YES(?,O(n^1))
* Step 1: TrivialSCCs WORST_CASE(?,O(n^1))
    + Considered Problem:
        Rules:
          0. f300(A,B,C) -> f300(-1 + A,-2 + A,C) [A >= 1 && A + B >= 1 && B >= 1] (?,1)
          1. f300(A,B,C) -> f1(A,B,D)             [A >= 1 && 0 >= A + B && B >= 1] (?,1)
          2. f300(A,B,C) -> f1(A,B,D)             [B >= 1 && 0 >= A]               (?,1)
          3. f300(A,B,C) -> f1(A,B,D)             [0 >= B]                         (?,1)
          4. f2(A,B,C)   -> f300(A,B,C)           True                             (1,1)
        Signature:
          {(f1,3);(f2,3);(f300,3)}
        Flow Graph:
          [0->{0,1,2,3},1->{},2->{},3->{},4->{0,1,2,3}]
        
    + Applied Processor:
        TrivialSCCs
    + Details:
        All trivial SCCs of the transition graph admit timebound 1.
* Step 2: UnsatPaths WORST_CASE(?,O(n^1))
    + Considered Problem:
        Rules:
          0. f300(A,B,C) -> f300(-1 + A,-2 + A,C) [A >= 1 && A + B >= 1 && B >= 1] (?,1)
          1. f300(A,B,C) -> f1(A,B,D)             [A >= 1 && 0 >= A + B && B >= 1] (1,1)
          2. f300(A,B,C) -> f1(A,B,D)             [B >= 1 && 0 >= A]               (1,1)
          3. f300(A,B,C) -> f1(A,B,D)             [0 >= B]                         (1,1)
          4. f2(A,B,C)   -> f300(A,B,C)           True                             (1,1)
        Signature:
          {(f1,3);(f2,3);(f300,3)}
        Flow Graph:
          [0->{0,1,2,3},1->{},2->{},3->{},4->{0,1,2,3}]
        
    + Applied Processor:
        UnsatPaths
    + Details:
        We remove following edges from the transition graph: [(0,1),(0,2),(4,1)]
* Step 3: UnreachableRules WORST_CASE(?,O(n^1))
    + Considered Problem:
        Rules:
          0. f300(A,B,C) -> f300(-1 + A,-2 + A,C) [A >= 1 && A + B >= 1 && B >= 1] (?,1)
          1. f300(A,B,C) -> f1(A,B,D)             [A >= 1 && 0 >= A + B && B >= 1] (1,1)
          2. f300(A,B,C) -> f1(A,B,D)             [B >= 1 && 0 >= A]               (1,1)
          3. f300(A,B,C) -> f1(A,B,D)             [0 >= B]                         (1,1)
          4. f2(A,B,C)   -> f300(A,B,C)           True                             (1,1)
        Signature:
          {(f1,3);(f2,3);(f300,3)}
        Flow Graph:
          [0->{0,3},1->{},2->{},3->{},4->{0,2,3}]
        
    + Applied Processor:
        UnreachableRules
    + Details:
        Following transitions are not reachable from the starting states and are revomed: [1]
* Step 4: AddSinks WORST_CASE(?,O(n^1))
    + Considered Problem:
        Rules:
          0. f300(A,B,C) -> f300(-1 + A,-2 + A,C) [A >= 1 && A + B >= 1 && B >= 1] (?,1)
          2. f300(A,B,C) -> f1(A,B,D)             [B >= 1 && 0 >= A]               (1,1)
          3. f300(A,B,C) -> f1(A,B,D)             [0 >= B]                         (1,1)
          4. f2(A,B,C)   -> f300(A,B,C)           True                             (1,1)
        Signature:
          {(f1,3);(f2,3);(f300,3)}
        Flow Graph:
          [0->{0,3},2->{},3->{},4->{0,2,3}]
        
    + Applied Processor:
        AddSinks
    + Details:
        ()
* Step 5: UnsatPaths WORST_CASE(?,O(n^1))
    + Considered Problem:
        Rules:
          0. f300(A,B,C) -> f300(-1 + A,-2 + A,C) [A >= 1 && A + B >= 1 && B >= 1] (?,1)
          2. f300(A,B,C) -> f1(A,B,D)             [B >= 1 && 0 >= A]               (?,1)
          3. f300(A,B,C) -> f1(A,B,D)             [0 >= B]                         (?,1)
          4. f2(A,B,C)   -> f300(A,B,C)           True                             (1,1)
          5. f300(A,B,C) -> exitus616(A,B,C)      True                             (?,1)
        Signature:
          {(exitus616,3);(f1,3);(f2,3);(f300,3)}
        Flow Graph:
          [0->{0,2,3,5},2->{},3->{},4->{0,2,3,5},5->{}]
        
