A combination method for generating interpolants

  • Authors:
  • Greta Yorsh;Madanlal Musuvathi

  • Affiliations:
  • School of Comp. Sci., Tel Aviv Univ.;Microsoft Research, Redmond

  • Venue:
  • CADE' 20 Proceedings of the 20th international conference on Automated Deduction
  • Year:
  • 2005

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Abstract

We present a combination method for generating interpolants for a class of first-order theories. Using interpolant-generation procedures for individual theories as black-boxes, our method modularly generates interpolants for the combined theory. Our combination method applies for a broad class of first-order theories, which we characterize as equality-interpolating Nelson-Oppen theories. This class includes many useful theories such as the quantifier-free theories of uninterpreted functions, linear inequalities over reals, and Lisp structures. The combination method can be implemented within existing Nelson-Oppen-style decision procedures (such as Simplify, Verifun, ICS, CVC-Lite, and Zap).