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 801 rows and 0 columns
Presolve time: 0.05s
Presolved: 8529 rows, 9030 columns, 34428 nonzeros
Variable types: 9000 continuous, 30 integer (30 binary)

Root relaxation: objective 2.878878e+04, 1029 iterations, 0.05 seconds

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

     0     0 28788.7778    0    2          - 28788.7778     -      -    0s
H    0     0                    28848.000000 28788.7778  0.21%     -    0s
H    0     0                    28792.000000 28788.7778  0.01%     -    0s
     0     0     cutoff    0      28792.0000 28792.0000   0.0%     -    0s

Cutting planes:
  Flow cover: 4

Explored 0 nodes (1030 simplex iterations) in 0.18 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.879200000000e+04, best bound 2.879200000000e+04, gap 0.0%