(GOAL COMPLEXITY) (STARTTERM (FUNCTIONSYMBOLS f0)) (VAR A B C D) (RULES f0(A,B,C) -> Com_1(f1(0,B,C)) f1(A,B,C) -> Com_1(f1(A,B - 1,D)) :|: B >= 1 f1(A,B,C) -> Com_1(f4(A,B,D)) :|: 0 >= B f4(A,B,C) -> Com_1(f4(1,B,D)) )