/vsm/license_violation_log is a non-documented configuration variable that controls where license violations are written. It's default value is /var/lib/vsm/license.messages.
The documentation currently states the following:
> ThinLinc logs user license violations to the ﬁle /var/log/thinlinc-user-
> licenses. Other license-related messages are logged to /var/log/vsmserver.log.
However, we log license violations to /var/lib/vsm/license.messages, license usage to /var/log/thinlinc-user-licenses, and both violations and usage to /var/log/vsmserver.log.