Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:07 2012

Optimize a model with 237 rows, 92 columns and 474 nonzeros
Presolve removed 58 rows and 7 columns
Presolve time: 0.00s
Presolved: 179 rows, 85 columns, 382 nonzeros
Variable types: 0 continuous, 85 integer (85 binary)
Found heuristic solution: objective 35.0000000

Root relaxation: objective 4.060000e+01, 128 iterations, 0.00 seconds

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

     0     0   40.60000    0   80   35.00000   40.60000  16.0%     -    0s
H    0     0                      36.0000000   40.60000  12.8%     -    0s
H    0     0                      38.0000000   40.60000  6.84%     -    0s
     0     0   39.66667    0   77   38.00000   39.66667  4.39%     -    0s
     0     0   39.33333    0   64   38.00000   39.33333  3.51%     -    0s
     0     0   39.00000    0   77   38.00000   39.00000  2.63%     -    0s
     0     0     cutoff    0        38.00000   38.99996  2.63%     -    0s

Cutting planes:
  Zero half: 40

Explored 0 nodes (273 simplex iterations) in 0.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.800000000000e+01, best bound 3.800000000000e+01, gap 0.0%