MAYBE
* Step 1: UnsatPaths MAYBE
    + Considered Problem:
        Rules:
          0. f4(A,B) -> f11(A,B) [A >= B]                   (?,1)
          1. f4(A,B) -> f4(A,E)  [B >= 1 + A]               (?,1)
          2. f4(A,B) -> f4(E,B)  [B >= 1 + A && C >= 1 + D] (?,1)
          3. f0(A,B) -> f4(0,99) True                       (1,1)
        Signature:
          {(f0,2);(f11,2);(f4,2)}
        Flow Graph:
          [0->{},1->{0,1,2},2->{0,1,2},3->{0,1,2}]
        
    + Applied Processor:
        UnsatPaths
    + Details:
        We remove following edges from the transition graph: [(3,0)]
* Step 2: FromIts MAYBE
    + Considered Problem:
        Rules:
          0. f4(A,B) -> f11(A,B) [A >= B]                   (?,1)
          1. f4(A,B) -> f4(A,E)  [B >= 1 + A]               (?,1)
          2. f4(A,B) -> f4(E,B)  [B >= 1 + A && C >= 1 + D] (?,1)
          3. f0(A,B) -> f4(0,99) True                       (1,1)
        Signature:
          {(f0,2);(f11,2);(f4,2)}
        Flow Graph:
          [0->{},1->{0,1,2},2->{0,1,2},3->{1,2}]
        
    + Applied Processor:
        FromIts
    + Details:
        ()
* Step 3: AddSinks MAYBE
    + Considered Problem:
        Rules:
          f4(A,B) -> f11(A,B)  [A >= B]
          f4(A,B) -> f4(A,E)   [B >= 1 + A]
          f4(A,B) -> f4(E,B)   [B >= 1 + A && C >= 1 + D]
          f0(A,B) -> f4(0,99)  True
        Signature:
          {(f0,2);(f11,2);(f4,2)}
        Rule Graph:
          [0->{},1->{0,1,2},2->{0,1,2},3->{1,2}]
    + Applied Processor:
        AddSinks
    + Details:
        ()
* Step 4: Failure MAYBE
  + Considered Problem:
      Rules:
        f4(A,B)  -> f11(A,B)        [A >= B]
        f4(A,B)  -> f4(A,E)         [B >= 1 + A]
        f4(A,B)  -> f4(E,B)         [B >= 1 + A && C >= 1 + D]
        f0(A,B)  -> f4(0,99)        True
        f11(A,B) -> exitus616(A,B)  True
      Signature:
        {(exitus616,2);(f0,2);(f11,2);(f4,2)}
      Rule Graph:
        [0->{4},1->{0,1,2},2->{0,1,2},3->{1,2}]
  + Applied Processor:
      Decompose Greedy
  + Details:
      We construct a looptree:
        P: [0,1,2,3,4]
        |
        `- p:[1,2] c: []
MAYBE