Claude proved 239 library entry points crash-free, using about 180 million lines of Rocq (anthropic.com)
The property is modest: no crash or failed assertion for any input under 64 MB. A typical proof is about 600,000 lines for a binary of roughly 18,000 instructions, and the process found hundreds of bugs, including one needing a ~20 MB input.
The proofs cover static musl builds on RISC-V, not the x86 and glibc most people run.
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