Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:45:28 2012

Optimize a model with 1898 rows, 87 columns and 3796 nonzeros
Presolve removed 1330 rows and 0 columns
Presolve time: 0.05s
Presolved: 568 rows, 87 columns, 3713 nonzeros
Variable types: 0 continuous, 87 integer (87 binary)
Found heuristic solution: objective 6.0000000

Root relaxation: objective 1.271702e+01, 391 iterations, 0.01 seconds

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

     0     0   12.71702    0   85    6.00000   12.71702   112%     -    0s
H    0     0                       7.0000000   12.71702  81.7%     -    0s
     0     0   12.45120    0   84    7.00000   12.45120  77.9%     -    0s
H    0     0                       8.0000000   12.45120  55.6%     -    0s
     0     0   12.37220    0   84    8.00000   12.37220  54.7%     -    0s
     0     0   12.34632    0   87    8.00000   12.34632  54.3%     -    0s
     0     0   12.32597    0   87    8.00000   12.32597  54.1%     -    0s
     0     0   12.32101    0   87    8.00000   12.32101  54.0%     -    0s
     0     0   12.31845    0   87    8.00000   12.31845  54.0%     -    0s
     0     0   12.31765    0   87    8.00000   12.31765  54.0%     -    0s
     0     0   12.31728    0   87    8.00000   12.31728  54.0%     -    0s
     0     0   12.31718    0   87    8.00000   12.31718  54.0%     -    0s
     0     2   12.31484    0   87    8.00000   12.31484  53.9%     -    0s
*  121     4               3       9.0000000   10.20988  13.4%  45.9    1s

Cutting planes:
  Clique: 49
  Zero half: 1

Explored 126 nodes (6261 simplex iterations) in 1.05 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%