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

Optimize a model with 663 rows, 51 columns and 1326 nonzeros
Presolve removed 474 rows and 0 columns
Presolve time: 0.01s
Presolved: 189 rows, 51 columns, 1105 nonzeros
Variable types: 0 continuous, 51 integer (51 binary)
Found heuristic solution: objective 6.0000000

Root relaxation: objective 8.665094e+00, 103 iterations, 0.00 seconds

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

     0     0    8.66509    0   44    6.00000    8.66509  44.4%     -    0s
     0     0    8.38020    0   47    6.00000    8.38020  39.7%     -    0s
     0     0    8.33719    0   48    6.00000    8.33719  39.0%     -    0s
     0     0    8.30546    0   48    6.00000    8.30546  38.4%     -    0s
H    0     0                       7.0000000    8.30546  18.6%     -    0s
     0     0    8.28816    0   48    7.00000    8.28816  18.4%     -    0s
     0     0    8.28425    0   48    7.00000    8.28425  18.3%     -    0s
     0     0    8.28141    0   48    7.00000    8.28141  18.3%     -    0s
     0     2    8.28077    0   48    7.00000    8.28077  18.3%     -    0s

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

Explored 7 nodes (449 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%