 820, 'difference': 100, 'credit_balances': ['crux'], 'open_customers': 3}], ['control 5', {'control': [[11, 250], [5, 250]], 'sub': {'acme': [[1, -80], [11, 100]], 'crux': [[5, 250]], 'dyna': [[11, -300], [5, 250], [1, 250]]}, 'as_of': 10}, {'control': 250, 'subledger': 670, 'difference': -420, 'credit_balances': ['acme'], 'open_customers': 3}]], [['regression: credit balance threshold', {'control': [[31, -80], [5, 100], [31, 100]], 'sub': {'crux': [[32, 250]], 'dyna': [[32, 250]], 'acme': [[1, -300], [32, 250]]}, 'as_of': 31}, {'control': 120, 'subledger': -300, 'difference': 420, 'credit_balances': ['acme'], 'open_customers': 1}], ['regression: credit balance threshold, partial-repair probe', {'control': [[21, -80], [1, 400], [5, -80], [19, 400], [20, 400], [1, 250]], 'sub': {'crux': [[1, -80]], 'dyna': [[20, -80], [20, 400], [5, 100]], 'bolt': [[21, -300]], 'acme': [[1, -80], [21, -80]]}, 'as_of': 20}, {'control': 1370, 'subledger': 260, 'difference': 1110, 'credit_balances': ['acme', 'crux'], 'open_customers': 3}], ['control 1', {'control': [[20, -80], [21, 100]], 'sub': {'dyna': [[1, -80], [20, 250]], 'bolt': [[1, -300], [20, 400], [21, -300]]}, 'as_of': 20}, {'control': -80, 'subledger': 270, 'difference': -350, 'credit_balances': [], 'open_customers': 2}], ['control 2', {'control': [[11, -80], [11, 400], [1, 250], [10, 100], [1, 400], [1, 400]], 'sub': {'dyna': [[11, 400], [5, 100]], 'acme': [[5, -80]], 'crux': [[10, 100], [5, 400], [1, 250]], 'bolt': [[10, 250], [11, 400]]}, 'as_of': 10}, {'control': 1150, 'subledger': 1020, 'difference': 130, 'credit_balances': ['acme'], 'open_customers': 4}], ['control 3', {'control': [[5, 400], [30, 250]], 'sub': {'dyna': [[5, 250], [31, 400]], 'bolt': [[32, 400], [32, -80], [5, 250]], 'crux': [[5, -300], [1, 250], [31, -300]]}, 'as_of': 31}, {'control': 650, 'subledger': 550, 'difference': 100, 'credit_balances': ['crux'], 'open_customers': 3}], ['control 4', {'control': [[31, 250], [1, -80], [5, 100], [31, 250], [5, 100]], 'sub': {'crux': [[32, -300], [1, 250]]}, 'as_of': 31}, {'control': 620, 'subledger': 250, 'difference': 370, 'credit_balances': [], 'open_customers': 1}], ['control 5', {'control': [[31, 250], [5, -80], [1, 400], [32, 400], [1, 400]], 'sub': {'crux': [[5, 250], [1, 400]]}, 'as_of': 31}, {'control': 970, 'subledger': 650, 'difference': 320, 'credit_balances': [], 'open_customers': 1}]], [['regression: credit balance threshold', {'control': [[5, 100], [5, 250], [19, -80], [21, 250], [21, 250]], 'sub': {'crux': [[20, -80], [20, -80]], 'acme': [[21, 100]]}, 'as_of': 20}, {'control': 270, 'subledger': -160, 'difference': 430, 'credit_balances': ['crux'], 'open_customers': 1}], ['regression: credit balance threshold, partial-repair probe', {'control': [[11, -80], [10, 400], [11, -80], [1, 100], [9, 100]], 'sub': {'crux': [[5, -300], [1, -300]], 'dyna': [[5, -80]], 'bolt': [[1, -300], [10, -80], [1, 100]], 'acme': [[10, 250], [11, -80]]}, 'as_of': 10}, {'control': 600, 'subledger': -710, 'difference': 1310, 'credit_balances': ['bolt', 'crux', 'dyna'], 'open_customers': 4}], ['control 1', {'control': [[10, -80], [9, 400], [1, 250]], 'sub': {'crux': [[5, 250], [1, 