Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:16:08 2013

Optimize a model with 520 rows, 4460 columns and 9500 nonzeros
Presolve removed 40 rows and 40 columns
Presolve time: 0.02s
Presolved: 480 rows, 4420 columns, 9360 nonzeros
Variable types: 4240 continuous, 180 integer (180 binary)

Root relaxation: objective 3.839329e+04, 420 iterations, 0.01 seconds

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

     0     0 38393.2919    0    2          - 38393.2919     -      -    0s
     0     0 38427.4503    0    3          - 38427.4503     -      -    0s
     0     0 38427.4503    0    3          - 38427.4503     -      -    0s
H    0     0                    38662.033233 38427.4503  0.61%     -    0s
     0     1 38465.2414    0    3 38662.0332 38465.2414  0.51%     -    0s
*   17     8              10    38645.657009 38587.1267  0.15%  20.4    0s
H   27     3                    38634.233867 38602.4483  0.08%  16.3    0s

Cutting planes:
  Gomory: 1
  Flow cover: 1

Explored 37 nodes (992 simplex iterations) in 0.23 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.863423386685e+04, best bound 3.863423386685e+04, gap 0.0%