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