{"abstract":"Interest stays flat every month even as principal is repaid.","category":"Loan amortization schedules","checks":7,"contract":"x = {'principal', 'rate_bp', 'payment', 'max_months'}. For months 1..max_months while the balance is positive: interest = round_half_up(balance*bp/120000); if payment <= interest return {'error': 'negative_amortization', 'month': k}; principal paid = min(payment - interest, balance); append [k, interest, principal, balance after]. Return {'rows', 'balloon': remaining principal}.","contract_signature":"x","evaluation_group":"w2-loan-amortization-schedules-schedule-from-fixed-payment","failed_approach":"Charging on the balance after the payment treats interest as paid in advance.","family":"w2-loan-amortization-schedules-schedule-from-fixed-payment-interest-base","id":"FA-58391","implementations":{"attempt":{"sha256":"0a145a848e06c46596fcd8ca86c93fa9b151035d760d317fd643b791f4b65c52","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\nimport math\nfrom fractions import Fraction\nN = 1\nobservations = []\ndef solve(x):\n    def rnd(n, d):\n        q, r = divmod(n, d)\n        return q + (1 if 2 * r >= d else 0)\n    bal = x['principal']\n    rows = []\n    for k in range(1, x['max_months'] + 1):\n        if bal == 0:\n            break\n        interest = rnd(max(bal - x['payment'], 0) * x['rate_bp'], 120000)\n        pay = x['payment']\n        if pay <= interest:\n            return {'error': 'negative_amortization', 'month': k}\n        princ = min(pay - interest, bal)\n        bal -= princ\n        rows.append([k, interest, princ, bal])\n    return {'rows': rows, 'balloon': bal}\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[['regression: interest base', {'principal': 250000, 'rate_bp': 1999, 'payment': 5000, 'max_months': 24}, {'rows': [[1, 4165, 835, 249165], [2, 4151, 849, 248316], [3, 4137, 863, 247453], [4, 4122, 878, 246575], [5, 4108, 892, 245683], [6, 4093, 907, 244776], [7, 4078, 922, 243854], [8, 4062, 938, 242916], [9, 4047, 953, 241963], [10, 4031, 969, 240994], [11, 4015, 985, 240009], [12, 3998, 1002, 239007], [13, 3981, 1019, 237988], [14, 3964, 1036, 236952], [15, 3947, 1053, 235899], [16, 3930, 1070, 234829], [17, 3912, 1088, 233741], [18, 3894, 1106, 232635], [19, 3875, 1125, 231510], [20, 3857, 1143, 230367], [21, 3838, 1162, 229205], [22, 3818, 1182, 228023], [23, 3798, 1202, 226821], [24, 3778, 1222, 225599]], 'balloon': 225599}], ['control 1', {'principal': 250000, 'rate_bp': 0, 'payment': 500, 'max_months': 1}, {'rows': [[1, 0, 500, 249500]], 'balloon': 249500}], ['control 2', {'principal': 250000, 'rate_bp': 1999, 'payment': 500, 'max_months': 24}, {'error': 'negative_amortization', 'month': 1}], ['control 3', {'principal': 100000, 'rate_bp': 1999, 'payment': 1000, 'max_months': 0}, {'rows': [], 'balloon': 100000}], ['control 4', {'principal': 250000, 'rate_bp': 1200, 'payment': 500, 'max_months': 12}, {'error': 'negative_amortization', 'month': 1}], ['control 5', {'principal': 250000, 'rate_bp': 1999, 'payment': 1200, 'max_months': 6}, {'error': 'negative_amortization', 'month': 1}], ['control 6', {'principal': 50000, 'rate_bp': 1200, 