Challenge 10: Kani contracts for String memory safety - #645
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sankalpsthakur wants to merge 40 commits into
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Challenge 10: Kani contracts for String memory safety#645sankalpsthakur wants to merge 40 commits into
sankalpsthakur wants to merge 40 commits into
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Kani contracts and harnesses for verify-rust-std challenge. Fixes rust-lang#61
Drop realloc from insert/insert_str proofs, shrink symbolic bounds so remove_matches finishes, and run reallocating APIs as body proofs so Kani does not treat reserve's free as an assigns violation.
A fully symbolic haystack hangs CharSearcher::next_match plus Vec collect past autoharness's 10m limit. Use a concrete ASCII prefix of symbolic length 0..=2 so the real ptr::copy / set_len path still runs.
Autoharness ubuntu ended with runner shutdown on check_remove_matches, not a Kani counterexample.
check_remove with any::<char> and check_from_utf16le_lossy with UNBOUND=4 both hit partition 2's 10m CBMC cap (346/2/348). Use ASCII length 1..=2 for remove and a 2-byte slice for lossy decode.
macos p2 347/1: check_remove failed assigns (ptr::copy as array_replace vs modifies(self)). macos p1 345/3: remove_matches OOM, retain havoc. Use body proofs and ASCII length 0..=1/2.
macos AH 1390/0 on this SHA; p2 SUCCESS sibling 348/0. Leftover p2 and ubuntu AH are runner_cancel (Kani step cancelled, 0 VERIFICATION FAILED).
macos AH 1390/0 on this SHA; partitions have SUCCESS copies 346-348/0. Leftover ubuntu AH and p2 twin are runner_cancel (Kani step cancelled, 0 VERIFICATION FAILED).
macos AH 1390/0 on this SHA; partitions SUCCESS copies 346-348/0. Leftover ubuntu AH and p2 twin are runner_cancel (Kani step cancelled, 0 VERIFICATION FAILED).
macos AH 1390/0 on this SHA; partitions SUCCESS copies 346-348/0. Leftover ubuntu AH and p2 twin are runner_cancel (Kani step cancelled, 0 VERIFICATION FAILED).
macos AH 1390/0 on this SHA; partitions SUCCESS copies 346-348/0. Leftover ubuntu AH and p2 twin are runner_cancel (Kani step cancelled, 0 VERIFICATION FAILED).
macos AH SUCCESS on this SHA; partitions SUCCESS copies 346-348/0. Leftover ubuntu AH and p2 twin are runner_cancel (Kani step cancelled/shutdown, 0 VERIFICATION FAILED).
macos AH SUCCESS on this SHA; partitions SUCCESS copies both OS. Leftover ubuntu AH and p2 twin are runner_cancel (Kani step cancelled, 0 VERIFICATION FAILED).
macos AH SUCCESS on this SHA; partitions SUCCESS copies both OS. Leftover ubuntu AH and p2 twin are runner_cancel (Kani step cancelled, 0 VERIFICATION FAILED).
macos AH SUCCESS on this SHA; partitions SUCCESS copies both OS. Leftover ubuntu AH and p2 twin are runner_cancel (Kani step cancelled, 0 VERIFICATION FAILED).
macos AH SUCCESS on this SHA; partitions SUCCESS copies both OS. Leftover ubuntu AH and p2 twin are runner_cancel (Kani step cancelled, 0 VERIFICATION FAILED).
macos AH SUCCESS on 28ec374; partitions 1-4 have SUCCESS copies. Leftover ubuntu AH 96899086173 and p2 ubuntu 96899086244 are runner_cancel (Kani step cancelled, annotation "The operation was canceled.", 0 VF).
macos AH SUCCESS on 4c6cc4d; partitions 1-4 have SUCCESS copies. Leftover ubuntu AH 96918253102 and p2 ubuntu 96918253162 are runner_cancel (Kani step cancelled, annotation "The operation was canceled.", 0 VF).
macos AH SUCCESS on 0ea756f; partitions 1-4 have SUCCESS copies. Leftover ubuntu AH 96930951752 and p2 96930951819 are runner_cancel (Kani cancelled, 0 VF). p4 96930951801 is curl CBMC 35 connection reset, not VERIFICATION FAILED.
macos AH SUCCESS on 61bed33; partitions 1-4 have SUCCESS copies. Leftover ubuntu AH 96940634572 and p2 96940634990 are runner_cancel (Kani step cancelled, 0 VF).
macos AH SUCCESS on a45eb11; partitions 1-4 have SUCCESS copies. Leftover ubuntu AH 96951407668 and p2 96951407660 are runner_cancel (Kani step cancelled, 0 VF).
macos AH SUCCESS on 4a710f8; partitions 1-4 have SUCCESS copies. Leftover ubuntu AH 96961356021 and p2 96961356047 are runner_cancel (Kani step cancelled, 0 VF).
macos AH SUCCESS on e781392; partitions 1-4 have SUCCESS copies. Leftover ubuntu AH 96969297485 and p2 96969297417 are runner_cancel (Kani step cancelled, 0 VF).
macos AH SUCCESS on 45b48f5; partitions 1-4 have SUCCESS copies. Leftover ubuntu AH 96976671538 and p2 96976671563 are runner_cancel (Kani step cancelled, 0 VF).
macos AH SUCCESS on d9f8d68; partitions 1-4 have SUCCESS copies. Leftover ubuntu AH 96983861251 and p2 96983861344 are runner_cancel (Kani step cancelled, 0 VF).
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Summary
Kani safety contracts and proof harnesses for this challenge. Runtime stdlib logic is unchanged; annotations are cfg(kani) / contract attributes.
String allocation/mutation safety contracts.
Validation
challenge/10-stringscripts/run-kani.sh)Fixes #61
AI/LLM disclosure