contract Simple{

    address destination;
    address source;

    function set(address source_taint) public{
        destination = source_taint;
    }

    function set2() public{
        destination = source;
    }
}

contract Reference{

    struct St{
        uint val;
    }

    St destination;
    St source;
    St destination_indirect_1;
    St destination_indirect_2;

    function set(uint source_taint) public{
        destination.val = source_taint;
    }

    function set2() public{
        destination.val = source.val;
    }

    function set3(uint source_taint) public{
        St storage ref = destination_indirect_1;
        if(true){
            ref = destination_indirect_2;
        }
        ref.val = source_taint;
    }
}

contract SolidityVar{

    address addr_1;
    address addr_2;

    constructor() public{
        addr_1 = msg.sender;
    }

}

contract Intermediate{

    uint destination;
    uint source_intermediate;
    uint source;

    function f() public{
        destination = source_intermediate;
    }
    function f2() public{
        source_intermediate = source;
    }

}


contract Base{

    uint destination;
    uint source_intermediate;
    uint source;

    function f() public{
        destination = source_intermediate;
    }
}
contract Derived is Base{

    function f2() public{
        source_intermediate = source;
    }


}