{"abstract":"Account for a redirect chain using a monotonic deadline and separate response timing: the headers latency branch emits an incorrect decision.","category":"HTTP redirects","checks":6,"contract":"Account for a redirect chain using a monotonic deadline and separate response timing. The explicit fixture inputs and outputs define a bounded offline policy; request identity must accompany the decision.","contract_signature":"request, started, headers, released, now, deadline, offset","evaluation_group":"s3-http-redirects-redirect-clock","failed_approach":"The partial repair uses 'headers' and still fails an explicit boundary or control.","family":"s3-http-redirects-redirect-clock-headers-latency","id":"FA-28946","implementations":{"attempt":{"sha256":"6581e833eee079ae35efb1561e07962892ca7a79e704ad6e839760a33ae16e07","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\nfrom urllib.parse import urlsplit, unquote, quote\nimport posixpath\nimport re\nN = 1\nobservations = []\ndef solve(request, started, headers, released, now, deadline, offset):\n    return {'request': request, 'decision': [max(0,deadline-now), headers, released-headers, now-started, now>=deadline, now+offset, deadline, now-released, headers==started, released-started]} \ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('fixture 1', solve('/requests/' + str(N) + '/0', 10, 13, 15, 18, 20, 1000), {'request': '/requests/' + str(N) + '/0', 'decision': [2, 3, 2, 8, False, 1018, 20, 3, False, 5]})\ncheck('fixture 2', solve('/requests/' + str(N) + '/1', 0, 0, 0, 0, 0, 500), {'request': '/requests/' + str(N) + '/1', 'decision': [0, 0, 0, 0, True, 500, 0, 0, True, 0]})\ncheck('fixture 3', solve('/requests/' + str(N) + '/2', 20, 25, 29, 35, 30, -100), {'request': '/requests/' + str(N) + '/2', 'decision': [0, 5, 4, 15, True, -65, 30, 6, False, 9]})\ncheck('fixture 4', solve('/requests/' + str(N) + '/3', 10, 11, 12, 12, 100, 0), {'request': '/requests/' + str(N) + '/3', 'decision': [88, 1, 1, 2, False, 12, 100, 0, False, 2]})\ncheck('fixture 5', solve('/requests/' + str(N) + '/4', 5, 9, 10, 14, 15, 400), {'request': '/requests/' + str(N) + '/4', 'decision': [1, 4, 1, 9, False, 414, 15, 4, False, 5]})\ncheck('fixture 6', solve('/requests/' + str(N) + '/5', 100, 105, 110, 120, 121, -500), {'request': '/requests/' + str(N) + '/5', 'decision': [1, 5, 5, 20, False, -380, 121, 10, False, 10]})\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":"398fc512f90eccf6c4af896a334eacc0302c708fd242a6839fea2226c475e3c4","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\nfrom urllib.parse import urlsplit, unquote, quote\nimport posixpath\nimport re\nN = 1\nobservations = []\ndef solve(request, started, headers, released, now, deadline, offset):\n    return {'request': request, 'decision': [max(0,deadline-now), released-started, released-headers, now-started, now>=deadline, now+offset, deadline, now-released, headers==started, released-started]} \ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('fixture 1', solve('/requests/' + str(N) + '/0', 10, 13, 15, 18, 20, 1000), {'request': '/requests/' + str(N) + '/0', 'decision': [2, 3, 2, 8, False, 1018, 20, 3, False, 5]})\ncheck('fixture 2', solve('/requests/' + str(N) + '/1', 0, 0, 0, 0, 0, 500), {'request': '/requests/' + str(N) + '/1', 'decision': [0, 0, 0, 0, True, 500, 0, 0, True, 0]})\ncheck('fixture 3', solve('/requests/' + str(N) + '/2', 20, 25, 29, 35, 30, -100), {'request': '/requests/' + str(N) + '/2', 'decision': [0, 5, 4, 15, True, -65, 30, 6, False, 9]})\ncheck('fixture 4', solve('/requests/' + str(N) + '/3', 10, 11, 12, 12, 100, 