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

Optimize a model with 194 rows, 91 columns and 388 nonzeros
Presolve removed 71 rows and 22 columns
Presolve time: 0.00s
Presolved: 123 rows, 69 columns, 257 nonzeros
Variable types: 0 continuous, 69 integer (69 binary)
Found heuristic solution: objective 37.0000000

Root relaxation: objective 4.350000e+01, 88 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   57   37.00000   43.50000  17.6%     -    0s
H    0     0                      42.0000000   43.50000  3.57%     -    0s
     0     0     cutoff    0        42.00000   42.99996  2.38%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 20

Explored 0 nodes (132 simplex iterations) in 0.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.200000000000e+01, best bound 4.200000000000e+01, gap 0.0%