Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:20 2012

Optimize a model with 663 rows, 52 columns and 1326 nonzeros
Presolve removed 461 rows and 0 columns
Presolve time: 0.01s
Presolved: 202 rows, 52 columns, 1110 nonzeros
Variable types: 0 continuous, 52 integer (52 binary)
Found heuristic solution: objective 6.0000000

Root relaxation: objective 9.689801e+00, 104 iterations, 0.00 seconds

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

     0     0    9.68980    0   47    6.00000    9.68980  61.5%     -    0s
H    0     0                       7.0000000    9.68980  38.4%     -    0s
     0     0    9.35362    0   49    7.00000    9.35362  33.6%     -    0s
     0     0    9.28973    0   50    7.00000    9.28973  32.7%     -    0s
     0     0    9.26461    0   51    7.00000    9.26461  32.4%     -    0s
     0     0    9.26332    0   50    7.00000    9.26332  32.3%     -    0s
     0     0    9.26238    0   51    7.00000    9.26238  32.3%     -    0s
     0     2    9.25530    0   51    7.00000    9.25530  32.2%     -    0s

Cutting planes:
  Gomory: 1
  Clique: 17
  Zero half: 9

Explored 21 nodes (750 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%