Gurobi 5.0.1 (linux64) logging started Sun Nov 18 09:10:46 2012 Optimize a model with 307 rows, 852 columns and 852 nonzeros Model has 612 quadratic constraints Presolve removed 0 rows and 15 columns Presolve time: 3.57s Presolved: 307 rows, 837 columns, 837 nonzeros Variable types: 612 continuous, 225 integer (224 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 0 144.0000000 - - - 3s 0 0 0.00000 0 3 144.00000 0.00000 100% - 3s 0 0 0.00000 0 156 144.00000 0.00000 100% - 3s 0 0 0.00000 0 2 144.00000 0.00000 100% - 3s 0 2 0.00000 0 160 144.00000 0.00000 100% - 3s H 49 49 37.0000000 3.58065 90.3% 53.2 3s H 54 54 31.0000000 3.58065 88.4% 51.8 3s * 59 59 35 28.0000000 3.58065 87.2% 49.1 3s H 105 90 27.0000000 5.02500 81.4% 35.8 3s * 105 89 34 26.0000000 5.02500 80.7% 36.2 3s 607 339 9.57534 15 823 26.00000 9.57534 63.2% 33.7 5s 2254 598 25.50000 37 470 26.00000 16.68124 35.8% 30.4 10s 4273 1018 20.53930 33 468 26.00000 18.80807 27.7% 25.8 15s * 5452 946 67 25.0000000 19.51797 21.9% 25.0 17s 6247 876 cutoff 36 25.00000 20.02797 19.9% 25.2 20s * 6882 572 41 24.0000000 20.54878 14.4% 25.1 21s 7631 220 22.79545 36 452 24.00000 22.05714 8.10% 25.2 25s Explored 7858 nodes (197109 simplex iterations) in 26.98 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.400000000000e+01, best bound 2.400000000000e+01, gap 0.0%