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Designing Scalable Parallel SAT Solvers

  • Antti E. J. Hyvärinen
  • Norbert Manthey
Part of the Lecture Notes in Computer Science book series (LNCS, volume 7317)

Abstract

Solving instances of the propositional satisfiability problem (SAT) in parallel has received a significant amount of attention as the number of cores in a typical workstation is steadily increasing. With the increase of the number of cores, in particular the scalability of such approaches becomes essential for fully harnessing the potential of modern architectures. The best parallel SAT solvers have, until recently, been based on algorithm portfolios, while search-space partitioning approaches have been less successful. We prove, under certain natural assumptions on the partitioning function, that search-space partitioning can always result in an increased expected run time, justifying the success of the portfolio approaches. Furthermore, we give first controlled experiments showing that an approach combining elements from partitioning and portfolios scales better than either of the two approaches and succeeds in solving instances not solved in a recent solver competition.

Keywords

Partition Tree Unit Clause Portfolio Approach Partitioning Approach Master Thread 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Antti E. J. Hyvärinen
    • 1
  • Norbert Manthey
    • 2
  1. 1.Department of Information and Computer ScienceAalto UniversityAaltoFinland
  2. 2.Knowledge Representation and Reasoning GroupTechnische Universität DresdenDresdenGermany

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