{"abstract":"A repeated result event makes the pending tool count negative.","category":"Agent workflow termination","checks":7,"contract":"Given aggregate pending and result-event counts, return max(0, pending - result_events); event identity is outside this count-only model.","contract_signature":"pending, result_events","evaluation_group":"model-3021c0488a89f258","failed_approach":"Adding one before clamping still leaves a phantom pending count after the final result.","family":"w3-agent-workflow-termination-pending-count-transition","id":"FA-99931","implementations":{"attempt":{"sha256":"69a19bea87b878c92286740d6d1bc306cd0188dd28d43de06480a3fc140a276c","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(pending, result_events):\n    return max(0,pending-result_events+1)\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('one result drains', solve(N,1),N-1)\ncheck('duplicate saturates', solve(1,N+2),0)\ncheck('no events', solve(N,0),N)\ncheck('empty pending', solve(0,0),0)\ncheck('one pending duplicate', solve(1,2),0)\ncheck('all drain', solve(N,N),0)\ncheck('excess events', solve(2,5),0)\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":"51aae47c7b76e36f62da7b2be319c55c463c751a5de48a075f171d5979f72827","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(pending, result_events):\n    return pending-result_events\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('one result drains', solve(N,1),N-1)\ncheck('duplicate saturates', solve(1,N+2),0)\ncheck('no events', solve(N,0),N)\ncheck('empty pending', solve(0,0),0)\ncheck('one pending duplicate', solve(1,2),0)\ncheck('all drain', solve(N,N),0)\ncheck('excess events', solve(2,5),0)\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":"Adding one before clamping avoids a negative count but can leave a phantom pending call. 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":"w3-agent-workflow-termination-pending-count-transition","generated_at":"2026-09-30T16:48:29.887650+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"This toy decision rule isolates one bounded agent-loop completion contract.","root_cause":"Every result event decrements the count without checking whether work remains.","sha256":"473b045cecb0fa3e7ddd30783f9e2edc90ec46092d808421ed7f27af0bb377d1","title":"Workflow: duplicate result decrements pending count twice · case 01","variant":1,"variant_policy":"The fixture code references N, supplied as 1 through 5. Fixed boundary checks may repeat. These records share one mechanism and must remain together in evaluation splits.","verified":true,"visibility":"public","verification":{"attempt":{"elapsed_ms":31.136,"exit_code":1,"observations":[{"actual":1,"check":"one result drains","expected":0,"passed":false},{"actual":0,"check":"duplicate saturates","expected":0,"passed":true},{"actual":2,"check":"no events","expected":1,"passed":false},{"actual":1,"check":"empty pending","expected":0,"passed":false},{"actual":0,"check":"one pending duplicate","expected":0,"passed":true},{"actual":1,"check":"all drain","expected":0,"passed":false},{"actual":0,"check":"excess events","expected":0,"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"one result drains\", \"actual\": 1, \"expected\": 0, \"passed\": false}, {\"check\": \"duplicate saturates\", \"actual\": 0, \"expected\": 0, \"passed\": true}, {\"check\": \"no events\", \"actual\": 2, \"expected\": 1, \"passed\": false}, {\"check\": \"empty pending\", \"actual\": 1, \"expected\": 0, \"passed\": false}, {\"check\": \"one pending duplicate\", \"actual\": 0, \"expected\": 0, \"passed\": true}, {\"check\": \"all drain\", \"actual\": 1, \"expected\": 0, \"passed\": false}, {\"check\": \"excess events\", \"actual\": 0, \"expected\": 0, \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":31.516,"exit_code":1,"observations":[{"actual":0,"check":"one result drains","expected":0,"passed":true},{"actual":-2,"check":"duplicate saturates","expected":0,"passed":false},{"actual":1,"check":"no events","expected":1,"passed":true},{"actual":0,"check":"empty pending","expected":0,"passed":true},{"actual":-1,"check":"one pending duplicate","expected":0,"passed":false},{"actual":0,"check":"all drain","expected":0,"passed":true},{"actual":-3,"check":"excess events","expected":0,"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"one result drains\", \"actual\": 0, \"expected\": 0, \"passed\": true}, {\"check\": \"duplicate saturates\", \"actual\": -2, \"expected\": 0, \"passed\": false}, {\"check\": \"no events\", \"actual\": 1, \"expected\": 1, \"passed\": true}, {\"check\": \"empty pending\", \"actual\": 0, \"expected\": 0, \"passed\": true}, {\"check\": \"one pending duplicate\", \"actual\": -1, \"expected\": 0, \"passed\": false}, {\"check\": \"all drain\", \"actual\": 0, \"expected\": 0, \"passed\": true}, {\"check\": \"excess events\", \"actual\": -3, \"expected\": 0, \"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."}}