VirtualBox/Vagrant Fully Remove Virtual Machine to Clear Hash Sum Mismatches, etc
Mavericks has left me in tears, over a similar issue.

I upgraded to Mavs using appstore and, it went fine for a couple of weeks.

I think that the problem occured after I upgraded to the latest Virtualbox (I know nothing of Vagrant, Precise32, and I don't want to).

There came an occasion when I couldn't  VBoxManage - restart. It shut down the VM but, would not and cannot restart the VM.

Right now, I'm trying to work out a way to brute force Mountain Lion to install over Mavericks. I'm completely out of other ideas, apart from to get a tattoo that reads, 'Don't upgrade, just because it's there - it will only cause you to cry in your beer'.