Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:21 2012

Optimize a model with 691 rows, 53 columns and 1382 nonzeros
Presolve removed 474 rows and 0 columns
Presolve time: 0.01s
Presolved: 217 rows, 53 columns, 1228 nonzeros
Variable types: 0 continuous, 53 integer (53 binary)
Found heuristic solution: objective 6.0000000

Root relaxation: objective 9.472043e+00, 115 iterations, 0.00 seconds

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

     0     0    9.47204    0   48    6.00000    9.47204  57.9%     -    0s
H    0     0                       7.0000000    9.47204  35.3%     -    0s
H    0     0                       8.0000000    9.47204  18.4%     -    0s
     0     0    9.16217    0   46    8.00000    9.16217  14.5%     -    0s
     0     0     cutoff    0         8.00000    8.99999  12.5%     -    0s

Cutting planes:
  Gomory: 3
  Clique: 25
  Zero half: 4

Explored 0 nodes (200 simplex iterations) in 0.03 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%