Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:38:33 2012

Optimize a model with 87 rows, 73 columns and 288 nonzeros
Presolve time: 0.00s
Presolved: 87 rows, 73 columns, 288 nonzeros
Variable types: 0 continuous, 73 integer (73 binary)
Found heuristic solution: objective 18.0000000

Root relaxation: objective 0.000000e+00, 41 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   30   18.00000    0.00000   100%     -    0s
H    0     0                      15.0000000    0.00000   100%     -    0s
H    0     0                      14.0000000    0.00000   100%     -    0s
H    0     0                      11.0000000    0.00000   100%     -    0s
H    0     0                       8.0000000    0.00000   100%     -    0s
     0     0    0.66667    0   32    8.00000    0.66667  91.7%     -    0s
     0     0    0.86364    0   33    8.00000    0.86364  89.2%     -    0s
     0     0    0.86471    0   34    8.00000    0.86471  89.2%     -    0s
     0     2    0.87660    0   34    8.00000    0.87660  89.0%     -    0s
*    8     8               5       7.0000000    2.72727  61.0%  15.0    0s

Cutting planes:
  Gomory: 1
  Zero half: 2
  Mod-K: 1

Explored 49 nodes (609 simplex iterations) in 0.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.000000000000e+00, best bound 7.000000000000e+00, gap 0.0%