Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:44:42 2012

Optimize a model with 1606 rows, 81 columns and 3212 nonzeros
Presolve removed 1163 rows and 0 columns
Presolve time: 0.04s
Presolved: 443 rows, 81 columns, 2826 nonzeros
Variable types: 0 continuous, 81 integer (81 binary)
Found heuristic solution: objective 7.0000000

Root relaxation: objective 1.226517e+01, 275 iterations, 0.01 seconds

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

     0     0   12.26517    0   76    7.00000   12.26517  75.2%     -    0s
     0     0   11.98493    0   77    7.00000   11.98493  71.2%     -    0s
H    0     0                       8.0000000   11.98493  49.8%     -    0s
     0     0   11.89501    0   79    8.00000   11.89501  48.7%     -    0s
     0     0   11.85081    0   80    8.00000   11.85081  48.1%     -    0s
     0     0   11.84408    0   78    8.00000   11.84408  48.1%     -    0s
     0     0   11.84034    0   78    8.00000   11.84034  48.0%     -    0s
     0     0   11.83860    0   80    8.00000   11.83860  48.0%     -    0s
     0     0   11.83278    0   80    8.00000   11.83278  47.9%     -    0s
     0     0   11.83181    0   80    8.00000   11.83181  47.9%     -    0s
     0     0   11.82354    0   78    8.00000   11.82354  47.8%     -    0s
     0     0   11.82208    0   80    8.00000   11.82208  47.8%     -    0s
     0     0   11.82192    0   79    8.00000   11.82192  47.8%     -    0s
     0     0   11.82191    0   80    8.00000   11.82191  47.8%     -    0s
H    0     0                       9.0000000   11.82191  31.4%     -    0s
     0     2   11.81903    0   80    9.00000   11.81903  31.3%     -    0s

Cutting planes:
  Clique: 40
  Zero half: 6

Explored 31 nodes (2461 simplex iterations) in 0.61 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%