35. The apparatus of claim 33 , wherein the memory further stores: computer instructions generating a coverage report, responsive to said merging and to a predetermined condition being met.
33. An apparatus, comprising: a computer with a memory storing: computer instructions creating a functional coverage model; computer instructions running random simulations from at least one seed; computer instructions merging coverage logs of the functional coverage model generated by verification of a hardware description language circuit design, as the coverage logs are generated, without waiting for all pending coverage logs; and computer instructions responsive to said merging, analyzing the merged coverage logs, refining the functional coverage model, and importing previous coverage logs.