contract C { uint a; constructor(uint x) { a = x; } } abstract contract B1 is C { uint b1; constructor(uint x) { b1 = x + a; } } contract B2 is C { uint b2; constructor(uint x) C(x + 2) { b2 = x + a; } } contract A is B2, B1 { constructor(uint x) B2(x) B1(x) { assert(b1 == b2); assert(b1 != b2); } } // ==== // SMTEngine: all // SMTIgnoreCex: yes // ---- // Warning 4984: (193-198): CHC: Overflow (resulting value larger than 2**256 - 1) happens here. // Warning 4984: (209-214): CHC: Overflow (resulting value larger than 2**256 - 1) happens here. // Warning 6328: (302-318): CHC: Assertion violation happens here. // Info 1391: CHC: 2 verification condition(s) proved safe! Enable the model checker option "show proved safe" to see all of them.