400], [5, 250]], 'acme': [[10, -80]]}, 'as_of': 10}, {'control': 570, 'subledger': 820, 'difference': -250, 'credit_balances': ['acme'], 'open_customers': 2}], ['control 2', {'control': [[1, -80], [5, 100], [20, 400], [19, 250], [1, 250]], 'sub': {'crux': [[20, 250], [20, -80], [20, 250]]}, 'as_of': 20}, {'control': 920, 'subledger': 420, 'difference': 500, 'credit_balances': [], 'open_customers': 1}], ['control 3', {'control': [[5, 400], [1, 250], [9, 400], [9, 400]], 'sub': {'acme': [[1, -300], [11, -80]], 'bolt': [[1, 250], [10, 250], [5, -300]], 'dyna': [[1, -300], [10, -300], [1, 100]]}, 'as_of': 10}, {'control': 1450, 'subledger': -600, 'difference': 2050, 'credit_balances': ['acme', 'dyna'], 'open_customers': 3}], ['control 4', {'control': [[9, -80], [11, 400]], 'sub': {'bolt': [[5, 100], [5, 250]], 'acme': [[11, 100], [11, -80], [10, 250]]}, 'as_of': 10}, {'control': -80, 'subledger': 600, 'difference': -680, 'credit_balances': [], 'open_customers': 2}], ['control 5', {'control': [[1, 100], [1, 250], [5, 250], [1, 100], [1, 400], [5, -80]], 'sub': {'bolt': [[10, -80], [10, 400]], 'crux': [[1, 250], [10, 250]]}, 'as_of': 10}, {'control': 1020, 'subledger': 820, 'difference': 200, 'credit_balances': [], 'open_customers': 2}]]]\nfor label, args, expected in fixtures[N-1]:\n    try:\n        actual = solve(args)\n    except Exception as exc:\n        actual = 'raised ' + type(exc).__name__\n    check(label, actual, 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":"475056c9628451053381b3b38a07ad14c9ca4918bc22b33b853576b679634675","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(x):\n    cut = x['as_of']\n    control = sum(a for d, a in x['control'] if d <= cut)\n    per = {}\n    for cust, rows in x['sub'].items():\n        per[cust] = sum(a for d, a in rows if d <= cut)\n    sub_total = sum(per.values())\n    credit = sorted(c for c, v in per.items() if v <= 0)\n    return {'control': control, 'subledger': sub_total, 'difference': control - sub_total, 'credit_balances': credit, 'open_customers': sum(1 for v in per.values() if v != 0)}\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[['regression: credit balance threshold', {'control': [[5, 100], [19, -80], [21, -80]], 'sub': {'bolt': [[5, -80], [1, 250], [5, -80]], 'acme': [[21, 100]], 'dyna': [[20, 400], [1, 250], [20, 100]], 'crux': [[20, 400], [5, 100]]}, 'as_of': 20}, {'control': 20, 'subledger': 1340, 'difference': -1320, 'credit_balances': [], 'open_customers': 3}], ['regression: credit balance threshold, partial-repair probe', {'control': [[32, -80], [30, -80], [32, 250], [30, 400]], 'sub': {'crux': [[1, -300]], 'acme': [[31, -300]], 'dyna': [[32, 100], [32, 250]], 'bolt': [[32, -80]]}, 'as_of': 31}, {'control': 320, 'subledger': -600, 'difference': 920, 'credit_balances': ['acme', 'crux'], 'open_customers': 2}], ['control 1', {'control': [[21, 400], [5, 250], [19, 250], [20, 400], [19, -80]], 'sub': {'bolt': [[5, 250]]}, 'as_of': 20}, {'control': 820, 'subledger': 250, 'difference': 570, 'credit_balances': [], 'open_customers': 1}], ['control 2', {'control': [[9, 250], [10, 100], [11, 400]], 'sub': {'dyna': [[1, 400], [11, 400]], 