The present invention relates to a pharmaceutical composition for the treatment or prevention of viral infections comprising as an active principle at least one imidazo4,5-cpyridine derivative having the general formula :. The preferred configuration includes two towers with a display and a work surface supported therebeteween. When executed by a processor, the SegCount instruction causes the processor to determine a number of times that a GeneratePredicates instruction would be executed to generate a full set of predicates using active elements of an input vector.