Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:50:15 2013

Optimize a model with 2320 rows, 8060 columns and 22100 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.16s
Presolved: 2300 rows, 8040 columns, 20080 nonzeros
Variable types: 6040 continuous, 2000 integer (2000 binary)

Root relaxation: objective 3.839329e+04, 593 iterations, 0.02 seconds

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

     0     0 38393.2919    0    4          - 38393.2919     -      -    0s
     0     0 38500.0424    0    6          - 38500.0424     -      -    0s
     0     0 38511.5340    0    4          - 38511.5340     -      -    0s
     0     0 38512.4579    0    4          - 38512.4579     -      -    0s
     0     0 38512.4579    0    4          - 38512.4579     -      -    0s
H    0     0                    38665.596645 38512.4579  0.40%     -    0s
     0     2 38513.1285    0    4 38665.5966 38513.1285  0.39%     -    0s
H   54     2                    38636.223163 38634.3033  0.00%  12.4    0s

Cutting planes:
  Gomory: 3
  Implied bound: 11
  Flow cover: 1

Explored 54 nodes (1499 simplex iterations) in 0.92 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.863622316281e+04, best bound 3.863430333985e+04, gap 0.0050%