{"abstract":"Finishing rows are numbered from the setup count upward.","category":"Knitting and sewing pattern grading","checks":8,"contract":"Rows are 1-based. Rows 1..setup are [\"setup\", row]. The next length*repeats rows are [\"repeat\", repeat_number, row_in_repeat] (both 1-based). Later rows are [\"finishing\", k] counting from 1 after the last repeat. row < 1 -> \"error: rows start at 1\".","evaluation_group":"w2-knitting_and_sewing_pattern_grading-row-locator","failed_approach":"Subtracting one repeat fewer offsets the count by a whole repeat.","family":"w2-knitting_and_sewing_pattern_grading-row-locator-finishing-offset","id":"FA-97456","implementations":{"attempt":{"sha256":"d1c46e43bff09bb68d3bb62df8b20f79c32e1dc0aa21fa192c0cb125e2b0c157","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\nimport math\nfrom fractions import Fraction\nN = 1\nobservations = []\ndef solve(row, setup, length, repeats):\n    if row < 1:\n        return 'error: rows start at 1'\n    if row <= setup:\n        return ['setup', row]\n    k = row - setup\n    if k <= length * repeats:\n        return ['repeat', (k - 1) // length + 1, (k - 1) % length + 1]\n    return ['finishing', k - length * (repeats - 1)]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[['last setup row', [4, 4, 8, 3], ['setup', 4]], ['first repeat row', [5, 4, 8, 3], ['repeat', 1, 1]],\n  ['single setup row', [1, 1, 4, 2], ['setup', 1]],\n  ['regression: finishing offset', [43, 1, 4, 1], ['finishing', 38]],\n  ['repair check: finishing offset', [43, 2, 8, 3], ['finishing', 17]],\n  ['generated control 1', [13, 6, 8, 2], ['repeat', 1, 7]],\n  ['generated control 2', [30, 4, 4, 3], ['finishing', 14]],\n  ['generated control 3', [51, 6, 4, 1], ['finishing', 41]]],\n [['first repeat row', [5, 4, 8, 3], ['repeat', 1, 1]], ['single setup row', [1, 1, 4, 2], ['setup', 1]],\n  ['last row of repeat', [12, 4, 8, 3], ['repeat', 1, 8]],\n  ['regression: finishing offset', [37, 1, 4, 5], ['finishing', 16]],\n  ['repair check: finishing offset', [13, 0, 4, 1], ['finishing', 9]],\n  ['generated control 1', [7, 0, 12, 2], ['repeat', 1, 7]],\n  ['generated control 2', [48, 0, 8, 1], ['finishing', 40]],\n  ['generated control 3', [33, 1, 4, 5], ['finishing', 12]]],\n [['single setup row', [1, 1, 4, 2], ['setup', 1]], ['last row of repeat', [12, 4, 8, 3], ['repeat', 1, 8]],\n  ['first finishing row', [29, 4, 8, 3], ['finishing', 1]],\n  ['regression: finishing offset', [35, 1, 8, 2], ['finishing', 18]],\n  ['repair check: finishing offset', [4, 0, 1, 2], ['finishing', 2]],\n  ['generated control 1', [21, 6, 6, 5], ['repeat', 3, 3]],\n  ['generated control 2', [14, 2, 6, 5], ['repeat', 2, 6]],\n  ['generated control 3', [6, 2, 1, 1], ['finishing', 3]]],\n [['last row of repeat', [12, 4, 8, 3], ['repeat', 1, 8]],\n  ['first finishing row', [29, 4, 8, 3], ['finishing', 1]],\n  ['row zero', [0, 2, 4, 2], 'error: rows start at 1'],\n  ['regression: finishing offset', [47, 4, 8, 1], ['finishing', 35]],\n  ['repair check: finishing offset', [56, 0, 4, 2], ['finishing', 48]],\n  ['generated control 1', [44, 2, 6, 1], ['finishing', 36]],\n  ['generated control 2', [41, 4, 12, 2], ['finishing', 13]],\n  ['generated control 3', [52, 6, 1, 1], ['finishing', 45]]],\n [['first finishing row', [29, 4, 8, 3], ['finishing', 1]],\n  ['row zero', [0, 2, 4, 2], 'error: