Lcm #9
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Lcm #9
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Add flag for LCM, as well as a reverse method.
The current version compiles, but does not respect the PT changes yet. The implemented parameters should be functional. By default, LCM is not active.
When a clause is modified via LCM, tracking the PT level is difficult. As an over approximation, use the level of the current node. This way, we can at least use LCM, and still share clauses downwards correctly. For now, this is good enough, compared to not being able to share clauses at all.
Track the share indexes during LCM. This way, we do not loose sharing information when doing LCM.
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This series implements the approach from "An Effective Learnt Clause Minimization Approach for CDCL SAT Solvers" by Mao Luo, Chu-Min Li, Fan Xiao, Felip Manyà, Zhipeng Lü