0), {'request': '/requests/' + str(N) + '/3', 'decision': [88, 1, 1, 2, False, 12, 100, 0, False, 2]})\ncheck('fixture 5', solve('/requests/' + str(N) + '/4', 5, 9, 10, 14, 15, 400), {'request': '/requests/' + str(N) + '/4', 'decision': [1, 4, 1, 9, False, 414, 15, 4, False, 5]})\ncheck('fixture 6', solve('/requests/' + str(N) + '/5', 100, 105, 110, 120, 121, -500), {'request': '/requests/' + str(N) + '/5', 'decision': [1, 5, 5, 20, False, -380, 121, 10, False, 10]})\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":"Stipulated offline redirect policy, not a complete HTTP, browser, URL, cache, or security implementation. Numbered variants vary request correlation identity. 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":"s3-http-redirects-redirect-clock-headers-latency","generated_at":"2026-09-29T14:41:38.897448+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"Models a redirect controller decision before following a target or exposing a redirect result.","root_cause":"The headers-latency decision uses 'released-started'; this violates the stipulated controller policy.","sha256":"0e58f735c9ac7128f1423e4a1bb41a5b8e881867911b2fe7fbabae608009e36d","title":"Account for a redirect chain using a monotonic deadline and separate response timing: headers latency · case 01","variant":1,"variant_policy":"N changes request correlation identity. Policy boundary fixtures are reused; numbered variants are not independent examples.","verified":true,"visibility":"public","verification":{"attempt":{"elapsed_ms":39.669,"exit_code":1,"observations":[{"actual":{"decision":[2,13,2,8,false,1018,20,3,false,5],"request":"/requests/1/0"},"check":"fixture 1","expected":{"decision":[2,3,2,8,false,1018,20,3,false,5],"request":"/requests/1/0"},"passed":false},{"actual":{"decision":[0,0,0,0,true,500,0,0,true,0],"request":"/requests/1/1"},"check":"fixture 2","expected":{"decision":[0,0,0,0,true,500,0,0,true,0],"request":"/requests/1/1"},"passed":true},{"actual":{"decision":[0,25,4,15,true,-65,30,6,false,9],"request":"/requests/1/2"},"check":"fixture 3","expected":{"decision":[0,5,4,15,true,-65,30,6,false,9],"request":"/requests/1/2"},"passed":false},{"actual":{"decision":[88,11,1,2,false,12,100,0,false,2],"request":"/requests/1/3"},"check":"fixture 4","expected":{"decision":[88,1,1,2,false,12,100,0,false,2],"request":"/requests/1/3"},"passed":false},{"actual":{"decision":[1,9,1,9,false,414,15,4,false,5],"request":"/requests/1/4"},"check":"fixture 5","expected":{"decision":[1,4,1,9,false,414,15,4,false,5],"request":"/requests/1/4"},"passed":false},{"actual":{"decision":[1,105,5,20,false,-380,121,10,false,10],"request":"/requests/1/5"},"check":"fixture 6","expected":{"decision":[1,5,5,20,false,-380,121,10,false,10],"request":"/requests/1/5"},"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 1\", \"actual\": {\"request\": \"/requests/1/0\", \"decision\": [2, 13, 2, 8, false, 1018, 20, 3, false, 5]}, \"expected\": {\"request\": \"/requests/1/0\", \"decision\": [2, 3, 2, 8, false, 1018, 20, 3, false, 5]}, \"passed\": false}, {\"check\": \"fixture 2\", \"actual\": {\"request\": \"/requests/1/1\", \"decision\": [0, 0, 0, 0, true, 500, 0, 0, true, 0]}, \"expected\": {\"request\": \"/requests/1/1\", \"decision\": [0, 0, 0, 0, true, 500, 0, 0, true, 0]}, \"passed\": true}, {\"check\": \"fixture 3\", \"actual\": {\"request\": \"/requests/1/2\", \"decision\": [0, 25, 4, 15, true, -65, 30, 6, false, 9]}, \"expected\": {\"request\": \"/requests/1/2\", \"decision\": [0, 5, 4, 15, true, -65, 30, 6, false, 9]}, \"passed\": false}, {\"check\": \"fixture 4\", \"actual\": {\"request\": \"/requests/1/3\", \"decision\": [88, 