Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:55:49 2013

Optimize a model with 720 rows, 4860 columns and 10900 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.03s
Presolved: 700 rows, 4840 columns, 10480 nonzeros
Variable types: 4440 continuous, 400 integer (400 binary)

Root relaxation: objective 3.860476e+04, 481 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    6          - 38604.7615     -      -    0s
     0     0 38720.2497    0    6          - 38720.2497     -      -    0s
     0     0 38736.3653    0    6          - 38736.3653     -      -    0s
     0     0 38737.7176    0    6          - 38737.7176     -      -    0s
     0     0 38738.1024    0    6          - 38738.1024     -      -    0s
     0     0 38738.1175    0    6          - 38738.1175     -      -    0s
     0     0 38738.1175    0    6          - 38738.1175     -      -    0s
H    0     0                    39667.805279 38738.1175  2.34%     -    0s
     0     2 38738.1175    0    6 39667.8053 38738.1175  2.34%     -    0s
*   18     8               9    38860.951623 38845.7191  0.04%  34.6    0s
*   22     1               3    38860.914280 38852.0192  0.02%  29.6    0s

Cutting planes:
  Gomory: 2
  Implied bound: 21
  Flow cover: 5

Explored 24 nodes (1475 simplex iterations) in 0.24 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.886091427998e+04, best bound 3.886091427998e+04, gap 0.0%