contract C { bytes b; function f() public { require(b.length == 0); b.push() = bytes1(uint8(1)); assert(b[0] == bytes1(uint8(1))); } function g() public { bytes1 one = bytes1(uint8(1)); b.push() = one; assert(b[b.length - 1] == one); // Fails assert(b[b.length - 1] == bytes1(uint8(100))); } } // ==== // SMTEngine: all // SMTIgnoreCex: yes // ---- // Warning 6328: (265-310): CHC: Assertion violation happens here. // Info 1391: CHC: 7 verification condition(s) proved safe! Enable the model checker option "show proved safe" to see all of them.