Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:42:50 2012

Optimize a model with 159 rows, 123 columns and 518 nonzeros
Presolve time: 0.00s
Presolved: 159 rows, 123 columns, 518 nonzeros
Variable types: 0 continuous, 123 integer (123 binary)
Found heuristic solution: objective 32.0000000

Root relaxation: objective 0.000000e+00, 68 iterations, 0.00 seconds

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

     0     0    0.00000    0   44   32.00000    0.00000   100%     -    0s
H    0     0                      27.0000000    0.00000   100%     -    0s
     0     0    0.81800    0   46   27.00000    0.81800  97.0%     -    0s
     0     0    0.86113    0   48   27.00000    0.86113  96.8%     -    0s
     0     0    0.87006    0   46   27.00000    0.87006  96.8%     -    0s
     0     0    0.87006    0   47   27.00000    0.87006  96.8%     -    0s
     0     0    0.87006    0   46   27.00000    0.87006  96.8%     -    0s
H    0     0                      23.0000000    0.87006  96.2%     -    0s
     0     2    0.89087    0   46   23.00000    0.89087  96.1%     -    0s
*   18    18              10      16.0000000    3.99093  75.1%  20.9    0s
*   21    15              13      15.0000000    3.99093  73.4%  18.7    0s

Cutting planes:
  Gomory: 1
  Mod-K: 4

Explored 237 nodes (3580 simplex iterations) in 0.09 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.500000000000e+01, best bound 1.500000000000e+01, gap 0.0%