If the auction times out before the auctioneer receives the winner acknowledge message, the auction will be reinitiated.
There are two possibilities that an auctioneer transitions to an auction close state: (1) the auctioneer successfully received a winner acknowledge message, so the target(s) are successfully assigned through auction process; (2) due to poor network conditions, the auction times out and the classify vehicles are left to determine their own tasks based on their knowledge of the fleet topology.