Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:42:34 2013

Optimize a model with 39184 rows, 38564 columns and 153884 nonzeros
Presolve removed 62 rows and 0 columns
Presolve time: 0.17s
Presolved: 39122 rows, 38564 columns, 153822 nonzeros
Variable types: 38502 continuous, 62 integer (62 binary)

Root relaxation: objective 5.181352e+04, 4792 iterations, 2.12 seconds

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

     0     0 51813.5250    0   48          - 51813.5250     -      -    2s
H    0     0                    70642.000000 51813.5250  26.7%     -    3s
     0     0 60183.8937    0   15 70642.0000 60183.8937  14.8%     -    6s
H    0     0                    67837.000000 60183.8937  11.3%     -    7s
     0     0 62300.6873    0   10 67837.0000 62300.6873  8.16%     -    8s
H    0     0                    67403.000000 62300.6873  7.57%     -    8s
     0     0 62438.7032    0    4 67403.0000 62438.7032  7.37%     -    9s
H    0     0                    64862.378167 62438.7032  3.74%     -    9s
H    0     0                    64542.000000 62438.7032  3.26%     -    9s
H    0     0                    62604.000000 62438.7032  0.26%     -    9s
     0     2 62451.2550    0    4 62604.0000 62451.2550  0.24%     -   10s
*    8     8               7    62566.000000 62499.6639  0.11%  58.2   10s

Cutting planes:
  Implied bound: 60

Explored 33 nodes (11407 simplex iterations) in 11.61 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.256600000000e+04, best bound 6.256600000000e+04, gap 0.0%