'payment': 500, 'max_months': 1}, {'error': 'negative_amortization', 'month': 1}]], [['regression: interest base', {'principal': 12345, 'rate_bp': 600, 'payment': 500, 'max_months': 24}, {'rows': [[1, 62, 438, 11907], [2, 60, 440, 11467], [3, 57, 443, 11024], [4, 55, 445, 10579], [5, 53, 447, 10132], [6, 51, 449, 9683], [7, 48, 452, 9231], [8, 46, 454, 8777], [9, 44, 456, 8321], [10, 42, 458, 7863], [11, 39, 461, 7402], [12, 37, 463, 6939], [13, 35, 465, 6474], [14, 32, 468, 6006], [15, 30, 470, 5536], [16, 28, 472, 5064], [17, 25, 475, 4589], [18, 23, 477, 4112], [19, 21, 479, 3633], [20, 18, 482, 3151], [21, 16, 484, 2667], [22, 13, 487, 2180], [23, 11, 489, 1691], [24, 8, 492, 1199]], 'balloon': 1199}], ['control 1', {'principal': 100000, 'rate_bp': 600, 'payment': 20007, 'max_months': 1}, {'rows': [[1, 500, 19507, 80493]], 'balloon': 80493}], ['control 2', {'principal': 100000, 'rate_bp': 0, 'payment': 20007, 'max_months': 3}, {'rows': [[1, 0, 20007, 79993], [2, 0, 20007, 59986], [3, 0, 20007, 39979]], 'balloon': 39979}], ['control 3', {'principal': 1000, 'rate_bp': 0, 'payment': 1000, 'max_months': 0}, {'rows': [], 'balloon': 1000}], ['control 4', {'principal': 50000, 'rate_bp': 0, 'payment': 1000, 'max_months': 3}, {'rows': [[1, 0, 1000, 49000], [2, 0, 1000, 48000], [3, 0, 1000, 47000]], 'balloon': 47000}], ['control 5', {'principal': 250000, 'rate_bp': 2400, 'payment': 500, 'max_months': 12}, {'error': 'negative_amortization', 'month': 1}], ['control 6', {'principal': 50000, 'rate_bp': 0, 'payment': 16666, 'max_months': 24}, {'rows': [[1, 0, 16666, 33334], [2, 0, 16666, 16668], [3, 0, 16666, 2], [4, 0, 2, 0]], 'balloon': 0}]], [['regression: interest base', {'principal': 50000, 'rate_bp': 2400, 'payment': 5000, 'max_months': 3}, {'rows': [[1, 1000, 4000, 46000], [2, 920, 4080, 41920], [3, 838, 4162, 37758]], 'balloon': 37758}], ['control 1', {'principal': 12345, 'rate_bp': 0, 'payment': 4115, 'max_months': 24}, {'rows': [[1, 0, 4115, 8230], [2, 0, 4115, 4115], [3, 0, 4115, 0]], 'balloon': 0}], ['control 2', {'principal': 12345, 'rate_bp': 0, 'payment': 4115, 'max_months': 1}, {'rows': [[1, 0, 4115, 8230]], 'balloon': 8230}], ['control 3', {'principal': 250000, 'rate_bp': 600, 'payment': 20833, 'max_months': 1}, {'rows': [[1, 1250, 19583, 230417]], 'balloon': 230417}], ['control 4', {'principal': 1000, 'rate_bp': 2400, 'payment': 1050, 'max_months': 0}, {'rows': [], 'balloon': 1000}], ['control 5', {'principal': 250000, 'rate_bp': 1999, 'payment': 83333, 'max_months': 0}, {'rows': [], 'balloon': 250000}], ['control 6', {'principal': 250000, 'rate_bp': 600, 'payment': 1000, 'max_months': 3}, {'error': 'negative_amortization', 'month': 1}]], [['regression: interest base', {'principal': 12345, 'rate_bp': 1200, 'payment': 5000, 'max_months': 3}, {'rows': [[1, 123, 4877, 7468], [2, 75, 4925, 2543], [3, 25, 2543, 0]], 'balloon': 0}], ['control 1', {'principal': 12345, 'rate_bp': 0, 'payment': 5000, 'max_months': 6}, {'rows': [[1, 0, 5000, 7345], [2, 0, 5000, 2345], [3, 0, 2345, 0]], 'balloon': 0}], ['control 2', {'principal': 100000, 'rate_bp': 0, 'payment': 8333, 'max_months': 24}, {'rows': [[1, 0, 8333, 