YES
* Step 1: UnsatPaths YES
    + Considered Problem:
        Rules:
          0. start(A,B,C,D,E,F)  -> stop(A,B,C,F,E,F)       [A + -1*F >= 0         (?,1)
                                                             && -1*A + F >= 0           
                                                             && D + -1*E >= 0           
                                                             && -1*D + E >= 0           
                                                             && B + -1*C >= 0           
                                                             && -1*B + C >= 0           
                                                             && 0 >= A                  
                                                             && B = C                   
                                                             && D = E                   
                                                             && F = A]                  
          1. start(A,B,C,D,E,F)  -> lbl52(A,-1 + B,C,F,E,F) [A + -1*F >= 0         (?,1)
                                                             && -1*A + F >= 0           
                                                             && D + -1*E >= 0           
                                                             && -1*D + E >= 0           
                                                             && B + -1*C >= 0           
                                                             && -1*B + C >= 0           
                                                             && A >= 1                  
                                                             && C >= 1                  
                                                             && B = C                   
                                                             && D = E                   
                                                             && F = A]                  
          2. start(A,B,C,D,E,F)  -> lbl72(A,F,C,-1 + F,E,F) [A + -1*F >= 0         (?,1)
                                                             && -1*A + F >= 0           
                                                             && D + -1*E >= 0           
                                                             && -1*D + E >= 0           
                                                             && B + -1*C >= 0           
                                                             && -1*B + C >= 0           
                                                             && A >= 1                  
                                                             && 0 >= C                  
                                                             && B = C                   
                                                             && D = E                   
                                                             && F = A]                  
          3. lbl52(A,B,C,D,E,F)  -> lbl52(A,-1 + B,C,D,E,F) [A + -1*F >= 0         (?,1)
                                                             && -1 + F >= 0             
                                                             && -2 + D + F >= 0         
                                                             && -1*D + F >= 0           
                                                             && -1 + B + F >= 0         
                                                             && -2 + A + F >= 0         
                                                             && -1*A + F >= 0           
                                                             && A + -1*D >= 0           
                                                             && -1 + D >= 0             
                                                             && -1 + B + D >= 0         
                                                             && -2 + A + D >= 0         
                                                             && B >= 0                  
                                                             && -1 + A + B >= 0         
                                                             && -1 + A >= 0             
                                                             && D >= 1                  
                                                             && B >= 1                  
                                                             && A >= D                  
                                                             && F = A]                  
          4. lbl52(A,B,C,D,E,F)  -> lbl72(A,F,C,-1 + D,E,F) [A + -1*F >= 0         (?,1)
                                                             && -1 + F >= 0             
                                                             && -2 + D + F >= 0         
                                                             && -1*D + F >= 0           
                                                             && -1 + B + F >= 0         
                                                             && -2 + A + F >= 0         
                                                             && -1*A + F >= 0           
                                                             && A + -1*D >= 0           
                                                             && -1 + D >= 0             
                                                             && -1 + B + D >= 0         
                                                             && -2 + A + D >= 0         
                                                             && B >= 0                  
                                                             && -1 + A + B >= 0         
                                                             && -1 + A >= 0             
                                                             && D >= 1                  
                                                             && A >= D                  
                                                             && B = 0                   
                                                             && F = A]                  
          5. lbl72(A,B,C,D,E,F)  -> stop(A,B,C,D,E,F)       [B + -1*F >= 0         (?,1)
                                                             && A + -1*F >= 0           
                                                             && -1 + F >= 0             
                                                             && -1 + D + F >= 0         
                                                             && -1 + -1*D + F >= 0      
                                                             && -2 + B + F >= 0         
                                                             && -1*B + F >= 0           
                                                             && -2 + A + F >= 0         
                                                             && -1*A + F >= 0           
                                                             && -1 + B + -1*D >= 0      
                                                             && -1 + A + -1*D >= 0      
                                                             && D >= 0                  
                                                             && -1 + B + D >= 0         
                                                             && -1 + A + D >= 0         
                                                             && A + -1*B >= 0           
                                                             && -1 + B >= 0             
                                                             && -2 + A + B >= 0         
                                                             && -1*A + B >= 0           
                                                             && -1 + A >= 0             
                                                             && A >= 1                  
