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

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contract C {
function f() public pure {
int8 x = 1;
int8 y = 0;
x &= y;
assert(x != 0); // fails
x = -1; y = 3;
y &= x;
assert(y == 3);
y = -1;
y &= x;
assert(y == -1);
y = 127;
x &= y;
assert(x == 127);
}
}
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// ====
// SMTEngine: all
// ----
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// Warning 6328: (81-95): CHC: Assertion violation happens here.
// Info 1391: CHC: 3 verification condition(s) proved safe! Enable the model checker option "show proved safe" to see all of them.