Hi Anainar,
Have done two times this route recently in my WagonR and it took me 11 hours with some breaks. It is extremely dangerous to drive in the night as there is road widening work going on and there lot of truck activity, and one more the Volvo buses.
I have encountered the following things enroute:
The road between Ananthapur and Karnool is really good and you can finish this distance very fast. Road between Hyderabad and karnool is a bit dangerous, needs to be very careful.
I have observed lot of stones of varied sizes
on the road which caused my car's left front rim bend and disalignment. Had to align at Ananthapuram.
You will find all of a sudden big potholes in the middle of the road, becareful.
You can take your breakfast/lunch at Reliance A1 Plaza near gooty; you can find two of them.
No need for you to stay at Karnool. You can aaraaam se complete the trip in 10 hours. Start early 4am and you will reach Hyderabad by 2 o clock.