Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:12:55 2012

Optimize a model with 1 rows, 57 columns and 57 nonzeros
Model has 107 quadratic objective terms
Presolve removed 0 rows and 3 columns
Presolve time: 0.00s
Presolved: 108 rows, 161 columns, 375 nonzeros
Variable types: 0 continuous, 161 integer (160 binary)
Found heuristic solution: objective 43.0000000

Root relaxation: objective 0.000000e+00, 145 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   43   43.00000    0.00000   100%     -    0s
H    0     0                      38.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   42   38.00000    0.00000   100%     -    0s
H    0     0                      29.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   50   29.00000    0.00000   100%     -    0s
     0     0    0.00000    0   31   29.00000    0.00000   100%     -    0s
     0     2    0.00000    0   31   29.00000    0.00000   100%     -    0s
H   34    34                      28.0000000    0.00000   100%   2.5    0s
H  120    96                      27.0000000    0.00000   100%   4.7    0s
H  135   109                      25.0000000    0.00000   100%   5.2    0s
H  243   150                      22.0000000    1.00000  95.5%   7.9    0s
H  545   221                      21.0000000    5.00000  76.2%  13.7    0s
*  741   198              13      20.0000000    8.00000  60.0%  16.3    0s

Cutting planes:
  Cover: 209
  MIR: 5
  Zero half: 3

Explored 1332 nodes (22411 simplex iterations) in 0.51 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.000000000000e+01, best bound 2.000000000000e+01, gap 0.0%