Their aim shouldn't be getting ahead of Arsenal but finishing in a better position and they're currently in 3rd place despite losing today to Aston Villa it's a good position though but they have to maintain it, losing to Villa today have exposed their weakness to other teams they have to play against so they’ll need to do better and cover their tracks ahead of next match, they're lucky that they're gaping Chelsea with many points so the lose won't really affect them much. Anyways ì don't think anything can stop Liverpool from winning this season's title except they commit an offence that would warrant deduction of points or demotion to the Championship League but that's not likely to happen and I believe they'll win their next match and more to come, Arsenal can try again next season.