'acme': [[1, -300], [10, 250], [1, -80]], 'bolt': [[1, -80]]}, 'as_of': 10}, {'control': 350, 'subledger': 190, 'difference': 160, 'credit_balances': ['acme', 'bolt'], 'open_customers': 3}], ['control 3', {'control': [[9, 100], [10, 100], [9, 400], [10, 100], [1, 250], [9, 250]], 'sub': {'dyna': [[1, 400], [11, 400], [1, 400]]}, 'as_of': 10}, {'control': 1200, 'subledger': 800, 'difference': 400, 'credit_balances': [], 'open_customers': 1}], ['control 4', {'control': [[5, 100], [21, 250], [19, 400], [5, 100]], 'sub': {'dyna': [[21, -80], [21, 100], [20, 400]], 'acme': [[5, 100], [20, -80], [21, -300]], 'bolt': [[5, -80], [21, -300]]}, 'as_of': 20}, {'control': 600, 'subledger': 340, 'difference': 260, 'credit_balances': ['bolt'], 'open_customers': 3}], ['control 5', {'control': [[10, 400], [10, 100], [9, 250], [11, 250], [1, 400]], 'sub': {'bolt': [[11, 400], [10, 400], [5, 100]]}, 'as_of': 10}, {'control': 1150, 'subledger': 500, 'difference': 650, 'credit_balances': [], 'open_customers': 1}]], [['regression: credit balance threshold', {'control': [[5, 400], [20, -80], [19, 250]], 'sub': {'acme': [[21, 250]], 'bolt': [[20, 250], [1, -80], [1, -80]], 'dyna': [[21, -80], [20, 100]], 'crux': [[5, 400], [21, 400], [20, -300]]}, 'as_of': 20}, {'control': 570, 'subledger': 290, 'difference': 280, 'credit_balances': [], 'open_customers': 3}], ['regression: credit balance threshold, partial-repair probe', {'control': [[9, 100], [10, -80], [11, 250], [9, -80], [11, 400]], 'sub': {'dyna': [[10, -300], [11, -80]], 'bolt': [[1, -300]], 'acme': [[11, 100], [10, 250]], 'crux': [[11, 100], [10, -300]]}, 'as_of': 10}, {'control': -60, 'subledger': -650, 'difference': 590, 'credit_balances': ['bolt', 'crux', 'dyna'], 'open_customers': 4}], ['control 1', {'control': [[1, 400], [11, 250]], 'sub': {'dyna': [[1, 250]], 'crux': [[1, 250], [1, 250], [1, 100]], 'acme': [[10, 250], [1, 250], [11, 250]], 'bolt': [[11, 250], [5, 400]]}, 'as_of': 10}, {'control': 400, 'subledger': 1750, 'difference': -1350, 'credit_balances': [], 'open_customers': 4}], ['control 2', {'control': [[20, 250], [19, 100], [5, 400]], 'sub': {'bolt': [[20, 250]], 'acme': [[1, -300], [1, 100], [1, 250]]}, 'as_of': 20}, {'control': 750, 'subledger': 300, 'difference': 450, 'credit_balances': [], 'open_customers': 2}], ['control 3', {'control': [[10, 250], [9, -80], [1, 250], [1, 100]], 'sub': {'dyna': [[1, 400], [10, 400]], 'acme': [[10, 250], [5, 400], [11, -300]], 'crux': [[11, 250], [1, 400], [5, -300]], 'bolt': [[5, 250]]}, 'as_of': 10}, {'control': 520, 'subledger': 1800, 'difference': -1280, 'credit_balances': [], 'open_customers': 4}], ['control 4', {'control': [[5, 250], [10, 250], [1, 400], [1, -80], [11, 400]], 'sub': {'crux': [[11, 250], [11, 100], [5, 250]], 'acme': [[5, 250], [11, -300], [5, 250]], 'bolt': [[11, -300], [5, 400]], 'dyna': [[10, -300]]}, 'as_of': 10}, {'control': 820, 'subledger': 850, 'difference': -30, 'credit_balances': ['dyna'], 'open_customers': 4}], ['control 5', {'control': [[9, 250], [10, 100], [5, -80], [1, 250], [11, 100]], 'sub': {'acme': [[1, -300]], 'bolt': [[5, 400]], 'crux': [[10, -300], [11, -80]]}, 'as_of': 10}, {'control': 520, 