Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:39:04 2012

Optimize a model with 127 rows, 97 columns and 412 nonzeros
Presolve time: 0.00s
Presolved: 127 rows, 97 columns, 412 nonzeros
Variable types: 0 continuous, 97 integer (97 binary)
Found heuristic solution: objective 31.0000000

Root relaxation: objective 0.000000e+00, 48 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   34   31.00000    0.00000   100%     -    0s
H    0     0                      20.0000000    0.00000   100%     -    0s
     0     0    0.77273    0   35   20.00000    0.77273  96.1%     -    0s
     0     0    1.24575    0   39   20.00000    1.24575  93.8%     -    0s
H    0     0                      18.0000000    1.24575  93.1%     -    0s
     0     0    1.25187    0   39   18.00000    1.25187  93.0%     -    0s
     0     0    1.25187    0   39   18.00000    1.25187  93.0%     -    0s
     0     2    1.25187    0   39   18.00000    1.25187  93.0%     -    0s
*   14    12              10      15.0000000    5.37658  64.2%  23.3    0s
*   37    16              11      13.0000000    7.57876  41.7%  17.7    0s

Cutting planes:
  Gomory: 3
  Zero half: 2

Explored 57 nodes (1172 simplex iterations) in 0.06 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.300000000000e+01, best bound 1.300000000000e+01, gap 0.0%