Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:04:00 2013 Optimize a model with 20790 rows, 20340 columns and 81090 nonzeros Presolve removed 45 rows and 0 columns Presolve time: 0.09s Presolved: 20745 rows, 20340 columns, 81045 nonzeros Variable types: 20295 continuous, 45 integer (45 binary) Root relaxation: objective 3.631877e+04, 2484 iterations, 0.59 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 36318.7696 0 37 - 36318.7696 - - 0s H 0 0 45902.000000 36318.7696 20.9% - 1s 0 0 40945.2882 0 4 45902.0000 40945.2882 10.8% - 1s H 0 0 43373.863853 40945.2882 5.60% - 1s H 0 0 42110.000000 40945.2882 2.77% - 1s 0 0 41176.7267 0 5 42110.0000 41176.7267 2.22% - 2s 0 0 41198.0471 0 3 42110.0000 41198.0471 2.17% - 2s H 0 0 41928.000000 41198.0471 1.74% - 2s H 0 0 41817.000000 41198.0471 1.48% - 2s 0 2 41199.9977 0 3 41817.0000 41199.9977 1.48% - 2s * 2 2 2 41314.000000 41314.0000 0.0% 87.0 2s Cutting planes: Implied bound: 37 Explored 3 nodes (4147 simplex iterations) in 2.54 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.131400000000e+04, best bound 4.131400000000e+04, gap 0.0%