'subledger': -200, 'difference': 720, 'credit_balances': ['acme', 'crux'], 'open_customers': 3}]], [['regression: credit balance threshold', {'control': [[5, 400], [1, 250], [5, -80], [5, 250], [11, -80], [1, 400]], 'sub': {'dyna': [[11, 100]], 'acme': [[5, 400], [1, 100]], 'crux': [[5, 400], [5, -300]]}, 'as_of': 10}, {'control': 1220, 'subledger': 600, 'difference': 620, 'credit_balances': [], 'open_customers': 2}], ['regression: credit balance threshold, partial-repair probe', {'control': [[11, 100], [11, 250], [5, 100]], 'sub': {'crux': [[5, -80], [11, 250], [5, -300]], 'dyna': [[11, 400]], 'bolt': [[5, -80], [1, -80], [5, -80]]}, 'as_of': 10}, {'control': 100, 'subledger': -620, 'difference': 720, 'credit_balances': ['bolt', 'crux'], 'open_customers': 2}], ['control 1', {'control': [[9, 250], [11, 100], [11, -80], [11, 250]], 'sub': {'dyna': [[1, 250], [11, 400], [10, -80]], 'acme': [[11, -300], [1, 400], [1, 400]], 'bolt': [[1, -300]]}, 'as_of': 10}, {'control': 250, 'subledger': 670, 'difference': -420, 'credit_balances': ['bolt'], 'open_customers': 3}], ['control 2', {'control': [[1, -80], [1, 100], [32, 400], [31, 250]], 'sub': {'bolt': [[1, 250]]}, 'as_of': 31}, {'control': 270, 'subledger': 250, 'difference': 20, 'credit_balances': [], 'open_customers': 1}], ['control 3', {'control': [[11, 100], [5, -80], [9, 400]], 'sub': {'acme': [[11, 100], [11, 250], [1, 250]], 'dyna': [[5, 100]], 'bolt': [[5, -300], [5, -300]], 'crux': [[5, 250], [11, -300], [1, 100]]}, 'as_of': 10}, {'control': 320, 'subledger': 100, 'difference': 220, 'credit_balances': ['bolt'], 'open_customers': 4}], ['control 4', {'control': [[1, -80], [5, 250], [1, 400], [21, -80], [5, 250], [5, 100]], 'sub': {'crux': [[20, -80]], 'acme': [[1, 100]], 'bolt': [[5, 400], [1, 400], [21, 250]]}, 'as_of': 20}, {'control': 920, 'subledger': 820, 'difference': 100, 'credit_balances': ['crux'], 'open_customers': 3}], ['control 5', {'control': [[11, 250], [5, 250]], 'sub': {'acme': [[1, -80], [11, 100]], 'crux': [[5, 250]], 'dyna': [[11, -300], [5, 250], [1, 250]]}, 'as_of': 10}, {'control': 250, 'subledger': 670, 'difference': -420, 'credit_balances': ['acme'], 'open_customers': 3}]], [['regression: credit balance threshold', {'control': [[31, -80], [5, 100], [31, 100]], 'sub': {'crux': [[32, 250]], 'dyna': [[32, 250]], 'acme': [[1, -300], [32, 250]]}, 'as_of': 31}, {'control': 120, 'subledger': -300, 'difference': 420, 'credit_balances': ['acme'], 'open_customers': 1}], ['regression: credit balance threshold, partial-repair probe', {'control': [[21, -80], [1, 400], [5, -80], [19, 400], [20, 400], [1, 250]], 'sub': {'crux': [[1, -80]], 'dyna': [[20, -80], [20, 400], [5, 100]], 'bolt': [[21, -300]], 'acme': [[1, -80], [21, -80]]}, 'as_of': 20}, {'control': 1370, 'subledger': 260, 'difference': 1110, 'credit_balances': ['acme', 'crux'], 'open_customers': 3}], ['control 1', {'control': [[20, -80], [21, 100]], 'sub': {'dyna': [[1, -80], [20, 250]], 'bolt': [[1, -300], [20, 400], [21, -300]]}, 'as_of': 20}, {'control': -80, 'subledger': 270, 'difference': -350, 'credit_balances': [], 'open_customers': 2}], ['control 2', {'control': [[11, -80], [11, 400], [1, 