Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:28:27 2013

Optimize a model with 34336 rows, 33756 columns and 134676 nonzeros
Presolve removed 58 rows and 0 columns
Presolve time: 0.15s
Presolved: 34278 rows, 33756 columns, 134618 nonzeros
Variable types: 33698 continuous, 58 integer (58 binary)

Root relaxation: objective 5.014899e+04, 4997 iterations, 2.71 seconds

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

     0     0 50148.9886    0   53          - 50148.9886     -      -    3s
H    0     0                    73153.000000 50148.9886  31.4%     -    4s
     0     0 62590.7066    0    5 73153.0000 62590.7066  14.4%     -    7s
H    0     0                    67686.824256 62590.7066  7.53%     -    7s
H    0     0                    65606.000000 62590.7066  4.60%     -    7s
     0     0 63536.5824    0    3 65606.0000 63536.5824  3.15%     -    8s
H    0     0                    65472.000000 63536.5824  2.96%     -    8s
     0     2 63541.4040    0    3 65472.0000 63541.4040  2.95%     -    8s
H    3     3                    64366.692308 63621.4005  1.16%   105    9s
H    5     4                    64201.770016 63621.4005  0.90%   119    9s
*    7     6               6    63769.000000 63621.4005  0.23%   144    9s
*    9     3               7    63765.000000 63621.4005  0.23%   125    9s
*   12     3               4    63726.000000 63662.9836  0.10%   130    9s
    16     2 63712.8215    2    4 63726.0000 63712.8215  0.02%   139   10s

Cutting planes:
  Implied bound: 54

Explored 18 nodes (11423 simplex iterations) in 10.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.372600000000e+04, best bound 6.372219658120e+04, gap 0.0060%