Gurobi 5.0.1 (linux64) logging started Sat Dec  8 03:30:36 2012

Optimize a model with 1635 rows, 1620 columns and 5890 nonzeros
Presolve removed 209 rows and 76 columns
Presolve time: 0.02s
Presolved: 1426 rows, 1544 columns, 5427 nonzeros
Variable types: 1373 continuous, 171 integer (171 binary)

Root relaxation: objective 5.516225e+04, 233 iterations, 0.00 seconds

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

     0     0 55162.2500    0    1          - 55162.2500     -      -    0s
H    0     0                    55177.000000 55162.2500  0.03%     -    0s

Cutting planes:
  Gomory: 1
  Flow cover: 1

Explored 0 nodes (233 simplex iterations) in 0.03 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.517700000000e+04, best bound 5.517700000000e+04, gap 0.0%