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

Optimize a model with 640 rows, 51 columns and 1280 nonzeros
Presolve removed 439 rows and 0 columns
Presolve time: 0.01s
Presolved: 201 rows, 51 columns, 1136 nonzeros
Variable types: 0 continuous, 51 integer (51 binary)
Found heuristic solution: objective 7.0000000

Root relaxation: objective 9.354943e+00, 105 iterations, 0.00 seconds

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

     0     0    9.35494    0   45    7.00000    9.35494  33.6%     -    0s
     0     0    8.90662    0   46    7.00000    8.90662  27.2%     -    0s
     0     0    8.84369    0   42    7.00000    8.84369  26.3%     -    0s
     0     0    8.79265    0   42    7.00000    8.79265  25.6%     -    0s
     0     0    8.78823    0   45    7.00000    8.78823  25.5%     -    0s
     0     0    8.78704    0   46    7.00000    8.78704  25.5%     -    0s
     0     2    8.78650    0   46    7.00000    8.78650  25.5%     -    0s

Cutting planes:
  Gomory: 2
  Clique: 22
  Zero half: 1

Explored 17 nodes (577 simplex iterations) in 0.08 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%