Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:17:59 2013

Optimize a model with 49770 rows, 49070 columns and 196070 nonzeros
Presolve removed 2691 rows and 0 columns
Presolve time: 0.30s
Presolved: 47079 rows, 49070 columns, 190688 nonzeros
Variable types: 49000 continuous, 70 integer (70 binary)

Root relaxation: objective 8.486957e+04, 11240 iterations, 2.11 seconds

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

     0     0 84869.5713    0    4          - 84869.5713     -      -    2s
H    0     0                    85529.000000 84869.5713  0.77%     -    2s
     0     0 84870.1116    0    5 85529.0000 84870.1116  0.77%     -    3s
     0     0 84870.1116    0    5 85529.0000 84870.1116  0.77%     -    3s
H    0     0                    85214.929412 84870.1116  0.40%     -    4s
     0     0 84870.1116    0    4 85214.9294 84870.1116  0.40%     -    6s
     0     0 84870.1116    0    5 85214.9294 84870.1116  0.40%     -    6s
     0     0 84870.1116    0    5 85214.9294 84870.1116  0.40%     -    6s
H    0     0                    85125.000000 84870.1116  0.30%     -    7s
     0     2 84872.4800    0    5 85125.0000 84872.4800  0.30%     -    7s
H    3     3                    85025.260823 84912.0000  0.13%  71.3    7s
*    6     2               5    84974.000000 84934.4660  0.05%   109    7s

Cutting planes:
  Gomory: 1
  Flow cover: 3

Explored 12 nodes (16459 simplex iterations) in 7.83 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.497400000000e+04, best bound 8.497400000000e+04, gap 0.0%