Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:25 2012

Optimize a model with 795 rows, 57 columns and 1590 nonzeros
Presolve removed 551 rows and 0 columns
Presolve time: 0.01s
Presolved: 244 rows, 57 columns, 1401 nonzeros
Variable types: 0 continuous, 57 integer (57 binary)
Found heuristic solution: objective 7.0000000

Root relaxation: objective 1.006681e+01, 130 iterations, 0.00 seconds

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

     0     0   10.06681    0   49    7.00000   10.06681  43.8%     -    0s
     0     0    9.65864    0   56    7.00000    9.65864  38.0%     -    0s
H    0     0                       8.0000000    9.65864  20.7%     -    0s
     0     0    9.59316    0   56    8.00000    9.59316  19.9%     -    0s
     0     0    9.56555    0   56    8.00000    9.56555  19.6%     -    0s
     0     0    9.55201    0   55    8.00000    9.55201  19.4%     -    0s
     0     0    9.53455    0   56    8.00000    9.53455  19.2%     -    0s
     0     0    9.51799    0   53    8.00000    9.51799  19.0%     -    0s
     0     0    9.51169    0   55    8.00000    9.51169  18.9%     -    0s
     0     0    9.51033    0   56    8.00000    9.51033  18.9%     -    0s
     0     0    9.51029    0   56    8.00000    9.51029  18.9%     -    0s
     0     2    9.50819    0   56    8.00000    9.50819  18.9%     -    0s

Cutting planes:
  Clique: 22
  Zero half: 7

Explored 9 nodes (584 simplex iterations) in 0.12 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%