                                                             && D = 0                   
                                                             && F = A                   
                                                             && B = A]                  
          6. lbl72(A,B,C,D,E,F)  -> lbl52(A,-1 + B,C,D,E,F) [B + -1*F >= 0         (?,1)
                                                             && A + -1*F >= 0           
                                                             && -1 + F >= 0             
                                                             && -1 + D + F >= 0         
                                                             && -1 + -1*D + F >= 0      
                                                             && -2 + B + F >= 0         
                                                             && -1*B + F >= 0           
                                                             && -2 + A + F >= 0         
                                                             && -1*A + F >= 0           
                                                             && -1 + B + -1*D >= 0      
                                                             && -1 + A + -1*D >= 0      
                                                             && D >= 0                  
                                                             && -1 + B + D >= 0         
                                                             && -1 + A + D >= 0         
                                                             && A + -1*B >= 0           
                                                             && -1 + B >= 0             
                                                             && -2 + A + B >= 0         
                                                             && -1*A + B >= 0           
                                                             && -1 + A >= 0             
                                                             && D >= 1                  
                                                             && A >= 1                  
                                                             && A >= 1 + D              
                                                             && F = A                   
                                                             && B = A]                  
          7. start0(A,B,C,D,E,F) -> start(A,C,C,E,E,A)      True                   (1,1)
        Signature:
          {(lbl52,6);(lbl72,6);(start,6);(start0,6);(stop,6)}
        Flow Graph:
          [0->{},1->{3,4},2->{5,6},3->{3,4},4->{5,6},5->{},6->{3,4},7->{0,1,2}]
        
    + Applied Processor:
        UnsatPaths
    + Details:
        We remove following edges from the transition graph: [(6,4)]
* Step 2: FromIts YES
    + Considered Problem:
        Rules:
          0. start(A,B,C,D,E,F)  -> stop(A,B,C,F,E,F)       [A + -1*F >= 0         (?,1)
                                                             && -1*A + F >= 0           
                                                             && D + -1*E >= 0           
                                                             && -1*D + E >= 0           
                                                             && B + -1*C >= 0           
                                                             && -1*B + C >= 0           
                                                             && 0 >= A                  
                                                             && B = C                   
                                                             && D = E                   
                                                             && F = A]                  
          1. start(A,B,C,D,E,F)  -> lbl52(A,-1 + B,C,F,E,F) [A + -1*F >= 0         (?,1)
                                                             && -1*A + F >= 0           
                                                             && D + -1*E >= 0           
                                                             && -1*D + E >= 0           
                                                             && B + -1*C >= 0           
                                                             && -1*B + C >= 0           
                                                             && A >= 1                  
                                                             && C >= 1                  
                                                             && B = C                   
                                                             && D = E                   
                                                             && F = A]                  
          2. start(A,B,C,D,E,F)  -> lbl72(A,F,C,-1 + F,E,F) [A + -1*F >= 0         (?,1)
                                                             && -1*A + F >= 0           
                                                             && D + -1*E >= 0           
                                                             && -1*D + E >= 0           
                                                             && B + -1*C >= 0           
                                                             && -1*B + C >= 0           
                                                             && A >= 1                  
                                                             && 0 >= C                  
                                                             && B = C                   
                                                             && D = E                   
                                                             && F = A]                  
          3. lbl52(A,B,C,D,E,F)  -> lbl52(A,-1 + B,C,D,E,F) [A + -1*F >= 0         (?,1)
                                                             && -1 + F >= 0             
                                                             && -2 + D + F >= 0         
                                                             && -1*D + F >= 0           
                                                             && -1 + B + F >= 0         
                                                             && -2 + A + F >= 0         
                                                             && -1*A + F >= 0           
                                                             && A + -1*D >= 0           
                                                             && -1 + D >= 0             
                                                             && -1 + B + D >= 0         
                                                             && -2 + A + D >= 0         
                                                             && B >= 0                  
                                                             && -1 + A + B >= 0         
                                                             && -1 + A >= 0             
                                                             && D >= 1                  
                                                             && B >= 1                  
                                                             && A >= D                  
                                                             && F = A]                  
          4. lbl52(A,B,C,D,E,F)  -> lbl72(A,F,C,-1 + D,E,F) [A + -1*F >= 0         (?,1)
                                                             && -1 + F >= 0             
                                                             && -2 + D + F >= 0         
                                                             && -1*D + F >= 0           
                                                             && -1 + B + F >= 0         
                                                             && -2 + A + F >= 0         
