Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:52:28 2012

Optimize a model with 85 rows, 56 columns and 266 nonzeros
Presolve time: 0.00s
Presolved: 85 rows, 56 columns, 266 nonzeros
Variable types: 0 continuous, 56 integer (56 binary)
Found heuristic solution: objective 22.0000000

Root relaxation: objective 0.000000e+00, 23 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   14   22.00000    0.00000   100%     -    0s
H    0     0                      19.0000000    0.00000   100%     -    0s
     0     0    0.75000    0   16   19.00000    0.75000  96.1%     -    0s
     0     0    0.83333    0   16   19.00000    0.83333  95.6%     -    0s
     0     0    1.00000    0   16   19.00000    1.00000  94.7%     -    0s
     0     0    1.00000    0   18   19.00000    1.00000  94.7%     -    0s
     0     0    1.08333    0   16   19.00000    1.08333  94.3%     -    0s
     0     0    1.08333    0   16   19.00000    1.08333  94.3%     -    0s
     0     0    1.08333    0   16   19.00000    1.08333  94.3%     -    0s
     0     2    1.08333    0   16   19.00000    1.08333  94.3%     -    0s
*   34    18               7      18.0000000    4.33333  75.9%  11.5    0s
*   37    17               7      16.0000000    4.33333  72.9%  10.9    0s
*  128    10               7      15.0000000   11.83333  21.1%   8.4    0s

Cutting planes:
  Gomory: 1
  Zero half: 4

Explored 149 nodes (1263 simplex iterations) in 0.03 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%