Abstract
In this paper we describe QuBE++, an efficient solver for Quantified Boolean Formulas (QBFs). To the extent of our knowledge, QuBE++ is the first QBF reasoning engine that uses lazy data structures both for unit clauses propagation and for pure literals detection. QuBE++ also features non-chronological backtracking and a branching heuristic that leverages the information gathered during the backtracking phase. Owing to such techniques and to a careful implementation, QuBE++ turns out to be an efficient and robust solver, whose performances exceed those of other state-of-the-art QBF engines, and are comparable with the best engines currently available on SAT instances.
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Giunchiglia, E., Narizzano, M., Tacchella, A. (2004). QuBE++: An Efficient QBF Solver. In: Hu, A.J., Martin, A.K. (eds) Formal Methods in Computer-Aided Design. FMCAD 2004. Lecture Notes in Computer Science, vol 3312. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-30494-4_15
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DOI: https://doi.org/10.1007/978-3-540-30494-4_15
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