As verification is in general rather expensive, it is unfortunate that it is triggered for every save. It would be nicer (in particular for the backend) if verification would only be triggered manually.
Currently, the behavior is quite different wether one uses the output of local executable of ultimate or the web interface. This should be unified for both options
In that mode (enabled in workspace settings), also the last function call in the FailurePath should be highlighted in the source file and contain the error information. This is necessary due to the fact, that in case of THADS, the assertions are hidden in the library file and only the function call in the user space is under control of the user.