Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:13 2012

Optimize a model with 399 rows, 40 columns and 798 nonzeros
Presolve removed 289 rows and 0 columns
Presolve time: 0.00s
Presolved: 110 rows, 40 columns, 573 nonzeros
Variable types: 0 continuous, 40 integer (40 binary)
Found heuristic solution: objective 5.0000000

Root relaxation: objective 7.686207e+00, 96 iterations, 0.00 seconds

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

     0     0    7.68621    0   36    5.00000    7.68621  53.7%     -    0s
H    0     0                       6.0000000    7.68621  28.1%     -    0s
     0     0    7.39175    0   35    6.00000    7.39175  23.2%     -    0s
     0     0    7.31097    0   36    6.00000    7.31097  21.8%     -    0s
     0     0    7.25000    0   32    6.00000    7.25000  20.8%     -    0s
     0     0    7.24242    0   36    6.00000    7.24242  20.7%     -    0s
     0     0    7.22695    0   36    6.00000    7.22695  20.4%     -    0s
     0     0    7.22487    0   36    6.00000    7.22487  20.4%     -    0s
     0     2    7.21905    0   36    6.00000    7.21905  20.3%     -    0s

Cutting planes:
  Clique: 10
  Zero half: 11

Explored 5 nodes (317 simplex iterations) in 0.04 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.000000000000e+00, best bound 6.000000000000e+00, gap 0.0%