Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:05 2012

Optimize a model with 175 rows, 87 columns and 350 nonzeros
Presolve removed 46 rows and 16 columns
Presolve time: 0.00s
Presolved: 129 rows, 71 columns, 266 nonzeros
Variable types: 0 continuous, 71 integer (71 binary)
Found heuristic solution: objective 36.0000000

Root relaxation: objective 4.200000e+01, 88 iterations, 0.00 seconds

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

     0     0   42.00000    0   68   36.00000   42.00000  16.7%     -    0s
H    0     0                      37.0000000   42.00000  13.5%     -    0s
     0     0   40.71429    0   70   37.00000   40.71429  10.0%     -    0s
H    0     0                      38.0000000   40.71429  7.14%     -    0s
     0     0   40.42857    0   68   38.00000   40.42857  6.39%     -    0s
H    0     0                      39.0000000   40.42857  3.66%     -    0s
     0     0     cutoff    0        39.00000   39.99996  2.56%     -    0s

Cutting planes:
  Gomory: 2
  Zero half: 37

Explored 0 nodes (197 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%