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https://github.com/ethereum/solidity
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14 lines
546 B
Solidity
14 lines
546 B
Solidity
pragma experimental SMTChecker;
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contract test {
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function f() public pure returns (bool) {
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int256 x = -2**255;
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unchecked { assert(-x == x); }
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assert(-x == x); // CHC apparently does not create an underflow target for unary minus
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return true;
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}
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}
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// ----
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// Warning 6328: (143-158): CHC: Assertion violation happens here.\nCounterexample:\n\n = false\n\nTransaction trace:\ntest.constructor()\ntest.f()
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// Warning 2661: (150-152): BMC: Overflow (resulting value larger than 0x80 * 2**248 - 1) happens here.
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