(GOAL COMPLEXITY) (STARTTERM (FUNCTIONSYMBOLS l0)) (VAR A B) (RULES l0(A, B) -> Com_1(l1(A, B)) l1(A, B) -> Com_1(l1(A - 1, B + 1)) [ A >= 1 ] l1(A, B) -> Com_1(l2(A, B)) [ 0 >= A ] l2(A, B) -> Com_1(l2(A, B - 1)) [ -A >= 0 /\ B >= 1 ] )