250], [10, 100], [1, 400], [1, 400]], 'sub': {'dyna': [[11, 400], [5, 100]], 'acme': [[5, -80]], 'crux': [[10, 100], [5, 400], [1, 250]], 'bolt': [[10, 250], [11, 400]]}, 'as_of': 10}, {'control': 1150, 'subledger': 1020, 'difference': 130, 'credit_balances': ['acme'], 'open_customers': 4}], ['control 3', {'control': [[5, 400], [30, 250]], 'sub': {'dyna': [[5, 250], [31, 400]], 'bolt': [[32, 400], [32, -80], [5, 250]], 'crux': [[5, -300], [1, 250], [31, -300]]}, 'as_of': 31}, {'control': 650, 'subledger': 550, 'difference': 100, 'credit_balances': ['crux'], 'open_customers': 3}], ['control 4', {'control': [[31, 250], [1, -80], [5, 100], [31, 250], [5, 100]], 'sub': {'crux': [[32, -300], [1, 250]]}, 'as_of': 31}, {'control': 620, 'subledger': 250, 'difference': 370, 'credit_balances': [], 'open_customers': 1}], ['control 5', {'control': [[31, 250], [5, -80], [1, 400], [32, 400], [1, 400]], 'sub': {'crux': [[5, 250], [1, 400]]}, 'as_of': 31}, {'control': 970, 'subledger': 650, 'difference': 320, 'credit_balances': [], 'open_customers': 1}]], [['regression: credit balance threshold', {'control': [[5, 100], [5, 250], [19, -80], [21, 250], [21, 250]], 'sub': {'crux': [[20, -80], [20, -80]], 'acme': [[21, 100]]}, 'as_of': 20}, {'control': 270, 'subledger': -160, 'difference': 430, 'credit_balances': ['crux'], 'open_customers': 1}], ['regression: credit balance threshold, partial-repair probe', {'control': [[11, -80], [10, 400], [11, -80], [1, 100], [9, 100]], 'sub': {'crux': [[5, -300], [1, -300]], 'dyna': [[5, -80]], 'bolt': [[1, -300], [10, -80], [1, 100]], 'acme': [[10, 250], [11, -80]]}, 'as_of': 10}, {'control': 600, 'subledger': -710, 'difference': 1310, 'credit_balances': ['bolt', 'crux', 'dyna'], 'open_customers': 4}], ['control 1', {'control': [[10, -80], [9, 400], [1, 250]], 'sub': {'crux': [[5, 250], [1, 400], [5, 250]], 'acme': [[10, -80]]}, 'as_of': 10}, {'control': 570, 'subledger': 820, 'difference': -250, 'credit_balances': ['acme'], 'open_customers': 2}], ['control 2', {'control': [[1, -80], [5, 100], [20, 400], [19, 250], [1, 250]], 'sub': {'crux': [[20, 250], [20, -80], [20, 250]]}, 'as_of': 20}, {'control': 920, 'subledger': 420, 'difference': 500, 'credit_balances': [], 'open_customers': 1}], ['control 3', {'control': [[5, 400], [1, 250], [9, 400], [9, 400]], 'sub': {'acme': [[1, -300], [11, -80]], 'bolt': [[1, 250], [10, 250], [5, -300]], 'dyna': [[1, -300], [10, -300], [1, 100]]}, 'as_of': 10}, {'control': 1450, 'subledger': -600, 'difference': 2050, 'credit_balances': ['acme', 'dyna'], 'open_customers': 3}], ['control 4', {'control': [[9, -80], [11, 400]], 'sub': {'bolt': [[5, 100], [5, 250]], 'acme': [[11, 100], [11, -80], [10, 250]]}, 'as_of': 10}, {'control': -80, 'subledger': 600, 'difference': -680, 'credit_balances': [], 'open_customers': 2}], ['control 5', {'control': [[1, 100], [1, 250], [5, 250], [1, 100], [1, 400], [5, -80]], 'sub': {'bolt': [[10, -80], [10, 400]], 'crux': [[1, 250], [10, 250]]}, 'as_of': 10}, {'control': 1020, 'subledger': 820, 'difference': 200, 'credit_balances': [], 'open_customers': 2}]]]\nfor label, args, expected in fixtures[N-1]:\n    try:\n        actual = solve(args)\n    except Exception as exc:\n        actual = 'raised ' + type(exc).