Input TRS:
    1: fib(0()) -> 0()
    2: fib(s(0())) -> s(0())
    3: fib(s(s(x))) -> +(fib(s(x)),fib(x))
Number of strict rules: 3
Direct Order(PosReal,>,Poly) ... removes: 1 3 2
     s(x1)	weight: (/ 1 8) + 2 * x1
   fib(x1)	weight: (/ 1 8) + x1
     0()	weight: 0
     +(x1,x2)	weight: x1 + x2
Number of strict rules: 0
YES