MAYBE
MAYBE
TRS:
 {
               app(app(app(comp(), f), g), x) -> app(f, app(g, x)),
                    app(app(map(), f), nil()) -> nil(),
  app(app(map(), f), app(app(cons(), x), xs)) ->
  app(app(cons(), app(f, x)), app(app(map(), f), xs)),
                              app(twice(), f) -> app(app(comp(), f), f)
 }
 DUP: We consider a duplicating system.
  Trs:
   {
                 app(app(app(comp(), f), g), x) -> app(f, app(g, x)),
                      app(app(map(), f), nil()) -> nil(),
    app(app(map(), f), app(app(cons(), x), xs)) ->
    app(app(cons(), app(f, x)), app(app(map(), f), xs)),
                                app(twice(), f) -> app(app(comp(), f), f)
   }
  Fail