Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:47:06 2013

Optimize a model with 41664 rows, 41024 columns and 163904 nonzeros
Presolve removed 1768 rows and 0 columns
Presolve time: 0.24s
Presolved: 39896 rows, 41024 columns, 160368 nonzeros
Variable types: 40960 continuous, 64 integer (64 binary)

Root relaxation: objective 7.728670e+04, 8820 iterations, 1.29 seconds

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

     0     0 77286.7010    0    2          - 77286.7010     -      -    1s
H    0     0                    78036.000000 77286.7010  0.96%     -    1s
H    0     0                    77337.000000 77286.7010  0.07%     -    1s
     0     0 77289.9538    0    2 77337.0000 77289.9538  0.06%     -    2s
     0     0 77289.9538    0    1 77337.0000 77289.9538  0.06%     -    2s
     0     0 77289.9538    0    2 77337.0000 77289.9538  0.06%     -    2s
     0     0 77290.0720    0    2 77337.0000 77290.0720  0.06%     -    3s
     0     0     cutoff    0      77337.0000 77337.0000   0.0%     -    3s

Cutting planes:
  Gomory: 1
  Flow cover: 3

Explored 0 nodes (11224 simplex iterations) in 3.18 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.733700000000e+04, best bound 7.733700000000e+04, gap 0.0%