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

Optimize a model with 616 rows, 50 columns and 1232 nonzeros
Presolve removed 427 rows and 0 columns
Presolve time: 0.01s
Presolved: 189 rows, 50 columns, 1077 nonzeros
Variable types: 0 continuous, 50 integer (50 binary)
Found heuristic solution: objective 5.0000000

Root relaxation: objective 8.967340e+00, 112 iterations, 0.00 seconds

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

     0     0    8.96734    0   45    5.00000    8.96734  79.3%     -    0s
H    0     0                       7.0000000    8.96734  28.1%     -    0s
     0     0    8.74455    0   47    7.00000    8.74455  24.9%     -    0s
H    0     0                       8.0000000    8.74455  9.31%     -    0s

Cutting planes:
  Clique: 4
  Zero half: 4

Explored 0 nodes (169 simplex iterations) in 0.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0%