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

Optimize a model with 235 rows, 91 columns and 470 nonzeros
Presolve removed 55 rows and 5 columns
Presolve time: 0.00s
Presolved: 180 rows, 86 columns, 384 nonzeros
Variable types: 0 continuous, 86 integer (86 binary)
Found heuristic solution: objective 32.0000000

Root relaxation: objective 4.100000e+01, 107 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   70   32.00000   41.00000  28.1%     -    0s
H    0     0                      36.0000000   41.00000  13.9%     -    0s
     0     0   40.00000    0   60   36.00000   40.00000  11.1%     -    0s
     0     0   39.73684    0   81   36.00000   39.73684  10.4%     -    0s
     0     0   39.23333    0   82   36.00000   39.23333  8.98%     -    0s
H    0     0                      37.0000000   39.23333  6.04%     -    0s
H    0     0                      38.0000000   39.23333  3.25%     -    0s
     0     0   39.12500    0   72   38.00000   39.12500  2.96%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 28

Explored 0 nodes (268 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%