Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:09:43 2012

Optimize a model with 75 rows, 73 columns and 258 nonzeros
Presolve removed 0 rows and 5 columns
Presolve time: 0.00s
Presolved: 75 rows, 68 columns, 253 nonzeros
Variable types: 0 continuous, 68 integer (67 binary)
Found heuristic solution: objective 10.0000000

Root relaxation: objective 0.000000e+00, 42 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   27   10.00000    0.00000   100%     -    0s
H    0     0                       9.0000000    0.00000   100%     -    0s
     0     0    0.32727    0   29    9.00000    0.32727  96.4%     -    0s
     0     0    0.81543    0   31    9.00000    0.81543  90.9%     -    0s
H    0     0                       6.0000000    0.81543  86.4%     -    0s
     0     0    0.81750    0   32    6.00000    0.81750  86.4%     -    0s
     0     0    0.81750    0   32    6.00000    0.81750  86.4%     -    0s
     0     2    0.81942    0   32    6.00000    0.81942  86.3%     -    0s
*   12     8               9       5.0000000    1.56973  68.6%  10.7    0s
*   15     4               7       4.0000000    1.56973  60.8%   9.1    0s

Cutting planes:
  Gomory: 3
  Zero half: 11

Explored 31 nodes (450 simplex iterations) in 0.03 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%