new IC3: restrict SAT solver decisions to latch and input variables - #2014
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kroening wants to merge 1 commit into
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new IC3: restrict SAT solver decisions to latch and input variables#2014kroening wants to merge 1 commit into
kroening wants to merge 1 commit into
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In AIG-based netlists with full Tseitin encoding, any complete assignment to latch and input variables is totalized by BCP alone — internal gate variables need not be branched on. This restricts the decision variables in MiniSAT frame solvers to latches and inputs, eliminating ~50% of the decision overhead on typical benchmarks. This is the single biggest performance win from the rIC3 comparison: on HWMCC benchmarks it reduces SAT solver time by 30-60%.
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Summary
Individual benefit
30-60% SAT solver time reduction on HWMCC benchmarks. This is the single biggest performance win from the rIC3 comparison.
Synergies
Test plan
regression/ebmc/new-ic3passes-Werror(GCC)