Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:24 2012

Optimize a model with 768 rows, 56 columns and 1536 nonzeros
Presolve removed 536 rows and 0 columns
Presolve time: 0.01s
Presolved: 232 rows, 56 columns, 1354 nonzeros
Variable types: 0 continuous, 56 integer (56 binary)
Found heuristic solution: objective 7.0000000

Root relaxation: objective 9.541985e+00, 104 iterations, 0.00 seconds

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

     0     0    9.54198    0   44    7.00000    9.54198  36.3%     -    0s
H    0     0                       8.0000000    9.54198  19.3%     -    0s
     0     0    9.31278    0   49    8.00000    9.31278  16.4%     -    0s
     0     0    9.20843    0   47    8.00000    9.20843  15.1%     -    0s
     0     0    9.12664    0   46    8.00000    9.12664  14.1%     -    0s
     0     0    9.10719    0   49    8.00000    9.10719  13.8%     -    0s
     0     0    9.09777    0   48    8.00000    9.09777  13.7%     -    0s
     0     0    9.07723    0   47    8.00000    9.07723  13.5%     -    0s
     0     0    9.02813    0   48    8.00000    9.02813  12.9%     -    0s
     0     0     cutoff    0         8.00000    8.99999  12.5%     -    0s

Cutting planes:
  Clique: 23
  Zero half: 8

Explored 0 nodes (323 simplex iterations) in 0.07 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%