Gurobi 5.0.1 (linux64) logging started Sun Nov 18 09:49:32 2012

Optimize a model with 307 rows, 856 columns and 856 nonzeros
Model has 612 quadratic constraints
Presolve removed 0 rows and 13 columns
Presolve time: 3.57s
Presolved: 307 rows, 843 columns, 843 nonzeros
Variable types: 612 continuous, 231 integer (230 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                     147.0000000          -     -      -    3s
     0     0    0.00000    0    2  147.00000    0.00000   100%     -    3s
     0     0    0.00000    0    2  147.00000    0.00000   100%     -    3s
     0     0    0.00000    0  156  147.00000    0.00000   100%     -    3s
     0     2    0.00000    0  155  147.00000    0.00000   100%     -    3s
H   38    38                      30.0000000    3.00488  90.0%  44.5    3s
*   47    43              31      25.0000000    3.00488  88.0%  43.0    3s
H  410   211                      24.0000000    5.74545  76.1%  23.1    4s
*  421   201              38      23.0000000    5.74545  75.0%  23.4    4s
   606   285    7.00000   16  515   23.00000    7.00000  69.6%  30.0    5s
* 1515   391              38      22.0000000   12.00000  45.5%  42.9    8s
  1848   434   18.23697   39  515   22.00000   12.97674  41.0%  44.1   10s
  3289   468     cutoff   37        22.00000   15.92593  27.6%  42.4   15s
  3811   413   20.44172   36  478   22.00000   16.84783  23.4%  42.4   20s
  4126   350   18.29489   36  510   22.00000   17.24176  21.6%  42.3   25s
  4645   198     cutoff   40        22.00000   18.21528  17.2%  42.5   30s

Explored 5060 nodes (215929 simplex iterations) in 32.09 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%