sharpSAT – Counting Models with Advanced Component Caching and Implicit BCP

  • Marc Thurley
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4121)


We introduce sharpSAT, a new #SAT solver that is based on the well known DPLL algorithm and techniques from SAT and #SAT solvers. Most importantly, we introduce an entirely new approach of coding components, which reduces the cache size by at least one order of magnitude, and a new cache management scheme. Furthermore, we apply a well known look ahead based on BCP in a manner that is well suited for #SAT solving. We show that these techniques are highly beneficial, especially on large structured instances, such that our solver performs significantly better than other #SAT solvers.


Conjunctive Normal Form Cache Size Unit Clause Bound Model Check Branch Variable 


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Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Marc Thurley
    • 1
  1. 1.Institut für InformatikHumboldt-Universität zu Berlin 

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