solidity/test/libsolidity/smtCheckerTests/operators/compound_sub_array_index.sol

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pragma experimental SMTChecker;
contract C
{
uint[] array;
function f(uint x, uint p) public {
require(x < 100);
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array[p] = 200;
array[p] -= array[p] - x;
assert(array[p] >= 0);
assert(array[p] < 90);
}
}
// ----
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// Warning 6328: (191-212): Assertion violation happens here.