Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:56:11 2013 Optimize a model with 1900 rows, 101700 columns and 204100 nonzeros Presolve removed 200 rows and 300 columns Presolve time: 0.45s Presolved: 1700 rows, 101400 columns, 202800 nonzeros Variable types: 101000 continuous, 400 integer (400 binary) Root relaxation: objective 8.258498e+05, 7539 iterations, 0.68 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 825849.833 0 1 - 825849.833 - - 1s H 0 0 830634.24438 825849.833 0.58% - 1s 0 0 825858.298 0 1 830634.244 825858.298 0.57% - 1s 0 0 825860.446 0 1 830634.244 825860.446 0.57% - 1s 0 0 825869.694 0 1 830634.244 825869.694 0.57% - 2s 0 0 825873.981 0 1 830634.244 825873.981 0.57% - 2s 0 0 825873.981 0 1 830634.244 825873.981 0.57% - 2s 0 0 825873.981 0 1 830634.244 825873.981 0.57% - 2s 0 0 825873.981 0 1 830634.244 825873.981 0.57% - 3s 0 0 825873.981 0 1 830634.244 825873.981 0.57% - 3s 0 0 825873.981 0 1 830634.244 825873.981 0.57% - 3s 0 2 825889.195 0 1 830634.244 825889.195 0.57% - 4s * 4 3 4 826102.66657 826102.667 0.0% 89.2 4s Cutting planes: Flow cover: 9 Explored 5 nodes (8326 simplex iterations) in 4.77 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.261026665679e+05, best bound 8.261026665679e+05, gap 0.0000%