Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:15:53 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 3.860476e+04, 606 iterations, 0.01 seconds

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

     0     0 38604.7615    0    3          - 38604.7615     -      -    0s
     0     0 38692.6238    0    3          - 38692.6238     -      -    0s
     0     0 38729.0619    0    3          - 38729.0619     -      -    0s
     0     0 38735.0407    0    3          - 38735.0407     -      -    0s
H    0     0                    39165.291803 38735.0407  1.10%     -    0s
     0     2 38767.6349    0    3 39165.2918 38767.6349  1.02%     -    0s
H    5     5                    38909.381075 38810.0887  0.26%  27.8    0s
H    6     4                    38879.191638 38810.0887  0.18%  25.8    0s
*    7     3               6    38860.427834 38810.0887  0.13%  24.1    0s

Cutting planes:
  Gomory: 6

Explored 15 nodes (1019 simplex iterations) in 0.28 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.886042783404e+04, best bound 3.886042783404e+04, gap 0.0%