Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:44:52 2012

Optimize a model with 1668 rows, 82 columns and 3336 nonzeros
Presolve removed 1160 rows and 0 columns
Presolve time: 0.04s
Presolved: 508 rows, 82 columns, 3306 nonzeros
Variable types: 0 continuous, 82 integer (82 binary)
Found heuristic solution: objective 8.0000000

Root relaxation: objective 1.236341e+01, 290 iterations, 0.01 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0   12.36341    0   77    8.00000   12.36341  54.5%     -    0s
     0     0   11.93557    0   82    8.00000   11.93557  49.2%     -    0s
     0     0   11.83644    0   81    8.00000   11.83644  48.0%     -    0s
     0     0   11.82033    0   81    8.00000   11.82033  47.8%     -    0s
     0     0   11.81527    0   81    8.00000   11.81527  47.7%     -    0s
     0     0   11.81519    0   81    8.00000   11.81519  47.7%     -    0s
     0     0   11.81514    0   81    8.00000   11.81514  47.7%     -    0s
     0     2   11.81169    0   81    8.00000   11.81169  47.6%     -    0s
H   26    15                       9.0000000   11.62542  29.2%  55.2    0s

Cutting planes:
  Clique: 36
  Zero half: 2

Explored 46 nodes (3007 simplex iterations) in 0.53 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 9.000000000000e+00, best bound 9.000000000000e+00, gap 0.0%