1. A computer program product for provision of prioritization metrics for post-Si failure localization, the computer program product comprising a computer readable storage medium having program instructions embodied therewith, the program instructions being readable and executable by a processing circuit to cause the processing circuit to: receive an output of a failure localization tool applied to hardware verification debug processing; recognize, from the output, numbers of mis-compared resources to which each instruction of the failure localization tool is related; apply a priority gradient to each instruction based on the corresponding numbers of the mis-compared resources; and conduct further debug processing with respect to each instruction in accordance with the applied priority gradient.