Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:58:43 2013 Optimize a model with 16440 rows, 16040 columns and 64040 nonzeros Presolve removed 595 rows and 0 columns Presolve time: 0.09s Presolved: 15845 rows, 16040 columns, 62850 nonzeros Variable types: 16000 continuous, 40 integer (40 binary) Root relaxation: objective 4.351284e+04, 2825 iterations, 0.19 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 43512.8403 0 4 - 43512.8403 - - 0s H 0 0 44557.000000 43512.8403 2.34% - 0s 0 0 43516.8414 0 7 44557.0000 43516.8414 2.33% - 0s 0 0 43516.9177 0 7 44557.0000 43516.9177 2.33% - 0s 0 2 43551.9116 0 7 44557.0000 43551.9116 2.26% - 0s H 3 3 44012.310678 43713.7393 0.68% 87.7 1s * 4 4 4 43818.000000 43713.7393 0.24% 91.2 1s Cutting planes: Gomory: 3 Flow cover: 6 Explored 8 nodes (3537 simplex iterations) in 1.15 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.381800000000e+04, best bound 4.381780131316e+04, gap 0.0005%