Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:55:08 2013

Optimize a model with 22151 rows, 2601 columns and 67626 nonzeros
Presolve removed 3376 rows and 1351 columns
Presolve time: 0.17s
Presolved: 18775 rows, 1250 columns, 57279 nonzeros
Variable types: 20 continuous, 1230 integer (1230 binary)
Found heuristic solution: objective 51913.000000

Root relaxation: objective 3.945921e+04, 5874 iterations, 0.33 seconds

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

     0     0 39459.2143    0    8 51913.0000 39459.2143  24.0%     -    0s
H    0     0                    39467.000000 39459.2143  0.02%     -    0s
H    0     0                    39465.000000 39459.2143  0.01%     -    0s
     0     0 39459.3538    0   24 39465.0000 39459.3538  0.01%     -    0s
     0     0 39459.3538    0    7 39465.0000 39459.3538  0.01%     -    0s
     0     0 39459.4284    0   26 39465.0000 39459.4284  0.01%     -    0s
     0     0 39459.7750    0   24 39465.0000 39459.7750  0.01%     -    0s
     0     2 39459.8689    0   24 39465.0000 39459.8689  0.01%     -    0s

Cutting planes:
  Gomory: 4
  Cover: 1
  Implied bound: 1
  MIR: 17
  Zero half: 4

Explored 76 nodes (6736 simplex iterations) in 0.78 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.946500000000e+04, best bound 3.946200000000e+04, gap 0.0076%