That's why you need to formal, and then formal your formal. https://github.com/ucb-bar/riscv-torture/issues/11 …pic.twitter.com/GPM5UYeKgb
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This is a trivial bug for a conventional test suite to find. Formal shines brightest on complex sequences/timings.
And yet: The conventional test suits did not find that bug. :) Not riscv-torture, not riscv-tests, not anything csmith+gcc generates.
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Rephrasing: trivial for an industrial grade test suite to find.
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