How are cars classified if they DNF simultaneously?

[woohoo]

Well, the “countdown” rule would come into play here, I think.
If both drivers are equal on wins, then the number of second places counts. if they are equal, the number of third places and so on.
So in this a finish (even outside points) would count for more than a DNF.
So I suppose, in this case Hamilton and Verstappen would have to have the exact number wins, second, third places and so on, till the difference comes down to finishes for this situation to play out.

[pob]

They went into the grand prix tied on points. Reptayn's point is Hamilton would have ended on more points as he would have been classified higher (and in the points) as he was ahead the last time they went over the finish line if they both dnf'ed on the final lap.

[woohoo]

Yes, but in the case of drivers being equal on points, the number of highest placed positions trumps.
So, as Verstappen has more wins (9) that Hamilton (8), the count back rule would come into effect.