Almost certainly you could stop. But that might be more riskier than continuing. For a start, you are not guaranteed to be in the same place on the runway to start the stop, the de-rate/flex may be so great that the slower acceleration performance might have put you further down the runway. Next, high speed rejects are not things you really want to do. Controllability, brake fires, steering problems are all problems you really don't want to deal with. It it better to fly single engine and then sort things out at your leisure. Lastly, pilots want things simple. Once you are past V1 you are flying. That is the script. So if you have an (even catastrophic) engine failure or fire you just carry on with the play as written and performed in the simulator. Only if the aircraft refuses to fly will I stay in the ground.