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

Optimize a model with 169 rows, 85 columns and 338 nonzeros
Presolve removed 61 rows and 24 columns
Presolve time: 0.00s
Presolved: 108 rows, 61 columns, 218 nonzeros
Variable types: 0 continuous, 61 integer (61 binary)
Found heuristic solution: objective 39.0000000

Root relaxation: objective 4.150000e+01, 84 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   41   39.00000   41.50000  6.41%     -    0s
H    0     0                      40.0000000   41.50000  3.75%     -    0s
     0     0 infeasible    0        40.00000   40.99996  2.50%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 5

Explored 0 nodes (124 simplex iterations) in 0.00 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%