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文献:(该文献在2023年做了进一步更新)
On the Structure of the Boolean Satisfiability Problem: A Survey
第6节:
Based on the large body of research, the proposed structural measures related to the SAT formula are based on properties related directly to the CNF formula (e.g. [49, 65, 79, 110, 111]) or a graph encoding of it (e.g. [10, 12, 15, 44, 67, 103]). However, the success of SAT is not just restricted to the CNF formula. Today, advances in SAT have revealed the ability of modern solvers to handle formulas in the abundance of parity (xor) constraints [98]. Moreover, SAT has been successfully applied in many practical areas, including software model checking [57], knowledge-compilation [29], and bioinformatics [74], among others. Thus, investigating the structure of SAT based on other encoding is an open research area.
第3.1.1节
The hardness of the generated benchmarks in Table 1 were attested based on either number of DP calls [78], number of branches [14], average number of nodes in proof tree [18], CPU time [13, 84], the number of backtracks [62], or number of conflicts [45]. The experiments of Newsham et al. [84] and Zulkoski et al. [110, 111] concluded that traditional factors such as the number of variables, clauses, or the clause-to-variable ratio of industrial instances, in particular, do not correlate with CDCL based solver performance.
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