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

Optimize a model with 177 rows, 88 columns and 354 nonzeros
Presolve removed 51 rows and 16 columns
Presolve time: 0.00s
Presolved: 126 rows, 72 columns, 258 nonzeros
Variable types: 0 continuous, 72 integer (72 binary)
Found heuristic solution: objective 36.0000000

Root relaxation: objective 4.250000e+01, 89 iterations, 0.00 seconds

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

     0     0   42.50000    0   61   36.00000   42.50000  18.1%     -    0s
H    0     0                      39.0000000   42.50000  8.97%     -    0s
     0     0   42.00000    0   68   39.00000   42.00000  7.69%     -    0s
H    0     0                      40.0000000   42.00000  5.00%     -    0s
     0     0   41.66667    0   71   40.00000   41.66667  4.17%     -    0s
     0     0   41.33333    0   63   40.00000   41.33333  3.33%     -    0s
H    0     0                      41.0000000   41.33333  0.81%     -    0s

Cutting planes:
  Zero half: 12

Explored 0 nodes (204 simplex iterations) in 0.02 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%