Gurobi 5.0.1 (linux64) logging started Fri Jan 18 07:03:27 2013 Optimize a model with 1400 rows, 150300 columns and 350400 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 0.28s Presolved: 1300 rows, 150200 columns, 300300 nonzeros Variable types: 150200 continuous, 0 integer (0 binary) Root relaxation: objective 7.543716e+05, 8452 iterations, 0.77 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 754371.571 0 4 - 754371.571 - - 1s 0 2 754371.571 0 4 - 754371.571 - - 3s 8 10 755316.076 4 1 - 754769.728 - 283 5s 43 45 755474.075 22 1 - 754769.728 - 173 10s 86 88 765392.035 43 1 - 754769.728 - 138 15s 166 168 767716.663 83 1 - 754769.728 - 93.7 20s 288 290 758409.531 144 1 - 754769.728 - 63.2 25s * 408 278 204 764951.26858 754769.728 1.33% 47.6 28s 449 307 757175.421 225 1 764951.269 754769.728 1.33% 43.5 30s * 595 37 298 757278.40695 754769.728 0.33% 33.5 34s 603 33 754849.118 6 1 757278.407 754769.728 0.33% 34.1 35s * 636 12 23 755729.74415 754769.728 0.13% 33.3 36s * 658 16 34 755679.58081 754769.728 0.12% 32.2 36s 705 7 cutoff 2 755679.581 755495.237 0.02% 33.6 40s Explored 723 nodes (32276 simplex iterations) in 40.56 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.556795808113e+05, best bound 7.556447027981e+05, gap 0.0046%