(GOAL COMPLEXITY) (STARTTERM (FUNCTIONSYMBOLS l0)) (VAR A B C D) (RULES l0(A,B,C,D) -> Com_1(l1(0,B,C,D)) l1(A,B,C,D) -> Com_1(l1(A + 1,B - 1,C,D)) :|: B >= 1 l1(A,B,C,D) -> Com_1(l2(A,B,A,D)) :|: 0 >= B l2(A,B,C,D) -> Com_1(l3(A,B,C,C)) :|: C >= 1 l3(A,B,C,D) -> Com_1(l3(A,B,C,D - 1)) :|: D >= 1 && C >= 1 l3(A,B,C,D) -> Com_1(l2(A,B,C - 1,D)) :|: 0 >= D && C >= 1 )