{"abstract":"The bounded rank loss propagation certificate reports an incorrect stop.","category":"Heap invariants","checks":7,"contract":"A stipulated rank-balanced heap repair trace supplies bottom-up nodes [id,stored_rank,left_rank,right_rank], with null child rank -1. Recomputed rank is max child rank if child ranks differ, otherwise child rank+1. A decrease propagates while computed rank is smaller, stopping at first unchanged node. Report local recomputed ranks, decreased ids, stopping id, new prefix ranks, rank drops, and visited count. This models the stated rule only, not every rank-pairing heap variant.","contract_signature":"d","evaluation_group":"s3-heap-model-rank-loss-propagation","failed_approach":"The local patch uses None and still violates the stated relation.","family":"s3-heap-rank-loss-propagation-stop","id":"FA-41291","implementations":{"attempt":{"sha256":"8032e547d86aa7ab5e22c088aebc138b9c1e385bc4701b21fd0fbba6c8af941f","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(d):\n    a=d['nodes']; actual=[max(x[2],x[3]) if x[2]!=x[3] else x[2]+1 for x in a]; changed=[]; stop=None; visited=0\n    for x,r in zip(a,actual):\n        visited+=1\n        if r>=x[1]: stop=x[0]; break\n        changed.append(x[0])\n    return {'computed': actual,\n    'decreased': changed,\n    'stop': None,\n    'prefix_ranks': [r if x[0] in changed else x[1] for x,r in zip(a,actual)],\n    'drops': [x[1]-r for x,r in zip(a,actual) if x[0] in changed],\n    'visited': visited}\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncases = [[({'nodes': []}, {'computed': [], 'decreased': [], 'stop': None, 'prefix_ranks': [], 'drops': [], 'visited': 0}), ({'nodes': [['a', 0, -1, -1]]}, {'computed': [0], 'decreased': [], 'stop': 'a', 'prefix_ranks': [0], 'drops': [], 'visited': 1}), ({'nodes': [['a', 3, 0, 0], ['b', 4, 2, 1], ['c', 3, 2, 2]]}, {'computed': [1, 2, 3], 'decreased': ['a', 'b'], 'stop': 'c', 'prefix_ranks': [1, 2, 3], 'drops': [2, 2], 'visited': 3}), ({'nodes': [['a', 1, 0, 0], ['b', 5, 1, 1]]}, {'computed': [1, 2], 'decreased': [], 'stop': 'a', 'prefix_ranks': [1, 5], 'drops': [], 'visited': 1}), ({'nodes': [['a', 2, 0, -1], ['b', 4, 0, 2], ['c', 7, 2, 3]]}, {'computed': [0, 2, 3], 'decreased': ['a', 'b', 'c'], 'stop': None, 'prefix_ranks': [0, 2, 3], 'drops': [2, 2, 4], 'visited': 3}), ({'nodes': [['a', 4, 2, 2], ['b', 4, 3, 2], ['c', 3, 2, 2], ['d', 8, 1, 0]]}, {'computed': [3, 3, 3, 1], 'decreased': ['a', 'b'], 'stop': 'c', 'prefix_ranks': [3, 3, 3, 8], 'drops': [1, 1], 'visited': 3}), ({'nodes': [['a', 5, 2, 2], ['b', 4, 3, 2], ['c', 3, 2, 2], ['d', 8, 1, 0]]}, {'computed': [3, 3, 3, 1], 'decreased': ['a', 'b'], 'stop': 'c', 'prefix_ranks': [3, 3, 3, 8], 'drops': [2, 1], 'visited': 3})], [({'nodes': []}, {'computed': [], 'decreased': [], 'stop': None, 'prefix_ranks': [], 'drops': [], 'visited': 0}), ({'nodes': [['a', 0, -1, -1]]}, {'computed': [0], 'decreased': [], 'stop': 'a', 'prefix_ranks': [0], 'drops': [], 'visited': 1}), ({'nodes': [['a', 3, 0, 0], ['b', 4, 2, 1], ['c', 3, 2, 2]]}, {'computed': [1, 2, 3], 'decreased': ['a', 'b'], 