Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:06 2012

Optimize a model with 219 rows, 89 columns and 438 nonzeros
Presolve removed 65 rows and 13 columns
Presolve time: 0.00s
Presolved: 154 rows, 76 columns, 324 nonzeros
Variable types: 0 continuous, 76 integer (76 binary)
Found heuristic solution: objective 36.0000000

Root relaxation: objective 4.150000e+01, 98 iterations, 0.00 seconds

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

     0     0   41.50000    0   61   36.00000   41.50000  15.3%     -    0s
     0     0   40.25000    0   67   36.00000   40.25000  11.8%     -    0s
     0     0   40.16667    0   71   36.00000   40.16667  11.6%     -    0s
H    0     0                      39.0000000   40.16667  2.99%     -    0s
     0     0     cutoff    0        39.00000   39.99996  2.56%     -    0s

Cutting planes:
  Gomory: 2
  Zero half: 54

Explored 0 nodes (226 simplex iterations) in 0.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.900000000000e+01, best bound 3.900000000000e+01, gap 0.0%