Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:07:20 2013

Optimize a model with 46988 rows, 46308 columns and 185028 nonzeros
Presolve removed 2791 rows and 0 columns
Presolve time: 0.27s
Presolved: 44197 rows, 46308 columns, 179446 nonzeros
Variable types: 46240 continuous, 68 integer (68 binary)

Root relaxation: objective 8.932486e+04, 13003 iterations, 2.47 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0 89324.8585    0    5          - 89324.8585     -      -    2s
H    0     0                    91091.000000 89324.8585  1.94%     -    3s
H    0     0                    89545.000000 89324.8585  0.25%     -    3s
     0     0 89328.2799    0    7 89545.0000 89328.2799  0.24%     -    3s
     0     0 89328.5676    0    7 89545.0000 89328.5676  0.24%     -    3s
     0     0 89328.5676    0    7 89545.0000 89328.5676  0.24%     -    4s
     0     0 89335.5293    0    5 89545.0000 89335.5293  0.23%     -    4s
H    0     0                    89497.000000 89335.5293  0.18%     -    5s
     0     0 89358.2538    0    3 89497.0000 89358.2538  0.16%     -    7s
     0     0 89367.1975    0    4 89497.0000 89367.1975  0.15%     -    7s
     0     0 89369.0578    0    6 89497.0000 89369.0578  0.14%     -    7s
     0     0 89372.2020    0    5 89497.0000 89372.2020  0.14%     -    7s
     0     0 89372.2020    0    5 89497.0000 89372.2020  0.14%     -    8s
     0     0 89372.2020    0    5 89497.0000 89372.2020  0.14%     -    8s
     0     0 89372.6008    0    4 89497.0000 89372.6008  0.14%     -    8s
     0     2 89372.9017    0    4 89497.0000 89372.9017  0.14%     -    9s

Cutting planes:
  Gomory: 3
  Flow cover: 2

Explored 7 nodes (19008 simplex iterations) in 9.32 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.949700000000e+04, best bound 8.949700000000e+04, gap 0.0%