Improved Single Pass Algorithms for Resolution Proof Reduction
Improved Single Pass Algorithms for Resolution Proof Reduction
复制标题
改进的单通道算法可降低分辨率证明
DOI:
10.1007/978-3-642-33386-6_10
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发表时间:
2012
期刊:
影响因子:
--
通讯作者:
Ashutosh Gupta
中科院分区:
文献类型:
--
作者:
Ashutosh Gupta
Unsatisfiability proofs find many applications in verification. Today, many SAT solvers are capable of producingresolution proofsof unsatisfiability. For efficiency smaller proofs are preferred over bigger ones. The solvers apply proof reduction methods to remove redundant parts of the proofs while and after generating the proofs. One method of reducing resolution proofs isredundant resolution reduction, i.e., removing repeated pivots in the paths of resolution proofs (akaPivot recycle). The known single pass algorithm only tries to remove redundancies in the parts of the proof that are trees. In this paper, we presentthreemodifications to improve the algorithm such that the redundancies can be found in the parts of the proofs that are DAGs. The first modified algorithm covers greater number of redundancies as compared to the known algorithm without incurring any additional cost. The second modified algorithm covers even greater number of the redundancies but it may have longer run times. Our third modified algorithm is parametrized and can trade off between run times and the coverage of the redundancies. We have implemented our algorithms in OpenSMT and applied them on unsatisfiability proofs of 198 examples from plain MUS track of SAT11 competition. The first and second algorithm additionally remove 0.89% and 10.57% of clauses respectively as compared to the original algorithm. For certain value of the parameter, the third algorithm removes almost as many clauses as the second algorithm but is significantly faster.
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DOI:
--
发表时间:
2008
期刊:
Journal of automated reasoning
影响因子:
--
作者:
Hasan Amjad
通讯作者:
Hasan Amjad
DOI:
--
发表时间:
2007
期刊:
International Conference/Workshop on Computer Aided Systems Theory
影响因子:
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作者:
C. Sinz
通讯作者:
C. Sinz
DOI:
10.1017/s0890060403171065
发表时间:
2003-02
期刊:
Artificial Intelligence for Engineering Design, Analysis and Manufacturing
影响因子:
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作者:
C. Sinz;Andreas Kaiser;W. Küchlin
通讯作者:
C. Sinz;Andreas Kaiser;W. Küchlin
DOI:
10.1007/978-3-642-14203-1_9
发表时间:
2010
期刊:
Proceedings of the 2015 Conference on Certified Programs and Proofs
影响因子:
--
作者:
S. Böhme;T. Nipkow
通讯作者:
T. Nipkow
DOI:
--
发表时间:
2007
期刊:
International Workshop Automated Verification Critical Systems
影响因子:
--
作者:
Hasan Amjad
通讯作者:
Hasan Amjad