Three times.
It means the person they've been negotiating with for the last two years has now gone.
They negotiated for two years, parliament rejected it three times, and Theresa May resigned.
The new Tory leader will have no mandate and no authority. Theresa May's deal is dead, and she resigned.
1. Renegotiate the Withdrawal Agreement
2. Leave with no agreement
3. Revoke Article 50
(Apparently this just cannot penetrate the head of English journalists who are convinced that if an Englishman says renegotiate, then renegotiate is what they will do).
3. At some point someone is going to revoke Article 50.
It doesn't matter how they do it. They can legislate for it, have a referendum about it, or a general election about it.