Varhaug brought out the final red flag of the day when he went off at turn 4, this time hitting the barrier which meant there was insufficient time for anyone to get back on track before the end of the Catalunya test.
Because of the inclement conditions on Wednesday, Luca Filippi's Tuesday morning time of 1:29.775s stood as the fastest single lap of the two days at Barcelona. Filippi did not take part in Coloni's testing effort on Wednesday, which was instead left to Daniël de Jong and this year's Formula 3 Italy runner-up Eddie Cheever Jr. Ocean Racing Technology was scheduled to field Kevin Ceccon and Ramon Pineiro, but neither driver put in more than an installation lap on Wednesday.
The GP2 teams will reassemble again in three weeks time for a second - and final - two-day post-season test session. That will take place at Jerez on November 22-23, and will constitute the last action of 2012 for the GP2 Series.
Full Tuesday test session times
Full Wednesday test session times