Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:14:11 2013

Optimize a model with 27612 rows, 27092 columns and 108212 nonzeros
Presolve removed 830 rows and 0 columns
Presolve time: 0.15s
Presolved: 26782 rows, 27092 columns, 106552 nonzeros
Variable types: 27040 continuous, 52 integer (52 binary)

Root relaxation: objective 5.755992e+04, 4958 iterations, 0.55 seconds

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

     0     0 57559.9154    0    3          - 57559.9154     -      -    0s
H    0     0                    58769.000000 57559.9154  2.06%     -    0s
H    0     0                    58622.000000 57559.9154  1.81%     -    0s
     0     0 57560.7365    0    5 58622.0000 57560.7365  1.81%     -    1s
     0     0 57561.0194    0    5 58622.0000 57561.0194  1.81%     -    1s
     0     0 57561.0194    0    5 58622.0000 57561.0194  1.81%     -    1s
H    0     0                    57941.783784 57561.0194  0.66%     -    1s
H    0     0                    57882.000000 57561.0194  0.55%     -    1s
     0     0 57561.0194    0    3 57882.0000 57561.0194  0.55%     -    2s
     0     0 57561.1057    0    5 57882.0000 57561.1057  0.55%     -    2s
     0     2 57563.2041    0    5 57882.0000 57563.2041  0.55%     -    3s
H    3     3                    57875.642857 57684.8696  0.33%  41.0    3s
*   11     4               5    57855.000000 57764.4372  0.16%  48.0    3s
H   15     4                    57854.250000 57808.0000  0.08%  47.1    3s
*   16     4               4    57812.000000 57808.0000  0.01%  45.0    3s

Cutting planes:
  Gomory: 2
  Flow cover: 2

Explored 17 nodes (7780 simplex iterations) in 3.70 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.781200000000e+04, best bound 5.780800000000e+04, gap 0.0069%