Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:56:33 2012

Optimize a model with 290 rows, 810 columns and 810 nonzeros
Model has 578 quadratic constraints
Presolve removed 0 rows and 14 columns
Presolve time: 3.37s
Presolved: 290 rows, 796 columns, 796 nonzeros
Variable types: 578 continuous, 218 integer (217 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                     153.0000000          -     -      -    3s
     0     0    0.00000    0   55  153.00000    0.00000   100%     -    3s
     0     0    0.00000    0  179  153.00000    0.00000   100%     -    3s
     0     0    0.00000    0  169  153.00000    0.00000   100%     -    3s
     0     2    0.00000    0  165  153.00000    0.00000   100%     -    3s
H   44    40                      25.0000000    3.66038  85.4%  48.1    3s
H  521   284                      24.0000000    8.18182  65.9%  27.8    4s
*  522   245              18      23.0000000    8.18182  64.4%  28.0    4s
   703   309   15.27692    7  497   23.00000    9.91276  56.9%  27.3    5s
  1850   539   20.56322   44  441   23.00000   12.12534  47.3%  37.2   10s
* 2027   511              47      22.0000000   12.50949  43.1%  36.6   10s
* 2356   526              45      21.0000000   13.15447  37.4%  36.5   11s
H 3424   481                      20.0000000   14.86344  25.7%  36.6   14s
  3481   474   18.24695   39  494   20.00000   14.97513  25.1%  36.6   15s
  4259   290   18.29742   39  375   20.00000   16.63178  16.8%  36.4   20s
  4654    90   18.85791   43  493   20.00000   18.02830  9.86%  36.9   25s

Explored 4760 nodes (176731 simplex iterations) in 26.11 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%