Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:13:12 2012

Optimize a model with 1 rows, 58 columns and 58 nonzeros
Model has 89 quadratic objective terms
Presolve removed 0 rows and 2 columns
Presolve time: 0.00s
Presolved: 90 rows, 145 columns, 323 nonzeros
Variable types: 0 continuous, 145 integer (144 binary)
Found heuristic solution: objective 35.0000000

Root relaxation: objective 0.000000e+00, 105 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   32   35.00000    0.00000   100%     -    0s
H    0     0                      31.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   32   31.00000    0.00000   100%     -    0s
H    0     0                      28.0000000    0.00000   100%     -    0s
H    0     0                      26.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   25   26.00000    0.00000   100%     -    0s
H    0     0                      19.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   28   19.00000    0.00000   100%     -    0s
     0     0    0.00000    0   22   19.00000    0.00000   100%     -    0s
H    0     0                      16.0000000    0.00000   100%     -    0s
H    0     0                      15.0000000    0.00000   100%     -    0s
     0     2    0.00000    0   22   15.00000    0.00000   100%     -    0s
H   54    30                      14.0000000    0.00000   100%   1.3    0s
H  188    99                      12.0000000    0.00000   100%   5.8    0s

Cutting planes:
  Cover: 171

Explored 501 nodes (10215 simplex iterations) in 0.18 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.200000000000e+01, best bound 1.200000000000e+01, gap 0.0%