Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:23 2012

Optimize a model with 757 rows, 56 columns and 1514 nonzeros
Presolve removed 530 rows and 0 columns
Presolve time: 0.01s
Presolved: 227 rows, 56 columns, 1280 nonzeros
Variable types: 0 continuous, 56 integer (56 binary)
Found heuristic solution: objective 5.0000000

Root relaxation: objective 1.002888e+01, 112 iterations, 0.00 seconds

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

     0     0   10.02888    0   49    5.00000   10.02888   101%     -    0s
H    0     0                       6.0000000   10.02888  67.1%     -    0s
H    0     0                       7.0000000   10.02888  43.3%     -    0s
     0     0    9.70738    0   54    7.00000    9.70738  38.7%     -    0s
     0     0    9.63265    0   54    7.00000    9.63265  37.6%     -    0s
     0     0    9.60713    0   51    7.00000    9.60713  37.2%     -    0s
     0     0    9.58872    0   54    7.00000    9.58872  37.0%     -    0s
     0     0    9.58443    0   53    7.00000    9.58443  36.9%     -    0s
     0     0    9.56903    0   54    7.00000    9.56903  36.7%     -    0s
     0     0    9.56214    0   53    7.00000    9.56214  36.6%     -    0s
     0     0    9.55620    0   54    7.00000    9.55620  36.5%     -    0s
     0     0    9.55344    0   54    7.00000    9.55344  36.5%     -    0s
     0     0    9.55319    0   54    7.00000    9.55319  36.5%     -    0s
     0     2    9.55287    0   54    7.00000    9.55287  36.5%     -    0s
*   23     1               4       8.0000000    9.22902  15.4%  28.5    0s

Cutting planes:
  Clique: 26
  Zero half: 5

Explored 25 nodes (1048 simplex iterations) in 0.13 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%