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