Publication Details

Trau : SMT solver for string constraints

ABDULLA Parosh A., ATIG Mohamed F., CHEN Yu-Fang, BUI Phi Diep, HOLÍK Lukáš, REZINE Ahmed and RUMMER Philipp. Trau: SMT solver for string constraints. In: Proceedings of the 18th Conference on Formal Methods in Computer-Aided Design. Austin: FMCAD Inc., 2019, pp. 165-169. ISBN 978-0-9835678-8-2. Available from: https://www.cs.utexas.edu/users/hunt/FMCAD/FMCAD18/fmcad2018_proceedings.pdf
Czech title
Trau: řešič řetězcových omezení
Type
conference paper
Language
english
Authors
Abdulla Parosh A. (Uppsala)
Atig Mohamed F. (Uppsala)
Chen Yu-Fang (ASIN)
Bui Phi Diep (Uppsala)
Holík Lukáš, doc. Mgr., Ph.D. (DITS FIT BUT)
Rezine Ahmed, Assoc. Prof. (LIU)
Rummer Philipp (Uppsala)
URL
Keywords

security, web applications, string constraint, automata, flat languages, abstraction, over-under approximation

Abstract

We introduce TRAU, an SMT solver for an expressive constraint language, including word equations, length constraints, context-free membership queries, and transducer constraints. The satisfiability problem for such a class of constraints is in general undecidable. The key idea behind TRAU is a technique called flattening, which searches for satisfying assignments that follow simple patterns. TRAU implements a Counter-Example Guided Abstraction Refinement (CEGAR) framework which contains both an under- and an over-approximation module. The approximations are refined in an automatic manner by information flow between the two modules. The technique implemented by TRAU can handle a rich class of string constraints and has better performance than state-of-the-art string solvers.

Published
2019
Pages
165-169
Proceedings
Proceedings of the 18th Conference on Formal Methods in Computer-Aided Design
Conference
Formal Methods in Computer-Aided Design, Austin, Texas, US
ISBN
978-0-9835678-8-2
Publisher
FMCAD Inc.
Place
Austin, US
DOI
10.23919/FMCAD.2018.8602997
UT WoS
000493916300025
EID Scopus
2-s2.0-85061671269
BibTeX 
@INPROCEEDINGS{FITPUB11906,
   author = "A. Parosh Abdulla and F. Mohamed Atig and Yu-Fang Chen and Diep Phi Bui and Luk\'{a}\v{s} Hol\'{i}k and Ahmed Rezine and Philipp Rummer",
   title = "Trau : SMT solver for string constraints",
   pages = "165--169",
   booktitle = "Proceedings of the 18th Conference on Formal Methods in Computer-Aided Design",
   year = 2019,
   location = "Austin, US",
   publisher = "FMCAD Inc.",
   ISBN = "978-0-9835678-8-2",
   doi = "10.23919/FMCAD.2018.8602997",
   language = "english",
   url = "https://www.fit.vut.cz/research/publication/11906"
}
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