Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:23:01 2012

Optimize a model with 227 rows, 183 columns and 748 nonzeros
Presolve time: 0.00s
Presolved: 227 rows, 183 columns, 748 nonzeros
Variable types: 0 continuous, 183 integer (183 binary)
Found heuristic solution: objective 57.0000000

Root relaxation: objective 0.000000e+00, 100 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   70   57.00000    0.00000   100%     -    0s
H    0     0                      29.0000000    0.00000   100%     -    0s
     0     0    0.54687    0   71   29.00000    0.54687  98.1%     -    0s
H    0     0                      23.0000000    0.54687  97.6%     -    0s
     0     0    1.08326    0   73   23.00000    1.08326  95.3%     -    0s
     0     0    1.58144    0   75   23.00000    1.58144  93.1%     -    0s
H    0     0                      22.0000000    1.58144  92.8%     -    0s
     0     0    1.58830    0   76   22.00000    1.58830  92.8%     -    0s
H    0     0                      18.0000000    1.58830  91.2%     -    0s
     0     2    1.59775    0   76   18.00000    1.59775  91.1%     -    0s
*   29    21              18      17.0000000    3.33352  80.4%  22.0    0s
*  239    60               8      15.0000000    8.77127  41.5%  20.0    0s

Cutting planes:
  Gomory: 4
  Zero half: 4

Explored 477 nodes (8597 simplex iterations) in 0.32 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%