Boogie vs Dafny
Boogie
github.com
Dafny
dafny.orgSide by side
| Figure | Boogie | Dafny |
|---|---|---|
| Price from | Free | — |
| Free plan | Yes | — |
| Free trial | — | — |
| Open source | — | — |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| Self-hosted | — | Yes |
| Plans published | 1 | 0 |
| Spec score · Formal Verification Tools | 8.1 (#7) | 7.8 (#16) |
| License | Boogie is licensed under the MIT License. | The Dafny software is licensed under the MIT License. |
| Purpose | Boogie is an intermediate modeling and verification language used as a layer for building program verifiers for other languages. | It helps developers write code that can be verified against specifications to reduce the risk of late-stage bugs. |
| Requirements | Boogie requires .NET and a supported SMT solver. | The Dafny tool is a .NET 8.0 artifact, and Dafny plus its bundled Z3 tool are sufficient for verification; compiling and running generated programs may require additional tools. |
| Support | The project directs users to its GitHub issue tracker to ask questions and report issues. | The project homepage directs users to a Zulip channel to ask questions about Dafny. |
Plans
In their own words
Boogie
Boogie is a modeling language and tool for building program verifiers for other languages. It accepts Boogie language input, can optionally infer invariants, and generates verification conditions for an SMT solver. Z3 is the default solver; CVC5 and Yices2 support is experimental. The Civl extension lets users model concurrent and distributed systems. Boogie is self-hosted and distributed as a.NET global tool through NuGet. It requires.NET and a supported SMT solver, and the NuGet listing identifies version 3.5.7 as targeting.NET 8.0 or higher. The project uses the MIT License and is free at free. The repository names VCC and HAVOC for C, along with Dafny, Chalice, Spec#, and Move verifiers, as projects built on Boogie. Yices2 has a stated constraint: it works for unquantified fragments such as arrays, arithmetic, and bitvectors, but not for quantifiers, generalized arrays, or datatypes. Users can ask questions or report issues through the project issue tracker, and contributions are accepted through pull requests.