WORST_CASE(?,O(n^1))
* Step 1: Ara WORST_CASE(?,O(n^1))
    + Considered Problem:
        - Strict TRS:
            a__f(X) -> f(X)
            a__f(f(a())) -> c(f(g(f(a()))))
            mark(a()) -> a()
            mark(c(X)) -> c(X)
            mark(f(X)) -> a__f(mark(X))
            mark(g(X)) -> g(mark(X))
        - Signature:
            {a__f/1,mark/1} / {a/0,c/1,f/1,g/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {a__f,mark} and constructors {a,c,f,g}
    + Applied Processor:
        Ara {heuristics_ = NoHeuristics, minDegree = 1, maxDegree = 3, araTimeout = 60, araFindStrictRules = Nothing, araSmtSolver = Z3}
    + Details:
        Signatures used:
        ----------------
          a :: [] -(0)-> A(3)
          a :: [] -(0)-> A(15)
          a :: [] -(0)-> A(13)
          a :: [] -(0)-> A(5)
          a__f :: [A(3)] -(4)-> A(3)
          c :: [A(0)] -(0)-> A(15)
          c :: [A(0)] -(0)-> A(9)
          f :: [A(3)] -(3)-> A(3)
          f :: [A(15)] -(15)-> A(15)
          f :: [A(0)] -(0)-> A(0)
          g :: [A(15)] -(15)-> A(15)
          g :: [A(0)] -(0)-> A(0)
          g :: [A(3)] -(3)-> A(3)
          mark :: [A(15)] -(9)-> A(3)
        
        
        Cost-free Signatures used:
        --------------------------
          a :: [] -(0)-> A_cf(0)
          a__f :: [A_cf(0)] -(0)-> A_cf(0)
          c :: [A_cf(0)] -(0)-> A_cf(0)
          f :: [A_cf(0)] -(0)-> A_cf(0)
          g :: [A_cf(0)] -(0)-> A_cf(0)
          mark :: [A_cf(0)] -(0)-> A_cf(0)
        
        
        Base Constructor Signatures used:
        ---------------------------------
          a_A :: [] -(0)-> A(1)
          c_A :: [A(0)] -(0)-> A(1)
          f_A :: [A(1)] -(1)-> A(1)
          g_A :: [A(1)] -(1)-> A(1)
        
* Step 2: Open MAYBE
    - Strict TRS:
        a__f(X) -> f(X)
        a__f(f(a())) -> c(f(g(f(a()))))
        mark(a()) -> a()
        mark(c(X)) -> c(X)
        mark(f(X)) -> a__f(mark(X))
        mark(g(X)) -> g(mark(X))
    - Signature:
        {a__f/1,mark/1} / {a/0,c/1,f/1,g/1}
    - Obligation:
        innermost runtime complexity wrt. defined symbols {a__f,mark} and constructors {a,c,f,g}
Following problems could not be solved:
  - Strict TRS:
      a__f(X) -> f(X)
      a__f(f(a())) -> c(f(g(f(a()))))
      mark(a()) -> a()
      mark(c(X)) -> c(X)
      mark(f(X)) -> a__f(mark(X))
      mark(g(X)) -> g(mark(X))
  - Signature:
      {a__f/1,mark/1} / {a/0,c/1,f/1,g/1}
  - Obligation:
      innermost runtime complexity wrt. defined symbols {a__f,mark} and constructors {a,c,f,g}
WORST_CASE(?,O(n^1))