Boolean Equi-propagation for Optimized SAT Encoding [chapter]

Amit Metodi, Michael Codish, Vitaly Lagoon, Peter J. Stuckey
<span title="">2011</span> <i title="Springer Berlin Heidelberg"> <a target="_blank" rel="noopener" href="" style="color: black;">Lecture Notes in Computer Science</a> </i> &nbsp;
We present an approach to propagation based SAT encoding, Boolean equi-propagation, where constraints are modelled as Boolean functions which propagate information about equalities between Boolean literals. This information is then applied as a form of partial evaluation to simplify constraints prior to their encoding as CNF formulae. We demonstrate for a variety of benchmarks that our approach leads to a considerable reduction in the size of CNF encodings and subsequent speed-ups in SAT solving times.
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="">doi:10.1007/978-3-642-23786-7_47</a> <a target="_blank" rel="external noopener" href="">fatcat:zo5yhg65ifbtnbdobh2nagzoqi</a> </span>
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