Gurobi 5.0.1 (linux64) logging started Sun Nov 18 00:26:33 2012

Optimize a model with 1 rows, 51 columns and 51 nonzeros
Model has 112 quadratic objective terms
Modified 49 Q diagonals
Presolve removed 0 rows and 1 columns
Presolve time: 0.01s
Presolved: 1 rows, 50 columns, 50 nonzeros
Presolved model has 161 quadratic objective terms
Variable types: 0 continuous, 50 integer (49 binary)
Found heuristic solution: objective 59.0000000

Root relaxation: objective 0.000000e+00, 53 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   49   59.00000    0.00000   100%     -    0s
H    0     0                      30.0000000    0.00000   100%     -    0s
H    0     0                      26.0000000    0.00000   100%     -    0s
H    0     0                      24.0000000    0.00000   100%     -    0s
     0     2    0.00000    0   49   24.00000    0.00000   100%     -    0s
H   62    53                      23.0000000    2.43446  89.4%   2.7    0s
H   68    58                      22.0000000    2.43446  88.9%   2.6    0s
H  807   488                      21.0000000    5.54050  73.6%   2.7    0s
 59383  8221     cutoff   28        21.00000   17.39898  17.1%   2.5    5s

Explored 87640 nodes (219972 simplex iterations) in 7.38 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.100000000000e+01, best bound 2.100000000000e+01, gap 0.0%