Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:44:05 2013

Optimize a model with 54166 rows, 53436 columns and 213306 nonzeros
Presolve removed 73 rows and 0 columns
Presolve time: 0.24s
Presolved: 54093 rows, 53436 columns, 213233 nonzeros
Variable types: 53363 continuous, 73 integer (73 binary)

Root relaxation: objective 6.549363e+04, 6998 iterations, 4.35 seconds

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

     0     0 65493.6275    0   52          - 65493.6275     -      -    4s
H    0     0                    99884.000000 65493.6275  34.4%     -    6s
     0     0 80253.3627    0   14 99884.0000 80253.3627  19.7%     -   14s
H    0     0                    90823.000000 80253.3627  11.6%     -   14s
     0     0 82228.1022    0    8 90823.0000 82228.1022  9.46%     -   16s
H    0     0                    90705.000000 82228.1022  9.35%     -   16s
     0     0 82571.7668    0    4 90705.0000 82571.7668  8.97%     -   17s
H    0     0                    87372.793372 82571.7668  5.49%     -   17s
H    0     0                    84943.000000 82571.7668  2.79%     -   17s
     0     0 82665.3154    0    6 84943.0000 82665.3154  2.68%     -   18s
H    0     0                    83494.000000 82665.3154  0.99%     -   18s
     0     0 82671.7874    0    2 83494.0000 82671.7874  0.98%     -   18s
     0     2 82673.8631    0    2 83494.0000 82673.8631  0.98%     -   21s
H    5     4                    82778.000000 82692.1952  0.10%   152   22s
*    9     2               8    82760.000000 82692.1952  0.08%   111   22s

Cutting planes:
  Gomory: 1
  Implied bound: 72

Explored 16 nodes (17145 simplex iterations) in 22.59 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.276000000000e+04, best bound 8.275400000000e+04, gap 0.0072%