Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:18:33 2012

Optimize a model with 259 rows, 728 columns and 728 nonzeros
Model has 516 quadratic constraints
Presolve removed 0 rows and 18 columns
Presolve time: 3.01s
Presolved: 259 rows, 710 columns, 710 nonzeros
Variable types: 516 continuous, 194 integer (193 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                     129.0000000          -     -      -    3s
     0     0    0.00000    0    4  129.00000    0.00000   100%     -    3s
     0     0    0.00000    0    4  129.00000    0.00000   100%     -    3s
     0     0    0.00000    0    4  129.00000    0.00000   100%     -    3s
     0     2    0.00000    0  106  129.00000    0.00000   100%     -    3s
*   28    28              22      26.0000000    2.41379  90.7%  50.5    3s
*   29    27              22      25.0000000    2.41379  90.3%  55.0    3s
*   30    26              21      24.0000000    2.41379  89.9%  53.2    3s
*   40    30              28      23.0000000    2.41379  89.5%  47.5    3s
*  252   154              22      22.0000000    4.93827  77.6%  24.3    3s
   603   320   19.87097   15  441   22.00000    8.88462  59.6%  20.9    5s
*  792   381              47      19.0000000    8.88462  53.2%  32.9    6s
H  993   358                      18.0000000    8.88462  50.6%  33.7    7s
  2260   188     cutoff   29        18.00000   13.18824  26.7%  32.0   10s

Explored 3095 nodes (100399 simplex iterations) in 14.05 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.800000000000e+01, best bound 1.800000000000e+01, gap 0.0%