'stop': 'c', 'prefix_ranks': [1, 2, 3], 'drops': [2, 2], 'visited': 3}), ({'nodes': [['a', 1, 0, 0], ['b', 5, 1, 1]]}, {'computed': [1, 2], 'decreased': [], 'stop': 'a', 'prefix_ranks': [1, 5], 'drops': [], 'visited': 1}), ({'nodes': [['a', 2, 0, -1], ['b', 4, 0, 2], ['c', 7, 2, 3]]}, {'computed': [0, 2, 3], 'decreased': ['a', 'b', 'c'], 'stop': None, 'prefix_ranks': [0, 2, 3], 'drops': [2, 2, 4], 'visited': 3}), ({'nodes': [['a', 4, 2, 2], ['b', 4, 3, 2], ['c', 3, 2, 2], ['d', 8, 1, 0]]}, {'computed': [3, 3, 3, 1], 'decreased': ['a', 'b'], 'stop': 'c', 'prefix_ranks': [3, 3, 3, 8], 'drops': [1, 1], 'visited': 3}), ({'nodes': [['a', 6, 2, 2], ['b', 4, 3, 2], ['c', 3, 2, 2], ['d', 8, 1, 0]]}, {'computed': [3, 3, 3, 1], 'decreased': ['a', 'b'], 'stop': 'c', 'prefix_ranks': [3, 3, 3, 8], 'drops': [3, 1], 'visited': 3})], [({'nodes': []}, {'computed': [], 'decreased': [], 'stop': None, 'prefix_ranks': [], 'drops': [], 'visited': 0}), ({'nodes': [['a', 0, -1, -1]]}, {'computed': [0], 'decreased': [], 'stop': 'a', 'prefix_ranks': [0], 'drops': [], 'visited': 1}), ({'nodes': [['a', 3, 0, 0], ['b', 4, 2, 1], ['c', 3, 2, 2]]}, {'computed': [1, 2, 3], 'decreased': ['a', 'b'], 'stop': 'c', 'prefix_ranks': [1, 2, 3], 'drops': [2, 2], 'visited': 3}), ({'nodes': [['a', 1, 0, 0], ['b', 5, 1, 1]]}, {'computed': [1, 2], 'decreased': [], 'stop': 'a', 'prefix_ranks': [1, 5], 'drops': [], 'visited': 1}), ({'nodes': [['a', 2, 0, -1], ['b', 4, 0, 2], ['c', 7, 2, 3]]}, {'computed': [0, 2, 3], 'decreased': ['a', 'b', 'c'], 'stop': None, 'prefix_ranks': [0, 2, 3], 'drops': [2, 2, 4], 'visited': 3}), ({'nodes': [['a', 4, 2, 2], ['b', 4, 3, 2], ['c', 3, 2, 2], ['d', 8, 1, 0]]}, {'computed': [3, 3, 3, 1], 'decreased': ['a', 'b'], 'stop': 'c', 'prefix_ranks': [3, 3, 3, 8], 'drops': [1, 1], 'visited': 3}), ({'nodes': [['a', 7, 2, 2], ['b', 4, 3, 2], ['c', 3, 2, 2], ['d', 8, 1, 0]]}, {'computed': [3, 3, 3, 1], 'decreased': ['a', 'b'], 'stop': 'c', 'prefix_ranks': [3, 3, 3, 8], 'drops': [4, 1], 'visited': 3})], [({'nodes': []}, {'computed': [], 'decreased': [], 'stop': None, 'prefix_ranks': [], 'drops': [], 'visited': 0}), ({'nodes': [['a', 0, -1, -1]]}, {'computed': [0], 'decreased': [], 'stop': 'a', 'prefix_ranks': [0], 'drops': [], 'visited': 1}), ({'nodes': [['a', 3, 0, 0], ['b', 4, 2, 1], ['c', 3, 2, 2]]}, {'computed': [1, 2, 3], 'decreased': ['a', 'b'], 'stop': 'c', 'prefix_ranks': [1, 2, 3], 'drops': [2, 2], 'visited': 3}), ({'nodes': [['a', 1, 0, 0], ['b', 5, 1, 1]]}, {'computed': [1, 2], 'decreased': [], 'stop': 'a', 'prefix_ranks': [1, 5], 'drops': [], 'visited': 1}), ({'nodes': [['a', 2, 0, -1], ['b', 4, 0, 2], ['c', 7, 2, 3]]}, {'computed': [0, 2, 3], 'decreased': ['a', 'b', 'c'], 'stop': None, 'prefix_ranks': [0, 2, 3], 'drops': [2, 2, 4], 'visited': 3}), ({'nodes': [['a', 4, 2, 2], ['b', 4, 3, 2], ['c', 3, 2, 2], ['d', 8, 1, 0]]}, {'computed': [3, 3, 3, 1], 'decreased': ['a', 'b'], 'stop': 'c', 'prefix_ranks': [3, 3, 3, 8], 'drops': [1, 1], 'visited': 3}), ({'nodes': [['a', 8, 2, 2], ['b', 4, 3, 2], ['c', 3, 2, 2], ['d', 8, 1, 0]]}, {'computed': [3, 3, 3, 1], 'decreased': ['a', 