solidity/test/libsolidity/smtCheckerTests/overflow/safe_add_1.sol

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pragma experimental SMTChecker;
contract C
{
function add(uint x, uint y) public pure returns (uint) {
require(x + y >= x);
return x + y;
}
}
// ----
// Warning 4984: (115-120): CHC: Overflow (resulting value larger than 2**256 - 1) happens here.