(GOAL COMPLEXITY) (STARTTERM (FUNCTIONSYMBOLS f1)) (VAR A B C) (RULES f1(A, B, C) -> Com_1(f0(A, B, C)) f0(A, B, C) -> Com_1(f0(A + C, B, C - 1)) [ A >= 1 ] f0(A, B, C) -> Com_1(f2(A, D, C)) [ 0 >= A ] )