mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
29 lines
1.1 KiB
Solidity
29 lines
1.1 KiB
Solidity
pragma experimental SMTChecker;
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contract C {
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function f(uint256 d) public pure {
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uint x = addmod(1, 2, d);
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assert(x < d);
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}
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function g(uint256 d) public pure {
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uint x = mulmod(1, 2, d);
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assert(x < d);
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}
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function h() public pure returns (uint256) {
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uint x = mulmod(0, 1, 2);
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uint y = mulmod(1, 0, 2);
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assert(x == y);
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uint z = addmod(0, 1, 2);
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uint t = addmod(1, 0, 2);
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assert(z == t);
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}
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}
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// ----
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// Warning 6321: (253-260): Unnamed return variable can remain unassigned. Add an explicit return with value to all non-reverting code paths or name the variable.
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// Warning 4281: (94-109): CHC: Division by zero happens here.\nCounterexample:\n\nd = 0\n\n\nTransaction trace:\nC.constructor()\nC.f(0)
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// Warning 6328: (113-126): CHC: Assertion violation happens here.\nCounterexample:\n\nd = 0\n\n\nTransaction trace:\nC.constructor()\nC.f(0)
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// Warning 4281: (180-195): CHC: Division by zero happens here.\nCounterexample:\n\nd = 0\n\n\nTransaction trace:\nC.constructor()\nC.g(0)
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// Warning 6328: (199-212): CHC: Assertion violation happens here.\nCounterexample:\n\nd = 0\n\n\nTransaction trace:\nC.constructor()\nC.g(0)
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