Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:03:47 2012 Optimize a model with 225 rows, 648 columns and 648 nonzeros Model has 448 quadratic constraints Presolve removed 0 rows and 20 columns Presolve time: 2.62s Presolved: 225 rows, 628 columns, 628 nonzeros Variable types: 448 continuous, 180 integer (179 binary) Root relaxation: objective 0.000000e+00, 79 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 112.0000000 - - - 2s 0 0 0.00000 0 4 112.00000 0.00000 100% - 2s 0 0 0.00000 0 95 112.00000 0.00000 100% - 2s 0 0 0.00000 0 100 112.00000 0.00000 100% - 2s 0 2 0.00000 0 100 112.00000 0.00000 100% - 2s H 42 42 23.0000000 1.67500 92.7% 36.0 2s * 43 43 30 22.0000000 1.67500 92.4% 35.5 2s * 46 42 30 21.0000000 1.67500 92.0% 34.2 2s * 75 60 25 20.0000000 1.78899 91.1% 26.7 2s H 108 68 17.0000000 2.31373 86.4% 23.7 2s * 120 70 33 16.0000000 2.31373 85.5% 22.9 2s H 190 87 15.0000000 2.47059 83.5% 19.7 2s H 240 86 14.0000000 3.32639 76.2% 19.0 2s * 800 184 32 13.0000000 6.37838 50.9% 29.7 4s Explored 894 nodes (28196 simplex iterations) in 4.79 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.300000000000e+01, best bound 1.300000000000e+01, gap 0.0%