Paper Info
Title
A DPLL(T) Theory Solver for a Theory of Strings and Regular Expressions.
Abstract
An increasing number of applications in verification and security rely on or could benefit from automatic solvers that can check the satisfiability of constraints over a rich set of data types that includes character strings. Unfortunately, most string solvers today are standalone tools that can reason only about (some fragment) of the theory of strings and regular expressions, sometimes with strong restrictions on the expressiveness of their input language. These solvers are based on reductions to satisfiability problems over other data types, such as bit vectors, or to automata decision problems. We present a set of algebraic techniques for solving constraints over the theory of unbounded strings natively, without reduction to other problems. These techniques can be used to integrate string reasoning into general, multi-theory SMT solvers based on the DPLL(T) architecture. We have implemented them in our SMT solver cvc4 to expand its already large set of built-in theories to a theory of strings with concatenation, length, and membership in regular languages. Our initial experimental results show that, in addition, over pure string problems, cvc4 is highly competitive with specialized string solvers with a comparable input language.
Year
DOI
Venue
2014
10.1007/978-3-319-08867-9_43
CAV
Field
DocType
Volume
Regular expression,Decision problem,Computer science,Satisfiability,Algorithm,Theoretical computer science,DPLL algorithm,Concatenation,Regular language,Solver,Satisfiability modulo theories
Conference
8559
ISSN
Citations 
PageRank 
0302-9743
48
1.19
References 
Authors
21
5
Name
Order
Citations
PageRank
Tianyi Liang1582.70
Andrew Reynolds221214.79
Cesare Tinelli3140979.86
Clark Barrett41268108.65
Morgan Deters528317.25