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

Optimize a model with 228 rows, 90 columns and 456 nonzeros
Presolve removed 61 rows and 8 columns
Presolve time: 0.00s
Presolved: 167 rows, 82 columns, 358 nonzeros
Variable types: 0 continuous, 82 integer (82 binary)
Found heuristic solution: objective 35.0000000

Root relaxation: objective 4.050000e+01, 114 iterations, 0.00 seconds

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

     0     0   40.50000    0   67   35.00000   40.50000  15.7%     -    0s
     0     0   39.66667    0   78   35.00000   39.66667  13.3%     -    0s
H    0     0                      37.0000000   39.66667  7.21%     -    0s
     0     0   39.60000    0   80   37.00000   39.60000  7.03%     -    0s
     0     0   39.16667    0   80   37.00000   39.16667  5.86%     -    0s
     0     0   38.50000    0   79   37.00000   38.50000  4.05%     -    0s
     0     0   38.50000    0   77   37.00000   38.50000  4.05%     -    0s
     0     0   38.50000    0   67   37.00000   38.50000  4.05%     -    0s
H    0     0                      38.0000000   38.50000  1.32%     -    0s

Cutting planes:
  Zero half: 19

Explored 0 nodes (336 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%