Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:40:54 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 5.500277e+04, 5020 iterations, 2.38 seconds

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

     0     0 55002.7709    0   47          - 55002.7709     -      -    2s
H    0     0                    75500.000000 55002.7709  27.1%     -    3s
     0     0 65535.5431    0    8 75500.0000 65535.5431  13.2%     -    7s
H    0     0                    72255.956814 65535.5431  9.30%     -    7s
H    0     0                    69149.000000 65535.5431  5.23%     -    7s
     0     0 67077.5571    0    9 69149.0000 67077.5571  3.00%     -    8s
H    0     0                    67456.000000 67077.5571  0.56%     -    8s
     0     0 67098.2734    0    8 67456.0000 67098.2734  0.53%     -    9s
     0     0 67100.1380    0    7 67456.0000 67100.1380  0.53%     -    9s
H    0     0                    67290.000000 67100.1380  0.28%     -   10s
     0     2 67101.8711    0    7 67290.0000 67101.8711  0.28%     -   11s

Cutting planes:
  Implied bound: 54

Explored 12 nodes (12074 simplex iterations) in 11.84 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.729000000000e+04, best bound 6.729000000000e+04, gap 0.0%