The 1994 Imola Grand Prix is remembered mostly for the deaths of two drivers: rookie Roland Ratzenberger during Saturday qualifying, and three-time world champion Ayrton Senna during the race.
Senna crashed on the sixth lap, causing the red flag to be shown, so that all drivers returned to the pits. Senna received medical treatment on-site, and was then airlifted to hospital.
The race was then restarted from the grid in the order they were at the point the race was stopped, and the times of cars at the end of the fifth lap were also considered:
From the wikipedia article:
Regulations meant that the original sixth lap would be deleted and the
race would be restarted from the beginning of said lap. The first five
laps would be added to the second part of the race and the overall
result would be decided on aggregate. The race ran to a total of 58
laps, five from the first section and 53 from the second section.
Berger got the better start than Schumacher, and led on the track, but not overall, as Schumacher had been faster over the first five laps, hence the "corrected time".