CPAchecker vs TLA+
CPAchecker
cpachecker.sosy-lab.orgTLA+
lamport.azurewebsites.netSide by side
| Figure | CPAchecker | TLA+ |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| Self-hosted | Yes | — |
| Plans published | 1 | 1 |
| Spec score · Formal Verification Tools | 8.0 (#10) | 7.5 (#24) |
| Purpose | CPAchecker is a tool for configurable software verification based on configurable program analysis concepts. | TLA+ is a high-level language for modeling software and hardware systems, especially concurrent and distributed systems. |
| Support | The project directs installation questions, bug reports, and suggestions to its CPAchecker users mailing list, and also provides an issue tracker. | The TLA+ Foundation directs technical questions and issues to the appropriate GitHub issue tracker. |
Plans
In their own words
CPAchecker
CPAchecker is a configurable software verification tool based on configurable program analysis concepts. It accepts C and SV-LIB inputs, lists predicate analysis for SV-LIB programs, and supports invariants, counterexamples, and proof artifacts. It can also validate termination witnesses in YAML formats 2.1 and 1.0. The project lists a hybrid verification method and provides a self-hosted deployment. CPAchecker is free software under the Apache 2.0 License. Version 4.2.2, released in December 2025, is available as Unix and Windows ZIP archives; Debian and Ubuntu users can install it from the SoSy-Lab APT repository, and a Docker image is available. Java 21 or later is required as of version 4.2. An older version, 1.6.1, can be accessed through a web interface, where some functions are unavailable in the restricted environment. Documentation includes installation instructions, tutorials, and getting-started guidance. Installation questions, bug reports, and suggestions can go to the users mailing list or issue tracker. The project is based in Munich, Germany.
TLA+
TLA+ has no write-up on Specifiction yet; its figures are above.