11, 1, 2, false, 12, 100, 0, false, 2]}, \"expected\": {\"request\": \"/requests/1/3\", \"decision\": [88, 1, 1, 2, false, 12, 100, 0, false, 2]}, \"passed\": false}, {\"check\": \"fixture 5\", \"actual\": {\"request\": \"/requests/1/4\", \"decision\": [1, 9, 1, 9, false, 414, 15, 4, false, 5]}, \"expected\": {\"request\": \"/requests/1/4\", \"decision\": [1, 4, 1, 9, false, 414, 15, 4, false, 5]}, \"passed\": false}, {\"check\": \"fixture 6\", \"actual\": {\"request\": \"/requests/1/5\", \"decision\": [1, 105, 5, 20, false, -380, 121, 10, false, 10]}, \"expected\": {\"request\": \"/requests/1/5\", \"decision\": [1, 5, 5, 20, false, -380, 121, 10, false, 10]}, \"passed\": false}], \"passed\": false}\n"},"broken":{"elapsed_ms":40.117,"exit_code":1,"observations":[{"actual":{"decision":[2,5,2,8,false,1018,20,3,false,5],"request":"/requests/1/0"},"check":"fixture 1","expected":{"decision":[2,3,2,8,false,1018,20,3,false,5],"request":"/requests/1/0"},"passed":false},{"actual":{"decision":[0,0,0,0,true,500,0,0,true,0],"request":"/requests/1/1"},"check":"fixture 2","expected":{"decision":[0,0,0,0,true,500,0,0,true,0],"request":"/requests/1/1"},"passed":true},{"actual":{"decision":[0,9,4,15,true,-65,30,6,false,9],"request":"/requests/1/2"},"check":"fixture 3","expected":{"decision":[0,5,4,15,true,-65,30,6,false,9],"request":"/requests/1/2"},"passed":false},{"actual":{"decision":[88,2,1,2,false,12,100,0,false,2],"request":"/requests/1/3"},"check":"fixture 4","expected":{"decision":[88,1,1,2,false,12,100,0,false,2],"request":"/requests/1/3"},"passed":false},{"actual":{"decision":[1,5,1,9,false,414,15,4,false,5],"request":"/requests/1/4"},"check":"fixture 5","expected":{"decision":[1,4,1,9,false,414,15,4,false,5],"request":"/requests/1/4"},"passed":false},{"actual":{"decision":[1,10,5,20,false,-380,121,10,false,10],"request":"/requests/1/5"},"check":"fixture 6","expected":{"decision":[1,5,5,20,false,-380,121,10,false,10],"request":"/requests/1/5"},"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 1\", \"actual\": {\"request\": \"/requests/1/0\", \"decision\": [2, 5, 2, 8, false, 1018, 20, 3, false, 5]}, \"expected\": {\"request\": \"/requests/1/0\", \"decision\": [2, 3, 2, 8, false, 1018, 20, 3, false, 5]}, \"passed\": false}, {\"check\": \"fixture 2\", \"actual\": {\"request\": \"/requests/1/1\", \"decision\": [0, 0, 0, 0, true, 500, 0, 0, true, 0]}, \"expected\": {\"request\": \"/requests/1/1\", \"decision\": [0, 0, 0, 0, true, 500, 0, 0, true, 0]}, \"passed\": true}, {\"check\": \"fixture 3\", \"actual\": {\"request\": \"/requests/1/2\", \"decision\": [0, 9, 4, 15, true, -65, 30, 6, false, 9]}, \"expected\": {\"request\": \"/requests/1/2\", \"decision\": [0, 5, 4, 15, true, -65, 30, 6, false, 9]}, \"passed\": false}, {\"check\": \"fixture 4\", \"actual\": {\"request\": \"/requests/1/3\", \"decision\": [88, 2, 1, 2, false, 12, 100, 0, false, 2]}, \"expected\": {\"request\": \"/requests/1/3\", \"decision\": [88, 1, 1, 2, false, 12, 100, 0, false, 2]}, \"passed\": false}, {\"check\": \"fixture 5\", \"actual\": {\"request\": \"/requests/1/4\", \"decision\": [1, 5, 1, 9, false, 414, 15, 4, false, 5]}, \"expected\": {\"request\": \"/requests/1/4\", \"decision\": [1, 4, 1, 9, false, 414, 15, 4, false, 5]}, \"passed\": false}, {\"check\": \"fixture 6\", \"actual\": {\"request\": \"/requests/1/5\", \"decision\": [1, 10, 5, 20, false, -380, 121, 10, false, 10]}, \"expected\": {\"request\": \"/requests/1/5\", \"decision\": [1, 5, 5, 20, false, -380, 121, 10, false, 10]}, \"passed\": false}], \"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."}}