Oh, FFS
Oh FFS. In a war territory is always captured by both sides, and then bargained for. It is the totality at the end of the war itself that matters. India and Pak have taken chunks of territory in individual battles. By that logic, India has even taken Lahore:
Status quo pro bellum is what matters. ie, what was the territorial change at the end of the war. The answer is that Pak lost half its country. Gaining one inch and losing one mile is not considered gaining, it is called losing.
When India captured Siachen and Saltoro, there was no equivalent capture by Pakistan. It was one sided.
Pakistan has tried since 1965 to take Kashmir from India, and never gained an inch. It has stopped trying since 1999. Now all it can do is "deplore" and cry in front of the world, and here on PDF. Keep it up.