Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:52:38 2013

Optimize a model with 57075 rows, 56325 columns and 225075 nonzeros
Presolve removed 6034 rows and 0 columns
Presolve time: 0.36s
Presolved: 51041 rows, 56325 columns, 213007 nonzeros
Variable types: 56250 continuous, 75 integer (75 binary)

Root relaxation: objective 8.560797e+04, 11201 iterations, 2.27 seconds

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

     0     0 85607.9660    0    3          - 85607.9660     -      -    2s
H    0     0                    87801.000000 85607.9660  2.50%     -    2s
     0     0 85609.6323    0    4 87801.0000 85609.6323  2.50%     -    3s
     0     0 85609.6323    0    4 87801.0000 85609.6323  2.50%     -    3s
H    0     0                    86781.691824 85609.6323  1.35%     -    5s
H    0     0                    86482.000000 85609.6323  1.01%     -    5s
     0     2 85617.7598    0    4 86482.0000 85617.7598  1.00%     -    6s
H    5     5                    86042.620690 85803.6328  0.28%   199    6s
H    6     6                    86017.050000 85803.6328  0.25%   223    7s
*    7     6               5    85957.000000 85803.6328  0.18%   209    7s

Cutting planes:
  Gomory: 1
  Flow cover: 3

Explored 19 nodes (14015 simplex iterations) in 7.57 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.595700000000e+04, best bound 8.595164827586e+04, gap 0.0062%