Abstract
Signal transition graphs (STGs) are one of the most popular models for the specification of asynchronous circuits. A STG can be implemented if it admits a so-called consistent and complete binary encoding. Checking this is EXPSPACE-hard for arbitrary STGs, and so a lot of attention has been devoted to the subclass of free-choice STGs, which offers a good compromise between expressive power and analyzability. In the last years, polynomial time synthesis techniques have been developed for free-choice STGs, but they assume that the STG has a consistent binary encoding. The first polynomial algorithm for checking consistency is presented here.
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