Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:11:33 2012 Optimize a model with 220 rows, 646 columns and 646 nonzeros Model has 438 quadratic constraints Presolve removed 0 rows and 26 columns Presolve time: 2.55s Presolved: 220 rows, 620 columns, 620 nonzeros Variable types: 438 continuous, 182 integer (181 binary) Root relaxation: objective 0.000000e+00, 77 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 114.0000000 - - - 2s 0 0 0.00000 0 38 114.00000 0.00000 100% - 2s 0 0 0.00000 0 48 114.00000 0.00000 100% - 2s 0 0 0.00000 0 130 114.00000 0.00000 100% - 2s 0 2 0.00000 0 128 114.00000 0.00000 100% - 2s H 54 54 23.0000000 2.57778 88.8% 34.2 2s * 55 55 37 21.0000000 2.57778 87.7% 35.8 2s H 85 77 20.0000000 3.38889 83.1% 29.8 2s * 88 78 22 19.0000000 3.38889 82.2% 33.0 2s H 116 78 16.0000000 3.55659 77.8% 29.4 2s * 116 70 23 15.0000000 3.55659 76.3% 29.5 2s * 118 56 22 14.0000000 3.55659 74.6% 29.6 2s * 543 145 23 13.0000000 7.57771 41.7% 20.1 3s * 675 88 9 12.0000000 8.52632 28.9% 21.6 3s Cutting planes: Explored 1011 nodes (21291 simplex iterations) in 3.52 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.200000000000e+01, best bound 1.200000000000e+01, gap 0.0%