Non-infinate loop mechanics forcing game to end in a draw.

I played "Raise the past" with about 15 2 mana cards in my graveyard including 4 "Hinterland Sanctifiier", 3 "Ajani's Pridemate" and 2 "Skyknight Squire" (i got force milled alot). When they entered the life gain, counter gain based on life gain, and counter gain based on creature entering triggers for each card fired. After about 30 interaction i was prompted to do something to stop the loop otherwise the game would end in a draw (although the volume was finite and there was nothing i could do to change/stop the loop). This was the point of the deck and i don't see why it got stopped for that reason. Please resolve as i don't see why this would force a game to draw