Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:16 2012

Optimize a model with 520 rows, 47 columns and 1040 nonzeros
Presolve removed 355 rows and 0 columns
Presolve time: 0.01s
Presolved: 165 rows, 47 columns, 866 nonzeros
Variable types: 0 continuous, 47 integer (47 binary)
Found heuristic solution: objective 6.0000000

Root relaxation: objective 8.816378e+00, 101 iterations, 0.00 seconds

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

     0     0    8.81638    0   41    6.00000    8.81638  46.9%     -    0s
H    0     0                       7.0000000    8.81638  25.9%     -    0s
     0     0    8.51197    0   43    7.00000    8.51197  21.6%     -    0s
     0     0    8.43703    0   42    7.00000    8.43703  20.5%     -    0s
     0     0    8.41268    0   44    7.00000    8.41268  20.2%     -    0s
     0     0    8.40815    0   43    7.00000    8.40815  20.1%     -    0s
     0     0    8.40523    0   43    7.00000    8.40523  20.1%     -    0s
     0     0    8.40523    0   42    7.00000    8.40523  20.1%     -    0s
     0     2    8.40508    0   42    7.00000    8.40508  20.1%     -    0s

Cutting planes:
  Gomory: 2
  Clique: 12
  Zero half: 8

Explored 9 nodes (370 simplex iterations) in 0.05 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%