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

Optimize a model with 221 rows, 90 columns and 442 nonzeros
Presolve removed 51 rows and 9 columns
Presolve time: 0.00s
Presolved: 170 rows, 81 columns, 350 nonzeros
Variable types: 0 continuous, 81 integer (81 binary)
Found heuristic solution: objective 36.0000000

Root relaxation: objective 4.200000e+01, 101 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   62   36.00000   42.00000  16.7%     -    0s
H    0     0                      37.0000000   42.00000  13.5%     -    0s
     0     0   41.00000    0   70   37.00000   41.00000  10.8%     -    0s
H    0     0                      38.0000000   41.00000  7.89%     -    0s
     0     0   40.50000    0   61   38.00000   40.50000  6.58%     -    0s
     0     0   40.45455    0   73   38.00000   40.45455  6.46%     -    0s
H    0     0                      39.0000000   40.45455  3.73%     -    0s
     0     0   40.00000    0   73   39.00000   40.00000  2.56%     -    0s
*    0     0               0      40.0000000   40.00000   0.0%     -    0s

Cutting planes:
  Zero half: 27

Explored 0 nodes (260 simplex iterations) in 0.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.000000000000e+01, best bound 4.000000000000e+01, gap 0.0%