Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:04:27 2013

Optimize a model with 21666 rows, 21206 columns and 84686 nonzeros
Presolve removed 1486 rows and 0 columns
Presolve time: 0.12s
Presolved: 20180 rows, 21206 columns, 81714 nonzeros
Variable types: 21160 continuous, 46 integer (46 binary)

Root relaxation: objective 5.725533e+04, 4542 iterations, 0.36 seconds

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

     0     0 57255.3339    0    3          - 57255.3339     -      -    0s
H    0     0                    57614.000000 57255.3339  0.62%     -    0s
H    0     0                    57331.000000 57255.3339  0.13%     -    0s
     0     0 57256.7751    0    4 57331.0000 57256.7751  0.13%     -    0s

Cutting planes:
  Gomory: 1
  Flow cover: 2

Explored 0 nodes (4548 simplex iterations) in 0.83 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.733100000000e+04, best bound 5.733100000000e+04, gap 0.0%