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https://github.com/ethereum/solidity
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14 lines
525 B
Solidity
14 lines
525 B
Solidity
pragma experimental SMTChecker;
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contract C {
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function add(uint16 a, uint16 b) public pure returns (uint16) {
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return a + b; // can overflow
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}
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function f(uint16 a, uint16 b, uint16 c) public pure returns (uint16) {
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unchecked { return add(a, b) + c; } // add can still overflow, `+ c` can't
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}
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}
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// ----
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// Warning 4984: (129-134): CHC: Overflow (resulting value larger than 65535) happens here.\nCounterexample:\n\na = 1\nb = 65535\n = 0\n\nTransaction trace:\nC.constructor()\nC.add(1, 65535)
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