+ if (verbose && cnt % 1000000 == 0) { std::cout<< cnt<< "alignment lines are loaded!"<< std::endl; }
+ //mate info is not complete, skip
+ if (!(((b->core.flag & 0x0040) && (b2->core.flag & 0x0080)) || ((b->core.flag & 0x0080) && (b2->core.flag & 0x0040)))) continue;
+ //unalignable reads, skip