Table 4: Mutant killing results for subject programs.

Subject programsNumber of killed mutants under 𝐺 𝑟 𝑜 𝑢 𝑝 𝐼 ( 𝑀 𝐼 )Number of killed mutants under 𝐺 𝑟 𝑜 𝑢 𝑝 𝐼 𝐼 ( 𝑀 𝐼 𝐼 ) Mutation score (M)Test suite size

Make Call 26 35 0.93 191
Credit Card Payment 8 5 1.00 16
Paper Registration 32 22 1.00 67
PIN Validation 18 22 0.80 121