Remember Pentium’s division bug (on mobile so cannot cooy-paste). We need some king of certificate of proof, not just some black-box which answers “OK”, “NOT-OK”.
The theorem proves that are discussed here already do that.
blah blah blah type checkers blah blah blah can be run on different chipsets / OS's blah blah blah computers are several orders of magnitude more accurate blah blah blah not really the issue.