This paper describes an approximate approach for combinational equivalence checking. We propose an architecture such that a virtually-zero aliasing rate is obtained in a single-pass probability calculation. Furthermore, the aliasing rate can be easily configured in various precision by designers. We conduct experiments on a set of ISCAS'85 benchmarks. Experimental results show that with virtually-zero aliasing rate, for example, 10 −74 , our approach is more efficient than those exact approaches.
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