Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:12:10 2012

Optimize a model with 3824 rows, 650 columns and 11998 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.07s
Presolved: 3847 rows, 648 columns, 19061 nonzeros
Variable types: 0 continuous, 648 integer (648 binary)
Found heuristic solution: objective 25.0000000

Root relaxation: objective 4.628571e+00, 2404 iterations, 0.12 seconds

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

     0     0    4.62857    0  269   25.00000    4.62857  81.5%     -    0s
     0     0    6.00000    0   54   25.00000    6.00000  76.0%     -    0s
H    0     0                      24.0000000    6.00000  75.0%     -    0s
H    0     0                      16.0000000    6.00000  62.5%     -    0s
H    0     0                       7.0000000    6.00000  14.3%     -    0s
     0     0    6.00000    0   31    7.00000    6.00000  14.3%     -    1s
     0     0    6.00000    0   30    7.00000    6.00000  14.3%     -    1s
     0     0    6.00000    0   51    7.00000    6.00000  14.3%     -    1s
     0     0    6.00000    0   36    7.00000    6.00000  14.3%     -    1s
     0     0    6.00000    0   53    7.00000    6.00000  14.3%     -    1s
     0     0    6.00000    0   52    7.00000    6.00000  14.3%     -    1s
     0     0    6.00000    0   41    7.00000    6.00000  14.3%     -    1s
     0     0    6.00000    0   43    7.00000    6.00000  14.3%     -    1s
     0     0    6.00000    0   45    7.00000    6.00000  14.3%     -    1s
     0     0    6.00000    0   45    7.00000    6.00000  14.3%     -    1s
     0     2    6.00000    0   45    7.00000    6.00000  14.3%     -    1s

Cutting planes:
  Clique: 7
  Zero half: 6

Explored 13 nodes (10531 simplex iterations) in 1.36 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.000000000000e+00, best bound 7.000000000000e+00, gap 0.0%