The seventh seed broke the service of the third seed eight times out of eight as she consigned Pervak to a second successive semi-final exit in Austria.
Cornet can pick up her second career WTA title with success in the final on Sunday if she is able to defeat Yanina Wickmayer of Belgium.
The second seed bested Luxembourger Mandy Minella 7-6 6-3 in the second last four encounter.
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