rows start at 1'], ['last setup row', [4, 4, 8, 3], ['setup', 4]],\n  ['regression: finishing offset', [34, 2, 4, 2], ['finishing', 24]],\n  ['repair check: finishing offset', [47, 0, 1, 1], ['finishing', 46]],\n  ['generated control 1', [47, 6, 1, 1], ['finishing', 40]],\n  ['generated control 2', [5, 1, 8, 5], ['repeat', 1, 4]],\n  ['generated control 3', [31, 2, 6, 3], ['finishing', 11]]]]\nfor label, args, expected in fixtures[N - 1]:\n    check(label, solve(*args), expected)\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"},"broken":{"sha256":"d2e0451b301e33503d091aa3bfb1c4e3cabb2d669c1617137b148b3ad0d5ea36","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\nimport math\nfrom fractions import Fraction\nN = 1\nobservations = []\ndef solve(row, setup, length, repeats):\n    if row < 1:\n        return 'error: rows start at 1'\n    if row <= setup:\n        return ['setup', row]\n    k = row - setup\n    if k <= length * repeats:\n        return ['repeat', (k - 1) // length + 1, (k - 1) % length + 1]\n    return ['finishing', row - length * repeats]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[['last setup row', [4, 4, 8, 3], ['setup', 4]], ['first repeat row', [5, 4, 8, 3], ['repeat', 1, 1]],\n  ['single setup row', [1, 1, 4, 2], ['setup', 1]],\n  ['regression: finishing offset', [43, 1, 4, 1], ['finishing', 38]],\n  ['repair check: finishing offset', [43, 2, 8, 3], ['finishing', 17]],\n  ['generated control 1', [13, 6, 8, 2], ['repeat', 1, 7]],\n  ['generated control 2', [30, 4, 4, 3], ['finishing', 14]],\n  ['generated control 3', [51, 6, 4, 1], ['finishing', 41]]],\n [['first repeat row', [5, 4, 8, 3], ['repeat', 1, 1]], ['single setup row', [1, 1, 4, 2], ['setup', 1]],\n  ['last row of repeat', [12, 4, 8, 3], ['repeat', 1, 8]],\n  ['regression: finishing offset', [37, 1, 4, 5], ['finishing', 16]],\n  ['repair check: finishing offset', [13, 0, 4, 1], ['finishing', 9]],\n  ['generated control 1', [7, 0, 12, 2], ['repeat', 1, 7]],\n  ['generated control 2', [48, 0, 8, 1], ['finishing', 40]],\n  ['generated control 3', [33, 1, 4, 5], ['finishing', 12]]],\n [['single setup row', [1, 1, 4, 2], ['setup', 1]], ['last row of repeat', [12, 4, 8, 3], ['repeat', 1, 8]],\n  ['first finishing row', [29, 4, 8, 3], ['finishing', 1]],\n  ['regression: finishing offset', [35, 1, 8, 2], ['finishing', 18]],\n  ['repair check: finishing offset', [4, 0, 1, 2], ['finishing', 2]],\n  ['generated control 1', [21, 6, 6, 5], ['repeat', 3, 3]],\n  ['generated control 2', [14, 2, 6, 5], ['repeat', 2, 6]],\n  ['generated control 3', [6, 2, 1, 1], ['finishing', 3]]],\n [['last row of repeat', [12, 4, 8, 3], ['repeat', 1, 8]],\n  ['first finishing row', [29, 4, 8, 3], ['finishing', 1]],\n  ['row zero', [0, 2, 4, 2], 'error: rows start at 1'],\n  ['regression: finishing offset', [47, 4, 8, 1], ['finishing', 35]],\n  ['repair check: finishing offset', [56, 0, 4, 2], ['finishing', 48]],\n  ['generated control 1', [44, 2, 6, 1], ['finishing', 36]],\n  ['generated control 2', [41, 4, 12, 2], ['finishing', 13]],\n  ['generated control 3', [52, 6, 1, 1], ['finishing', 45]]],\n [['first finishing row', [29, 4, 8, 3], ['finishing', 1]],\n  ['row zero', [0, 2, 4, 2], 'error: rows start at 1'], ['last setup row', [4, 4, 8, 3], ['setup', 4]],\n  ['regression: finishing offset', [34, 2, 4, 2], ['finishing', 24]],\n  ['repair check: finishing offset', [47, 0, 1, 1], ['finishing', 46]],\n  ['generated control 1', [47, 6, 1, 1], ['finishing', 40]],\n  ['generated control 2', [5, 1, 8, 5], ['repeat', 1, 4]],\n  ['generated control 3', [31, 2, 6, 3], ['finishing', 11]]]]\nfor label, args, expected in fixtures[N - 1]:\n    check(label, solve(*args), expected)\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"},"fixed":{"sha256":"60db1b4ab004b87cd373aaeaf11165f16968d0228b228a505534a823c49edbd0","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\nimport math\nfrom fractions import Fraction\nN = 1\nobservations = []\ndef solve(row, setup, length, repeats):\n    if row < 1:\n        return 'error: rows start at 1'\n    if row <= setup:\n        return ['setup', row]\n    k = row - setup\n    if k <= length * repeats:\n        return ['repeat', (k - 1) // length + 1, (k - 1) % length + 1]\n    return ['finishing', k - length * repeats]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[['last setup row', [4, 4, 8, 3], ['setup', 4]], ['first repeat row', [5, 4, 8, 3], ['repeat', 1, 1]],\n  ['single setup row', [1, 1, 4, 2], ['setup', 1]],\n  ['regression: finishing offset', [43, 1, 4, 1], ['finishing', 38]],\n  ['repair check: finishing offset', [43, 2, 8, 3], ['finishing', 17]],\n  ['generated control 1', [13, 6, 8, 2], ['repeat', 1, 7]],\n  ['generated control 2', [30, 4, 4, 3], ['finishing', 14]],\n  ['generated control 3', [51, 6, 4, 1], ['finishing', 41]]],\n [['first repeat row', [5, 4, 8, 3], ['repeat', 1, 1]], ['single setup row', [1, 1, 4, 2], ['setup', 1]],\n  ['last row of repeat', [12, 4, 8, 3], ['repeat', 1, 8]],\n  ['regression: finishing offset', [37, 1, 4, 5], ['finishing', 16]],\n  ['repair check: finishing offset', [13, 0, 4, 1], ['finishing', 9]],\n  ['generated control 1', [7, 0, 12, 2], ['repeat', 1, 7]],\n  ['generated control 2', [48, 0, 8, 1], ['finishing', 40]],\n  ['generated control 3', [33, 1, 4, 5], ['finishing', 12]]],\n [['single setup row', [1, 1, 4, 2], ['setup', 1]], ['last row of repeat', [12, 4, 8, 3], ['repeat', 1, 8]],\n  ['first finishing row', [29, 4, 8, 3], ['finishing', 1]],\n  ['regression: finishing offset', [35, 1, 8, 2], ['finishing', 18]],\n  ['repair check: finishing offset', [4, 0, 1, 2], ['finishing', 2]],\n  ['generated control 1', [21, 6, 6, 5], ['repeat', 3, 3]],\n  ['generated control 2', [14, 2, 6, 5], ['repeat', 2, 6]],\n  ['generated control 3', [6, 2, 1, 1], ['finishing', 3]]],\n [['last row of repeat', [12, 4, 8, 3], ['repeat', 1, 8]],\n  ['first finishing row', [29, 4, 8, 3], ['finishing', 1]],\n  ['row zero', [0, 2, 4, 2], 'error: rows start at 1'],\n  ['regression: finishing offset', [47, 4, 8, 1], ['finishing', 35]],\n  ['repair check: finishing offset', [56, 0, 4, 2], ['finishing', 48]],\n  ['generated control 1', [44, 2, 6, 1], ['finishing', 36]],\n  ['generated control 2', [41, 4, 12, 2], ['finishing', 13]],\n  ['generated control 3', [52, 6, 1, 1], ['finishing', 45]]],\n [['first finishing row', [29, 4, 8, 3], ['finishing', 1]],\n  ['row zero', [0, 2, 4, 2], 'error: rows start at 1'], ['last setup row', [4, 4, 8, 3], ['setup', 4]],\n  ['regression: finishing offset', [34, 2, 4, 2], ['finishing', 24]],\n  ['repair check: finishing offset', [47, 0, 1, 1], ['finishing', 46]],\n  ['generated control 1', [47, 6, 1, 1], ['finishing', 40]],\n  ['generated control 2', [5, 1, 8, 5], ['repeat', 1, 4]],\n  ['generated control 3', [31, 2, 6, 3], ['finishing', 11]]]]\nfor label, args, expected in fixtures[N - 1]:\n    check(label, solve(*args), expected)\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"}},"limitations":"A deterministic toy contract stated in full here; it is a bounded teaching model, not an authoritative reference or standards implementation. 