91667], [2, 0, 8333, 83334], [3, 0, 8333, 75001], [4, 0, 8333, 66668], [5, 0, 8333, 58335], [6, 0, 8333, 50002], [7, 0, 8333, 41669], [8, 0, 8333, 33336], [9, 0, 8333, 25003], [10, 0, 8333, 16670], [11, 0, 8333, 8337], [12, 0, 8333, 4], [13, 0, 4, 0]], 'balloon': 0}], ['control 3', {'principal': 1000, 'rate_bp': 1999, 'payment': 5000, 'max_months': 24}, {'rows': [[1, 17, 1000, 0]], 'balloon': 0}], ['control 4', {'principal': 250000, 'rate_bp': 600, 'payment': 500, 'max_months': 0}, {'rows': [], 'balloon': 250000}], ['control 5', {'principal': 50000, 'rate_bp': 1200, 'payment': 5000, 'max_months': 1}, {'rows': [[1, 500, 4500, 45500]], 'balloon': 45500}], ['control 6', {'principal': 250000, 'rate_bp': 1200, 'payment': 500, 'max_months': 6}, {'error': 'negative_amortization', 'month': 1}]], [['regression: interest base', {'principal': 1000, 'rate_bp': 2400, 'payment': 500, 'max_months': 3}, {'rows': [[1, 20, 480, 520], [2, 10, 490, 30], [3, 1, 30, 0]], 'balloon': 0}], ['control 1', {'principal': 50000, 'rate_bp': 0, 'payment': 10007, 'max_months': 24}, {'rows': [[1, 0, 10007, 39993], [2, 0, 10007, 29986], [3, 0, 10007, 19979], [4, 0, 10007, 9972], [5, 0, 9972, 0]], 'balloon': 0}], ['control 2', {'principal': 12345, 'rate_bp': 2400, 'payment': 2476, 'max_months': 0}, {'rows': [], 'balloon': 12345}], ['control 3', {'principal': 250000, 'rate_bp': 2400, 'payment': 20833, 'max_months': 0}, {'rows': [], 'balloon': 250000}], ['control 4', {'principal': 50000, 'rate_bp': 600, 'payment': 1000, 'max_months': 0}, {'rows': [], 'balloon': 50000}], ['control 5', {'principal': 100000, 'rate_bp': 1200, 'payment': 1200, 'max_months': 1}, {'rows': [[1, 1000, 200, 99800]], 'balloon': 99800}], ['control 6', {'principal': 50000, 'rate_bp': 2400, 'payment': 4166, 'max_months': 0}, {'rows': [], 'balloon': 50000}]]]\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":"07655838710d8d343ab863ca2c07eee3363f9b649ad3658d83f3b8990a519fad","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\nimport math\nfrom fractions import Fraction\nN = 1\nobservations = []\ndef solve(x):\n    def rnd(n, d):\n        q, r = divmod(n, d)\n        return q + (1 if 2 * r >= d else 0)\n    bal = x['principal']\n    rows = []\n    for k in range(1, x['max_months'] + 1):\n        if bal == 0:\n            break\n        interest = rnd(x['principal'] * x['rate_bp'], 120000)\n        pay = x['payment']\n        if pay <= interest:\n            return {'error': 'negative_amortization', 'month': k}\n        princ = min(pay - interest, bal)\n        bal -= princ\n        rows.append([k, interest, princ, bal])\n    return {'rows': rows, 'balloon': bal}\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[['regression: interest base', {'principal': 250000, 'rate_bp': 1999, 'payment': 5000, 'max_months': 24}, {'rows': [[1, 4165, 835, 249165], [2, 4151, 849, 248316], [3, 4137, 863, 247453], [4, 4122, 878, 246575], [5, 4108, 892, 245683], [6, 4093, 907, 244776], [7, 4078, 922, 243854], [8, 4062, 938, 242916], [9, 4047, 953, 241963], [10, 4031, 969, 240994], [11, 4015, 985, 240009], [12, 3998, 1002, 239007], [13, 3981, 1019, 237988], [14, 3964, 1036, 236952], [15, 3947, 