Computing minimal separating DFAs and regular invariants using SAT and SMT solvers

  • Authors:
  • Daniel Neider

  • Affiliations:
  • Lehrstuhl für Informatik 7, RWTH Aachen University, Germany

  • Venue:
  • ATVA'12 Proceedings of the 10th international conference on Automated Technology for Verification and Analysis
  • Year:
  • 2012

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Abstract

We develop a generic technique to compute minimal separating DFAs (deterministic finite automata) and regular invariants. Our technique works by expressing the desired properties of a solution in terms of logical formulae and using SAT or SMT solvers to find solutions. We apply our technique to three concrete problems: computing minimal separating DFAs (e.g., used in compositional verification), regular model checking, and synthesizing loop invariants of integer programs that are expressible in Presburger arithmetic.