contract C { function f(uint256 d) public pure { uint x = addmod(1, 2, d); assert(x < d); } function g(uint256 d) public pure { uint x = mulmod(1, 2, d); assert(x < d); } function h() public pure returns (uint256) { uint x = mulmod(0, 1, 2); uint y = mulmod(1, 0, 2); assert(x == y); uint z = addmod(0, 1, 2); uint t = addmod(1, 0, 2); assert(z == t); } } // ==== // SMTEngine: all // ---- // Warning 6321: (220-227): Unnamed return variable can remain unassigned. Add an explicit return with value to all non-reverting code paths or name the variable. // Warning 4281: (61-76): CHC: Division by zero happens here.\nCounterexample:\n\nd = 0\nx = 0\n\nTransaction trace:\nC.constructor()\nC.f(0) // Warning 6328: (80-93): CHC: Assertion violation happens here.\nCounterexample:\n\nd = 0\nx = 0\n\nTransaction trace:\nC.constructor()\nC.f(0) // Warning 4281: (147-162): CHC: Division by zero happens here.\nCounterexample:\n\nd = 0\nx = 0\n\nTransaction trace:\nC.constructor()\nC.g(0) // Warning 6328: (166-179): CHC: Assertion violation happens here.\nCounterexample:\n\nd = 0\nx = 0\n\nTransaction trace:\nC.constructor()\nC.g(0)