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

Optimize a model with 624 rows, 50 columns and 1248 nonzeros
Presolve removed 426 rows and 0 columns
Presolve time: 0.01s
Presolved: 198 rows, 50 columns, 1139 nonzeros
Variable types: 0 continuous, 50 integer (50 binary)
Found heuristic solution: objective 5.0000000

Root relaxation: objective 9.024712e+00, 106 iterations, 0.00 seconds

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

     0     0    9.02471    0   46    5.00000    9.02471  80.5%     -    0s
H    0     0                       6.0000000    9.02471  50.4%     -    0s
H    0     0                       7.0000000    9.02471  28.9%     -    0s
     0     0    8.76380    0   46    7.00000    8.76380  25.2%     -    0s
     0     0    8.66497    0   47    7.00000    8.66497  23.8%     -    0s
     0     0    8.62797    0   46    7.00000    8.62797  23.3%     -    0s
     0     0    8.56738    0   45    7.00000    8.56738  22.4%     -    0s
     0     0    8.54495    0   46    7.00000    8.54495  22.1%     -    0s
     0     0    8.51897    0   45    7.00000    8.51897  21.7%     -    0s
     0     0    8.50568    0   46    7.00000    8.50568  21.5%     -    0s
     0     0    8.50429    0   46    7.00000    8.50429  21.5%     -    0s
     0     2    8.50376    0   46    7.00000    8.50376  21.5%     -    0s

Cutting planes:
  Clique: 16
  Zero half: 9
  Mod-K: 1

Explored 8 nodes (546 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%