contract C { function f(uint x, bool b) public pure { for (; x < 10; ) { if (b) ++x; else { break; } } // Fails because the loop might break. assert(x >= 10); } } // ==== // SMTEngine: all // SMTSolvers: z3 // ---- // Warning 6328: (168-183): 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.