Flata

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FLATA is a toolset for the manipulation and the analysis of non-deterministic integer programs (also known as counter automata). The main functionalities of FLATA are:

• reachability anaylysis -- deciding if an error state of a non-recursive programs is reachable from an initial state

• termination analysis -- computation of termination preconditions for non-recursive programs

• summarization for recursive programs -- computation of summaries of recursive programs

The input to the tool is a textual description of a counter automaton (see examples below), essentially a control flow .

Download

FLATA is a free software under LGPL license. The current distribution of FLATA is available here: flata.tgz

A good way to get started using FLATA is to go through one of the examples (a subset of NTS benchmarks that FLATA can veriify) linked here: benchmarks.tgz

Installation

Prerequisites:

• JAVA version 1.6.0 or later

• YICES has to be installed in your executable path

• ANTLR and NTS has to be installed in your JAVA classpath

Run FLATA as e.g.

See the README file for further information.

Documentation

The following papers are related to the FLATA project:

- M. Bozga, R. Iosif and F. Konecny. [{Fast Acceleration of Ultimately Periodic Relations}->http://www-verimag.imag.fr/TR/TR-2010-3.pdf] VERIMAG TR-2010-3

- M. Bozga, C. Girlea and R. Iosif. [{Iterating Octagons}->http://www-verimag.imag.fr/%7Eiosif/papers/tacas09.ps] TACAS 2009

- M. Bozga, R. Iosif and Y. Lakhnech [{Flat Parametric Counter Automata}->http://www-verimag.imag.fr/%7Eiosif/papers/fundamenta09.ps] Fundamenta Informaticae, Volume 91 (2), 275 - 303, IOS Press (2009)

A white paper describing the functionalities of the toolset, and including a detailed description of the input syntax and options will be coming soon.

Extensions

It is possible to use FLATA in order to solve the satisfiability problem for Template:SIL (Singly Indexed Logic), a logic used to specify properties of integer arrays. The extension can be downloaded here:

- [flata-with-sil jar file->http://www.fit.vutbr.cz/~ikonecny/flata/sil.tgz] - [sil-examples.tar.gz->http://www.fit.vutbr.cz/~ikonecny/flata/sil-examples.tgz]

A description of the SIL logic and its applications can be found in the following papers:

- P. Habermehl, R. Iosif, T. Vojnar. [{A Logic of Singly Indexed Arrays}->http://www-verimag.imag.fr/%7Eiosif/papers/lpar08.ps] LPAR'08

- M. Bozga, P. Habermehl, R. Iosif, F. Konecny, T. Vojnar. [{Automatic Verification of Integer Array Programs}->http://www-verimag.imag.fr/%7Eiosif/papers/cav09.ps] CAV'09

Contributors

• Marius Bozga (VERIMAG, Grenoble, France)
• Radu Iosif (VERIMAG, Grenoble, France)
• Filip Konecny (VERIMAG and Brno University of Technology)
• Tomas Vojnar (Brno University of Technology, Czech Republic)

Acknowledgements

This work was supported by the French national project ANR-09-SEGI-016 VERIDYC, by the Czech Science Foundation (projects P103/10/0306 and 102/09/H042), the Czech Ministry of Education (projects COST OC10009 and MSM 0021630528), and the internal FIT BUT grant FIT-S-10-1.

References

<ref name="cav10">[seplogic.pdf Fast Acceleration of Ultimately Periodic Relations.] M. Bozga, R. Iosif, and F. Konecny. In Proc. of CAV'10, volume 6174 of LNCS, pages 227-242, 2010. Springer-Verlag. </ref>

<ref name="tacas12">[seplogic.pdf Deciding Conditional Termination.] M. Bozga, R. Iosif, and F. Konecny. In Proc. of TACAS'12, volume 7214 of LNCS, pages 252-266, 2012. Springer-Verlag. </ref>

<ref name="tacas13">[seplogic.pdf Underapproximation of Procedure Summaries for Integer Programs.] P. Ganty, R. Iosif and F. Konecny. In Proc. of TACAS'13. To appear. </ref>

<ref name="fm12">[seplogic.pdf A Verification Toolkit for Numerical Transition Systems.] H. Hojjat, R. Iosif, F. Konecny, V. Kuncak, and P. Rummer. In Proc. of FM'12, volume 7436 of LNCS, pages 247-251, 2012. Springer-Verlag. </ref>

<ref name="tacas13">[seplogic.pdf Accelerating Interpolants.] P. Ganty, R. Iosif and F. Konecny. In Proc. of ATVA'12, volume 7561 of LNCS, pages 187-202, 2012. Springer-Verlag. </ref>

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