__name__\n    check(label, actual, 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 with stipulated toy bookkeeping rules stated in the contract; amounts are integer cents; it makes no claim of conformance to any accounting standard or product. 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-double-entry-ledger-accounting-subledger-control-tieout-credit-balance-threshold","generated_at":"2026-09-29T14:46:25.164770+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"Ledger software must keep debits equal to credits and apply normal-balance, period and cutoff rules exactly; small sign or boundary slips silently misstate financial statements.","root_cause":"The credit list includes zero balances.","sha256":"5a004723191e977afe1b8fe8eedf5d86ea90b4b5c8ee02844d3f771503353797","title":"Receivables subledger tie-out: credit balance threshold · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verified":true,"visibility":"public","verification":{"attempt":{"elapsed_ms":41.275,"exit_code":1,"observations":[{"actual":{"control":20,"credit_balances":[],"difference":-1320,"open_customers":3,"subledger":1340},"check":"regression: credit balance threshold","expected":{"control":20,"credit_balances":[],"difference":-1320,"open_customers":3,"subledger":1340},"passed":true},{"actual":{"control":320,"credit_balances":["crux","acme"],"difference":920,"open_customers":2,"subledger":-600},"check":"regression: credit balance threshold, partial-repair probe","expected":{"control":320,"credit_balances":["acme","crux"],"difference":920,"open_customers":2,"subledger":-600},"passed":false},{"actual":{"control":820,"credit_balances":[],"difference":570,"open_customers":1,"subledger":250},"check":"control 1","expected":{"control":820,"credit_balances":[],"difference":570,"open_customers":1,"subledger":250},"passed":true},{"actual":{"control":350,"credit_balances":["acme","bolt"],"difference":160,"open_customers":3,"subledger":190},"check":"control 2","expected":{"control":350,"credit_balances":["acme","bolt"],"difference":160,"open_customers":3,"subledger":190},"passed":true},{"actual":{"control":1200,"credit_balances":[],"difference":400,"open_customers":1,"subledger":800},"check":"control 3","expected":{"control":1200,"credit_balances":[],"difference":400,"open_customers":1,"subledger":800},"passed":true},{"actual":{"control":600,"credit_balances":["bolt"],"difference":260,"open_customers":3,"subledger":340},"check":"control 4","expected":{"control":600,"credit_balances":["bolt"],"difference":260,"open_customers":3,"subledger":340},"passed":true},{"actual":{"control":1150,"credit_balances":[],"difference":650,"open_customers":1,"subledger":500},"check":"control 5","expected":{"control":1150,"credit_balances":[],"difference":650,"open_customers":1,"subledger":500},"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"regression: credit balance threshold\", \"actual\": {\"control\": 20, \"subledger\": 1340, \"difference\": -1320, \"credit_balances\": [], \"open_customers\": 3}, \"expected\": {\"control\": 20, \"subledger\": 