Gurobi 5.0.1 (linux64) logging started Sun Nov 18 08:13:11 2012

Optimize a model with 279 rows, 791 columns and 791 nonzeros
Model has 556 quadratic constraints
Presolve removed 0 rows and 20 columns
Presolve time: 3.25s
Presolved: 279 rows, 771 columns, 771 nonzeros
Variable types: 556 continuous, 215 integer (214 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                     135.0000000          -     -      -    3s
     0     0    0.00000    0  117  135.00000    0.00000   100%     -    3s
     0     0    0.00000    0  117  135.00000    0.00000   100%     -    3s
     0     0    0.00000    0  183  135.00000    0.00000   100%     -    3s
     0     2    0.00000    0  183  135.00000    0.00000   100%     -    3s
H   32    32                      31.0000000    2.54545  91.8%  49.8    3s
H   66    66                      24.0000000    2.54545  89.4%  31.4    3s
*   68    68              35      23.0000000    2.54545  88.9%  31.4    3s
H  144   101                      21.0000000    4.85970  76.9%  31.5    3s
   606   288    9.21429   16  464   21.00000    9.21429  56.1%  32.8    5s
H 1261   396                      20.0000000    9.21429  53.9%  40.1    7s
* 1974   379              48      19.0000000   10.83516  43.0%  37.0    9s
  2237   406   17.66871   36  460   19.00000   11.50000  39.5%  37.0   10s
  3462   432   15.96774   34  466   19.00000   13.49383  29.0%  37.2   15s
  3952   372     cutoff   36        19.00000   14.12924  25.6%  37.5   20s
  5009    75   18.00000   38  453   19.00000   17.00000  10.5%  36.7   25s

Explored 5102 nodes (189638 simplex iterations) in 25.43 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.900000000000e+01, best bound 1.900000000000e+01, gap 0.0%