Modular abstractions of reactive nodes using disjunctive invariants

  • Authors:
  • David Monniaux;Martin Bodin

  • Affiliations:
  • CNRS / Verimag, France;CNRS / Verimag, France

  • Venue:
  • APLAS'11 Proceedings of the 9th Asian conference on Programming Languages and Systems
  • Year:
  • 2011

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Abstract

We wish to abstract nodes in a reactive programming language, such as Lustre, into nodes with a simpler control structure, with a bound on the number of control states. In order to do so, we compute disjunctive invariants in predicate abstraction, with a bounded number of disjuncts, then we abstract the node, each disjunct representing an abstract state. The computation of the disjunctive invariant is performed by a form of quantifier elimination expressed using SMT-solving. The same method can also be used to obtain disjunctive loop invariants.