Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:55:41 2013

Optimize a model with 44286 rows, 43626 columns and 174306 nonzeros
Presolve removed 4174 rows and 0 columns
Presolve time: 0.26s
Presolved: 40112 rows, 43626 columns, 165958 nonzeros
Variable types: 43560 continuous, 66 integer (66 binary)

Root relaxation: objective 8.409636e+04, 10499 iterations, 1.48 seconds

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

     0     0 84096.3619    0    4          - 84096.3619     -      -    1s
H    0     0                    84876.000000 84096.3619  0.92%     -    1s
H    0     0                    84280.000000 84096.3619  0.22%     -    2s
     0     0 84098.8612    0    5 84280.0000 84098.8612  0.21%     -    2s
     0     0 84098.8612    0    5 84280.0000 84098.8612  0.21%     -    2s
     0     0 84115.2568    0    3 84280.0000 84115.2568  0.20%     -    3s
     0     0 84115.2568    0    3 84280.0000 84115.2568  0.20%     -    4s
     0     0 84115.4680    0    5 84280.0000 84115.4680  0.20%     -    4s
     0     0 84115.4680    0    5 84280.0000 84115.4680  0.20%     -    4s
     0     2 84120.4310    0    5 84280.0000 84120.4310  0.19%     -    5s
*    6     5               4    84158.000000 84154.0505  0.00%  79.7    5s

Cutting planes:
  Gomory: 2
  Flow cover: 4

Explored 7 nodes (14405 simplex iterations) in 6.00 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.415800000000e+04, best bound 8.415405049988e+04, gap 0.0047%