contract C { function f() public pure returns (bool) { bool b; int x = 42; assembly { b := 1 } assert(x == 42); // should hold assert(b); // should hold, but fails due to overapproximation return b; } } // ==== // SMTEngine: all // ---- // Warning 7737: (82-101): Inline assembly may cause SMTChecker to produce spurious warnings (false positives). // Warning 6328: (138-147): CHC: Assertion violation happens here. // Info 1391: CHC: 1 verification condition(s) proved safe! Enable the model checker option "show proved safe" to see all of them.