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Iteration exhaustion is reported as convergence · case 05

Iteration exhaustion is reported as convergence.

Member previewVariant 5 · 3 implementations · 6 checks per implementation

Case contract

Nonnegative residual, tolerance, iteration and budget: converged if residual<=tol; otherwise exhausted if iteration>=budget; else continue. Objective delta alone never certifies convergence.

Why this case matters

This deterministic solver-step model isolates an algorithmic invariant used by iterative optimization implementations.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
stagnation with budget	`"converged"`	`"continue"`	Failed

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