'b'], 'stop': 'c', 'prefix_ranks': [3, 3, 3, 8], 'drops': [5, 1], 'visited': 3})], [({'nodes': []}, {'computed': [], 'decreased': [], 'stop': None, 'prefix_ranks': [], 'drops': [], 'visited': 0}), ({'nodes': [['a', 0, -1, -1]]}, {'computed': [0], 'decreased': [], 'stop': 'a', 'prefix_ranks': [0], 'drops': [], 'visited': 1}), ({'nodes': [['a', 3, 0, 0], ['b', 4, 2, 1], ['c', 3, 2, 2]]}, {'computed': [1, 2, 3], 'decreased': ['a', 'b'], 'stop': 'c', 'prefix_ranks': [1, 2, 3], 'drops': [2, 2], 'visited': 3}), ({'nodes': [['a', 1, 0, 0], ['b', 5, 1, 1]]}, {'computed': [1, 2], 'decreased': [], 'stop': 'a', 'prefix_ranks': [1, 5], 'drops': [], 'visited': 1}), ({'nodes': [['a', 2, 0, -1], ['b', 4, 0, 2], ['c', 7, 2, 3]]}, {'computed': [0, 2, 3], 'decreased': ['a', 'b', 'c'], 'stop': None, 'prefix_ranks': [0, 2, 3], 'drops': [2, 2, 4], 'visited': 3}), ({'nodes': [['a', 4, 2, 2], ['b', 4, 3, 2], ['c', 3, 2, 2], ['d', 8, 1, 0]]}, {'computed': [3, 3, 3, 1], 'decreased': ['a', 'b'], 'stop': 'c', 'prefix_ranks': [3, 3, 3, 8], 'drops': [1, 1], 'visited': 3}), ({'nodes': [['a', 9, 2, 2], ['b', 4, 3, 2], ['c', 3, 2, 2], ['d', 8, 1, 0]]}, {'computed': [3, 3, 3, 1], 'decreased': ['a', 'b'], 'stop': 'c', 'prefix_ranks': [3, 3, 3, 8], 'drops': [6, 1], 'visited': 3})]][N-1]\ncheck('regression certificate 1', solve(cases[0][0]), cases[0][1])\ncheck('regression certificate 2', solve(cases[1][0]), cases[1][1])\ncheck('regression certificate 3', solve(cases[2][0]), cases[2][1])\ncheck('regression certificate 4', solve(cases[3][0]), cases[3][1])\ncheck('regression certificate 5', solve(cases[4][0]), cases[4][1])\ncheck('regression certificate 6', solve(cases[5][0]), cases[5][1])\ncheck('variant-dependent certificate', solve(cases[6][0]), cases[6][1])\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":"9ded1ce096f824f7e4130c1c06373ae772a3d14da5b6cd32a89562865bbf3ffb","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(d):\n    a=d['nodes']; actual=[max(x[2],x[3]) if x[2]!=x[3] else x[2]+1 for x in a]; changed=[]; stop=None; visited=0\n    for x,r in zip(a,actual):\n        visited+=1\n        if r>=x[1]: stop=x[0]; break\n        changed.append(x[0])\n    return {'computed': actual,\n    'decreased': changed,\n    'stop': a[-1][0] if a else None,\n    'prefix_ranks': [r if x[0] in changed else x[1] for x,r in zip(a,actual)],\n    'drops': [x[1]-r for x,r in zip(a,actual) if x[0] in changed],\n    'visited': visited}\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncases = [[({'nodes': []}, {'computed': [], 'decreased': [], 'stop': None, 'prefix_ranks': [], 'drops': [], 'visited': 0}), ({'nodes': [['a', 0, -1, -1]]}, {'computed': [0], 'decreased': [], 'stop': 'a', 'prefix_ranks': [0], 'drops': [], 'visited': 1}), ({'nodes': [['a', 3, 0, 0], ['b', 4, 2, 1], ['c', 3, 2, 2]]}, {'computed': [1, 2, 3], 'decreased': ['a', 'b'], 'stop': 'c', 'prefix_ranks': [1, 2, 3], 'drops': [2, 2], 'visited': 3}), ({'nodes': [['a', 1, 0, 0], ['b', 5, 1, 1]]}, {'computed': [1, 2], 'decreased': [], 'stop': 'a', 'prefix_ranks': [1, 5], 'drops': [], 'visited': 1}), ({'nodes': [['a', 2, 