Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:34:06 2013 Optimize a model with 1800 rows, 100700 columns and 201900 nonzeros Presolve removed 300 rows and 200 columns Presolve time: 0.23s Presolved: 1500 rows, 100500 columns, 201100 nonzeros Variable types: 100400 continuous, 100 integer (100 binary) Root relaxation: objective 9.188392e+05, 6586 iterations, 0.46 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 918839.221 0 4 - 918839.221 - - 0s H 0 0 943391.91312 918839.221 2.60% - 1s 0 0 918950.838 0 4 943391.913 918950.838 2.59% - 1s H 0 0 921451.51041 918950.838 0.27% - 1s 0 0 918991.369 0 3 921451.510 918991.369 0.27% - 1s 0 0 918994.564 0 3 921451.510 918994.564 0.27% - 2s 0 0 918997.267 0 2 921451.510 918997.267 0.27% - 2s 0 0 918997.267 0 2 921451.510 918997.267 0.27% - 2s 0 0 918997.385 0 2 921451.510 918997.385 0.27% - 2s 0 0 918998.298 0 2 921451.510 918998.298 0.27% - 3s 0 0 918998.881 0 2 921451.510 918998.881 0.27% - 3s 0 0 918999.543 0 2 921451.510 918999.543 0.27% - 3s 0 0 918999.692 0 2 921451.510 918999.692 0.27% - 3s 0 0 918999.788 0 2 921451.510 918999.788 0.27% - 3s 0 0 918999.861 0 2 921451.510 918999.861 0.27% - 4s 0 0 918999.898 0 2 921451.510 918999.898 0.27% - 4s 0 0 918999.962 0 2 921451.510 918999.962 0.27% - 4s 0 0 918999.962 0 2 921451.510 918999.962 0.27% - 4s 0 2 919013.418 0 2 921451.510 919013.418 0.26% - 5s * 13 6 11 919347.86857 919075.168 0.03% 101 6s Cutting planes: Flow cover: 24 Explored 21 nodes (9979 simplex iterations) in 7.33 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.193478685680e+05, best bound 9.192916129588e+05, gap 0.0061%