Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:30 2012

Optimize a model with 889 rows, 60 columns and 1778 nonzeros
Presolve removed 617 rows and 0 columns
Presolve time: 0.02s
Presolved: 272 rows, 60 columns, 1651 nonzeros
Variable types: 0 continuous, 60 integer (60 binary)
Found heuristic solution: objective 6.0000000

Root relaxation: objective 1.038436e+01, 148 iterations, 0.00 seconds

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

     0     0   10.38436    0   52    6.00000   10.38436  73.1%     -    0s
H    0     0                       8.0000000   10.38436  29.8%     -    0s
     0     0   10.06166    0   56    8.00000   10.06166  25.8%     -    0s
     0     0    9.98829    0   56    8.00000    9.98829  24.9%     -    0s
     0     0    9.93821    0   57    8.00000    9.93821  24.2%     -    0s
     0     0    9.93087    0   59    8.00000    9.93087  24.1%     -    0s
     0     0    9.89874    0   56    8.00000    9.89874  23.7%     -    0s
     0     0    9.88977    0   58    8.00000    9.88977  23.6%     -    0s
     0     0    9.88970    0   58    8.00000    9.88970  23.6%     -    0s
     0     2    9.88883    0   58    8.00000    9.88883  23.6%     -    0s

Cutting planes:
  Clique: 27
  Zero half: 6

Explored 13 nodes (746 simplex iterations) in 0.14 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%