Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:18:19 2013

Optimize a model with 49770 rows, 49070 columns and 196070 nonzeros
Presolve removed 2358 rows and 0 columns
Presolve time: 0.29s
Presolved: 47412 rows, 49070 columns, 191354 nonzeros
Variable types: 49000 continuous, 70 integer (70 binary)

Root relaxation: objective 7.787780e+04, 8351 iterations, 1.27 seconds

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

     0     0 77877.8031    0    2          - 77877.8031     -      -    1s
H    0     0                    78087.000000 77877.8031  0.27%     -    1s
     0     0 77879.0486    0    3 78087.0000 77879.0486  0.27%     -    2s
     0     0 77879.0486    0    2 78087.0000 77879.0486  0.27%     -    3s
     0     0 77879.0486    0    3 78087.0000 77879.0486  0.27%     -    3s
     0     0 77879.0486    0    3 78087.0000 77879.0486  0.27%     -    3s
     0     0 77879.0486    0    3 78087.0000 77879.0486  0.27%     -    4s
     0     2 77883.9513    0    3 78087.0000 77883.9513  0.26%     -    4s
     2     4 77958.1600    2    2 78087.0000 77920.8077  0.21%   119    5s
H    9     4                    78048.000000 77928.5333  0.15%  58.0    5s
*   22     1               5    77974.000000 77974.0000   0.0%  58.8    5s

Cutting planes:
  Gomory: 1
  Flow cover: 3

Explored 23 nodes (13681 simplex iterations) in 5.64 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.797400000000e+04, best bound 7.797400000000e+04, gap 0.0%