The focus of this project is formal verification of programs with infinite state spaces. Specifically, we target programs with dynamically allocated pointer data structures and programs manipulating unbounded strings. Verification methods for both of these classes are highly desirable. The former are notoriously error-prone, hard to debug and reason about, and the latter form the main body of web applications where errors may easily lead to security vulnerabilities. We will build on methods based on symbolically encoding sets of program states using finite automata, such as regular model checking. In a connection to that, we will also investigate theory and methods facilitating practical use of finite automata in general. This especially concerns language inclusion and equivalence testing, size reduction and minimization, and decision procedures for the logics WSkS and MSO. The work on the project will include rigorous mathematical description of the developed principles and algorithms as well as their implementation and experimental evaluation.

Description in Czech
Projekt je zaměřen na formální verifikaci programů s nekonečnými stavovými prostory, zvláště pak na programy s dynamicky alokovanými ukazatelovými strukturami a programy manipulující řetězce neohraničené délky. Verifikační nástroje pro obě třídy programů jsou žádoucí. Programy s ukazateli jsou notoricky náchylné k výskytům těžko odhalitelných chyb, programy s řetězci jsou jádrem webových aplikací, kde chyba snadno vede ke kritickým bezpečnostním rizikům. Projekt staví na metodách využívajících konečné automaty jako prostředek symbolické reprezentace nekonečných množin stavů. V souvislosti s tím budeme také vyvíjet technologii umožňující využití nedeterministických konečných automatů v praxi, zejména algoritmy pro testování jazykové inkluze, minimalizaci, a rozhodovací procedury logik MSO a WSkS. Práce na projektu bude vedena rigorózními matematickými metodami a bude zahrnovat implementaci a experimentální vyhodnocení navržených technik a algoritmů.

Keywords
formal verificationinfinite state systemspointer programsstring manipulating programssymbolic encodingregular model checkingfinite automatalanguage inclusionminimizationsimulation relation

Key words in Czech
formální verifikacenekonečně stavové systémyprogramy s ukazateliprogramy manipulující řetězcesymbolická reprezentaceregulární model checkingkonečné automatyjazyková inkluzeminimalizacerelace simulace

GP13-37876P

English

Holík Lukáš, doc. Mgr., Ph.D. - principal person responsible
Lengál Ondřej, Ing., Ph.D. - fellow researcher

Department of Intelligent Systems
- responsible department (4.7.2012 - not assigned)
Department of Intelligent Systems
- responsible department (20.3.2017 - not assigned)
Automated Analysis and Verification Research Group - VeriFIT
- internal (4.7.2012 - 31.12.2015)
Department of Intelligent Systems
- beneficiary (4.7.2012 - 31.12.2015)

HOLÍK, L.; JONSSON, B.; LENGÁL, O.; VOJNAR, T.; TRINH, Q.; ABDULLA, P. Verification of Heap Manipulating Programs with Ordered Data by Extended Forest Automata. FIT-TR-2013-02, Brno: Faculty of Information Technology BUT, 2013. p. 1-35.
Detail

HOLÍK, L.; LENGÁL, O.; ROGALEWICZ, A.; ŠIMÁČEK, J.; VOJNAR, T. Fully Automated Shape Analysis Based on Forest Automata. FIT-TR-2013-01, Brno: Faculty of Information Technology BUT, 2013. p. 1-25.
Detail

HOLÍK, L.; ABDULLA, P.; HAZIZA, F.; JONSSON, B.; REZINE, A. An integrated specification and verification technique for highly concurrent data structures for highly concurrent data structures. International Journal on Software Tools for Technology Transfer, 2017, vol. 5, no. 19, p. 549-563. ISSN: 1433-2779.
Detail

HOLÍK, L.; MEYER, R.; MUSKALLA, S. Antichains for the Verification of Recursive Programs. In Proceedings of International Conference on Networked Systems. Lecture Notes in Computer Science (LNCS). Cham: Springer International Publishing, 2016. p. 322-336. ISBN: 978-3-319-26849-1.
Detail

HOLÍK, L.; ABDULLA, P.; HAZIZA, F. Parameterized verification through view abstraction. International Journal on Software Tools for Technology Transfer, 2015, vol. 2016, no. 5, p. 495-516. ISSN: 1433-2779.
Detail

HOLÍK, L.; MEYER, R.; WOLF, S.; HAZIZA, F. Pointer Race Freedom. In Verification, Model Checking, and Abstract Interpretation (VMCAI). Lecture Notes in Computer Science. Berlin: Springer Verlag, 2016. p. 393-412. ISBN: 978-3-662-49121-8.
Detail

