Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:46:20 2013

Optimize a model with 56 rows, 260 columns and 1930 nonzeros
Presolve removed 22 rows and 23 columns
Presolve time: 0.00s
Presolved: 34 rows, 237 columns, 1686 nonzeros
Variable types: 223 continuous, 14 integer (14 binary)

Root relaxation: objective 7.444602e+03, 12 iterations, 0.00 seconds

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

     0     0 7444.60178    0    3          - 7444.60178     -      -    0s
     0     0 7447.30919    0    4          - 7447.30919     -      -    0s
     0     0 7457.64293    0    3          - 7457.64293     -      -    0s
     0     0 7459.10732    0    1          - 7459.10732     -      -    0s
H    0     0                    7459.1516945 7459.10732  0.00%     -    0s

Cutting planes:
  Flow cover: 1

Explored 0 nodes (35 simplex iterations) in 0.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.459151694455e+03, best bound 7.459107322065e+03, gap 0.0006%