Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:13:14 2012

Optimize a model with 1 rows, 58 columns and 58 nonzeros
Model has 90 quadratic objective terms
Presolve removed 0 rows and 1 columns
Presolve time: 0.00s
Presolved: 91 rows, 147 columns, 327 nonzeros
Variable types: 0 continuous, 147 integer (146 binary)
Found heuristic solution: objective 31.0000000

Root relaxation: objective 0.000000e+00, 117 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   22   31.00000    0.00000   100%     -    0s
H    0     0                      21.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   39   21.00000    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   21   19.00000    0.00000   100%     -    0s
     0     0    0.00000    0   32   19.00000    0.00000   100%     -    0s
     0     0    0.00000    0   30   19.00000    0.00000   100%     -    0s
     0     2    0.00000    0   26   19.00000    0.00000   100%     -    0s
H  171   110                      16.0000000    0.00000   100%   6.0    0s
*  232   138              18      15.0000000    0.00000   100%   7.6    0s
*  237   134              18      14.0000000    0.00000   100%   7.5    0s
H  288   133                      13.0000000    0.00000   100%   9.4    0s

Cutting planes:
  Gomory: 1
  Cover: 170
  MIR: 2

Explored 682 nodes (13438 simplex iterations) in 0.25 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.300000000000e+01, best bound 1.300000000000e+01, gap 0.0%