Toward the determination of sufficient mutant operators for C†

Mutation testing (MT) has been found to be effective at revealing faults. However, its high cost of application, due to the high number of mutants created and the effort to determine the equivalent ones, has motivated the proposition of alternative approaches for its application. One of them, named ‘selective mutation’, aims to reduce the number of generated mutants through a reduction in the number of mutant operators. A previous relevant study resulted in the proposition of a sufficient mutant operators set for FORTRAN, indicating that it is possible to have a large cost reduction in MT application, whilst preserving a high MT score. This work investigates procedures for the determination of a sufficient mutant operators set for C programs with the perspective of contributing to the establishment of low‐cost, effective mutation‐based testing strategies.