WORST_CASE(?,O(n^2))
* Step 1: NaturalPI WORST_CASE(?,O(n^2))
    + Considered Problem:
        - Strict TRS:
            f(a()) -> b()
            f(c()) -> d()
            f(g(x,y)) -> g(f(x),f(y))
            f(h(x,y)) -> g(h(y,f(x)),h(x,f(y)))
            g(x,x) -> h(e(),x)
        - Signature:
            {f/1,g/2} / {a/0,b/0,c/0,d/0,e/0,h/2}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {f,g} and constructors {a,b,c,d,e,h}
    + Applied Processor:
        NaturalPI {shape = Quadratic, restrict = NoRestrict, uargs = UArgs, urules = URules, selector = Nothing}
    + Details:
        We apply a polynomial interpretation of kind constructor-based(quadratic):
        The following argument positions are considered usable:
          uargs(g) = {1,2},
          uargs(h) = {2}
        
        Following symbols are considered usable:
          {f,g}
        TcT has computed the following interpretation:
          p(a) = 3          
          p(b) = 6          
          p(c) = 3          
          p(d) = 4          
          p(e) = 0          
          p(f) = 2*x1 + x1^2
          p(g) = 3 + x1 + x2
          p(h) = 2 + x1 + x2
        
        Following rules are strictly oriented:
           f(a()) = 15                                
                  > 6                                 
                  = b()                               
        
           f(c()) = 15                                
                  > 4                                 
                  = d()                               
        
        f(g(x,y)) = 15 + 8*x + 2*x*y + x^2 + 8*y + y^2
                  > 3 + 2*x + x^2 + 2*y + y^2         
                  = g(f(x),f(y))                      
        
        f(h(x,y)) = 8 + 6*x + 2*x*y + x^2 + 6*y + y^2 
                  > 7 + 3*x + x^2 + 3*y + y^2         
                  = g(h(y,f(x)),h(x,f(y)))            
        
           g(x,x) = 3 + 2*x                           
                  > 2 + x                             
                  = h(e(),x)                          
        
        
        Following rules are (at-least) weakly oriented:
        

WORST_CASE(?,O(n^2))