1053, 235899], [16, 3930, 1070, 234829], [17, 3912, 1088, 233741], [18, 3894, 1106, 232635], [19, 3875, 1125, 231510], [20, 3857, 1143, 230367], [21, 3838, 1162, 229205], [22, 3818, 1182, 228023], [23, 3798, 1202, 226821], [24, 3778, 1222, 225599]], 'balloon': 225599}], ['control 1', {'principal': 250000, 'rate_bp': 0, 'payment': 500, 'max_months': 1}, {'rows': [[1, 0, 500, 249500]], 'balloon': 249500}], ['control 2', {'principal': 250000, 'rate_bp': 1999, 'payment': 500, 'max_months': 24}, {'error': 'negative_amortization', 'month': 1}], ['control 3', {'principal': 100000, 'rate_bp': 1999, 'payment': 1000, 'max_months': 0}, {'rows': [], 'balloon': 100000}], ['control 4', {'principal': 250000, 'rate_bp': 1200, 'payment': 500, 'max_months': 12}, {'error': 'negative_amortization', 'month': 1}], ['control 5', {'principal': 250000, 'rate_bp': 1999, 'payment': 1200, 'max_months': 6}, {'error': 'negative_amortization', 'month': 1}], ['control 6', {'principal': 50000, 'rate_bp': 1200, 'payment': 500, 'max_months': 1}, {'error': 'negative_amortization', 'month': 1}]], [['regression: interest base', {'principal': 12345, 'rate_bp': 600, 'payment': 500, 'max_months': 24}, {'rows': [[1, 62, 438, 11907], [2, 60, 440, 11467], [3, 57, 443, 11024], [4, 55, 445, 10579], [5, 53, 447, 10132], [6, 51, 449, 9683], [7, 48, 452, 9231], [8, 46, 454, 8777], [9, 44, 456, 8321], [10, 42, 458, 7863], [11, 39, 461, 7402], [12, 37, 463, 6939], [13, 35, 465, 6474], [14, 32, 468, 6006], [15, 30, 470, 5536], [16, 28, 472, 5064], [17, 25, 475, 4589], [18, 23, 477, 4112], [19, 21, 479, 3633], [20, 18, 482, 3151], [21, 16, 484, 2667], [22, 13, 487, 2180], [23, 11, 489, 1691], [24, 8, 492, 1199]], 'balloon': 1199}], ['control 1', {'principal': 100000, 'rate_bp': 600, 'payment': 20007, 'max_months': 1}, {'rows': [[1, 500, 19507, 80493]], 'balloon': 80493}], ['control 2', {'principal': 100000, 'rate_bp': 0, 'payment': 20007, 'max_months': 3}, {'rows': [[1, 0, 20007, 79993], [2, 0, 20007, 59986], [3, 0, 20007, 39979]], 'balloon': 39979}], ['control 3', {'principal': 1000, 'rate_bp': 0, 'payment': 1000, 'max_months': 0}, {'rows': [], 'balloon': 1000}], ['control 4', {'principal': 50000, 'rate_bp': 0, 'payment': 1000, 'max_months': 3}, {'rows': [[1, 0, 1000, 49000], [2, 0, 1000, 48000], [3, 0, 1000, 47000]], 'balloon': 47000}], ['control 5', {'principal': 250000, 'rate_bp': 2400, 'payment': 500, 'max_months': 12}, {'error': 'negative_amortization', 'month': 1}], ['control 6', {'principal': 50000, 'rate_bp': 0, 'payment': 16666, 'max_months': 24}, {'rows': [[1, 0, 16666, 33334], [2, 0, 16666, 16668], [3, 0, 16666, 2], [4, 0, 2, 0]], 'balloon': 0}]], [['regression: interest base', {'principal': 50000, 'rate_bp': 2400, 'payment': 5000, 'max_months': 3}, {'rows': [[1, 1000, 4000, 46000], [2, 920, 4080, 41920], [3, 838, 4162, 37758]], 'balloon': 37758}], ['control 1', {'principal': 12345, 'rate_bp': 0, 'payment': 4115, 'max_months': 24}, {'rows': [[1, 0, 4115, 8230], [2, 0, 4115, 4115], [3, 0, 4115, 0]], 'balloon': 0}], ['control 2', {'principal': 12345, 'rate_bp': 0, 'payment': 4115, 'max_months': 1}, {'rows': [[1, 0, 4115, 8230]], 'balloon': 