Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:02:48 2013

Optimize a model with 60 rows, 462 columns and 4136 nonzeros
Presolve removed 22 rows and 23 columns
Presolve time: 0.01s
Presolved: 38 rows, 439 columns, 3692 nonzeros
Variable types: 423 continuous, 16 integer (16 binary)

Root relaxation: objective 5.737611e+03, 15 iterations, 0.00 seconds

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

     0     0 5737.61109    0    3          - 5737.61109     -      -    0s
     0     0 5739.78122    0    3          - 5739.78122     -      -    0s
     0     0 5753.16675    0    3          - 5753.16675     -      -    0s
     0     0 5753.91288    0    1          - 5753.91288     -      -    0s
     0     0 5753.91288    0    1          - 5753.91288     -      -    0s
H    0     0                    5753.9375648 5753.91288  0.00%     -    0s

Cutting planes:
  Flow cover: 1

Explored 0 nodes (48 simplex iterations) in 0.04 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.753937564786e+03, best bound 5.753912882395e+03, gap 0.0004%