The queries (i.e. the system requirements) are verified from the verifier interface of UPPAAL. A verification is always performed according to the settings specified in the Options menu of the main menu bar.
The selected queries are verified when the button named Check is pressed. The verification progress dialog displays the progress of how many queries have been verified, what is the current load of a passed-waiting list, current processor time usage (the time spent for verification is in blue, the time spent by operating system is in red), current usage of host's random access memory (verification memory is in blue, memory used by other running processes is in gray and operating system cache and buffers are in yellow), swap disk usage (swapped out verification is in blue, other is in grey). Note that resource figures do not include the overhead of UPPAAL GUI and command line utilities (like memtime run on verifyta) are more accurate. Some figures are not available on some OSes (system cache allocation is not documented on Windows API and swap usage per process is not maintained by Linux kernel), therefore they might not show up.
The verification output is displayed in the Status field at the bottom of the verifier panel. The result is also indicated by the circular markers in the rightmost column of the Overview panel. A grey marker indicates that the truth value of the property is unknown, a green marker that the property is satisfied, and a red marker that the property is not satisfied.
In case the Over Approximation or the Under Approximation options are enabled, the output of the verifier might be that property is "maybe satisfied". This happens when the verifier cannot determine the truth value of the property due to the approximations used.