8230}], ['control 3', {'principal': 250000, 'rate_bp': 600, 'payment': 20833, 'max_months': 1}, {'rows': [[1, 1250, 19583, 230417]], 'balloon': 230417}], ['control 4', {'principal': 1000, 'rate_bp': 2400, 'payment': 1050, 'max_months': 0}, {'rows': [], 'balloon': 1000}], ['control 5', {'principal': 250000, 'rate_bp': 1999, 'payment': 83333, 'max_months': 0}, {'rows': [], 'balloon': 250000}], ['control 6', {'principal': 250000, 'rate_bp': 600, 'payment': 1000, 'max_months': 3}, {'error': 'negative_amortization', 'month': 1}]], [['regression: interest base', {'principal': 12345, 'rate_bp': 1200, 'payment': 5000, 'max_months': 3}, {'rows': [[1, 123, 4877, 7468], [2, 75, 4925, 2543], [3, 25, 2543, 0]], 'balloon': 0}], ['control 1', {'principal': 12345, 'rate_bp': 0, 'payment': 5000, 'max_months': 6}, {'rows': [[1, 0, 5000, 7345], [2, 0, 5000, 2345], [3, 0, 2345, 0]], 'balloon': 0}], ['control 2', {'principal': 100000, 'rate_bp': 0, 'payment': 8333, 'max_months': 24}, {'rows': [[1, 0, 8333, 91667], [2, 0, 8333, 83334], [3, 0, 8333, 75001], [4, 0, 8333, 66668], [5, 0, 8333, 58335], [6, 0, 8333, 50002], [7, 0, 8333, 41669], [8, 0, 8333, 33336], [9, 0, 8333, 25003], [10, 0, 8333, 16670], [11, 0, 8333, 8337], [12, 0, 8333, 4], [13, 0, 4, 0]], 'balloon': 0}], ['control 3', {'principal': 1000, 'rate_bp': 1999, 'payment': 5000, 'max_months': 24}, {'rows': [[1, 17, 1000, 0]], 'balloon': 0}], ['control 4', {'principal': 250000, 'rate_bp': 600, 'payment': 500, 'max_months': 0}, {'rows': [], 'balloon': 250000}], ['control 5', {'principal': 50000, 'rate_bp': 1200, 'payment': 5000, 'max_months': 1}, {'rows': [[1, 500, 4500, 45500]], 'balloon': 45500}], ['control 6', {'principal': 250000, 'rate_bp': 1200, 'payment': 500, 'max_months': 6}, {'error': 'negative_amortization', 'month': 1}]], [['regression: interest base', {'principal': 1000, 'rate_bp': 2400, 'payment': 500, 'max_months': 3}, {'rows': [[1, 20, 480, 520], [2, 10, 490, 30], [3, 1, 30, 0]], 'balloon': 0}], ['control 1', {'principal': 50000, 'rate_bp': 0, 'payment': 10007, 'max_months': 24}, {'rows': [[1, 0, 10007, 39993], [2, 0, 10007, 29986], [3, 0, 10007, 19979], [4, 0, 10007, 9972], [5, 0, 9972, 0]], 'balloon': 0}], ['control 2', {'principal': 12345, 'rate_bp': 2400, 'payment': 2476, 'max_months': 0}, {'rows': [], 'balloon': 12345}], ['control 3', {'principal': 250000, 'rate_bp': 2400, 'payment': 20833, 'max_months': 0}, {'rows': [], 'balloon': 250000}], ['control 4', {'principal': 50000, 'rate_bp': 600, 'payment': 1000, 'max_months': 0}, {'rows': [], 'balloon': 50000}], ['control 5', {'principal': 100000, 'rate_bp': 1200, 'payment': 1200, 'max_months': 1}, {'rows': [[1, 1000, 200, 99800]], 'balloon': 99800}], ['control 6', {'principal': 50000, 'rate_bp': 2400, 'payment': 4166, 'max_months': 0}, {'rows': [], 'balloon': 50000}]]]\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 lending rules stated in the contract; money is integer cents and rates are basis points; it makes no claim of conformance to any regulation, servicing 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-loan-amortization-schedules-schedule-from-fixed-payment-interest-base","generated_at":"2026-09-29T14:46:26.189592+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"Amortization