Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:38:40 2012

Optimize a model with 1 rows, 31 columns and 31 nonzeros
Model has 54 quadratic objective terms
Presolve time: 0.00s
Presolved: 55 rows, 85 columns, 193 nonzeros
Variable types: 0 continuous, 85 integer (85 binary)
Found heuristic solution: objective 29.0000000

Root relaxation: objective 0.000000e+00, 72 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   21   29.00000    0.00000   100%     -    0s
H    0     0                      21.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   20   21.00000    0.00000   100%     -    0s
H    0     0                      17.0000000    0.00000   100%     -    0s
H    0     0                      11.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   20   11.00000    0.00000   100%     -    0s
     0     0    0.00000    0   12   11.00000    0.00000   100%     -    0s
     0     0    0.00000    0   12   11.00000    0.00000   100%     -    0s
     0     0    0.00000    0   13   11.00000    0.00000   100%     -    0s
     0     0    0.00000    0   13   11.00000    0.00000   100%     -    0s
     0     2    0.00000    0   13   11.00000    0.00000   100%     -    0s
*  281    36               6       9.0000000    4.42857  50.8%   9.6    0s

Cutting planes:
  Cover: 100
  MIR: 3
  Zero half: 2

Explored 321 nodes (3237 simplex iterations) in 0.06 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%