WORST_CASE(?,O(n^1))
* Step 1: Ara WORST_CASE(?,O(n^1))
    + Considered Problem:
        - Strict TRS:
            merge(x,nil()) -> x
            merge(++(x,y),++(u(),v())) -> ++(x,merge(y,++(u(),v())))
            merge(++(x,y),++(u(),v())) -> ++(u(),merge(++(x,y),v()))
            merge(nil(),y) -> y
        - Signature:
            {merge/2} / {++/2,nil/0,u/0,v/0}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {merge} and constructors {++,nil,u,v}
    + Applied Processor:
        Ara {heuristics_ = NoHeuristics, minDegree = 1, maxDegree = 3, araTimeout = 60, araFindStrictRules = Nothing, araSmtSolver = Z3}
    + Details:
        Signatures used:
        ----------------
          ++ :: [A(2) x A(2)] -(2)-> A(2)
          ++ :: [A(7) x A(7)] -(7)-> A(7)
          ++ :: [A(0) x A(0)] -(0)-> A(0)
          merge :: [A(2) x A(7)] -(8)-> A(0)
          nil :: [] -(0)-> A(7)
          nil :: [] -(0)-> A(2)
          u :: [] -(0)-> A(7)
          u :: [] -(0)-> A(15)
          u :: [] -(0)-> A(13)
          v :: [] -(0)-> A(7)
          v :: [] -(0)-> A(15)
          v :: [] -(0)-> A(13)
        
        
        Cost-free Signatures used:
        --------------------------
          ++ :: [A_cf(0) x A_cf(0)] -(0)-> A_cf(0)
          merge :: [A_cf(0) x A_cf(0)] -(0)-> A_cf(0)
          nil :: [] -(0)-> A_cf(0)
          u :: [] -(0)-> A_cf(0)
          v :: [] -(0)-> A_cf(0)
        
        
        Base Constructor Signatures used:
        ---------------------------------
          ++_A :: [A(0) x A(0)] -(0)-> A(0)
          nil_A :: [] -(0)-> A(1)
          u_A :: [] -(0)-> A(1)
          v_A :: [] -(0)-> A(1)
        
* Step 2: Open MAYBE
    - Strict TRS:
        merge(x,nil()) -> x
        merge(++(x,y),++(u(),v())) -> ++(x,merge(y,++(u(),v())))
        merge(++(x,y),++(u(),v())) -> ++(u(),merge(++(x,y),v()))
        merge(nil(),y) -> y
    - Signature:
        {merge/2} / {++/2,nil/0,u/0,v/0}
    - Obligation:
        innermost runtime complexity wrt. defined symbols {merge} and constructors {++,nil,u,v}
Following problems could not be solved:
  - Strict TRS:
      merge(x,nil()) -> x
      merge(++(x,y),++(u(),v())) -> ++(x,merge(y,++(u(),v())))
      merge(++(x,y),++(u(),v())) -> ++(u(),merge(++(x,y),v()))
      merge(nil(),y) -> y
  - Signature:
      {merge/2} / {++/2,nil/0,u/0,v/0}
  - Obligation:
      innermost runtime complexity wrt. defined symbols {merge} and constructors {++,nil,u,v}
WORST_CASE(?,O(n^1))