Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:08 2012

Optimize a model with 228 rows, 98 columns and 456 nonzeros
Presolve removed 37 rows and 6 columns
Presolve time: 0.00s
Presolved: 191 rows, 92 columns, 394 nonzeros
Variable types: 0 continuous, 92 integer (92 binary)
Found heuristic solution: objective 38.0000000

Root relaxation: objective 4.550000e+01, 112 iterations, 0.00 seconds

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

     0     0   45.50000    0   71   38.00000   45.50000  19.7%     -    0s
     0     0   44.50000    0   65   38.00000   44.50000  17.1%     -    0s
     0     0   44.50000    0   69   38.00000   44.50000  17.1%     -    0s
     0     0   43.60000    0   87   38.00000   43.60000  14.7%     -    0s
H    0     0                      40.0000000   43.60000  9.00%     -    0s
     0     0   43.41667    0   84   40.00000   43.41667  8.54%     -    0s
H    0     0                      41.0000000   43.41667  5.89%     -    0s
     0     0   42.83333    0   86   41.00000   42.83333  4.47%     -    0s
     0     0   42.71429    0   71   41.00000   42.71429  4.18%     -    0s
     0     0   42.62500    0   90   41.00000   42.62500  3.96%     -    0s
     0     0   42.55000    0   85   41.00000   42.55000  3.78%     -    0s
     0     0   42.45833    0   89   41.00000   42.45833  3.56%     -    0s
     0     0   42.44444    0   91   41.00000   42.44444  3.52%     -    0s
     0     0   42.44444    0   88   41.00000   42.44444  3.52%     -    0s
     0     2   42.44444    0   87   41.00000   42.44444  3.52%     -    0s

Cutting planes:
  Zero half: 52

Explored 28 nodes (929 simplex iterations) in 0.05 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.100000000000e+01, best bound 4.100000000000e+01, gap 0.0%