Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:40:05 2013

Optimize a model with 39122 rows, 38502 columns and 153822 nonzeros
Presolve removed 1723 rows and 0 columns
Presolve time: 0.22s
Presolved: 37399 rows, 38502 columns, 150376 nonzeros
Variable types: 38440 continuous, 62 integer (62 binary)

Root relaxation: objective 7.759082e+04, 8745 iterations, 1.16 seconds

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

     0     0 77590.8223    0    3          - 77590.8223     -      -    1s
H    0     0                    78565.000000 77590.8223  1.24%     -    1s
H    0     0                    77692.000000 77590.8223  0.13%     -    1s
     0     0 77599.8164    0    4 77692.0000 77599.8164  0.12%     -    1s
     0     0 77599.8164    0    4 77692.0000 77599.8164  0.12%     -    2s
     0     0 77599.8164    0    3 77692.0000 77599.8164  0.12%     -    2s
     0     0 77607.0493    0    4 77692.0000 77607.0493  0.11%     -    3s
     0     0 77607.0493    0    4 77692.0000 77607.0493  0.11%     -    3s
     0     0 77633.9783    0    2 77692.0000 77633.9783  0.07%     -    3s
     0     0 77637.6622    0    1 77692.0000 77637.6622  0.07%     -    3s
     0     1 77680.0000    0    1 77692.0000 77680.0000  0.02%     -    3s

Cutting planes:
  Gomory: 2
  Flow cover: 1

Explored 2 nodes (11903 simplex iterations) in 3.52 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.769200000000e+04, best bound 7.769200000000e+04, gap 0.0%