contract A { int x = 0; modifier m virtual { assert(x == 0); // should hold assert(x == 42); // should fail _; } } contract C is A { modifier m override { assert(x == 1); // This assert is not reachable, should NOT be reported _; } function f() public A.m returns (uint) { } } // ==== // SMTEngine: all // ---- // Warning 6328: (83-98): 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.