Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:53:08 2012

Optimize a model with 1 rows, 48 columns and 48 nonzeros
Model has 107 quadratic objective terms
Modified 48 Q diagonals
Presolve time: 0.01s
Presolved: 1 rows, 48 columns, 48 nonzeros
Presolved model has 155 quadratic objective terms
Variable types: 0 continuous, 48 integer (48 binary)
Found heuristic solution: objective 57.0000000

Root relaxation: objective 0.000000e+00, 50 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   48   57.00000    0.00000   100%     -    0s
H    0     0                      42.0000000    0.00000   100%     -    0s
H    0     0                      41.0000000    0.00000   100%     -    0s
H    0     0                      27.0000000    0.00000   100%     -    0s
     0     2    1.87995    0   48   27.00000    1.87995  93.0%     -    0s
H  114    86                      25.0000000    4.14585  83.4%   2.6    0s
H  345   270                      24.0000000    4.29041  82.1%   2.4    0s
H  442   341                      23.0000000    4.29041  81.3%   2.5    0s
H  540   375                      22.0000000    5.53900  74.8%   2.5    0s
 62107  8504   18.36529   23   35   22.00000   18.36529  16.5%   2.7    5s

Explored 91044 nodes (247969 simplex iterations) in 7.34 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.200000000000e+01, best bound 2.200000000000e+01, gap 0.0%