Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:30:45 2013

Optimize a model with 52632 rows, 51912 columns and 207432 nonzeros
Presolve removed 3480 rows and 0 columns
Presolve time: 0.32s
Presolved: 49152 rows, 51912 columns, 200472 nonzeros
Variable types: 51840 continuous, 72 integer (72 binary)

Root relaxation: objective 7.787851e+04, 9791 iterations, 1.81 seconds

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

     0     0 77878.5104    0    4          - 77878.5104     -      -    2s
H    0     0                    80102.000000 77878.5104  2.78%     -    2s
H    0     0                    79249.000000 77878.5104  1.73%     -    2s
H    0     0                    77923.000000 77878.5104  0.06%     -    2s
     0     0 77878.6622    0    5 77923.0000 77878.6622  0.06%     -    3s
     0     0 77878.6622    0    4 77923.0000 77878.6622  0.06%     -    4s
     0     0 77878.8851    0    5 77923.0000 77878.8851  0.06%     -    4s
     0     0 77878.8851    0    5 77923.0000 77878.8851  0.06%     -    4s
     0     0 77878.9023    0    5 77923.0000 77878.9023  0.06%     -    4s
     0     2 77879.1367    0    5 77923.0000 77879.1367  0.06%     -    5s

Cutting planes:
  Gomory: 1
  Flow cover: 2

Explored 8 nodes (13629 simplex iterations) in 5.42 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%