Ultimate Automizer

Spec sheet

Purpose

Ultimate Automizer is a software model checker that implements an approach based on automata.Read 7 Oct 2026 · ultimate-pa.org

Product

Ultimate Automizer is a software model checker and one toolchain in the Ultimate software analysis framework.Read 7 Oct 2026 · ultimate-pa.org

Audience

The project describes its developers as mostly students and researchers in the University of Freiburg software engineering group.Read 7 Oct 2026 · ultimate-pa.org

Security

The official pages opened describe program verification and provide no security or compliance certification claims.Read 7 Oct 2026 · ultimate-pa.org

Support

The Automizer page invites University of Freiburg students interested in contributing to contact Matthias Heizmann or another Ultimate developer.Read 7 Oct 2026 · ultimate-pa.org

License

The core of Ultimate and many plugins are licensed under LGPLv3 with a linking exception to Eclipse RCP and Eclipse CDT.Read 7 Oct 2026 · ultimate-pa.org

Award

The site reports that Ultimate Automizer won the overall ranking at SV-COMP 2026.Read 7 Oct 2026 · ultimate-pa.org

Command line

The available Automizer archives contain command-line versions that participated in the Competition on Software Verification.Read 7 Oct 2026 · ultimate-pa.org

Concurrency

For concurrency, Automizer uses a Petri-net-based automata model.Read 7 Oct 2026 · github.com

Development

The site says most Ultimate developers are students and researchers in Andreas Podelski’s software engineering group at the University of Freiburg.Read 7 Oct 2026 · ultimate-pa.org

Download

The project says it provides regular releases for Windows and Linux.Read 7 Oct 2026 · ultimate-pa.org

Framework

Automizer is one toolchain in the Ultimate software analysis framework.Read 7 Oct 2026 · ultimate-pa.org

Input

The documented command-line interface accepts an SV-COMP property file and either one C file or a C file with a matching GraphML witness.Read 7 Oct 2026 · ultimate-pa.org

Integration

Automizer is one toolchain within the Ultimate software analysis framework.Read 7 Oct 2026 · ultimate-pa.org

Maintainer

Ultimate Automizer is maintained by Matthias Heizmann.Read 7 Oct 2026 · ultimate-pa.org

Method

Automizer implements an approach based on automata and uses the Ultimate Automata Library.Read 7 Oct 2026 · ultimate-pa.org

Recognition

The Automizer page lists overall SV-COMP wins in 2016, 2017, and 2023 through 2026.Read 7 Oct 2026 · ultimate-pa.org

Trace abstraction

Automizer uses trace abstraction to generalize infeasibility proofs for individual program traces to Floyd-Hoare automata covering larger parts of a program.Read 7 Oct 2026 · github.com

Verification

The web interface lets users verify C programs.Read 7 Oct 2026 · ultimate-pa.org

Where Specifiction places it

• C and C++ Static Analysis Tools#20 of 256.7
• Formal Verification Tools#31 of 356.8