Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:53:48 2013

Optimize a model with 9330 rows, 9030 columns and 36030 nonzeros
Presolve removed 540 rows and 0 columns
Presolve time: 0.05s
Presolved: 8790 rows, 9030 columns, 34950 nonzeros
Variable types: 9000 continuous, 30 integer (30 binary)

Root relaxation: objective 3.909396e+04, 1426 iterations, 0.06 seconds

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

     0     0 39093.9594    0    2          - 39093.9594     -      -    0s
H    0     0                    39247.000000 39093.9594  0.39%     -    0s
H    0     0                    39100.000000 39093.9594  0.02%     -    0s
     0     0 39096.4444    0    2 39100.0000 39096.4444  0.01%     -    0s

Cutting planes:
  Gomory: 1
  Flow cover: 5

Explored 0 nodes (1437 simplex iterations) in 0.19 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.910000000000e+04, best bound 3.909644444444e+04, gap 0.0091%