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

Optimize a model with 188 rows, 91 columns and 376 nonzeros
Presolve removed 63 rows and 21 columns
Presolve time: 0.00s
Presolved: 125 rows, 70 columns, 262 nonzeros
Variable types: 0 continuous, 70 integer (70 binary)
Found heuristic solution: objective 39.0000000

Root relaxation: objective 4.350000e+01, 81 iterations, 0.00 seconds

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

     0     0   43.50000    0   61   39.00000   43.50000  11.5%     -    0s
H    0     0                      40.0000000   43.50000  8.75%     -    0s
H    0     0                      41.0000000   43.50000  6.10%     -    0s
     0     0   42.00000    0   65   41.00000   42.00000  2.44%     -    0s
     0     0     cutoff    0        41.00000   41.99996  2.44%     -    0s

Cutting planes:
  Gomory: 2
  Zero half: 20

Explored 0 nodes (181 simplex iterations) in 0.01 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%