0, -1], ['b', 4, 0, 2], ['c', 7, 2, 3]]}, {'computed': [0, 2, 3], 'decreased': ['a', 'b', 'c'], 'stop': None, 'prefix_ranks': [0, 2, 3], 'drops': [2, 2, 4], 'visited': 3}), ({'nodes': [['a', 4, 2, 2], ['b', 4, 3, 2], ['c', 3, 2, 2], ['d', 8, 1, 0]]}, {'computed': [3, 3, 3, 1], 'decreased': ['a', 'b'], 'stop': 'c', 'prefix_ranks': [3, 3, 3, 8], 'drops': [1, 1], 'visited': 3}), ({'nodes': [['a', 5, 2, 2], ['b', 4, 3, 2], ['c', 3, 2, 2], ['d', 8, 1, 0]]}, {'computed': [3, 3, 3, 1], 'decreased': ['a', 'b'], 'stop': 'c', 'prefix_ranks': [3, 3, 3, 8], 'drops': [2, 1], 'visited': 3})], [({'nodes': []}, {'computed': [], 'decreased': [], 'stop': None, 'prefix_ranks': [], 'drops': [], 'visited': 0}), ({'nodes': [['a', 0, -1, -1]]}, {'computed': [0], 'decreased': [], 'stop': 'a', 'prefix_ranks': [0], 'drops': [], 'visited': 1}), ({'nodes': [['a', 3, 0, 0], ['b', 4, 2, 1], ['c', 3, 2, 2]]}, {'computed': [1, 2, 3], 'decreased': ['a', 'b'], 'stop': 'c', 'prefix_ranks': [1, 2, 3], 'drops': [2, 2], 'visited': 3}), ({'nodes': [['a', 1, 0, 0], ['b', 5, 1, 1]]}, {'computed': [1, 2], 'decreased': [], 'stop': 'a', 'prefix_ranks': [1, 5], 'drops': [], 'visited': 1}), ({'nodes': [['a', 2, 0, -1], ['b', 4, 0, 2], ['c', 7, 2, 3]]}, {'computed': [0, 2, 3], 'decreased': ['a', 'b', 'c'], 'stop': None, 'prefix_ranks': [0, 2, 3], 'drops': [2, 2, 4], 'visited': 3}), ({'nodes': [['a', 4, 2, 2], ['b', 4, 3, 2], ['c', 3, 2, 2], ['d', 8, 1, 0]]}, {'computed': [3, 3, 3, 1], 'decreased': ['a', 'b'], 'stop': 'c', 'prefix_ranks': [3, 3, 3, 8], 'drops': [1, 1], 'visited': 3}), ({'nodes': [['a', 6, 2, 2], ['b', 4, 3, 2], ['c', 3, 2, 2], ['d', 8, 1, 0]]}, {'computed': [3, 3, 3, 1], 'decreased': ['a', 'b'], 'stop': 'c', 'prefix_ranks': [3, 3, 3, 8], 'drops': [3, 1], 'visited': 3})], [({'nodes': []}, {'computed': [], 'decreased': [], 'stop': None, 'prefix_ranks': [], 'drops': [], 'visited': 0}), ({'nodes': [['a', 0, -1, -1]]}, {'computed': [0], 'decreased': [], 'stop': 'a', 'prefix_ranks': [0], 'drops': [], 'visited': 1}), ({'nodes': [['a', 3, 0, 0], ['b', 4, 2, 1], ['c', 3, 2, 2]]}, {'computed': [1, 2, 3], 'decreased': ['a', 'b'], 'stop': 'c', 'prefix_ranks': [1, 2, 3], 'drops': [2, 2], 'visited': 3}), ({'nodes': [['a', 1, 0, 0], ['b', 5, 1, 1]]}, {'computed': [1, 2], 'decreased': [], 'stop': 'a', 'prefix_ranks': [1, 5], 'drops': [], 'visited': 1}), ({'nodes': [['a', 2, 0, -1], ['b', 4, 0, 2], ['c', 7, 2, 3]]}, {'computed': [0, 2, 3], 'decreased': ['a', 'b', 'c'], 'stop': None, 'prefix_ranks': [0, 2, 3], 'drops': [2, 2, 4], 'visited': 3}), ({'nodes': [['a', 4, 2, 2], ['b', 4, 3, 2], ['c', 3, 2, 2], ['d', 8, 1, 0]]}, {'computed': [3, 3, 3, 1], 'decreased': ['a', 'b'], 'stop': 'c', 'prefix_ranks': [3, 3, 3, 8], 'drops': [1, 1], 'visited': 3}), ({'nodes': [['a', 7, 2, 2], ['b', 4, 3, 2], ['c', 3, 2, 2], ['d', 8, 1, 0]]}, {'computed': [3, 3, 3, 1], 'decreased': ['a', 'b'], 'stop': 'c', 'prefix_ranks': [3, 3, 3, 8], 'drops': [4, 1], 'visited': 3})], [({'nodes': []}, {'computed': [], 'decreased': [], 'stop': None, 'prefix_ranks': [], 'drops': [], 'visited': 0}), ({'nodes': [['a', 0, -1, -1]]}, {'computed': [0], 