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Fin consumes one sequence number · case 03

Fin consumes one sequence number.

Member previewVariant 3 · 3 implementations · 4 checks per implementation

Case contract

Bounded offline decision model: fin consumes one sequence number. Inputs are already validated protocol fields; the explicit fixtures define the supported policy, not a complete protocol implementation.

Why this case matters

This deterministic transport flow control model isolates the fin-consumes-one-sequence-number policy at a network component boundary.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
fixture 1	`3`	`4`	Failed

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