Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:33:16 2013

Optimize a model with 52704 rows, 51984 columns and 207504 nonzeros
Presolve removed 72 rows and 0 columns
Presolve time: 0.23s
Presolved: 52632 rows, 51984 columns, 207432 nonzeros
Variable types: 51912 continuous, 72 integer (72 binary)

Root relaxation: objective 5.875990e+04, 6447 iterations, 4.25 seconds

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

     0     0 58759.8959    0   54          - 58759.8959     -      -    4s
H    0     0                    98384.000000 58759.8959  40.3%     -    6s
     0     0 72515.8163    0   20 98384.0000 72515.8163  26.3%     -   14s
H    0     0                    84013.000000 72515.8163  13.7%     -   15s
     0     0 77521.8601    0    5 84013.0000 77521.8601  7.73%     -   17s
H    0     0                    82996.544118 77521.8601  6.60%     -   18s
H    0     0                    81303.000000 77521.8601  4.65%     -   18s
     0     0 77878.5104    0    4 81303.0000 77878.5104  4.21%     -   18s
H    0     0                    79269.000000 77878.5104  1.75%     -   18s
H    0     0                    77923.000000 77878.5104  0.06%     -   19s
     0     2 77879.6078    0    4 77923.0000 77879.6078  0.06%     -   21s

Cutting planes:
  Implied bound: 68

Explored 9 nodes (14719 simplex iterations) in 21.65 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.792300000000e+04, best bound 7.792300000000e+04, gap 0.0%