Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:39:49 2012

Optimize a model with 155 rows, 115 columns and 500 nonzeros
Presolve time: 0.00s
Presolved: 155 rows, 115 columns, 500 nonzeros
Variable types: 0 continuous, 115 integer (115 binary)
Found heuristic solution: objective 24.0000000

Root relaxation: objective 0.000000e+00, 62 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   38   24.00000    0.00000   100%     -    0s
H    0     0                      23.0000000    0.00000   100%     -    0s
     0     0    0.63158    0   40   23.00000    0.63158  97.3%     -    0s
H    0     0                      20.0000000    0.63158  96.8%     -    0s
     0     0    0.80702    0   40   20.00000    0.80702  96.0%     -    0s
     0     0    0.80702    0   40   20.00000    0.80702  96.0%     -    0s
     0     0    0.80702    0   40   20.00000    0.80702  96.0%     -    0s
     0     2    0.83528    0   40   20.00000    0.83528  95.8%     -    0s
*   25    17              16      19.0000000    4.67599  75.4%  17.9    0s
*   45    25              16      17.0000000    4.74561  72.1%  15.6    0s
*  156    16               7      15.0000000   11.34615  24.4%  15.0    0s

Cutting planes:
  Gomory: 1
  Zero half: 3

Explored 181 nodes (2817 simplex iterations) in 0.10 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%