engines drive borrower statements, payoff quotes and investor remittances; a misplaced rounding step, boundary or ordering rule compounds across hundreds of periods.","root_cause":"Interest is charged on the original principal.","sha256":"0c5a9db8ab237682e21f6a9ae646b9d2c22852679c61a11fb512790e8a04d52d","title":"Schedule rows from a fixed payment: interest base · 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":43.022,"exit_code":1,"observations":[{"actual":{"balloon":223162,"rows":[[1,4081,919,249081],[2,4066,934,248147],[3,4050,950,247197],[4,4035,965,246232],[5,4019,981,245251],[6,4002,998,244253],[7,3986,1014,243239],[8,3969,1031,242208],[9,3951,1049,241159],[10,3934,1066,240093],[11,3916,1084,239009],[12,3898,1102,237907],[13,3880,1120,236787],[14,3861,1139,235648],[15,3842,1158,234490],[16,3823,1177,233313],[17,3803,1197,232116],[18,3783,1217,230899],[19,3763,1237,229662],[20,3742,1258,228404],[21,3722,1278,227126],[22,3700,1300,225826],[23,3679,1321,224505],[24,3657,1343,223162]]},"check":"regression: interest base","expected":{"balloon":225599,"rows":[[1,4165,835,249165],[2,4151,849,248316],[3,4137,863,247453],[4,4122,878,246575],[5,4108,892,245683],[6,4093,907,244776],[7,4078,922,243854],[8,4062,938,242916],[9,4047,953,241963],[10,4031,969,240994],[11,4015,985,240009],[12,3998,1002,239007],[13,3981,1019,237988],[14,3964,1036,236952],[15,3947,1053,235899],[16,3930,1070,234829],[17,3912,1088,233741],[18,3894,1106,232635],[19,3875,1125,231510],[20,3857,1143,230367],[21,3838,1162,229205],[22,3818,1182,228023],[23,3798,1202,226821],[24,3778,1222,225599]]},"passed":false},{"actual":{"balloon":249500,"rows":[[1,0,500,249500]]},"check":"control 1","expected":{"balloon":249500,"rows":[[1,0,500,249500]]},"passed":true},{"actual":{"error":"negative_amortization","month":1},"check":"control 2","expected":{"error":"negative_amortization","month":1},"passed":true},{"actual":{"balloon":100000,"rows":[]},"check":"control 3","expected":{"balloon":100000,"rows":[]},"passed":true},{"actual":{"error":"negative_amortization","month":1},"check":"control 4","expected":{"error":"negative_amortization","month":1},"passed":true},{"actual":{"error":"negative_amortization","month":1},"check":"control 5","expected":{"error":"negative_amortization","month":1},"passed":true},{"actual":{"balloon":49995,"rows":[[1,495,5,49995]]},"check":"control 6","expected":{"error":"negative_amortization","month":1},"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"regression: interest base\", \"actual\": {\"rows\": [[1, 4081, 919, 249081], [2, 4066, 934, 248147], [3, 4050, 950, 247197], [4, 4035, 965, 246232], [5, 4019, 981, 245251], [6, 4002, 998, 244253], [7, 3986, 1014, 243239], [8, 3969, 1031, 242208], [9, 3951, 1049, 241159], [10, 3934, 1066, 240093], [11, 3916, 1084, 239009], [12, 3898, 1102, 237907], [13, 3880, 1120, 236787], [14, 3861, 1139, 235648], [15, 3842, 1158, 234490], [16, 3823, 1177, 233313], [17, 3803, 1197, 232116], [18, 3783, 1217, 230899], [19, 3763, 1237, 229662], [20, 3742, 1258, 228404], [21, 3722, 1278, 227126], [22, 3700, 