I was trying to use Boot Camp Assistant to create a Windows 10 partition, but it got stuck at partitioning. After about a hour, I gave up and force quit the Assistant, and discovered that 3 terabytes of disk space was missing (the amount I was partitioning for windows).

I tried to use Disk Utility to remove the partition, but it doesn't even show up on Disk Utility!

These are the results from diskutil cs list and diskutil list

These are screen shots of the Disk Utility program