Gurobi 5.0.1 (linux64) logging started Fri Jan 18 07:44:58 2013

Optimize a model with 20320 rows, 44060 columns and 148100 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.41s
Presolved: 20300 rows, 44040 columns, 128080 nonzeros
Variable types: 24040 continuous, 20000 integer (20000 binary)

Root relaxation: objective 3.839329e+04, 613 iterations, 0.05 seconds

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

     0     0 38393.2919    0    4          - 38393.2919     -      -    1s
     0     0 38468.0129    0    7          - 38468.0129     -      -    1s
     0     0 38478.0724    0    6          - 38478.0724     -      -    2s
     0     0 38478.1184    0    6          - 38478.1184     -      -    2s
     0     0 38478.1184    0    6          - 38478.1184     -      -    2s
     0     2 38478.1184    0    6          - 38478.1184     -      -    5s
*   34     6              17    38634.722008 38634.7220   0.0%  36.9    6s

Cutting planes:
  Gomory: 2
  Implied bound: 8
  Flow cover: 1

Explored 35 nodes (2144 simplex iterations) in 6.42 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.863472200806e+04, best bound 3.863472200806e+04, gap 0.0%