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

Optimize a model with 182 rows, 86 columns and 364 nonzeros
Presolve removed 51 rows and 14 columns
Presolve time: 0.00s
Presolved: 131 rows, 72 columns, 270 nonzeros
Variable types: 0 continuous, 72 integer (72 binary)
Found heuristic solution: objective 36.0000000

Root relaxation: objective 4.150000e+01, 87 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   67   36.00000   41.50000  15.3%     -    0s
H    0     0                      37.0000000   41.50000  12.2%     -    0s
     0     0   40.50000    0   65   37.00000   40.50000  9.46%     -    0s
H    0     0                      38.0000000   40.50000  6.58%     -    0s
     0     0   40.00000    0   67   38.00000   40.00000  5.26%     -    0s
     0     0   39.50000    0   46   38.00000   39.50000  3.95%     -    0s
     0     0   39.36842    0   66   38.00000   39.36842  3.60%     -    0s
     0     0   39.25000    0   71   38.00000   39.25000  3.29%     -    0s
     0     0   39.25000    0   71   38.00000   39.25000  3.29%     -    0s
     0     0   39.25000    0   69   38.00000   39.25000  3.29%     -    0s
     0     2   39.25000    0   67   38.00000   39.25000  3.29%     -    0s

Cutting planes:
  Zero half: 16

Explored 19 nodes (385 simplex iterations) in 0.03 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%