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-knitting_and_sewing_pattern_grading-row-locator-finishing-offset","generated_at":"2026-09-29T14:52:32.376846+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"Row counter apps must map an absolute row number onto setup, repeat and finishing sections.","repair":"Count finishing rows from the end of the last repeat.","root_cause":"The finishing row uses the absolute row, not the offset after setup.","sha256":"6541bae02d26af154b6e97bb2d64a068aaf6ea437a7f91b7311df65dd4837247","title":"Pattern row locator: finishing offset · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":41.42,"exit_code":1,"observations":[{"actual":["setup",4],"check":"last setup row","expected":["setup",4],"passed":true},{"actual":["repeat",1,1],"check":"first repeat row","expected":["repeat",1,1],"passed":true},{"actual":["setup",1],"check":"single setup row","expected":["setup",1],"passed":true},{"actual":["finishing",42],"check":"regression: finishing offset","expected":["finishing",38],"passed":false},{"actual":["finishing",25],"check":"repair check: finishing offset","expected":["finishing",17],"passed":false},{"actual":["repeat",1,7],"check":"generated control 1","expected":["repeat",1,7],"passed":true},{"actual":["finishing",18],"check":"generated control 2","expected":["finishing",14],"passed":false},{"actual":["finishing",45],"check":"generated control 3","expected":["finishing",41],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"last setup row\", \"actual\": [\"setup\", 4], \"expected\": [\"setup\", 4], \"passed\": true}, {\"check\": \"first repeat row\", \"actual\": [\"repeat\", 1, 1], \"expected\": [\"repeat\", 1, 1], \"passed\": true}, {\"check\": \"single setup row\", \"actual\": [\"setup\", 1], \"expected\": [\"setup\", 1], \"passed\": true}, {\"check\": \"regression: finishing offset\", \"actual\": [\"finishing\", 42], \"expected\": [\"finishing\", 38], \"passed\": false}, {\"check\": \"repair check: finishing offset\", \"actual\": [\"finishing\", 25], \"expected\": [\"finishing\", 17], \"passed\": false}, {\"check\": \"generated control 1\", \"actual\": [\"repeat\", 1, 7], \"expected\": [\"repeat\", 1, 7], \"passed\": true}, {\"check\": \"generated control 2\", \"actual\": [\"finishing\", 18], \"expected\": [\"finishing\", 14], \"passed\": false}, {\"check\": \"generated control 3\", \"actual\": [\"finishing\", 45], \"expected\": [\"finishing\", 41], \"passed\": false}], \"passed\": false}\n"},"broken":{"elapsed_ms":41.403,"exit_code":1,"observations":[{"actual":["setup",4],"check":"last setup row","expected":["setup",4],"passed":true},{"actual":["repeat",1,1],"check":"first repeat row","expected":["repeat",1,1],"passed":true},{"actual":["setup",1],"check":"single setup row","expected":["setup",1],"passed":true},{"actual":["finishing",39],"check":"regression: finishing offset","expected":["finishing",38],"passed":false},{"actual":["finishing",19],"check":"repair