{"abstract":"Rto includes variation and clock granularity.","category":"Transport flow control","checks":4,"contract":"Bounded offline decision model: rto includes variation and clock granularity. Inputs are already validated protocol fields; the explicit fixtures define the supported policy, not a complete protocol implementation.","evaluation_group":"xh-rto-includes-variation-and-clock-granularity","failed_approach":"The attempted repair uses `srtt+4*variation` and still violates a separate fixture.","family":"xh-rto-includes-variation-and-clock-granularity","id":"FA-7261","implementations":{"attempt":{"sha256":"37774406061e299993abc404b4ed7693bba90905a5e27d63ed6b34871f42d4e4","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\nimport ipaddress\nimport re\nfrom urllib.parse import urlsplit, urljoin\nN = 1\nobservations = []\ndef solve(srtt, variation, granularity):\n    return srtt+4*variation\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\n_fixtures = [\"check('fixture 1', solve(10, 2, 1), 18)\", \"check('fixture 2', solve(10, 0, 3), 13)\", \"check('fixture 3', solve(0, 0, 1), 1)\", \"check('fixture 4', solve(10, 1, 8), 18)\"]\nfor _line in _fixtures[N % len(_fixtures):] + _fixtures[:N % len(_fixtures)]:\n    exec(_line)\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":"750a4b3da7edec94ce4cbd4dfccaa77a0b6ee66d7b05db6cab65820bc9a48ed4","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\nimport ipaddress\nimport re\nfrom urllib.parse import urlsplit, urljoin\nN = 1\nobservations = []\ndef solve(srtt, variation, granularity):\n    return srtt+variation\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\n_fixtures = [\"check('fixture 1', solve(10, 2, 1), 18)\", \"check('fixture 2', solve(10, 0, 3), 13)\", \"check('fixture 3', solve(0, 0, 1), 1)\", \"check('fixture 4', solve(10, 1, 8), 18)\"]\nfor _line in _fixtures[N % len(_fixtures):] + _fixtures[:N % len(_fixtures)]:\n    exec(_line)\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":"03274d414401ec32906cb9c43b35f64b8444d7e38467aa092c6e58ef4bc61755","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\nimport ipaddress\nimport re\nfrom urllib.parse import urlsplit, urljoin\nN = 1\nobservations = []\ndef solve(srtt, variation, granularity):\n    return srtt+max(granularity,4*variation)\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\n_fixtures = [\"check('fixture 1', solve(10, 2, 1), 18)\", \"check('fixture 2', solve(10, 0, 3), 13)\", \"check('fixture 3', solve(0, 0, 1), 1)\", \"check('fixture 4', solve(10, 1, 8), 18)\"]\nfor _line in _fixtures[N % len(_fixtures):] + _fixtures[:N % len(_fixtures)]:\n    exec(_line)\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":"Bounded deterministic policy model over validated inputs; not a complete protocol stack or an interoperability claim. The five variants rotate the same explicit fixture set. 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":"xh-rto-includes-variation-and-clock-granularity","generated_at":"2026-09-29T14:38:09.927888+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"This deterministic transport flow control model isolates the rto-includes-variation-and-clock-granularity policy at a network component boundary.","repair":"Apply the explicit rto-includes-variation-and-clock-granularity contract, including the tested boundary and negative cases.","root_cause":"The faulty implementation uses `srtt+variation` for the rto-includes-variation-and-clock-granularity decision.","sha256":"d28c0cf9dd5bb8d6ba8992fddfcb63e9b1fa8e04a27ebadbb0463c76a5b5d142","title":"Rto includes variation and clock granularity · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":43.244,"exit_code":1,"observations":[{"actual":10,"check":"fixture 2","expected":13,"passed":false},{"actual":0,"check":"fixture 3","expected":1,"passed":false},{"actual":14,"check":"fixture 4","expected":18,"passed":false},{"actual":18,"check":"fixture 1","expected":18,"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 2\", \"actual\": 10, \"expected\": 13, \"passed\": false}, {\"check\": \"fixture 3\", \"actual\": 0, \"expected\": 1, \"passed\": false}, {\"check\": \"fixture 4\", \"actual\": 14, \"expected\": 18, \"passed\": false}, {\"check\": \"fixture 1\", \"actual\": 18, \"expected\": 18, \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":52.558,"exit_code":1,"observations":[{"actual":10,"check":"fixture 2","expected":13,"passed":false},{"actual":0,"check":"fixture 3","expected":1,"passed":false},{"actual":11,"check":"fixture 4","expected":18,"passed":false},{"actual":12,"check":"fixture 1","expected":18,"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 2\", \"actual\": 10, \"expected\": 13, \"passed\": false}, {\"check\": \"fixture 3\", \"actual\": 0, \"expected\": 1, \"passed\": false}, {\"check\": \"fixture 4\", \"actual\": 11, \"expected\": 18, \"passed\": false}, {\"check\": \"fixture 1\", \"actual\": 12, \"expected\": 18, \"passed\": false}], \"passed\": false}\n"},"fixed":{"elapsed_ms":49.64,"exit_code":0,"observations":[{"actual":13,"check":"fixture 2","expected":13,"passed":true},{"actual":1,"check":"fixture 3","expected":1,"passed":true},{"actual":18,"check":"fixture 4","expected":18,"passed":true},{"actual":18,"check":"fixture 1","expected":18,"passed":true}],"passed":true,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 2\", \"actual\": 13, \"expected\": 13, \"passed\": true}, {\"check\": \"fixture 3\", \"actual\": 1, \"expected\": 1, \"passed\": true}, {\"check\": \"fixture 4\", \"actual\": 18, \"expected\": 18, \"passed\": true}, {\"check\": \"fixture 1\", \"actual\": 18, \"expected\": 18, \"passed\": true}], \"passed\": true}\n"}},"verified":true,"visibility":"public"}