(GOAL COMPLEXITY) (STARTTERM (FUNCTIONSYMBOLS f0)) (VAR A B) (RULES f0(A) -> Com_1(f5(B)) :|: B >= 1 f5(A) -> Com_1(f5(A + 1)) :|: 19 >= A f0(A) -> Com_1(f12(B)) :|: 0 >= B f5(A) -> Com_1(f12(A)) :|: A >= 20 )