                                                             && -1*A + F >= 0           
                                                             && A + -1*D >= 0           
                                                             && -1 + D >= 0             
                                                             && -1 + B + D >= 0         
                                                             && -2 + A + D >= 0         
                                                             && B >= 0                  
                                                             && -1 + A + B >= 0         
                                                             && -1 + A >= 0             
                                                             && D >= 1                  
                                                             && A >= D                  
                                                             && B = 0                   
                                                             && F = A]                  
          5. lbl72(A,B,C,D,E,F)  -> stop(A,B,C,D,E,F)       [B + -1*F >= 0         (?,1)
                                                             && A + -1*F >= 0           
                                                             && -1 + F >= 0             
                                                             && -1 + D + F >= 0         
                                                             && -1 + -1*D + F >= 0      
                                                             && -2 + B + F >= 0         
                                                             && -1*B + F >= 0           
                                                             && -2 + A + F >= 0         
                                                             && -1*A + F >= 0           
                                                             && -1 + B + -1*D >= 0      
                                                             && -1 + A + -1*D >= 0      
                                                             && D >= 0                  
                                                             && -1 + B + D >= 0         
                                                             && -1 + A + D >= 0         
                                                             && A + -1*B >= 0           
                                                             && -1 + B >= 0             
                                                             && -2 + A + B >= 0         
                                                             && -1*A + B >= 0           
                                                             && -1 + A >= 0             
                                                             && A >= 1                  
                                                             && D = 0                   
                                                             && F = A                   
                                                             && B = A]                  
          6. lbl72(A,B,C,D,E,F)  -> lbl52(A,-1 + B,C,D,E,F) [B + -1*F >= 0         (?,1)
                                                             && A + -1*F >= 0           
                                                             && -1 + F >= 0             
                                                             && -1 + D + F >= 0         
                                                             && -1 + -1*D + F >= 0      
                                                             && -2 + B + F >= 0         
                                                             && -1*B + F >= 0           
                                                             && -2 + A + F >= 0         
                                                             && -1*A + F >= 0           
                                                             && -1 + B + -1*D >= 0      
                                                             && -1 + A + -1*D >= 0      
                                                             && D >= 0                  
                                                             && -1 + B + D >= 0         
                                                             && -1 + A + D >= 0         
                                                             && A + -1*B >= 0           
                                                             && -1 + B >= 0             
                                                             && -2 + A + B >= 0         
                                                             && -1*A + B >= 0           
                                                             && -1 + A >= 0             
                                                             && D >= 1                  
                                                             && A >= 1                  
                                                             && A >= 1 + D              
                                                             && F = A                   
                                                             && B = A]                  
          7. start0(A,B,C,D,E,F) -> start(A,C,C,E,E,A)      True                   (1,1)
        Signature:
          {(lbl52,6);(lbl72,6);(start,6);(start0,6);(stop,6)}
        Flow Graph:
          [0->{},1->{3,4},2->{5,6},3->{3,4},4->{5,6},5->{},6->{3},7->{0,1,2}]
        
    + Applied Processor:
        FromIts
    + Details:
        ()
* Step 3: Decompose YES
    + Considered Problem:
        Rules:
          start(A,B,C,D,E,F)  -> stop(A,B,C,F,E,F)        [A + -1*F >= 0
                                                           && -1*A + F >= 0
                                                           && D + -1*E >= 0
                                                           && -1*D + E >= 0
                                                           && B + -1*C >= 0
                                                           && -1*B + C >= 0
                                                           && 0 >= A
                                                           && B = C
                                                           && D = E
                                                           && F = A]
          start(A,B,C,D,E,F)  -> lbl52(A,-1 + B,C,F,E,F)  [A + -1*F >= 0
                                                           && -1*A + F >= 0
                                                           && D + -1*E >= 0
                                                           && -1*D + E >= 0
                                                           && B + -1*C >= 0
                                                           && -1*B + C >= 0
                                                           && A >= 1
                                                           && C >= 1
                                                           && B = C
                                                           && D = E
                                                           && F = A]
          start(A,B,C,D,E,F)  -> lbl72(A,F,C,-1 + F,E,F)  [A + -1*F >= 0
                                                           && -1*A + F >= 0
                                                           && D + -1*E >= 0
                                                           && -1*D + E >= 0
                                                           && B + -1*C >= 0
                                                           && -1*B + C >= 0
                                                           && A >= 1
                                                           && 0 >= C
                                                           && B = C
                                                           && D = E
