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Fibonacci root detection mistakes a self-ring for a root · case 02

The bounded fibonacci rings certificate reports an incorrect root ids.

Member previewVariant 2 · 3 implementations · 7 checks per implementation

Case contract

A finite Fibonacci-ring certificate stores nodes [key,parent,left,right,degree,mark,children]. All references are in range or parent=-1. Report broken circular-link reciprocity, parent-child backlinks, degree mismatch, marked roots, roots, and designated minimum validity.

Why this case matters

This isolates an internal heap representation or priority-structure invariant using deterministic finite records.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
regression certificate 4	`{"backlinks": [], "degrees": [], "minimum_valid": false, "reciprocity": [], "root_ids": [], "root_marks": [0]}`	`{"backlinks": [], "degrees": [], "minimum_valid": false, "reciprocity": [], "root_ids": [0, 1], "root_marks": [0]}`	Failed

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