Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:15:50 2013

Optimize a model with 680 rows, 4440 columns and 9620 nonzeros
Presolve removed 80 rows and 60 columns
Presolve time: 0.02s
Presolved: 600 rows, 4380 columns, 9300 nonzeros
Variable types: 4200 continuous, 180 integer (180 binary)

Root relaxation: objective 3.839329e+04, 529 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 38507.6446    0    2          - 38507.6446     -      -    0s
     0     0 38515.0163    0    3          - 38515.0163     -      -    0s
     0     0 38515.3498    0    2          - 38515.3498     -      -    0s
H    0     0                    38662.033233 38515.3498  0.38%     -    0s
     0     2 38547.9582    0    1 38662.0332 38547.9582  0.30%     -    0s
H   16     7                    38656.685099 38606.0554  0.13%  12.9    0s
*   19     8              10    38645.657009 38606.0554  0.10%  12.3    0s
H   21     6                    38637.841010 38606.0554  0.08%  11.1    0s
*   26     5               8    38634.233867 38613.0134  0.05%  10.2    0s

Cutting planes:
  Gomory: 5

Explored 31 nodes (847 simplex iterations) in 0.21 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.863423386685e+04, best bound 3.863158111485e+04, gap 0.0069%