Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:23:53 2012

Optimize a model with 120 rows, 309 columns and 309 nonzeros
Model has 238 quadratic constraints
Presolve removed 0 rows and 2 columns
Presolve time: 1.39s
Presolved: 120 rows, 307 columns, 307 nonzeros
Variable types: 238 continuous, 69 integer (68 binary)

Root relaxation: objective 0.000000e+00, 35 iterations, 0.00 seconds

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

H    0     0                      51.0000000          -     -      -    1s
     0     0    0.00000    0   45   51.00000    0.00000   100%     -    1s
     0     0    0.11556    0   63   51.00000    0.11556   100%     -    1s
     0     2    0.12688    0   63   51.00000    0.12688   100%     -    1s
H   46    46                      30.0000000    2.46647  91.8%  25.0    1s
*   50    44              28      29.0000000    2.46647  91.5%  24.1    1s
*   74    57              16      24.0000000    2.50909  89.5%  27.3    1s
H  108    74                      23.0000000    4.00703  82.6%  28.7    1s
*  109    73              18      22.0000000    4.00703  81.8%  28.7    1s
*  137    90              17      21.0000000    4.08824  80.5%  29.0    1s
H  159    93                      20.0000000    4.09483  79.5%  28.2    1s
*  253   108              13      19.0000000    7.09091  62.7%  25.7    1s
*  775   165              25      18.0000000   10.92727  39.3%  25.4    2s

Explored 1481 nodes (37073 simplex iterations) in 3.43 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%