How to check the appian product license expiry date

I am getting k3.lic as the output when I run k.exe under <APPIAN_Home>/server/_bin/k/linux64. I know that it indicates that the license is invalid and it might have been expired. But there are other factors which can make a license invalid.

The license for this environment is invalid for at least one of the following reasons:

1. There was a change in the operating system.
2. There was a change in the CPU count.
3. The FQDN was changed.
4. The license expired.
5. More than one hostname resolves to the local network IP of the machine where this license is installed

So I want to know that if the license expiry is the reason in my case. How can I check the expiry date for the license?