When to click the 'Cancel' button on a study?

I am running a study right now, it has been stuck at 27.3% for about 45 minutes now. The current tack is: Solving contact constraints, which has been at 29% for about 45 minutes.

I clicked on the Convergence Plot. It shows that it reaches the Stopping Threshold and then appears to restart.

Am I stuck in some sort of infinte loop?

SolidworksSimulation