Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:39:04 2012

Optimize a model with 81 rows, 74 columns and 274 nonzeros
Presolve removed 0 rows and 5 columns
Presolve time: 0.00s
Presolved: 81 rows, 69 columns, 269 nonzeros
Variable types: 0 continuous, 69 integer (68 binary)
Found heuristic solution: objective 13.0000000

Root relaxation: objective 0.000000e+00, 38 iterations, 0.00 seconds

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

     0     0    0.00000    0   28   13.00000    0.00000   100%     -    0s
H    0     0                       8.0000000    0.00000   100%     -    0s
     0     0    0.41760    0   32    8.00000    0.41760  94.8%     -    0s
H    0     0                       7.0000000    0.41760  94.0%     -    0s
H    0     0                       6.0000000    0.41760  93.0%     -    0s
     0     0    0.93982    0   34    6.00000    0.93982  84.3%     -    0s
     0     0    0.94362    0   34    6.00000    0.94362  84.3%     -    0s
     0     0    0.94362    0   34    6.00000    0.94362  84.3%     -    0s
     0     2    0.98804    0   34    6.00000    0.98804  83.5%     -    0s

Cutting planes:
  Gomory: 3
  Zero half: 1
  Mod-K: 1

Explored 21 nodes (444 simplex iterations) in 0.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.000000000000e+00, best bound 6.000000000000e+00, gap 0.0%