摘要
研究了极小布尔不可满足子式的提取算法 ,它分为近似算法和精确算法两种 文中就精确算法提出了局部预先赋值的优化方案 ,并且在理论上证明了该算法的正确性 ;通过实验显示了此算法可以获得更高的效率 通过模拟实验观察到 ,利用完全算法进行近似提取的一个有趣现象 ,即随着公式密度的增加 。
The paper is concerned with the algorithms for extraction of minimal unsatisfiable (MU) Boolean sub-formula The algorithms include approximate and exact methods We propose a method of pre-assignment for exact algorithm of traversing clauses, and the correctness is proved in theory Furthermore, the experiments demonstrated the efficiency of pre-assignment method Moreover, an observation revealed that the interesting phenomenon occurs in the simulating experiments on approximate method based on complete algorithm, with the increasing density of the formula, the average error of the extraction is decreasing
出处
《计算机辅助设计与图形学学报》
EI
CSCD
北大核心
2004年第11期1542-1546,共5页
Journal of Computer-Aided Design & Computer Graphics
基金
国家自然科学基金 ( 90 2 0 70 0 2
60 2 42 0 0 1)
北京市科技重点项目 ( 0 2 0 12 0 12 0 13 0 )资助
关键词
形式验证
布尔可满足问题
极小布尔不可满足子式
formal verification
Boolean satisfiability problem
minimal unsatisfiable sub-formulas