                                                           && F = A]
          lbl52(A,B,C,D,E,F)  -> lbl52(A,-1 + B,C,D,E,F)  [A + -1*F >= 0
                                                           && -1 + F >= 0
                                                           && -2 + D + F >= 0
                                                           && -1*D + F >= 0
                                                           && -1 + B + F >= 0
                                                           && -2 + A + F >= 0
                                                           && -1*A + F >= 0
                                                           && A + -1*D >= 0
                                                           && -1 + D >= 0
                                                           && -1 + B + D >= 0
                                                           && -2 + A + D >= 0
                                                           && B >= 0
                                                           && -1 + A + B >= 0
                                                           && -1 + A >= 0
                                                           && D >= 1
                                                           && B >= 1
                                                           && A >= D
                                                           && F = A]
          lbl52(A,B,C,D,E,F)  -> lbl72(A,F,C,-1 + D,E,F)  [A + -1*F >= 0
                                                           && -1 + F >= 0
                                                           && -2 + D + F >= 0
                                                           && -1*D + F >= 0
                                                           && -1 + B + F >= 0
                                                           && -2 + A + F >= 0
                                                           && -1*A + F >= 0
                                                           && A + -1*D >= 0
                                                           && -1 + D >= 0
                                                           && -1 + B + D >= 0
                                                           && -2 + A + D >= 0
                                                           && B >= 0
                                                           && -1 + A + B >= 0
                                                           && -1 + A >= 0
                                                           && D >= 1
                                                           && A >= D
                                                           && B = 0
                                                           && F = A]
          lbl72(A,B,C,D,E,F)  -> stop(A,B,C,D,E,F)        [B + -1*F >= 0
                                                           && A + -1*F >= 0
                                                           && -1 + F >= 0
                                                           && -1 + D + F >= 0
                                                           && -1 + -1*D + F >= 0
                                                           && -2 + B + F >= 0
                                                           && -1*B + F >= 0
                                                           && -2 + A + F >= 0
                                                           && -1*A + F >= 0
                                                           && -1 + B + -1*D >= 0
                                                           && -1 + A + -1*D >= 0
                                                           && D >= 0
                                                           && -1 + B + D >= 0
                                                           && -1 + A + D >= 0
                                                           && A + -1*B >= 0
                                                           && -1 + B >= 0
                                                           && -2 + A + B >= 0
                                                           && -1*A + B >= 0
                                                           && -1 + A >= 0
                                                           && A >= 1
                                                           && D = 0
                                                           && F = A
                                                           && B = A]
          lbl72(A,B,C,D,E,F)  -> lbl52(A,-1 + B,C,D,E,F)  [B + -1*F >= 0
                                                           && A + -1*F >= 0
                                                           && -1 + F >= 0
                                                           && -1 + D + F >= 0
                                                           && -1 + -1*D + F >= 0
                                                           && -2 + B + F >= 0
                                                           && -1*B + F >= 0
                                                           && -2 + A + F >= 0
                                                           && -1*A + F >= 0
                                                           && -1 + B + -1*D >= 0
                                                           && -1 + A + -1*D >= 0
                                                           && D >= 0
                                                           && -1 + B + D >= 0
                                                           && -1 + A + D >= 0
                                                           && A + -1*B >= 0
                                                           && -1 + B >= 0
                                                           && -2 + A + B >= 0
                                                           && -1*A + B >= 0
                                                           && -1 + A >= 0
                                                           && D >= 1
                                                           && A >= 1
                                                           && A >= 1 + D
                                                           && F = A
                                                           && B = A]
          start0(A,B,C,D,E,F) -> start(A,C,C,E,E,A)       True
        Signature:
          {(lbl52,6);(lbl72,6);(start,6);(start0,6);(stop,6)}
        Rule Graph:
          [0->{},1->{3,4},2->{5,6},3->{3,4},4->{5,6},5->{},6->{3},7->{0,1,2}]
    + Applied Processor:
        Decompose NoGreedy
    + Details:
        We construct a looptree:
          P: [0,1,2,3,4,5,6,7]
          |
          `- p:[3,6,4] c: [4,6]
             |
             `- p:[3] c: [3]
* Step 4: CloseWith YES
    + Considered Problem:
        (Rules:
          start(A,B,C,D,E,F)  -> stop(A,B,C,F,E,F)        [A + -1*F >= 0
                                                           && -1*A + F >= 0
                                                           && D + -1*E >= 0
                                                           && -1*D + E >= 0
                                                           && B + -1*C >= 0
                                                           && -1*B + C >= 0
                                                           && 0 >= A
                                                           && B = C
                                                           && D = E
                                                           && F = A]
          start(A,B,C,D,E,F)  -> lbl52(A,-1 + B,C,F,E,F)  [A + -1*F >= 0
                                                           && -1*A + F >= 0
                                                           && D + -1*E >= 0
                                                           && -1*D + E >= 0
                                                           && B + -1*C >= 0
