Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:02:49 2013

Optimize a model with 60 rows, 462 columns and 4136 nonzeros
Presolve removed 22 rows and 24 columns
Presolve time: 0.01s
Presolved: 38 rows, 438 columns, 3690 nonzeros
Variable types: 422 continuous, 16 integer (16 binary)

Root relaxation: objective 5.784077e+03, 13 iterations, 0.00 seconds

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

     0     0 5784.07688    0    3          - 5784.07688     -      -    0s
     0     0 5787.69761    0    3          - 5787.69761     -      -    0s
     0     0 5805.68582    0    6          - 5805.68582     -      -    0s
     0     0 5812.00664    0    3          - 5812.00664     -      -    0s
     0     0 5812.00664    0    3          - 5812.00664     -      -    0s
     0     0 5812.00664    0    2          - 5812.00664     -      -    0s
     0     0 5812.03050    0    4          - 5812.03050     -      -    0s
     0     0 5812.03681    0    5          - 5812.03681     -      -    0s
     0     0 5812.04122    0    5          - 5812.04122     -      -    0s
     0     0 5812.04122    0    5          - 5812.04122     -      -    0s
H    0     0                    5812.3255371 5812.04122  0.00%     -    0s

Cutting planes:
  Implied bound: 1
  Flow cover: 4

Explored 0 nodes (87 simplex iterations) in 0.10 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.812325537147e+03, best bound 5.812041220548e+03, gap 0.0049%