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

Optimize a model with 672 rows, 52 columns and 1344 nonzeros
Presolve removed 466 rows and 0 columns
Presolve time: 0.01s
Presolved: 206 rows, 52 columns, 1164 nonzeros
Variable types: 0 continuous, 52 integer (52 binary)
Found heuristic solution: objective 6.0000000

Root relaxation: objective 9.292434e+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    9.29243    0   42    6.00000    9.29243  54.9%     -    0s
H    0     0                       8.0000000    9.29243  16.2%     -    0s
     0     0     cutoff    0         8.00000    8.99999  12.5%     -    0s

Cutting planes:
  Gomory: 3
  Clique: 33
  Zero half: 55

Explored 0 nodes (131 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%