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Counterexample-guided abstraction-refinement (CEGAR) has been en vogue for the automatic verification of very large systems in the past years. When trying to apply CEGAR to the verification of prob-abilistic systems, various foundational questions and practical tradeoffs arise. This paper explores them in the context of predicate abstraction.
Craig interpolation for satisfiability modulo theory formulas have come more into focus for applications of formal verification. In this paper we, introduce a method to reduce the size of linear constraints used in the description of already computed interpolant in the theory of linear arithmetic with respect to the number of linear constraints. We… (More)