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This is an automated PR to update Kani metrics. The metrics have been updated by running `./scripts/run-kani.sh --run metrics`. Co-authored-by: github-merge-queue <118344674+github-merge-queue@users.noreply.github.com>
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74 harnesses proving safety of all 10 unsafe functions and 17 safe abstractions listed in Challenge 16, across 13 iterator adapter files. Unbounded verification via large symbolic arrays, loop contracts, and inductive decomposition. 4 representative types (u8, (), char, (char,u8)) cover all behavioral axes of the generic code.
- Remove unused `loop_invariant` import in take.rs and zip.rs (#[cfg_attr(kani, kani::loop_invariant(...))] does not require it) - Rewrite `Zip::get_unchecked` `#[requires(...)]` to avoid `self.index + idx` overflow, using subtraction-based bounds - Clarify "vacuous loop invariant" comments in take.rs and zip.rs — note that `true` is intentional and only enables loop-contract mode - Reword "Loop invariant:" to "Safety argument:" in array_chunks.rs to avoid implying a verified invariant where there is none (bounded harness)
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Testing CI for updated Challenge 16 harnesses before submitting to upstream PR model-checking#549.