FIEDOR, T.; LENGÁL, O.; HOLÍK, L.; VOJNAR, T.: dwina; dWiNA - An Implementation of Decision Procedure for WS1S. Nástroj i dokumentaci lze získat na URL:http://www.fit.vutbr.cz/research/groups/verifit/tools/dWiNA/. URL: https://www.fit.vut.cz/research/product/432/. (software)
Detail

HOLÍK, L.; CHEN, Y.; REZINE, A.; RUMMER, P.; STENMAN, J.; ABDULLA, P.; ATIG, M. Norn: An SMT Solver for String Constraints. In Computer Aided Verification. Lecture Notes in Computer Science Volume 9206. Cham: Springer International Publishing, 2015. p. 462-469. ISBN: 978-3-319-21689-8.
Detail

HOLÍK, L.; HAZIZA, F.; ABDULLA, P. View Abstraction - A Tutorial. In 2nd International Workshop on Synthesis of Complex Parameters. OpenAccess Series in Informatics (OASIcs). OpenAccess Series in Informatics. Dagstuhl: Schloss Dagstuhl--Leibniz-Zentrum fuer Informatik, 2015. p. 1-15. ISBN: 978-3-939897-82-8. ISSN: 2190-6807.
Detail

HOLÍK, L.; ISBERNER, M.; JONSSON, B. Mediator Synthesis in a Component Algebra with Data. In Correct System Design. Lecture Notes in Computer Science. Berlin: Springer Verlag, 2015. p. 238-259. ISBN: 978-3-319-23505-9.
Detail

HOLÍK, L.; LENGÁL, O.; VOJNAR, T.; JONSSON, B.; TRINH, Q.; ABDULLA, P. Verification of heap manipulating programs with ordered data by extended forest automata. Acta Informatica, 2015, vol. 53, no. 4, p. 357-385. ISSN: 0001-5903.
Detail

HRUŠKA, M.; LENGÁL, O.; ŠIMÁČEK, J.; VOJNAR, T.; HOLÍK, L.; ROGALEWICZ, A. Forester: Shape Analysis Using Tree Automata (Competition Contribution). In Proceedings of TACAS'15. Lecture Notes in Computer Science. Heidelberg: Springer Verlag, 2015. p. 432-435. ISBN: 978-3-662-46680-3.
Detail

FIEDOR, T.; HOLÍK, L.; LENGÁL, O.; VOJNAR, T. Nested Antichains for WS1S. In Proceedings of TACAS'15. Lecture Notes in Computer Science. Heidelberg: Springer Verlag, 2015. p. 658-674. ISBN: 978-3-662-46680-3.
Detail

HOLÍK, L.; VOJNAR, T.; ABDULLA, P.; CHEN, Y. Mediating for reduction (on minimizing alternating Buchi automata). Theoretical Computer Science, 2014, vol. 2014, no. 552, p. 26-43. ISSN: 0304-3975.
Detail

HOLÍK, L.; ABDULLA, P.; ATIG, M.; CHEN, Y.; RUMMER, P.; STENMAN, J. String Constraints for Verification. In 26th International Conference on Computer Aided Verification. Lecture Notes in Computer Science, Volume 8559. Berlin: Springer Verlag, 2014. p. 150-166. ISBN: 978-3-319-08866-2.
Detail

ABDULLA, P.; HAZIZA, F.; HOLÍK, L. Block Me If You Can! Context-Sensitive Parameterized Verification. In 21st International Static Analysis Symposium. Lecture Notes in Computer Science. Lecture Notes in Computer Science. Berlin: Springer Verlag, 2014. p. 1-17. ISBN: 978-3-319-10935-0. ISSN: 0302-9743.
Detail

HOLÍK, L.; JONSSON, B.; LENGÁL, O.; VOJNAR, T.; TRINH, Q.; ABDULLA, P. Verification of Heap Manipulating Programs with Ordered Data by Extended Forest Automata. Proceedings of ATVA'13. Heidelberg: Springer Verlag, 2013. p. 224-239. ISBN: 978-3-319-02443-1.
Detail

HOLÍK, L.; LENGÁL, O.; ROGALEWICZ, A.; ŠIMÁČEK, J.; VOJNAR, T. Fully Automated Shape Analysis Based on Forest Automata. Proceedings of CAV'13. Lecture Notes in Computer Science. Heidelberg: Springer Verlag, 2013. p. 740-755. ISBN: 978-3-642-39798-1. ISSN: 0302-9743.
Detail

Responsibility: Holík Lukáš, doc. Mgr., Ph.D.