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Removing #rangeBool
reasoning
#2616
Conversation
(Some of) the added lemmas are tested by some of the I am not sure what a reasonable test that is not direct would look like. |
// Relationship with `#rangeBool` | ||
rule [b2w-rangeBool-eq-not-zero-l]: bool2Word (notBool (X ==Int 0)) => X requires #rangeBool(X) [simplification, comm] | ||
rule [b2w-rangeBool-eq-not-zero-r]: bool2Word (notBool (0 ==Int X)) => X requires #rangeBool(X) [simplification, comm] | ||
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Do we also want the ones for X ==Int 1
and 1 ==Int X
?
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I don't think so, at least not for now, because these ones (the one with X ==Int 0
specifically, and then I added the commutative version) come from the compiler as a check that something is a bool.
The lemmas removed in this PR slow down execution of some real-world proofs considerably because the
rangeBool
constraints are SMT-checked for every expression of the formnotBool ( X ==Int 0 )
ornotBool ( X ==Int 1 )
.The lemmas brought in reflect the (so-far-observed) checks made by the compiler, and their LHS is complex enough so they it will not be matched against unnecessarily.