Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:43:00 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 5.373182e+04, 5261 iterations, 2.61 seconds

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

     0     0 53731.8200    0   49          - 53731.8200     -      -    2s
H    0     0                    84634.000000 53731.8200  36.5%     -    4s
     0     0 65201.0266    0   13 84634.0000 65201.0266  23.0%     -    8s
H    0     0                    80920.003881 65201.0266  19.4%     -    8s
H    0     0                    73064.000000 65201.0266  10.8%     -    8s
     0     0 68984.4243    0    8 73064.0000 68984.4243  5.58%     -   10s
     0     0 69316.1499    0    5 73064.0000 69316.1499  5.13%     -   10s
H    0     0                    72455.864102 69316.1499  4.33%     -   10s
H    0     0                    71934.000000 69316.1499  3.64%     -   10s
H    0     0                    69894.000000 69316.1499  0.83%     -   10s
     0     2 69340.3425    0    5 69894.0000 69340.3425  0.79%     -   11s
*    7     6               6    69701.000000 69372.1624  0.47%   111   12s
H   13     6                    69602.000000 69372.1624  0.33%  77.8   12s
*   37    11               6    69520.000000 69401.2720  0.17%  80.4   13s

Cutting planes:
  Implied bound: 59

Explored 54 nodes (14963 simplex iterations) in 14.03 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.952000000000e+04, best bound 6.952000000000e+04, gap 0.0%