“…Recently, researchers began focusing on meta-heuristic algorithms as a main algorithm for tway test set generation strategies such as Bat Algorithm (BA) [8][9][10][11][12][13], Hill Climbing (HC) [28], Simulated Annealing (SA) [27,28,31,41], Tabu Search (TS) [47,48], Artificial Bee Colony (ABC) [14][15][16], Particle Swarm Optimization (PSO) [49], Cuckoo Search (CS) [50], Ant Colony Algorithm (ACA) [51], Genetic Algorithm (GA) [52], Kidney Algorithm (KA) [18] and others. The most essential algorithm used for a 2-way test set generation ( also termed pairwise test set generation) is HC [28].…”