Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:51:55 2013

Optimize a model with 4641 rows, 4431 columns and 17661 nonzeros
Presolve removed 355 rows and 0 columns
Presolve time: 0.03s
Presolved: 4286 rows, 4431 columns, 16951 nonzeros
Variable types: 4410 continuous, 21 integer (21 binary)

Root relaxation: objective 1.982486e+04, 484 iterations, 0.01 seconds

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

     0     0 19824.8571    0    1          - 19824.8571     -      -    0s
H    0     0                    19832.000000 19824.8571  0.04%     -    0s
     0     0 19825.8894    0    3 19832.0000 19825.8894  0.03%     -    0s
*    0     0               0    19826.000000 19826.0000   0.0%     -    0s

Cutting planes:
  Gomory: 1
  Flow cover: 6

Explored 0 nodes (505 simplex iterations) in 0.08 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.982600000000e+04, best bound 1.982600000000e+04, gap 0.0%