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Update CBMC dependency to 6.7.1 #4178
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Kani now uses CBMC's latest release. Notably, this includes necessary fixes to improve Kani's quantifier support as well as full aarch64/Linux support, and better constant propagation (which, in turn, required adjusting the `unsupported_num_objects` test so that object creation done in a loop does not get sliced from the formula). Resolves: model-checking#4020
Our perf tests discovered a CBMC bug. We'll need to fix this first on the CBMC side and then create a new CBMC release. |
CBMC fix published in diffblue/cbmc#8668. |
thanhnguyen-aws
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Jul 7, 2025
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from the autogenerated : ## What's Changed * Ensure that contract closures are FnOnce by @vonaka in #4151 * Adjust sized hierarchy for Kani's memory predicates by @tautschnig in #4193 * Update to Rust edition 2024 by @tautschnig in #4197 * `ptr_offset_from`: Replace arithmetic over pointers by offset arithmetic by @tautschnig in #4180 * Automatic cargo update to 2025-07-07 by @github-actions[bot] in #4208 * Bump tests/perf/s2n-quic from `b8f8cca` to `8715fdf` by @dependabot[bot] in #4209 * Upgrade Rust toolchain to 2025-07-04 by @tautschnig in #4199 * Upgrade Rust toolchain to 2025-07-10 by @thanhnguyen-aws in #4215 * Update CBMC dependency to 6.7.1 by @tautschnig in #4178 * Split compiler flags to avoid dependency recompilation by @AlexanderPortland in #4211 * Fix the bug that assign clause cannot be inferred for the inner loop of nested loops by @thanhnguyen-aws in #4179 * Upgrade Rust toolchain to 2025-07-11 by @thanhnguyen-aws in #4219 * Automatic toolchain upgrade to nightly-2025-07-12 by @github-actions[bot] in #4222 * Fix bug: `goto-cc` crash when there are two quantifers in one proof by @thanhnguyen-aws in #4221 * Automatic toolchain upgrade to nightly-2025-07-13 by @github-actions[bot] in #4223 * Automatic cargo update to 2025-07-14 by @github-actions[bot] in #4224 * Cleanup links to issues that have been addressed by @tautschnig in #4200 * Selectively enable and fix (slow) Tokio tests by @tautschnig in #4203 * Bump tests/perf/s2n-quic from `32ba87d` to `1cbd879` by @dependabot[bot] in #4227 * Implement support for Cargo.toml's default-members by @tautschnig in #4201 * Do not invoke memset with count of zero by @tautschnig in #4205 * Support bitwuzla, cvc5, z3 as solver attribute values by @tautschnig in #4218 * Use CBMC's shuffle_vector expression by @tautschnig in #4204 * Move tests from slow/kani back to regular suite by @tautschnig in #4202 * Automatic toolchain upgrade to nightly-2025-07-14 by @github-actions[bot] in #4225 * Enable GitHub Linux/Arm runners in CI by @tautschnig in #3841 * Automatic cargo update to 2025-07-21 by @github-actions[bot] in #4231 * Skip codegen for unneeded harnesses by @AlexanderPortland in #4213 * Strongly type differing compiler args for clarity by @AlexanderPortland in #4220 * Remove StableMIR ICE workaround by @carolynzech in #4235 * Fix bug: Kani unwinds loops with contract in generic function (with -Z loop-contracts) by @thanhnguyen-aws in #4232 * Automatic cargo update to 2025-07-28 by @github-actions[bot] in #4238 * Bump tests/perf/s2n-quic from `1cbd879` to `4938450` by @dependabot[bot] in #4242 * Upgrade Rust toolchain to 2025-07-21 by @tautschnig in #4241 * Remove `pretty_ty` and use rustc_public's formatter instead by @tautschnig in #4243 * Upgrade Rust toolchain to 2025-07-24 by @tautschnig in #4244 * Documentation cleanup of UB detected by Kani by @tautschnig in #4245 * Upgrade Rust toolchain to 2025-07-29 by @tautschnig in #4247 * Automatic toolchain upgrade to nightly-2025-07-30 by @github-actions[bot] in #4253 * Add unstable option prove-safety-only by @tautschnig in #4239 * Set bits_per_byte in byte_extract expressions by @tautschnig in #4255 * `KaniAttributes` Path Resolution Refactor by @carolynzech in #4249 * Automatic toolchain upgrade to nightly-2025-07-31 by @github-actions[bot] in #4256 * Support contracts & stubs in trait implementations (partial fix) by @carolynzech in #4250 * [Breaking Changes] Remove unstable list feature and default memory checks by @carolynzech in #4258 * Upgrade Rust toolchain to 2025-08-01 by @tautschnig in #4261 * Autoharness: add support for references by @tautschnig in #4234 * Turn off debug assertions under `--prove-safety-only` by @tautschnig in #4262 * Automatic toolchain upgrade to nightly-2025-08-02 by @github-actions[bot] in #4264 * Automatic toolchain upgrade to nightly-2025-08-03 by @github-actions[bot] in #4265 * Automatic cargo update to 2025-08-04 by @github-actions[bot] in #4267 * Automatic toolchain upgrade to nightly-2025-08-04 by @github-actions[bot] in #4266 * Introduce thread pool for writing goto binaries in parallel by @AlexanderPortland in #4236 * Major-version update cargo dependencies by @tautschnig in #4240 * Bump tests/perf/s2n-quic from `4938450` to `8f510f0` by @dependabot[bot] in #4270 * Automatic toolchain upgrade to nightly-2025-08-05 by @github-actions[bot] in #4271 * Automatic toolchain upgrade to nightly-2025-08-06 by @github-actions[bot] in #4272 * Avoid updating irrelevant symbols when handling quantifiers by @AlexanderPortland in #4268 * Lazily evaluate debug info by @AlexanderPortland in #4269 * Clone a template `BodyTransformer` to avoid re-initialization by @AlexanderPortland in #4259 * Ensuring that MIR constants are marked as static consts by @vonaka in #4233 * Fix release job dependencies by @tautschnig in #4273 ## New Contributors * @vonaka made their first contribution in #4151 **Full Changelog**: kani-0.64.0...kani-0.65.0 --------- Co-authored-by: Zyad Hassan <88045115+zhassan-aws@users.noreply.github.com>
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Kani now uses CBMC's latest release. Notably, this includes necessary fixes to improve Kani's quantifier support as well as full aarch64/Linux support.
Resolves: #4020
Resolves: #4187
By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 and MIT licenses.