solidity/test/libsolidity/smtCheckerTests/math/addmod_1.sol
2021-03-30 17:55:21 +02:00

18 lines
745 B
Solidity

pragma experimental SMTChecker;
contract C {
function f() public pure {
assert(addmod(2**256 - 1, 10, 9) == 7);
uint y = 0;
uint x = addmod(2**256 - 1, 10, y);
assert(x == 1);
}
function g(uint x, uint y, uint k) public pure returns (uint) {
return addmod(x, y, k);
}
}
// ----
// Warning 4281: (141-166): CHC: Division by zero happens here.\nCounterexample:\n\ny = 0\nx = 0\n\nTransaction trace:\nC.constructor()\nC.f()
// Warning 6328: (170-184): CHC: Assertion violation happens here.\nCounterexample:\n\ny = 0\nx = 0\n\nTransaction trace:\nC.constructor()\nC.f()
// Warning 4281: (263-278): CHC: Division by zero happens here.\nCounterexample:\n\nx = 0\ny = 0\nk = 0\n = 0\n\nTransaction trace:\nC.constructor()\nC.g(0, 0, 0)