Ok I didn't notice that your setup menu lack of high performance option.
Check in terminal do You have aps options for spectre. It's possible that You have not some evnironments variables or your system lack of some packages.
Hmm, maybe the problem lies in too old version of Virtuoso? Since 6.1.3 "high performance sims" option exist in menu.
At this moment You can editing run Simulation script by adding proper options to run with aps and multithreading.