solidity/test/libsolidity/smtCheckerTests/special/blockhash.sol

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contract C
{
function f(uint x) public payable {
assert(blockhash(x) > 0);
assert(blockhash(2) > 0);
uint y = x;
assert(blockhash(x) == blockhash(y));
}
}
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// ====
// SMTEngine: all
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// SMTIgnoreCex: yes
// ----
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// Warning 6328: (52-76): CHC: Assertion violation happens here.
// Warning 6328: (80-104): CHC: Assertion violation happens here.
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// Info 1391: CHC: 1 verification condition(s) proved safe! Enable the model checker option "show proved safe" to see all of them.