Been reading that series up to the latest translation and by the look of the pace of the animation is going at. It most likely to cover either up to Volume 4 to Volume 7, depending on how fast they want to pace it. I believe by the time it reaches Volume 4, it should have released approximately around 13 to 16 episodes if they paced it based on all the key events in the Light Novel.
Additional Note: Volume 1 is already worth 4 Episodes so far. Episode 5 will cover last bit of Volume 1 and go on to Volume 2.