Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:44:36 2012

Optimize a model with 1566 rows, 80 columns and 3132 nonzeros
Presolve removed 1085 rows and 0 columns
Presolve time: 0.04s
Presolved: 481 rows, 80 columns, 2981 nonzeros
Variable types: 0 continuous, 80 integer (80 binary)
Found heuristic solution: objective 7.0000000

Root relaxation: objective 1.250315e+01, 323 iterations, 0.01 seconds

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

     0     0   12.50315    0   79    7.00000   12.50315  78.6%     -    0s
H    0     0                       8.0000000   12.50315  56.3%     -    0s
     0     0   12.14939    0   79    8.00000   12.14939  51.9%     -    0s
     0     0   12.11819    0   79    8.00000   12.11819  51.5%     -    0s
     0     0   12.07650    0   80    8.00000   12.07650  51.0%     -    0s
     0     0   12.06390    0   80    8.00000   12.06390  50.8%     -    0s
     0     0   12.05525    0   79    8.00000   12.05525  50.7%     -    0s
     0     0   12.05504    0   79    8.00000   12.05504  50.7%     -    0s
     0     2   12.05372    0   79    8.00000   12.05372  50.7%     -    0s

Cutting planes:
  Clique: 42
  Zero half: 2

Explored 112 nodes (5197 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%