Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:20:44 2013 Optimize a model with 1800 rows, 100600 columns and 201700 nonzeros Presolve removed 400 rows and 300 columns Presolve time: 0.42s Presolved: 1400 rows, 100300 columns, 200900 nonzeros Variable types: 100200 continuous, 100 integer (100 binary) Root relaxation: objective 8.654105e+05, 5383 iterations, 1.14 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 865410.545 0 2 - 865410.545 - - 1s H 0 0 876482.34250 865410.545 1.26% - 2s 0 2 865496.674 0 2 876482.342 865496.674 1.25% - 3s H 1 1 875301.13610 865496.674 1.12% 0.0 3s H 4 4 867835.85010 866153.143 0.19% 214 4s 8 7 cutoff 5 867835.850 866153.143 0.19% 275 5s * 9 6 6 867736.30281 866153.143 0.18% 260 5s * 11 4 6 867427.49007 866153.143 0.15% 222 5s H 17 5 866849.82663 866605.466 0.03% 187 6s * 18 4 6 866731.75201 866605.466 0.01% 178 6s Explored 23 nodes (8717 simplex iterations) in 6.60 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.667317520100e+05, best bound 8.667082754909e+05, gap 0.0027%