Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:44:33 2012

Optimize a model with 1538 rows, 79 columns and 3076 nonzeros
Presolve removed 1087 rows and 0 columns
Presolve time: 0.04s
Presolved: 451 rows, 79 columns, 2834 nonzeros
Variable types: 0 continuous, 79 integer (79 binary)
Found heuristic solution: objective 7.0000000

Root relaxation: objective 1.256434e+01, 227 iterations, 0.01 seconds

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

     0     0   12.56434    0   71    7.00000   12.56434  79.5%     -    0s
H    0     0                       8.0000000   12.56434  57.1%     -    0s
     0     0   12.19521    0   76    8.00000   12.19521  52.4%     -    0s
     0     0   12.10504    0   77    8.00000   12.10504  51.3%     -    0s
     0     0   12.07885    0   78    8.00000   12.07885  51.0%     -    0s
     0     0   12.06261    0   77    8.00000   12.06261  50.8%     -    0s
     0     0   12.05904    0   77    8.00000   12.05904  50.7%     -    0s
     0     0   12.05902    0   77    8.00000   12.05902  50.7%     -    0s
     0     2   12.05826    0   77    8.00000   12.05826  50.7%     -    0s

Cutting planes:
  Clique: 54
  Zero half: 2

Explored 115 nodes (5294 simplex iterations) in 0.57 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%