Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:12:19 2012

Optimize a model with 3774 rows, 650 columns and 11848 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.07s
Presolved: 3797 rows, 648 columns, 19300 nonzeros
Variable types: 0 continuous, 648 integer (648 binary)
Found heuristic solution: objective 25.0000000

Root relaxation: objective 4.666667e+00, 3015 iterations, 0.18 seconds

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

     0     0    4.66667    0  285   25.00000    4.66667  81.3%     -    0s
H    0     0                      24.0000000    4.66667  80.6%     -    1s
     0     0    6.00000    0   88   24.00000    6.00000  75.0%     -    1s
H    0     0                       9.0000000    6.00000  33.3%     -    1s
     0     0    6.00000    0   82    9.00000    6.00000  33.3%     -    1s
H    0     0                       7.0000000    6.00000  14.3%     -    1s
     0     0    6.00000    0   18    7.00000    6.00000  14.3%     -    1s
     0     0    6.00000    0   18    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   18    7.00000    6.00000  14.3%     -    1s
     0     0    6.00000    0   27    7.00000    6.00000  14.3%     -    1s
     0     0    6.00000    0   21    7.00000    6.00000  14.3%     -    1s
     0     0    6.00000    0   27    7.00000    6.00000  14.3%     -    1s
     0     0    6.00000    0   25    7.00000    6.00000  14.3%     -    1s
     0     2    6.00000    0   25    7.00000    6.00000  14.3%     -    1s

Cutting planes:
  Clique: 3
  Zero half: 1

Explored 19 nodes (12414 simplex iterations) in 1.60 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%