Just wanted to update this topic after Softimage Support got back to me just in case anyone stumbles across the same issue in the future. Here's the official response:
" Hi Mitchell, Thanks a lot for being able to send in a scene for our investigation. I have investigated the crash and found it to be a known issue where using states with a Simulate Bullet Rigid Bodies node will cause a crash. You may also wish to note that the crash has already been fixed in Softimage 2013 SP1. "
