i am trying to unwrapped the phase on VMware … it seems a never
ending process… it shows treesize 33876567 , pivots 1376897546,
improvements 11567898… what does these term means… is there any
way to know how much time it takes…

unfortunately, you can’t guess it from the numbers displayed.
Try to perform the unwrapping on a small subset first in order to see if if works correctly and then increase the subset continually.

My experience is that there is kind of a threshold in image size and terrain complexity. Below, unwrapping takes a couple of minutes or a few hours. Above it seems to run infinitely.
So an image with the double size doesn’t necessarily take the double time.