                                                           && -1*B + C >= 0
                                                           && A >= 1
                                                           && C >= 1
                                                           && B = C
                                                           && D = E
                                                           && F = A]
          start(A,B,C,D,E,F)  -> lbl72(A,F,C,-1 + F,E,F)  [A + -1*F >= 0
                                                           && -1*A + F >= 0
                                                           && D + -1*E >= 0
                                                           && -1*D + E >= 0
                                                           && B + -1*C >= 0
                                                           && -1*B + C >= 0
                                                           && A >= 1
                                                           && 0 >= C
                                                           && B = C
                                                           && D = E
                                                           && F = A]
          lbl52(A,B,C,D,E,F)  -> lbl52(A,-1 + B,C,D,E,F)  [A + -1*F >= 0
                                                           && -1 + F >= 0
                                                           && -2 + D + F >= 0
                                                           && -1*D + F >= 0
                                                           && -1 + B + F >= 0
                                                           && -2 + A + F >= 0
                                                           && -1*A + F >= 0
                                                           && A + -1*D >= 0
                                                           && -1 + D >= 0
                                                           && -1 + B + D >= 0
                                                           && -2 + A + D >= 0
                                                           && B >= 0
                                                           && -1 + A + B >= 0
                                                           && -1 + A >= 0
                                                           && D >= 1
                                                           && B >= 1
                                                           && A >= D
                                                           && F = A]
          lbl52(A,B,C,D,E,F)  -> lbl72(A,F,C,-1 + D,E,F)  [A + -1*F >= 0
                                                           && -1 + F >= 0
                                                           && -2 + D + F >= 0
                                                           && -1*D + F >= 0
                                                           && -1 + B + F >= 0
                                                           && -2 + A + F >= 0
                                                           && -1*A + F >= 0
                                                           && A + -1*D >= 0
                                                           && -1 + D >= 0
                                                           && -1 + B + D >= 0
                                                           && -2 + A + D >= 0
                                                           && B >= 0
                                                           && -1 + A + B >= 0
                                                           && -1 + A >= 0
                                                           && D >= 1
                                                           && A >= D
                                                           && B = 0
                                                           && F = A]
          lbl72(A,B,C,D,E,F)  -> stop(A,B,C,D,E,F)        [B + -1*F >= 0
                                                           && A + -1*F >= 0
                                                           && -1 + F >= 0
                                                           && -1 + D + F >= 0
                                                           && -1 + -1*D + F >= 0
                                                           && -2 + B + F >= 0
                                                           && -1*B + F >= 0
                                                           && -2 + A + F >= 0
                                                           && -1*A + F >= 0
                                                           && -1 + B + -1*D >= 0
                                                           && -1 + A + -1*D >= 0
                                                           && D >= 0
                                                           && -1 + B + D >= 0
                                                           && -1 + A + D >= 0
                                                           && A + -1*B >= 0
                                                           && -1 + B >= 0
                                                           && -2 + A + B >= 0
                                                           && -1*A + B >= 0
                                                           && -1 + A >= 0
                                                           && A >= 1
                                                           && D = 0
                                                           && F = A
                                                           && B = A]
          lbl72(A,B,C,D,E,F)  -> lbl52(A,-1 + B,C,D,E,F)  [B + -1*F >= 0
                                                           && A + -1*F >= 0
                                                           && -1 + F >= 0
                                                           && -1 + D + F >= 0
                                                           && -1 + -1*D + F >= 0
                                                           && -2 + B + F >= 0
                                                           && -1*B + F >= 0
                                                           && -2 + A + F >= 0
                                                           && -1*A + F >= 0
                                                           && -1 + B + -1*D >= 0
                                                           && -1 + A + -1*D >= 0
                                                           && D >= 0
                                                           && -1 + B + D >= 0
                                                           && -1 + A + D >= 0
                                                           && A + -1*B >= 0
                                                           && -1 + B >= 0
                                                           && -2 + A + B >= 0
                                                           && -1*A + B >= 0
                                                           && -1 + A >= 0
                                                           && D >= 1
                                                           && A >= 1
                                                           && A >= 1 + D
                                                           && F = A
                                                           && B = A]
          start0(A,B,C,D,E,F) -> start(A,C,C,E,E,A)       True
        Signature:
          {(lbl52,6);(lbl72,6);(start,6);(start0,6);(stop,6)}
        Rule Graph:
          [0->{},1->{3,4},2->{5,6},3->{3,4},4->{5,6},5->{},6->{3},7->{0,1,2}]
        ,We construct a looptree:
          P: [0,1,2,3,4,5,6,7]
          |
          `- p:[3,6,4] c: [4,6]
             |
             `- p:[3] c: [3])
    + Applied Processor:
        CloseWith True
    + Details:
        ()

YES