MAYBE
* Step 1: NaturalPI MAYBE
    + Considered Problem:
        - Strict TRS:
            badd(x,Nil()) -> x
            badd(x',Cons(x,xs)) -> badd(Cons(Nil(),Nil()),badd(x',xs))
            goal(x,y) -> badd(x,y)
        - Signature:
            {badd/2,goal/2} / {Cons/2,Nil/0}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {badd,goal} and constructors {Cons,Nil}
    + Applied Processor:
        NaturalPI {shape = Mixed 2, restrict = Restrict, uargs = UArgs, urules = URules, selector = Just any strict-rules}
    + Details:
        We apply a polynomial interpretation of kind constructor-based(mixed(2)):
        The following argument positions are considered usable:
          uargs(badd) = {2}
        
        Following symbols are considered usable:
          {badd,goal}
        TcT has computed the following interpretation:
          p(Cons) = x2                           
           p(Nil) = 0                            
          p(badd) = x1 + x2                      
          p(goal) = 2 + 2*x1 + x1^2 + x2 + 7*x2^2
        
        Following rules are strictly oriented:
        goal(x,y) = 2 + 2*x + x^2 + y + 7*y^2
                  > x + y                    
                  = badd(x,y)                
        
        
        Following rules are (at-least) weakly oriented:
              badd(x,Nil()) =  x                                  
                            >= x                                  
                            =  x                                  
        
        badd(x',Cons(x,xs)) =  x' + xs                            
                            >= x' + xs                            
                            =  badd(Cons(Nil(),Nil()),badd(x',xs))
        
* Step 2: Failure MAYBE
  + Considered Problem:
      - Strict TRS:
          badd(x,Nil()) -> x
          badd(x',Cons(x,xs)) -> badd(Cons(Nil(),Nil()),badd(x',xs))
      - Weak TRS:
          goal(x,y) -> badd(x,y)
      - Signature:
          {badd/2,goal/2} / {Cons/2,Nil/0}
      - Obligation:
          innermost runtime complexity wrt. defined symbols {badd,goal} and constructors {Cons,Nil}
  + Applied Processor:
      EmptyProcessor
  + Details:
      The problem is still open.
MAYBE