1340, \"difference\": -1320, \"credit_balances\": [], \"open_customers\": 3}, \"passed\": true}, {\"check\": \"regression: credit balance threshold, partial-repair probe\", \"actual\": {\"control\": 320, \"subledger\": -600, \"difference\": 920, \"credit_balances\": [\"crux\", \"acme\"], \"open_customers\": 2}, \"expected\": {\"control\": 320, \"subledger\": -600, \"difference\": 920, \"credit_balances\": [\"acme\", \"crux\"], \"open_customers\": 2}, \"passed\": false}, {\"check\": \"control 1\", \"actual\": {\"control\": 820, \"subledger\": 250, \"difference\": 570, \"credit_balances\": [], \"open_customers\": 1}, \"expected\": {\"control\": 820, \"subledger\": 250, \"difference\": 570, \"credit_balances\": [], \"open_customers\": 1}, \"passed\": true}, {\"check\": \"control 2\", \"actual\": {\"control\": 350, \"subledger\": 190, \"difference\": 160, \"credit_balances\": [\"acme\", \"bolt\"], \"open_customers\": 3}, \"expected\": {\"control\": 350, \"subledger\": 190, \"difference\": 160, \"credit_balances\": [\"acme\", \"bolt\"], \"open_customers\": 3}, \"passed\": true}, {\"check\": \"control 3\", \"actual\": {\"control\": 1200, \"subledger\": 800, \"difference\": 400, \"credit_balances\": [], \"open_customers\": 1}, \"expected\": {\"control\": 1200, \"subledger\": 800, \"difference\": 400, \"credit_balances\": [], \"open_customers\": 1}, \"passed\": true}, {\"check\": \"control 4\", \"actual\": {\"control\": 600, \"subledger\": 340, \"difference\": 260, \"credit_balances\": [\"bolt\"], \"open_customers\": 3}, \"expected\": {\"control\": 600, \"subledger\": 340, \"difference\": 260, \"credit_balances\": [\"bolt\"], \"open_customers\": 3}, \"passed\": true}, {\"check\": \"control 5\", \"actual\": {\"control\": 1150, \"subledger\": 500, \"difference\": 650, \"credit_balances\": [], \"open_customers\": 1}, \"expected\": {\"control\": 1150, \"subledger\": 500, \"difference\": 650, \"credit_balances\": [], \"open_customers\": 1}, \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":43.569,"exit_code":1,"observations":[{"actual":{"control":20,"credit_balances":["acme"],"difference":-1320,"open_customers":3,"subledger":1340},"check":"regression: credit balance threshold","expected":{"control":20,"credit_balances":[],"difference":-1320,"open_customers":3,"subledger":1340},"passed":false},{"actual":{"control":320,"credit_balances":["acme","bolt","crux","dyna"],"difference":920,"open_customers":2,"subledger":-600},"check":"regression: credit balance threshold, partial-repair probe","expected":{"control":320,"credit_balances":["acme","crux"],"difference":920,"open_customers":2,"subledger":-600},"passed":false},{"actual":{"control":820,"credit_balances":[],"difference":570,"open_customers":1,"subledger":250},"check":"control 1","expected":{"control":820,"credit_balances":[],"difference":570,"open_customers":1,"subledger":250},"passed":true},{"actual":{"control":350,"credit_balances":["acme","bolt"],"difference":160,"open_customers":3,"subledger":190},"check":"control 2","expected":{"control":350,"credit_balances":["acme","bolt"],"difference":160,"open_customers":3,"subledger":190},"passed":true},{"actual":{"control":1200,"credit_balances":[],"difference":400,"open_customers":1,"subledger":800},"check":"control 