1300, 225826], [23, 3679, 1321, 224505], [24, 3657, 1343, 223162]], \"balloon\": 223162}, \"expected\": {\"rows\": [[1, 4165, 835, 249165], [2, 4151, 849, 248316], [3, 4137, 863, 247453], [4, 4122, 878, 246575], [5, 4108, 892, 245683], [6, 4093, 907, 244776], [7, 4078, 922, 243854], [8, 4062, 938, 242916], [9, 4047, 953, 241963], [10, 4031, 969, 240994], [11, 4015, 985, 240009], [12, 3998, 1002, 239007], [13, 3981, 1019, 237988], [14, 3964, 1036, 236952], [15, 3947, 1053, 235899], [16, 3930, 1070, 234829], [17, 3912, 1088, 233741], [18, 3894, 1106, 232635], [19, 3875, 1125, 231510], [20, 3857, 1143, 230367], [21, 3838, 1162, 229205], [22, 3818, 1182, 228023], [23, 3798, 1202, 226821], [24, 3778, 1222, 225599]], \"balloon\": 225599}, \"passed\": false}, {\"check\": \"control 1\", \"actual\": {\"rows\": [[1, 0, 500, 249500]], \"balloon\": 249500}, \"expected\": {\"rows\": [[1, 0, 500, 249500]], \"balloon\": 249500}, \"passed\": true}, {\"check\": \"control 2\", \"actual\": {\"error\": \"negative_amortization\", \"month\": 1}, \"expected\": {\"error\": \"negative_amortization\", \"month\": 1}, \"passed\": true}, {\"check\": \"control 3\", \"actual\": {\"rows\": [], \"balloon\": 100000}, \"expected\": {\"rows\": [], \"balloon\": 100000}, \"passed\": true}, {\"check\": \"control 4\", \"actual\": {\"error\": \"negative_amortization\", \"month\": 1}, \"expected\": {\"error\": \"negative_amortization\", \"month\": 1}, \"passed\": true}, {\"check\": \"control 5\", \"actual\": {\"error\": \"negative_amortization\", \"month\": 1}, \"expected\": {\"error\": \"negative_amortization\", \"month\": 1}, \"passed\": true}, {\"check\": \"control 6\", \"actual\": {\"rows\": [[1, 495, 5, 49995]], \"balloon\": 49995}, \"expected\": {\"error\": \"negative_amortization\", \"month\": 1}, \"passed\": false}], \"passed\": false}\n"},"broken":{"elapsed_ms":46.918,"exit_code":1,"observations":[{"actual":{"balloon":229960,"rows":[[1,4165,835,249165],[2,4165,835,248330],[3,4165,835,247495],[4,4165,835,246660],[5,4165,835,245825],[6,4165,835,244990],[7,4165,835,244155],[8,4165,835,243320],[9,4165,835,242485],[10,4165,835,241650],[11,4165,835,240815],[12,4165,835,239980],[13,4165,835,239145],[14,4165,835,238310],[15,4165,835,237475],[16,4165,835,236640],[17,4165,835,235805],[18,4165,835,234970],[19,4165,835,234135],[20,4165,835,233300],[21,4165,835,232465],[22,4165,835,231630],[23,4165,835,230795],[24,4165,835,229960]]},"check":"regression: interest base","expected":{"balloon":225599,"rows":[[1,4165,835,249165],[2,4151,849,248316],[3,4137,863,247453],[4,4122,878,246575],[5,4108,892,245683],[6,4093,907,244776],[7,4078,922,243854],[8,4062,938,242916],[9,4047,953,241963],[10,4031,969,240994],[11,4015,985,240009],[12,3998,1002,239007],[13,3981,1019,237988],[14,3964,1036,236952],[15,3947,1053,235899],[16,3930,1070,234829],[17,3912,1088,233741],[18,3894,1106,232635],[19,3875,1125,231510],[20,3857,1143,230367],[21,3838,1162,229205],[22,3818,1182,228023],[23,3798,1202,226821],[24,3778,1222,225599]]},"passed":false},{"actual":{"balloon":249500,"rows":[[1,0,500,249500]]},"check":"control 