contract C { int x; function g() public { x = 42; } function f() public { x = 1; bool success = false; try this.g() { success = true; assert(x == 42); // should hold } catch Error (string memory /*reason*/) { assert(x == 1); // should hold } catch (bytes memory /*reason*/) { assert(x == 1); // should hold } assert((success && x == 42) || (!success && x == 1)); // should hold assert(success); // can fail } } // ==== // SMTEngine: all // ---- // Warning 6328: (415-430): CHC: Assertion violation happens here. // Info 1391: CHC: 4 verification condition(s) proved safe! Enable the model checker option "show proved safe" to see all of them.