3","expected":{"control":1200,"credit_balances":[],"difference":400,"open_customers":1,"subledger":800},"passed":true},{"actual":{"control":600,"credit_balances":["bolt"],"difference":260,"open_customers":3,"subledger":340},"check":"control 4","expected":{"control":600,"credit_balances":["bolt"],"difference":260,"open_customers":3,"subledger":340},"passed":true},{"actual":{"control":1150,"credit_balances":[],"difference":650,"open_customers":1,"subledger":500},"check":"control 5","expected":{"control":1150,"credit_balances":[],"difference":650,"open_customers":1,"subledger":500},"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"regression: credit balance threshold\", \"actual\": {\"control\": 20, \"subledger\": 1340, \"difference\": -1320, \"credit_balances\": [\"acme\"], \"open_customers\": 3}, \"expected\": {\"control\": 20, \"subledger\": 1340, \"difference\": -1320, \"credit_balances\": [], \"open_customers\": 3}, \"passed\": false}, {\"check\": \"regression: credit balance threshold, partial-repair probe\", \"actual\": {\"control\": 320, \"subledger\": -600, \"difference\": 920, \"credit_balances\": [\"acme\", \"bolt\", \"crux\", \"dyna\"], \"open_customers\": 2}, \"expected\": {\"control\": 320, \"subledger\": -600, \"difference\": 920, \"credit_balances\": [\"acme\", \"crux\"], \"open_customers\": 2}, \"passed\": false}, {\"check\": \"control 1\", \"actual\": {\"control\": 820, \"subledger\": 250, \"difference\": 570, \"credit_balances\": [], \"open_customers\": 1}, \"expected\": {\"control\": 820, \"subledger\": 250, \"difference\": 570, \"credit_balances\": [], \"open_customers\": 1}, \"passed\": true}, {\"check\": \"control 2\", \"actual\": {\"control\": 350, \"subledger\": 190, \"difference\": 160, \"credit_balances\": [\"acme\", \"bolt\"], \"open_customers\": 3}, \"expected\": {\"control\": 350, \"subledger\": 190, \"difference\": 160, \"credit_balances\": [\"acme\", \"bolt\"], \"open_customers\": 3}, \"passed\": true}, {\"check\": \"control 3\", \"actual\": {\"control\": 1200, \"subledger\": 800, \"difference\": 400, \"credit_balances\": [], \"open_customers\": 1}, \"expected\": {\"control\": 1200, \"subledger\": 800, \"difference\": 400, \"credit_balances\": [], \"open_customers\": 1}, \"passed\": true}, {\"check\": \"control 4\", \"actual\": {\"control\": 600, \"subledger\": 340, \"difference\": 260, \"credit_balances\": [\"bolt\"], \"open_customers\": 3}, \"expected\": {\"control\": 600, \"subledger\": 340, \"difference\": 260, \"credit_balances\": [\"bolt\"], \"open_customers\": 3}, \"passed\": true}, {\"check\": \"control 5\", \"actual\": {\"control\": 1150, \"subledger\": 500, \"difference\": 650, \"credit_balances\": [], \"open_customers\": 1}, \"expected\": {\"control\": 1150, \"subledger\": 500, \"difference\": 650, \"credit_balances\": [], \"open_customers\": 1}, \"passed\": true}], \"passed\": false}\n"}},"member_only":{"stages":["fixed"],"fields":["implementations.fixed","verification.fixed","harness","repair"],"note":"The verified repair, its recorded checks, the repair description, and the scoring harness are available to members."}}