“…More than one defect in the same program version would make difficult to verify which one of the defects produces a wrong output. We followed the mutation operators related to MPI communication primitives, proposed in (SILVA, 2013), such as ReplModeSend, ReplModeRecv, ChanArg, ReplSource. ReplMode-Send operator replaces the mode of a send in the program, for example, having a blocking Send to a non-blocking send Isend, and ReplModeRecv operator works similarly to but for receive primitives.…”