Abstract:We examine the problem of defining equivalence between two functions (pieces of code) that are intended to perform analogous tasks, but whose interfaces do not correspond in a straightforward way, even to the point of ambiguity. We formalize the notion of what equivalence means in such a case and show how to check it using constraints on a model checking problem. We show that the presence of constraints complicates the issue of predicate abstraction, and show that nevertheless we can use predicates no finer th… Show more
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