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