Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:44:40 2012

Optimize a model with 1580 rows, 80 columns and 3160 nonzeros
Presolve removed 1097 rows and 0 columns
Presolve time: 0.03s
Presolved: 483 rows, 80 columns, 3108 nonzeros
Variable types: 0 continuous, 80 integer (80 binary)
Found heuristic solution: objective 8.0000000

Root relaxation: objective 1.218667e+01, 317 iterations, 0.01 seconds

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

     0     0   12.18667    0   76    8.00000   12.18667  52.3%     -    0s
     0     0   11.87748    0   79    8.00000   11.87748  48.5%     -    0s
     0     0   11.84250    0   79    8.00000   11.84250  48.0%     -    0s
     0     0   11.80930    0   78    8.00000   11.80930  47.6%     -    0s
H    0     0                       9.0000000   11.80930  31.2%     -    0s
     0     0   11.80357    0   79    9.00000   11.80357  31.2%     -    0s
     0     0   11.79455    0   79    9.00000   11.79455  31.1%     -    0s
     0     0   11.78465    0   79    9.00000   11.78465  30.9%     -    0s
     0     0   11.75895    0   78    9.00000   11.75895  30.7%     -    0s
     0     0   11.75305    0   79    9.00000   11.75305  30.6%     -    0s
     0     0   11.74407    0   79    9.00000   11.74407  30.5%     -    0s
     0     0   11.74353    0   79    9.00000   11.74353  30.5%     -    0s
     0     0   11.74335    0   78    9.00000   11.74335  30.5%     -    0s
     0     0   11.74328    0   79    9.00000   11.74328  30.5%     -    0s
     0     2   11.74313    0   79    9.00000   11.74313  30.5%     -    0s

Cutting planes:
  Clique: 31
  Zero half: 8

Explored 30 nodes (2458 simplex iterations) in 0.57 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 9.000000000000e+00, best bound 9.000000000000e+00, gap 0.0%