FA-41019 / Heap invariants / Member archive

Heap meld attaches the source representative to the destination representative · case 04

The bounded meld ownership certificate reports an incorrect union.

Member previewVariant 4 · 3 implementations · 7 checks per implementation

Case contract

A destructive heap meld uses owner union representatives. Parent mapping owner->owner is acyclic and includes every referenced owner. Merge source representative into destination representative; source wrapper becomes empty but live handles from either representative remain resolvable through the union. Report representatives before meld, parent mapping after meld, source size, destination size, accepted handle owners, and whether self-component meld is a no-op.

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 3	`{"accepted": ["a", "b", "c", "d"], "destination_size": 5, "noop": false, "representatives": ["a", "d"], "source_size": 0, "union": {"a": "a", "b": "a", "c": "b", "d": "c"}}`	`{"accepted": ["a", "b", "c", "d"], "destination_size": 5, "noop": false, "representatives": ["a", "d"], "source_size": 0, "union": {"a": "a", "b": "a", "c": "b", "d": "a"}}`	Failed

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