'decreased': [], 'stop': 'a', 'prefix_ranks': [0], 'drops': [], 'visited': 1}), ({'nodes': [['a', 3, 0, 0], ['b', 4, 2, 1], ['c', 3, 2, 2]]}, {'computed': [1, 2, 3], 'decreased': ['a', 'b'], 'stop': 'c', 'prefix_ranks': [1, 2, 3], 'drops': [2, 2], 'visited': 3}), ({'nodes': [['a', 1, 0, 0], ['b', 5, 1, 1]]}, {'computed': [1, 2], 'decreased': [], 'stop': 'a', 'prefix_ranks': [1, 5], 'drops': [], 'visited': 1}), ({'nodes': [['a', 2, 0, -1], ['b', 4, 0, 2], ['c', 7, 2, 3]]}, {'computed': [0, 2, 3], 'decreased': ['a', 'b', 'c'], 'stop': None, 'prefix_ranks': [0, 2, 3], 'drops': [2, 2, 4], 'visited': 3}), ({'nodes': [['a', 4, 2, 2], ['b', 4, 3, 2], ['c', 3, 2, 2], ['d', 8, 1, 0]]}, {'computed': [3, 3, 3, 1], 'decreased': ['a', 'b'], 'stop': 'c', 'prefix_ranks': [3, 3, 3, 8], 'drops': [1, 1], 'visited': 3}), ({'nodes': [['a', 8, 2, 2], ['b', 4, 3, 2], ['c', 3, 2, 2], ['d', 8, 1, 0]]}, {'computed': [3, 3, 3, 1], 'decreased': ['a', 'b'], 'stop': 'c', 'prefix_ranks': [3, 3, 3, 8], 'drops': [5, 1], 'visited': 3})], [({'nodes': []}, {'computed': [], 'decreased': [], 'stop': None, 'prefix_ranks': [], 'drops': [], 'visited': 0}), ({'nodes': [['a', 0, -1, -1]]}, {'computed': [0], 'decreased': [], 'stop': 'a', 'prefix_ranks': [0], 'drops': [], 'visited': 1}), ({'nodes': [['a', 3, 0, 0], ['b', 4, 2, 1], ['c', 3, 2, 2]]}, {'computed': [1, 2, 3], 'decreased': ['a', 'b'], 'stop': 'c', 'prefix_ranks': [1, 2, 3], 'drops': [2, 2], 'visited': 3}), ({'nodes': [['a', 1, 0, 0], ['b', 5, 1, 1]]}, {'computed': [1, 2], 'decreased': [], 'stop': 'a', 'prefix_ranks': [1, 5], 'drops': [], 'visited': 1}), ({'nodes': [['a', 2, 0, -1], ['b', 4, 0, 2], ['c', 7, 2, 3]]}, {'computed': [0, 2, 3], 'decreased': ['a', 'b', 'c'], 'stop': None, 'prefix_ranks': [0, 2, 3], 'drops': [2, 2, 4], 'visited': 3}), ({'nodes': [['a', 4, 2, 2], ['b', 4, 3, 2], ['c', 3, 2, 2], ['d', 8, 1, 0]]}, {'computed': [3, 3, 3, 1], 'decreased': ['a', 'b'], 'stop': 'c', 'prefix_ranks': [3, 3, 3, 8], 'drops': [1, 1], 'visited': 3}), ({'nodes': [['a', 9, 2, 2], ['b', 4, 3, 2], ['c', 3, 2, 2], ['d', 8, 1, 0]]}, {'computed': [3, 3, 3, 1], 'decreased': ['a', 'b'], 'stop': 'c', 'prefix_ranks': [3, 3, 3, 8], 'drops': [6, 1], 'visited': 3})]][N-1]\ncheck('regression certificate 1', solve(cases[0][0]), cases[0][1])\ncheck('regression certificate 2', solve(cases[1][0]), cases[1][1])\ncheck('regression certificate 3', solve(cases[2][0]), cases[2][1])\ncheck('regression certificate 4', solve(cases[3][0]), cases[3][1])\ncheck('regression certificate 5', solve(cases[4][0]), cases[4][1])\ncheck('regression certificate 6', solve(cases[5][0]), cases[5][1])\ncheck('variant-dependent certificate', solve(cases[6][0]), cases[6][1])\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 stipulated offline diagnostic model; it does not implement a production allocator, concurrency protocol, or complete heap library. 