TRS:
 {f(0(), 1(), x) -> f(x, x, x)}
 POP* + Boolean Semantic Labelling:
  Normal positions:
  pi(f_sl=1) = [1,2,3], pi(f_sl=0) = [1,2,3]
  
Safe positions:
   
  
Precedence:
   f_sl=1 > f_sl=0
   empty
  
Interpretation:
   f^(3):
   000 | 0
   001 | 0
   010 | 0
   011 | 0
   100 | 0
   101 | 0
   110 | 0
   111 | 0
   0^(0):
    | 0
   1^(0):
    | 1
   
  
Labelling:
   f^(3):
   000 | 0
   001 | 0
   010 | 1
   011 | 1
   100 | 0
   101 | 0
   110 | 0
   111 | 0
   0^(0):
    | 0
   1^(0):
    | 0
   
  
Labelled predicative System:
   {f_sl=1(0_sl=0(),1_sl=0(),x;) -> f_sl=0(x,x,x;),
    f_sl=1(0_sl=0(),1_sl=0(),x;) -> f_sl=0(x,x,x;)}
  

  Qed