Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:04 2012

Optimize a model with 152 rows, 83 columns and 304 nonzeros
Presolve removed 67 rows and 29 columns
Presolve time: 0.00s
Presolved: 85 rows, 54 columns, 170 nonzeros
Variable types: 0 continuous, 54 integer (54 binary)
Found heuristic solution: objective 38.0000000

Root relaxation: objective 4.100000e+01, 69 iterations, 0.00 seconds

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

     0     0   41.00000    0   54   38.00000   41.00000  7.89%     -    0s
     0     0   40.50000    0   54   38.00000   40.50000  6.58%     -    0s
H    0     0                      40.0000000   40.50000  1.25%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 4

Explored 0 nodes (136 simplex iterations) in 0.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.000000000000e+01, best bound 4.000000000000e+01, gap 0.0%