solidity/test/libsolidity/smtCheckerTests/modifiers/modifier_code_after_placeholder.sol

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2019-03-11 20:06:28 +00:00
pragma experimental SMTChecker;
contract C
{
uint x;
modifier m {
require(x > 0);
_;
// Fails because of overflow behavior.
assert(x > 1);
}
function f() m public {
assert(x > 0);
x = x + 1;
}
function g(uint _x) public {
x = _x;
}
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}
// ----
// Warning 4984: (203-208): CHC: Overflow (resulting value larger than 2**256 - 1) happens here.\nCounterexample:\nx = 115792089237316195423570985008687907853269984665640564039457584007913129639935\n\n\n\nTransaction trace:\nconstructor()\nState: x = 0\ng(115792089237316195423570985008687907853269984665640564039457584007913129639935)\nState: x = 115792089237316195423570985008687907853269984665640564039457584007913129639935\nf()
// Warning 6328: (136-149): CHC: Assertion violation happens here.\nCounterexample:\nx = 0\n\n\n\nTransaction trace:\nconstructor()\nState: x = 0\ng(115792089237316195423570985008687907853269984665640564039457584007913129639935)\nState: x = 115792089237316195423570985008687907853269984665640564039457584007913129639935\nf()