MAYBE
Trs:
 {  cond(y, x, y) -> s(minus(x, s(y))),
      minus(x, y) -> cond(min(x, y), x, y),
      min(0(), v) -> 0(),
  min(s(u), s(v)) -> s(min(u, v)),
      min(u, 0()) -> 0()}
 Comment:
  We consider a duplicating trs.
  FAIL:
   Open