Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:55:44 2013

Optimize a model with 480 rows, 5420 columns and 14620 nonzeros
Presolve removed 20 rows and 500 columns
Presolve time: 0.01s
Presolved: 460 rows, 4920 columns, 13820 nonzeros
Variable types: 4820 continuous, 100 integer (100 binary)

Root relaxation: objective 3.860476e+04, 516 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    9          - 38604.7615     -      -    0s
     0     0 38633.5578    0    9          - 38633.5578     -      -    0s
     0     0 38635.3607    0    9          - 38635.3607     -      -    0s
     0     0 38636.5095    0    9          - 38636.5095     -      -    0s
     0     0 38636.9260    0    9          - 38636.9260     -      -    0s
     0     0 38637.2098    0    9          - 38637.2098     -      -    0s
     0     0 38637.3601    0    9          - 38637.3601     -      -    0s
     0     0 38637.4734    0    9          - 38637.4734     -      -    0s
     0     0 38637.5075    0    9          - 38637.5075     -      -    0s
     0     0 38637.5075    0    9          - 38637.5075     -      -    0s
     0     2 38638.6613    0    9          - 38638.6613     -      -    0s
*   15     7              12    38860.951623 38667.6755  0.50%  18.3    0s
*   24     4               6    38860.914280 38674.8614  0.48%  15.3    0s

Cutting planes:
  Flow cover: 9

Explored 34 nodes (1223 simplex iterations) in 0.34 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.886091427998e+04, best bound 3.886072889091e+04, gap 0.0005%