    + Applied Processor:
        UnsatPaths
    + Details:
        We remove following edges from the transition graph: [(0,2)]
* Step 6: LooptreeTransformer WORST_CASE(?,O(n^1))
    + Considered Problem:
        Rules:
          0. f300(A,B,C) -> f300(-1 + A,-2 + A,C) [A >= 1 && A + B >= 1 && B >= 1] (?,1)
          2. f300(A,B,C) -> f1(A,B,D)             [B >= 1 && 0 >= A]               (?,1)
          3. f300(A,B,C) -> f1(A,B,D)             [0 >= B]                         (?,1)
          4. f2(A,B,C)   -> f300(A,B,C)           True                             (1,1)
          5. f300(A,B,C) -> exitus616(A,B,C)      True                             (?,1)
        Signature:
          {(exitus616,3);(f1,3);(f2,3);(f300,3)}
        Flow Graph:
          [0->{0,3,5},2->{},3->{},4->{0,2,3,5},5->{}]
        
    + Applied Processor:
        LooptreeTransformer
    + Details:
        We construct a looptree:
          P: [0,2,3,4,5]
          |
          `- p:[0] c: [0]
* Step 7: SizeAbstraction WORST_CASE(?,O(n^1))
    + Considered Problem:
        (Rules:
          0. f300(A,B,C) -> f300(-1 + A,-2 + A,C) [A >= 1 && A + B >= 1 && B >= 1] (?,1)
          2. f300(A,B,C) -> f1(A,B,D)             [B >= 1 && 0 >= A]               (?,1)
          3. f300(A,B,C) -> f1(A,B,D)             [0 >= B]                         (?,1)
          4. f2(A,B,C)   -> f300(A,B,C)           True                             (1,1)
          5. f300(A,B,C) -> exitus616(A,B,C)      True                             (?,1)
        Signature:
          {(exitus616,3);(f1,3);(f2,3);(f300,3)}
        Flow Graph:
          [0->{0,3,5},2->{},3->{},4->{0,2,3,5},5->{}]
        
        ,We construct a looptree:
          P: [0,2,3,4,5]
          |
          `- p:[0] c: [0])
    + Applied Processor:
        SizeAbstraction UseCFG Minimize
    + Details:
        ()
* Step 8: FlowAbstraction WORST_CASE(?,O(n^1))
    + Considered Problem:
        Program:
          Domain: [A,B,C,0.0]
           f300  ~>  f300        [A <= A, B <= A, C <= C]
           f300  ~>  f1          [A <= A, B <= B, C <= unknown]
           f300  ~>  f1          [A <= A, B <= B, C <= unknown]
           f2    ~>  f300        [A <= A, B <= B, C <= C]
           f300  ~>  exitus616   [A <= A, B <= B, C <= C]
          + Loop: [0.0 <= A]
               f300  ~>  f300   [A <= A, B <= A, C <= C]
    + Applied Processor:
        FlowAbstraction
    + Details:
        ()
* Step 9: LareProcessor WORST_CASE(?,O(n^1))
    + Considered Problem:
        Program:
          Domain: [tick,huge,K,A,B,C,0.0]
           f300  ~>  f300        [A ~=> B]
           f300  ~>  f1          [huge ~=> C]
           f300  ~>  f1          [huge ~=> C]
           f2    ~>  f300        []
           f300  ~>  exitus616   []
          + Loop: [A ~=> 0.0]
               f300  ~>  f300   [A ~=> B]
    + Applied Processor:
        LareProcessor
    + Details:
         f2  ~>  exitus616   [A ~=> B,A ~=> 0.0,A ~+> tick,tick ~+> tick]
         f2  ~>  f1          [A ~=> B,A ~=> 0.0,huge ~=> C,A ~+> tick,tick ~+> tick]
        + <f300  ~>  f300>  [A ~=> B,A ~=> 0.0,A ~+> tick,tick ~+> tick]

YES(?,O(n^1))