Convex Hull of Arithmetic Automata

  • Authors:
  • Jérôme Leroux

  • Affiliations:
  • LaBRI, Université de Bordeaux, CNRS, Talence, France 33405

  • Venue:
  • SAS '08 Proceedings of the 15th international symposium on Static Analysis
  • Year:
  • 2008

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Abstract

Arithmetic automata recognize infinite words of digits denoting decompositions of real and integer vectors. These automata are known expressive and efficient enough to represent the whole set of solutions of complex linear constraints combining both integral and real variables. In this paper, the closed convex hull of arithmetic automata is proved rational polyhedral. Moreover an algorithm computing the linear constraints defining these convex set is provided. Such an algorithm is useful for effectively extracting geometrical properties of the whole set of solutions of complex constraints symbolically represented by arithmetic automata.