1","expected":{"balloon":249500,"rows":[[1,0,500,249500]]},"passed":true},{"actual":{"error":"negative_amortization","month":1},"check":"control 2","expected":{"error":"negative_amortization","month":1},"passed":true},{"actual":{"balloon":100000,"rows":[]},"check":"control 3","expected":{"balloon":100000,"rows":[]},"passed":true},{"actual":{"error":"negative_amortization","month":1},"check":"control 4","expected":{"error":"negative_amortization","month":1},"passed":true},{"actual":{"error":"negative_amortization","month":1},"check":"control 5","expected":{"error":"negative_amortization","month":1},"passed":true},{"actual":{"error":"negative_amortization","month":1},"check":"control 6","expected":{"error":"negative_amortization","month":1},"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"regression: interest base\", \"actual\": {\"rows\": [[1, 4165, 835, 249165], [2, 4165, 835, 248330], [3, 4165, 835, 247495], [4, 4165, 835, 246660], [5, 4165, 835, 245825], [6, 4165, 835, 244990], [7, 4165, 835, 244155], [8, 4165, 835, 243320], [9, 4165, 835, 242485], [10, 4165, 835, 241650], [11, 4165, 835, 240815], [12, 4165, 835, 239980], [13, 4165, 835, 239145], [14, 4165, 835, 238310], [15, 4165, 835, 237475], [16, 4165, 835, 236640], [17, 4165, 835, 235805], [18, 4165, 835, 234970], [19, 4165, 835, 234135], [20, 4165, 835, 233300], [21, 4165, 835, 232465], [22, 4165, 835, 231630], [23, 4165, 835, 230795], [24, 4165, 835, 229960]], \"balloon\": 229960}, \"expected\": {\"rows\": [[1, 4165, 835, 249165], [2, 4151, 849, 248316], [3, 4137, 863, 247453], [4, 4122, 878, 246575], [5, 4108, 892, 245683], [6, 4093, 907, 244776], [7, 4078, 922, 243854], [8, 4062, 938, 242916], [9, 4047, 953, 241963], [10, 4031, 969, 240994], [11, 4015, 985, 240009], [12, 3998, 1002, 239007], [13, 3981, 1019, 237988], [14, 3964, 1036, 236952], [15, 3947, 1053, 235899], [16, 3930, 1070, 234829], [17, 3912, 1088, 233741], [18, 3894, 1106, 232635], [19, 3875, 1125, 231510], [20, 3857, 1143, 230367], [21, 3838, 1162, 229205], [22, 3818, 1182, 228023], [23, 3798, 1202, 226821], [24, 3778, 1222, 225599]], \"balloon\": 225599}, \"passed\": false}, {\"check\": \"control 1\", \"actual\": {\"rows\": [[1, 0, 500, 249500]], \"balloon\": 249500}, \"expected\": {\"rows\": [[1, 0, 500, 249500]], \"balloon\": 249500}, \"passed\": true}, {\"check\": \"control 2\", \"actual\": {\"error\": \"negative_amortization\", \"month\": 1}, \"expected\": {\"error\": \"negative_amortization\", \"month\": 1}, \"passed\": true}, {\"check\": \"control 3\", \"actual\": {\"rows\": [], \"balloon\": 100000}, \"expected\": {\"rows\": [], \"balloon\": 100000}, \"passed\": true}, {\"check\": \"control 4\", \"actual\": {\"error\": \"negative_amortization\", \"month\": 1}, \"expected\": {\"error\": \"negative_amortization\", \"month\": 1}, \"passed\": true}, {\"check\": \"control 5\", \"actual\": {\"error\": \"negative_amortization\", \"month\": 1}, \"expected\": {\"error\": \"negative_amortization\", \"month\": 1}, \"passed\": true}, {\"check\": \"control 6\", \"actual\": {\"error\": \"negative_amortization\", \"month\": 1}, \"expected\": {\"error\": \"negative_amortization\", \"month\": 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."}}