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https://github.com/xldenis/creusot
Creusot helps you prove your code is correct in an automated fashion.
https://github.com/xldenis/creusot
deductive-reasoning formal-methods formal-verification proof rust rust-lang verification why3
Last synced: 2 months ago
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Creusot helps you prove your code is correct in an automated fashion.
- Host: GitHub
- URL: https://github.com/xldenis/creusot
- Owner: creusot-rs
- License: lgpl-2.1
- Created: 2021-01-25T15:49:30.000Z (almost 4 years ago)
- Default Branch: master
- Last Pushed: 2024-05-06T15:27:48.000Z (6 months ago)
- Last Synced: 2024-05-09T19:43:42.950Z (6 months ago)
- Topics: deductive-reasoning, formal-methods, formal-verification, proof, rust, rust-lang, verification, why3
- Language: Rust
- Homepage:
- Size: 36 MB
- Stars: 981
- Watchers: 19
- Forks: 45
- Open Issues: 112
-
Metadata Files:
- Readme: README.md
- Contributing: CONTRIBUTING.md
- License: LICENSE
Awesome Lists containing this project
- awesome-rust-formalized-reasoning - Creusot - tool for deductive verification of Rust code. (Projects / Verification)
README
*Le marteau-pilon, forges et aciéries de Saint-Chamond, Joseph-Fortuné LAYRAUD, 1889*
# About
**Creusot** is a *deductive verifier* for Rust code. It verifies your code is safe from panics, overflows, and assertion failures. By adding annotations you can take it further and verify your code does the *correct* thing.
Creusot works by translating Rust code to WhyML, the verification and specification language of [Why3](https://why3.lri.fr). Users can then leverage the full power of Why3 to (semi)-automatically discharge the verification conditions!
See [ARCHITECTURE.md](ARCHITECTURE.md) for technical details.
## Help and Discussions
If you need help using Creusot or would like to discuss, you can post on the [discussions forum](https://github.com/creusot-rs/creusot/discussions) or join our [Zulip chat](https://why3.zulipchat.com/#narrow/stream/341707-creusot)!
## Citing Creusot
If you would like to cite Creusot in academic contexts, we encourage you to use our [ICFEM'22 publication](https://hal.inria.fr/hal-03737878/file/main.pdf).
# Examples of Verification
To get an idea of what verifying a program with Creusot looks like, we encourage you to take a look at some of our test suite:
- [Zeroing out a vector](creusot/tests/should_succeed/vector/01.rs)
- [Binary search on Vectors](creusot/tests/should_succeed/vector/04_binary_search.rs)
- [Sorting a vector](creusot/tests/should_succeed/vector/02_gnome.rs)
- [IterMut](creusot/tests/should_succeed/iterators/02_iter_mut.rs)
- [Normalizing If-Then-Else Expressions](creusot/tests/should_succeed/ite_normalize.rs)
More examples are found in [creusot/tests/should_succeed](creusot/tests/should_succeed).
## Projects built with Creusot
- [CreuSAT](https://github.com/sarsko/creusat) is a verified SAT solver written in Rust and verified with Creusot. It really pushes the tool to its limits and gives an idea of what 'use in anger' looks like.
- Another big project is in the works :)
# Installing Creusot as a user
1. [Install `rustup`](https://www.rust-lang.org/tools/install), to get the suitable Rust toolchain
2. [Get `opam`](https://opam.ocaml.org/doc/Install.html), the package manager for OCaml
3. Clone the [creusot](https://github.com/creusot-rs/creusot/) repository,
then *move into the `creusot` directory* for the rest of the setup.
```
$ git clone https://github.com/creusot-rs/creusot
$ cd creusot
```
4. Set up **Why3** and **Alt-Ergo**. Create a local `opam` switch with why3 and alt-ergo:
```
$ opam switch create -y . ocaml.4.14.1
$ eval $(opam env)
```
This will build why3, alt-ergo and their ocaml dependencies in a local `_opam` directory.
5. Build **Creusot**:
```
$ cargo install --path creusot-rustc
$ cargo install --path cargo-creusot
```
this will build the `cargo-creusot` and `creusot-rustc` executables and place them in `~/.cargo/bin`.
6. Set up **Creusot**:
```
$ cargo creusot setup install
```
this will download additional solvers (Z3, CVC4, CVC5) and configure Why3 to use them.
# Upgrading Creusot
1. Enter the cloned Creusot git repository used previously to install Creusot
2. Update Creusot's sources:
```
$ git pull
```
2. Upgrade Why3 and Alt-Ergo if needed:
```
$ eval $(opam env)
$ opam update
$ opam install .
```
3. Rebuild and reinstall Creusot:
```
$ cargo install --path creusot-rustc
$ cargo install --path cargo-creusot
```
4. Re-run Creusot's setup:
```
$ cargo creusot setup install
```
# Verifying with Creusot and Why3
See the [guide](https://creusot-rs.github.io/creusot/).
# Hacking on Creusot
See [HACKING.md](HACKING.md) for information on the developer workflow for
hacking on the Creusot codebase.