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arXiv 1306.5606cs.AI
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Proteus:一个层次化的求解器和转换组合

Proteus: A Hierarchical Portfolio of Solvers and Transformations

Insight Centre for Data Analytics(Insight数据分析中心);University College Cork(科克大学学院)

Barry Hurley, Lars Kotthoff, Yuri Malitsky, Barry O'Sullivan

摘要:

近年来,解决SAT问题和CSP的组合方法越来越普遍。还有许多不同的编码用于将CSP表示为SAT实例。在本文中,我们利用SAT和CSP求解的进展,提出了一种新的分层投资组合为基础的方法来解决CSP,我们称之为Proteus,不纯粹依赖于CSP求解器。相反,它可以决定最好将CSP问题实例编码为SAT,选择适当的编码和相应的SAT求解器。我们的实验评估使用了一个实例的变形,涉及四个CSP求解器,三个SAT编码,和六个SAT求解器,评估最具挑战性的问题实例从CSP求解器的竞争,涉及全球和内涵的约束。我们表明,显着的性能改善,可以通过利用其他观点和求解器组合解决问题的变形。

英文摘要:

In recent years, portfolio approaches to solving SAT problems and CSPs have become increasingly common. There are also a number of different encodings for representing CSPs as SAT instances. In this paper, we leverage advances in both SAT and CSP solving to present a novel hierarchical portfolio-based approach to CSP solving, which we call Proteus, that does not rely purely on CSP solvers. Instead, it may decide that it is best to encode a CSP problem instance into SAT, selecting an appropriate encoding and a corresponding SAT solver. Our experimental evaluation used an instance of Proteus that involved four CSP solvers, three SAT encodings, and six SAT solvers, evaluated on the most challenging problem instances from the CSP solver competitions, involving global and intensional constraints. We show that significant performance improvements can be achieved by Proteus obtained by exploiting alternative view-points and solvers for combinatorial problem-solving.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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