My VM regularly 'freezes' despite being allocated it sufficient resources from the host while at the same time that host not being starved of resources.
Attached are the logs from a complete VM run and the output of the command kextstat | grep -v com.appl
$ kextstat | grep -v com.apple Index Refs Address Size Wired Name (Version) UUID <Linked Against> 96 3 0xffffff7f824dc000 0x63000 0x63000 org.virtualbox.kext.VBoxDrv (5.2.6) C32CCC8B-7E44-3974-BEC0-9C1FA570690D <7 5 4 3 1> 161 0 0xffffff7f85b06000 0x8000 0x8000 org.virtualbox.kext.VBoxUSB (5.2.6) A60E8437-734A-3C07-8488-5885145AEE0C <160 96 53 7 5 4 3 1> 163 0 0xffffff7f85b13000 0x5000 0x5000 org.virtualbox.kext.VBoxNetFlt (5.2.6) 552BD757-0D66-3F90-9A20-C6C7881F4A2F <96 7 5 4 3 1> 164 0 0xffffff7f85b18000 0x6000 0x6000 org.virtualbox.kext.VBoxNetAdp (5.2.6) 8B8163C1-1125-36B8-AC6A-1AA38506938D <96 5 4 1>