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

pragma experimental SMTChecker;

contract C
{
	uint[] array;
	function f(uint x, uint p) public {
		require(x < 100);
		array[p] = 100;
		array[p] += array[p] + x;
		assert(array[p] < 300);
		assert(array[p] < 110);
	}
}
// ----
// Warning 6328: (192-214): CHC: Assertion violation happens here.\nCounterexample:\narray = []\nx = 0\np = 38\n\nTransaction trace:\nC.constructor()\nState: array = []\nC.f(0, 38)