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

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pragma experimental SMTChecker;
contract C
{
mapping (uint => uint) map;
function f(uint x) public {
map[x] = 5;
uint a = --map[x];
assert(map[x] == 4);
assert(a == 4);
uint b = map[x]--;
assert(map[x] == 3);
// Should fail.
assert(b > 4);
}
}
// ----
// Warning: (244-257): Assertion violation happens here