Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:44:43 2012

Optimize a model with 1649 rows, 81 columns and 3298 nonzeros
Presolve removed 1156 rows and 0 columns
Presolve time: 0.04s
Presolved: 493 rows, 81 columns, 3240 nonzeros
Variable types: 0 continuous, 81 integer (81 binary)
Found heuristic solution: objective 8.0000000

Root relaxation: objective 1.218901e+01, 235 iterations, 0.01 seconds

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

     0     0   12.18901    0   69    8.00000   12.18901  52.4%     -    0s
     0     0   11.79974    0   79    8.00000   11.79974  47.5%     -    0s
     0     0   11.76424    0   78    8.00000   11.76424  47.1%     -    0s
     0     0   11.74206    0   77    8.00000   11.74206  46.8%     -    0s
     0     0   11.72724    0   78    8.00000   11.72724  46.6%     -    0s
     0     0   11.72498    0   78    8.00000   11.72498  46.6%     -    0s
     0     0   11.72431    0   79    8.00000   11.72431  46.6%     -    0s
     0     2   11.72404    0   79    8.00000   11.72404  46.6%     -    0s

Cutting planes:
  Clique: 52
  Zero half: 5

Explored 78 nodes (4134 simplex iterations) in 0.48 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0%