Atalanta still has two matches left, while AS Roma has only one match left and also, Atalanta has a higher number of goals compared to AS Roma. Therefore, even if for example at the end of the season, Atalanta and AS Roma have the same points then still, AS Roma will not be able to overtake Atalanta. But anyway, because Atalanta has two matches remaining then of course Atalanta will still have higher points compared to AS Roma. With this factor, then of course there is no more chance for AS Roma to be able to finish in the Champion League zone and of course, AS Roma only accept a Europa League ticket because AS Roma still failed to finish in the Champion League zone.
I agree that Roma has almost no chance of overtaking Atalanta again. Because the problem is that from the number of goals that Atalanta alone has, it is no longer possible for Roma to catch them. If Atalanta fails in the last two matches and Roma wins in the last match then Roma will still be ranked 6th and Atalanta will still be ranked 5th. Unless Roma scores more than 8 goals in one match and that is unlikely to happen. Because Atalanta lost the last two matches it is also very difficult to happen. In fact, I predict that Atalanta will still win in the last two matches they will face.
But in the match against Torino, Atalanta might still be in less than optimal condition. because it was 3 days after the European League final match. And Atalanta probably won't have enough time to rest. So against Torino, Atalanta might just share the points. And maybe Atalanta will add full points again in the last match against Fiorentina.