pragma experimental SMTChecker;

abstract contract D {
	function d() external virtual;
}

contract C {
	uint x;
	D d;

	function inc() public {
		++x;
	}

	function f() public {
		d.d();
		assert(x < 10);
	}
}
// ----
// Warning 6328: (189-203): Assertion violation happens here
// Warning 2661: (146-149): Overflow (resulting value larger than 2**256 - 1) happens here