Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:27:55 2013

Optimize a model with 51262 rows, 50552 columns and 201782 nonzeros
Presolve removed 71 rows and 0 columns
Presolve time: 0.23s
Presolved: 51191 rows, 50552 columns, 201711 nonzeros
Variable types: 50481 continuous, 71 integer (71 binary)

Root relaxation: objective 6.233766e+04, 6610 iterations, 4.84 seconds

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

     0     0 62337.6615    0   56          - 62337.6615     -      -    5s
H    0     0                    99941.000000 62337.6615  37.6%     -    8s
     0     0 77848.0063    0   14 99941.0000 77848.0063  22.1%     -   15s
H    0     0                    99260.127338 77848.0063  21.6%     -   15s
H    0     0                    91664.000000 77848.0063  15.1%     -   15s
     0     0 82837.1473    0    9 91664.0000 82837.1473  9.63%     -   16s
H    0     0                    87842.000000 82837.1473  5.70%     -   16s
     0     0 83241.8650    0    8 87842.0000 83241.8650  5.24%     -   17s
H    0     0                    86061.000000 83241.8650  3.28%     -   17s
H    0     0                    84082.000000 83241.8650  1.00%     -   17s
     0     0 83242.1222    0    7 84082.0000 83242.1222  1.00%     -   17s
     0     2 83278.0688    0    7 84082.0000 83278.0688  0.96%     -   19s
     5     7 83616.7222    3    4 84082.0000 83442.4697  0.76%   241   20s
*    8     5               6    83632.000000 83442.4697  0.23%   160   20s

Cutting planes:
  Implied bound: 69

Explored 18 nodes (16894 simplex iterations) in 20.60 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.363200000000e+04, best bound 8.363200000000e+04, gap 0.0%