NO
* Step 1: FromIts NO
    + Considered Problem:
        Rules:
          0. f2(A,B,C,D) -> f2(1 + A,1 + B,-1 + C,D) True                             (?,1)
          1. f1(A,B,C,D) -> f2(A,B,C,D)              [A >= C && B >= A && C >= B]     (1,1)
          2. f1(A,B,C,D) -> f300(A,B,C,E)            [C >= 1 + A && B >= A && C >= B] (1,1)
          3. f1(A,B,C,D) -> f300(A,B,C,E)            [B >= A && B >= 1 + C]           (1,1)
          4. f1(A,B,C,D) -> f300(A,B,C,E)            [A >= 1 + B]                     (1,1)
        Signature:
          {(f1,4);(f2,4);(f300,4)}
        Flow Graph:
          [0->{0},1->{0},2->{},3->{},4->{}]
        
    + Applied Processor:
        FromIts
    + Details:
        ()
* Step 2: CloseWith NO
    + Considered Problem:
        Rules:
          f2(A,B,C,D) -> f2(1 + A,1 + B,-1 + C,D)  True
          f1(A,B,C,D) -> f2(A,B,C,D)               [A >= C && B >= A && C >= B]
          f1(A,B,C,D) -> f300(A,B,C,E)             [C >= 1 + A && B >= A && C >= B]
          f1(A,B,C,D) -> f300(A,B,C,E)             [B >= A && B >= 1 + C]
          f1(A,B,C,D) -> f300(A,B,C,E)             [A >= 1 + B]
        Signature:
          {(f1,4);(f2,4);(f300,4)}
        Rule Graph:
          [0->{0},1->{0},2->{},3->{},4->{}]
    + Applied Processor:
        CloseWith False
    + Details:
        ()

NO