check: finishing offset","expected":["finishing",17],"passed":false},{"actual":["repeat",1,7],"check":"generated control 1","expected":["repeat",1,7],"passed":true},{"actual":["finishing",18],"check":"generated control 2","expected":["finishing",14],"passed":false},{"actual":["finishing",47],"check":"generated control 3","expected":["finishing",41],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"last setup row\", \"actual\": [\"setup\", 4], \"expected\": [\"setup\", 4], \"passed\": true}, {\"check\": \"first repeat row\", \"actual\": [\"repeat\", 1, 1], \"expected\": [\"repeat\", 1, 1], \"passed\": true}, {\"check\": \"single setup row\", \"actual\": [\"setup\", 1], \"expected\": [\"setup\", 1], \"passed\": true}, {\"check\": \"regression: finishing offset\", \"actual\": [\"finishing\", 39], \"expected\": [\"finishing\", 38], \"passed\": false}, {\"check\": \"repair check: finishing offset\", \"actual\": [\"finishing\", 19], \"expected\": [\"finishing\", 17], \"passed\": false}, {\"check\": \"generated control 1\", \"actual\": [\"repeat\", 1, 7], \"expected\": [\"repeat\", 1, 7], \"passed\": true}, {\"check\": \"generated control 2\", \"actual\": [\"finishing\", 18], \"expected\": [\"finishing\", 14], \"passed\": false}, {\"check\": \"generated control 3\", \"actual\": [\"finishing\", 47], \"expected\": [\"finishing\", 41], \"passed\": false}], \"passed\": false}\n"},"fixed":{"elapsed_ms":44.417,"exit_code":0,"observations":[{"actual":["setup",4],"check":"last setup row","expected":["setup",4],"passed":true},{"actual":["repeat",1,1],"check":"first repeat row","expected":["repeat",1,1],"passed":true},{"actual":["setup",1],"check":"single setup row","expected":["setup",1],"passed":true},{"actual":["finishing",38],"check":"regression: finishing offset","expected":["finishing",38],"passed":true},{"actual":["finishing",17],"check":"repair check: finishing offset","expected":["finishing",17],"passed":true},{"actual":["repeat",1,7],"check":"generated control 1","expected":["repeat",1,7],"passed":true},{"actual":["finishing",14],"check":"generated control 2","expected":["finishing",14],"passed":true},{"actual":["finishing",41],"check":"generated control 3","expected":["finishing",41],"passed":true}],"passed":true,"stderr":"","stdout":"{\"observations\": [{\"check\": \"last setup row\", \"actual\": [\"setup\", 4], \"expected\": [\"setup\", 4], \"passed\": true}, {\"check\": \"first repeat row\", \"actual\": [\"repeat\", 1, 1], \"expected\": [\"repeat\", 1, 1], \"passed\": true}, {\"check\": \"single setup row\", \"actual\": [\"setup\", 1], \"expected\": [\"setup\", 1], \"passed\": true}, {\"check\": \"regression: finishing offset\", \"actual\": [\"finishing\", 38], \"expected\": [\"finishing\", 38], \"passed\": true}, {\"check\": \"repair check: finishing offset\", \"actual\": [\"finishing\", 17], \"expected\": [\"finishing\", 17], \"passed\": true}, {\"check\": \"generated control 1\", \"actual\": [\"repeat\", 1, 7], \"expected\": [\"repeat\", 1, 7], \"passed\": true}, {\"check\": \"generated control 2\", \"actual\": [\"finishing\", 14], \"expected\": [\"finishing\", 14], \"passed\": true}, {\"check\": \"generated control 3\", \"actual\": [\"finishing\", 41], \"expected\": [\"finishing\", 41], \"passed\": true}], \"passed\": true}\n"}},"verified":true,"visibility":"public"}