Gurobi 5.0.1 (linux64) logging started Sun Nov 18 09:40:59 2012

Optimize a model with 298 rows, 837 columns and 837 nonzeros
Model has 594 quadratic constraints
Presolve removed 0 rows and 21 columns
Presolve time: 3.47s
Presolved: 298 rows, 816 columns, 816 nonzeros
Variable types: 594 continuous, 222 integer (221 binary)

Root relaxation: objective 0.000000e+00, 83 iterations, 0.00 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

H    0     0                     134.0000000          -     -      -    3s
     0     0    0.00000    0    3  134.00000    0.00000   100%     -    3s
     0     0    0.00000    0    3  134.00000    0.00000   100%     -    3s
     0     0    0.00000    0  119  134.00000    0.00000   100%     -    3s
     0     2    0.00000    0  118  134.00000    0.00000   100%     -    3s
H   41    41                      30.0000000    2.36170  92.1%  54.1    3s
*   41    41              31      28.0000000    2.36170  91.6%  54.2    3s
*   42    39              32      27.0000000    2.36170  91.3%  53.0    3s
H  288   196                      26.0000000    5.08602  80.4%  23.9    4s
   648   384   22.69334   34  318   26.00000    9.43548  63.7%  32.4    5s
*  673   372              46      24.0000000    9.43548  60.7%  32.3    5s
* 1123   458              39      23.0000000    9.43548  59.0%  41.6    9s
  1454   425     cutoff   40        23.00000   11.70992  49.1%  38.5   10s
H 2300   341                      22.0000000   14.39891  34.6%  33.2   11s
  2856   323   18.74194   36  458   22.00000   15.66154  28.8%  32.7   15s
  3743   220     cutoff   39        22.00000   17.29001  21.4%  32.6   20s

Explored 4405 nodes (140922 simplex iterations) in 22.32 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%