Here we compare JANUS 64-bit and Fourier-Motzkin 64-bit: 6_fig:PerfectClub_satisfiability_dimension_JV64_FM64_100 and 6_fig:PerfectClub_satisfiability_dimension_JV64_FM64_filter represent the experimental results of PerfectClub sampled and filtered databases. We can observe that JANUS 64-bit is faster: percent with sampled database and percent with filtered database . For the SPEC95, we have and percent, respectively.