Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:37 2012

Optimize a model with 105 rows, 45 columns and 210 nonzeros
Presolve removed 29 rows and 5 columns
Presolve time: 0.00s
Presolved: 76 rows, 40 columns, 161 nonzeros
Variable types: 0 continuous, 40 integer (40 binary)
Found heuristic solution: objective 17.0000000

Root relaxation: objective 2.000000e+01, 45 iterations, 0.00 seconds

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

     0     0   20.00000    0   36   17.00000   20.00000  17.6%     -    0s
     0     0   19.40000    0   38   17.00000   19.40000  14.1%     -    0s
H    0     0                      18.0000000   19.40000  7.78%     -    0s
     0     0   19.00000    0   40   18.00000   19.00000  5.56%     -    0s
     0     0   19.00000    0   40   18.00000   19.00000  5.56%     -    0s
     0     0   19.00000    0   33   18.00000   19.00000  5.56%     -    0s
     0     2   19.00000    0   33   18.00000   19.00000  5.56%     -    0s

Cutting planes:
  Zero half: 5

Explored 1 nodes (171 simplex iterations) in 0.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.800000000000e+01, best bound 1.800000000000e+01, gap 0.0%