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

Optimize a model with 737 rows, 56 columns and 1474 nonzeros
Presolve removed 492 rows and 0 columns
Presolve time: 0.01s
Presolved: 245 rows, 56 columns, 1307 nonzeros
Variable types: 0 continuous, 56 integer (56 binary)
Found heuristic solution: objective 6.0000000

Root relaxation: objective 1.033269e+01, 128 iterations, 0.00 seconds

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

     0     0   10.33269    0   54    6.00000   10.33269  72.2%     -    0s
H    0     0                       7.0000000   10.33269  47.6%     -    0s
     0     0   10.05652    0   55    7.00000   10.05652  43.7%     -    0s
     0     0    9.99051    0   54    7.00000    9.99051  42.7%     -    0s
     0     0    9.95210    0   53    7.00000    9.95210  42.2%     -    0s
H    0     0                       8.0000000    9.95210  24.4%     -    0s
     0     0    9.93981    0   54    8.00000    9.93981  24.2%     -    0s
     0     0    9.93105    0   54    8.00000    9.93105  24.1%     -    0s
     0     0    9.92163    0   54    8.00000    9.92163  24.0%     -    0s
     0     0    9.92050    0   54    8.00000    9.92050  24.0%     -    0s
     0     2    9.91517    0   54    8.00000    9.91517  23.9%     -    0s

Cutting planes:
  Clique: 19
  Zero half: 9

Explored 13 nodes (791 simplex iterations) in 0.11 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%