MUS Extraction Using Clausal Proofs

  • Anton Belov
  • Marijn J. H. Heule
  • Joao Marques-Silva
Part of the Lecture Notes in Computer Science book series (LNCS, volume 8561)

Abstract

Recent work introduced an effective method for extraction of reduced unsatisfiable cores of CNF formulas as a by-product of validation of clausal proofs emitted by conflict-driven clause learning SAT solvers. In this paper, we demonstrate that this method for trimming CNF formulas can also benefit state-of-the-art tools for the computation of a Minimal Unsatisfiable Subformula (MUS). Furthermore, we propose a number of techniques that improve the quality of trimming, and demonstrate a significant positive impact on the performance of MUS extractors from the improved trimming.

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Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  • Anton Belov
    • 1
  • Marijn J. H. Heule
    • 2
  • Joao Marques-Silva
    • 1
    • 3
  1. 1.Complex and Adaptive Systems LaboratoryUniversity College DublinIreland
  2. 2.The University of Texas at AustinUSA
  3. 3.IST/INESC-IDTechnical University of LisbonPortugal

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