WORST_CASE(?,O(n^1))
* Step 1: Ara WORST_CASE(?,O(n^1))
    + Considered Problem:
        - Strict TRS:
            add(0(),X) -> X
            add(s(),Y) -> s()
            dbl(0()) -> 0()
            dbl(s()) -> s()
            first(0(),X) -> nil()
            first(s(),cons(Y)) -> cons(Y)
            sqr(0()) -> 0()
            sqr(s()) -> s()
            terms(N) -> cons(recip(sqr(N)))
        - Signature:
            {add/2,dbl/1,first/2,sqr/1,terms/1} / {0/0,cons/1,nil/0,recip/1,s/0}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {add,dbl,first,sqr,terms} and constructors {0,cons,nil
            ,recip,s}
    + Applied Processor:
        Ara {heuristics_ = NoHeuristics, minDegree = 1, maxDegree = 3, araTimeout = 60, araFindStrictRules = Nothing, araSmtSolver = Z3}
    + Details:
        Signatures used:
        ----------------
          0 :: [] -(0)-> A(0)
          0 :: [] -(0)-> A(14)
          0 :: [] -(0)-> A(15)
          add :: [A(0) x A(12)] -(9)-> A(0)
          cons :: [A(0)] -(0)-> A(0)
          cons :: [A(0)] -(0)-> A(12)
          cons :: [A(0)] -(0)-> A(6)
          dbl :: [A(0)] -(16)-> A(0)
          first :: [A(0) x A(0)] -(8)-> A(1)
          nil :: [] -(0)-> A(1)
          recip :: [A(12)] -(0)-> A(12)
          s :: [] -(0)-> A(0)
          s :: [] -(0)-> A(14)
          s :: [] -(0)-> A(4)
          sqr :: [A(0)] -(3)-> A(13)
          terms :: [A(14)] -(14)-> A(0)
        
        
        Cost-free Signatures used:
        --------------------------
        
        
        
        Base Constructor Signatures used:
        ---------------------------------
          0_A :: [] -(0)-> A(1)
          cons_A :: [A(0)] -(0)-> A(1)
          nil_A :: [] -(0)-> A(1)
          recip_A :: [A(1)] -(0)-> A(1)
          s_A :: [] -(0)-> A(1)
        
* Step 2: Open MAYBE
    - Strict TRS:
        add(0(),X) -> X
        add(s(),Y) -> s()
        dbl(0()) -> 0()
        dbl(s()) -> s()
        first(0(),X) -> nil()
        first(s(),cons(Y)) -> cons(Y)
        sqr(0()) -> 0()
        sqr(s()) -> s()
        terms(N) -> cons(recip(sqr(N)))
    - Signature:
        {add/2,dbl/1,first/2,sqr/1,terms/1} / {0/0,cons/1,nil/0,recip/1,s/0}
    - Obligation:
        innermost runtime complexity wrt. defined symbols {add,dbl,first,sqr,terms} and constructors {0,cons,nil
        ,recip,s}
Following problems could not be solved:
  - Strict TRS:
      add(0(),X) -> X
      add(s(),Y) -> s()
      dbl(0()) -> 0()
      dbl(s()) -> s()
      first(0(),X) -> nil()
      first(s(),cons(Y)) -> cons(Y)
      sqr(0()) -> 0()
      sqr(s()) -> s()
      terms(N) -> cons(recip(sqr(N)))
  - Signature:
      {add/2,dbl/1,first/2,sqr/1,terms/1} / {0/0,cons/1,nil/0,recip/1,s/0}
  - Obligation:
      innermost runtime complexity wrt. defined symbols {add,dbl,first,sqr,terms} and constructors {0,cons,nil
      ,recip,s}
WORST_CASE(?,O(n^1))