solidity/test/libsolidity/smtCheckerTests/unchecked/unchecked_div_by_zero.sol

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2020-12-16 17:32:34 +00:00
pragma experimental SMTChecker;
contract C {
function div(uint256 a, uint256 b) public pure returns (uint256) {
// Does not disable div by zero check
unchecked {
return a / b;
}
}
function mod(uint256 a, uint256 b) public pure returns (uint256) {
// Does not disable div by zero check
unchecked {
return a % b;
}
}
}
// ----
// Warning 4281: (202-207): CHC: Division by zero happens here.\nCounterexample:\n\na = 0\nb = 0\n = 0\n\nTransaction trace:\nC.constructor()\nC.div(0, 0)
// Warning 4281: (382-387): CHC: Division by zero happens here.\nCounterexample:\n\na = 0\nb = 0\n = 0\n\nTransaction trace:\nC.constructor()\nC.mod(0, 0)