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-heap-rank-loss-propagation-stop","generated_at":"2026-09-29T14:43:39.701760+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"This isolates an internal heap representation or priority-structure invariant using deterministic finite records.","root_cause":"Rank-loss propagation identifies its stopping ancestor rather than always reaching the root.","sha256":"2512407ef0209811670e30b99bdbdc8c79104b31b2850473f9cd8545ae4d95f6","title":"Rank-loss propagation identifies its stopping ancestor rather than always reaching the root · case 01","variant":1,"variant_policy":"Six explicit regression certificates are retained; a seventh changes structural size, position, priority, or bounds with N.","verified":true,"visibility":"public","verification":{"attempt":{"elapsed_ms":48.079,"exit_code":1,"observations":[{"actual":{"computed":[],"decreased":[],"drops":[],"prefix_ranks":[],"stop":null,"visited":0},"check":"regression certificate 1","expected":{"computed":[],"decreased":[],"drops":[],"prefix_ranks":[],"stop":null,"visited":0},"passed":true},{"actual":{"computed":[0],"decreased":[],"drops":[],"prefix_ranks":[0],"stop":null,"visited":1},"check":"regression certificate 2","expected":{"computed":[0],"decreased":[],"drops":[],"prefix_ranks":[0],"stop":"a","visited":1},"passed":false},{"actual":{"computed":[1,2,3],"decreased":["a","b"],"drops":[2,2],"prefix_ranks":[1,2,3],"stop":null,"visited":3},"check":"regression certificate 3","expected":{"computed":[1,2,3],"decreased":["a","b"],"drops":[2,2],"prefix_ranks":[1,2,3],"stop":"c","visited":3},"passed":false},{"actual":{"computed":[1,2],"decreased":[],"drops":[],"prefix_ranks":[1,5],"stop":null,"visited":1},"check":"regression certificate 4","expected":{"computed":[1,2],"decreased":[],"drops":[],"prefix_ranks":[1,5],"stop":"a","visited":1},"passed":false},{"actual":{"computed":[0,2,3],"decreased":["a","b","c"],"drops":[2,2,4],"prefix_ranks":[0,2,3],"stop":null,"visited":3},"check":"regression certificate 5","expected":{"computed":[0,2,3],"decreased":["a","b","c"],"drops":[2,2,4],"prefix_ranks":[0,2,3],"stop":null,"visited":3},"passed":true},{"actual":{"computed":[3,3,3,1],"decreased":["a","b"],"drops":[1,1],"prefix_ranks":[3,3,3,8],"stop":null,"visited":3},"check":"regression certificate 6","expected":{"computed":[3,3,3,1],"decreased":["a","b"],"drops":[1,1],"prefix_ranks":[3,3,3,8],"stop":"c","visited":3},"passed":false},{"actual":{"computed":[3,3,3,1],"decreased":["a","b"],"drops":[2,1],"prefix_ranks":[3,3,3,8],"stop":null,"visited":3},"check":"variant-dependent certificate","expected":{"computed":[3,3,3,1],"decreased":["a","b"],"drops":[2,1],"prefix_ranks":[3,3,3,8],"stop":"c","visited":3},"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"regression certificate 1\", \"actual\": {\"computed\": [], \"decreased\": [], \"stop\": null, \"prefix_ranks\": [], \"drops\": [], \"visited\": 0}, \"expected\": {\"computed\": [], \"decreased\": [], \"stop\": null, \"prefix_ranks\": [], \"drops\": [], \"visited\": 0}, \"passed\": true}, {\"check\": \"regression certificate 2\", \"actual\": {\"computed\": [0], \"decreased\": [], \"stop\": null, \"prefix_ranks\": [0], \"drops\": [], \"visited\": 1}, \"expected\": {\"computed\": [0], 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