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

Optimize a model with 647 rows, 50 columns and 1294 nonzeros
Presolve removed 452 rows and 0 columns
Presolve time: 0.01s
Presolved: 195 rows, 50 columns, 1131 nonzeros
Variable types: 0 continuous, 50 integer (50 binary)
Found heuristic solution: objective 6.0000000

Root relaxation: objective 8.963599e+00, 102 iterations, 0.00 seconds

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

     0     0    8.96360    0   44    6.00000    8.96360  49.4%     -    0s
H    0     0                       7.0000000    8.96360  28.1%     -    0s
     0     0    8.69489    0   47    7.00000    8.69489  24.2%     -    0s
     0     0    8.61981    0   47    7.00000    8.61981  23.1%     -    0s
     0     0    8.59047    0   45    7.00000    8.59047  22.7%     -    0s
     0     0    8.57305    0   47    7.00000    8.57305  22.5%     -    0s
     0     0    8.55074    0   47    7.00000    8.55074  22.2%     -    0s
     0     0    8.54740    0   48    7.00000    8.54740  22.1%     -    0s
     0     2    8.54689    0   48    7.00000    8.54689  22.1%     -    0s

Cutting planes:
  Gomory: 1
  Clique: 15
  Zero half: 8

Explored 10 nodes (516 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%