2012 | OriginalPaper | Buchkapitel
Solving Difficult SAT Problems by Using OBDDs and Greedy Clique Decomposition
verfasst von : Yanyan Xu, Wei Chen, Kaile Su, Wenhui Zhang
Erschienen in: Frontiers in Algorithmics and Algorithmic Aspects in Information and Management
Verlag: Springer Berlin Heidelberg
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In this paper, we propose an OBDD-based algorithm called greedy clique decomposition, which is a new variable grouping heuristic method, to solve difficult SAT problems. We implement our algorithm and compare it with several state-of-art SAT solvers including Minisat, Ebddres and TTS. We show that with this new heuristic method, our implementation of an OBDD-based satisfiability solver can perform better for selected difficult SAT problems, whose conflict graphs possess a clique-like structure.