Inbound pass

[kslcol]

How would it apply in this case? A1 ends his dribble and cannot find anyone to whom to pass the ball, so to avert not having a 5 second closely guarded violation called, A1 intentionally throws the ball against B1. A1 catches the ball and starts another dribble. The official calls this a double dribble. The coach inquires about the call and the official informs the coach that voluntarily throwing the ball against another player is illegal. Is the official correct?