bitwuzla backend#3
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June 29, 2026 08:23
Translate the validated wire IR to Bitwuzla via hand-written FFI bindings (0.9.1). Implements solve, model extraction, named unsat cores, and bit-hunt optimization behind the optional `bitwuzla` cargo feature.
build.rs fetches an upstream prebuilt Bitwuzla static zip per target triple (Linux/macOS/Windows-gnu) and a self-contained MSVC archive from the bitwuzla-msvc fork; resolves GMP/MPFR via pkg-config (upstream) or ships them statically (MSVC).
Add dedicated backend tests and plug BitwuzlaBackend into the phase2 duplicate-symbol/model and phase6 bit-hunt-optimize parametrized test lists.
Update README and architecture docs; add a per-OS bitwuzla CI job that builds with --features bitwuzla.
Drop the `bitwuzla` cargo feature: the backend now builds unconditionally like Z3/Binbit/Qfbvsmtrs (no opt-out, no `--features bitwuzla`). CI keeps GMP/MPFR in the rust job; the standalone bitwuzla job stays removed. README/architecture no longer call out a default or an opt-out.
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adds bitwuzla as a racer to smt-server