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by Jtsummers 2101 days ago
Intel (and presumably others) use formal methods to verify their hardware designs, or at least large portions of them. This started in earnest after the FDIV bug. Here's a presentation on the topic (dated now, but my understanding is the use of formal methods has only increased since then).

https://www.cl.cam.ac.uk/~jrh13/slides/nijmegen-21jun02/slid...