Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:18 2012

Optimize a model with 642 rows, 51 columns and 1284 nonzeros
Presolve removed 460 rows and 0 columns
Presolve time: 0.01s
Presolved: 182 rows, 51 columns, 1042 nonzeros
Variable types: 0 continuous, 51 integer (51 binary)
Found heuristic solution: objective 7.0000000

Root relaxation: objective 9.487685e+00, 91 iterations, 0.00 seconds

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

     0     0    9.48768    0   41    7.00000    9.48768  35.5%     -    0s
     0     0    9.12556    0   43    7.00000    9.12556  30.4%     -    0s
     0     0    9.01934    0   44    7.00000    9.01934  28.8%     -    0s
     0     0    8.96034    0   41    7.00000    8.96034  28.0%     -    0s
     0     0    8.94070    0   46    7.00000    8.94070  27.7%     -    0s
     0     0    8.89825    0   46    7.00000    8.89825  27.1%     -    0s
     0     0    8.89531    0   46    7.00000    8.89531  27.1%     -    0s
     0     2    8.89521    0   46    7.00000    8.89521  27.1%     -    0s

Cutting planes:
  Gomory: 2
  Clique: 25
  Zero half: 4

Explored 17 nodes (691 simplex iterations) in 0.07 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%