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

Optimize a model with 617 rows, 50 columns and 1234 nonzeros
Presolve removed 441 rows and 0 columns
Presolve time: 0.01s
Presolved: 176 rows, 50 columns, 1006 nonzeros
Variable types: 0 continuous, 50 integer (50 binary)
Found heuristic solution: objective 5.0000000

Root relaxation: objective 9.122656e+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    9.12266    0   44    5.00000    9.12266  82.5%     -    0s
H    0     0                       7.0000000    9.12266  30.3%     -    0s
     0     0    8.69842    0   50    7.00000    8.69842  24.3%     -    0s
     0     0    8.67308    0   48    7.00000    8.67308  23.9%     -    0s
     0     0    8.63199    0   47    7.00000    8.63199  23.3%     -    0s
     0     0    8.61662    0   47    7.00000    8.61662  23.1%     -    0s
     0     0    8.60277    0   49    7.00000    8.60277  22.9%     -    0s
     0     0    8.57068    0   48    7.00000    8.57068  22.4%     -    0s
     0     0    8.57043    0   48    7.00000    8.57043  22.4%     -    0s
     0     2    8.56784    0   48    7.00000    8.56784  22.4%     -    0s

Cutting planes:
  Gomory: 1
  Clique: 17
  Zero half: 7

Explored 9 nodes (495 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%