Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:43:20 2012 Optimize a model with 247 rows, 712 columns and 712 nonzeros Model has 492 quadratic constraints Presolve removed 0 rows and 13 columns Presolve time: 2.87s Presolved: 247 rows, 699 columns, 699 nonzeros Variable types: 492 continuous, 207 integer (206 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 0 120.0000000 - - - 2s 0 0 0.00000 0 19 120.00000 0.00000 100% - 2s 0 0 0.00000 0 2 120.00000 0.00000 100% - 2s 0 0 0.00000 0 2 120.00000 0.00000 100% - 2s 0 2 0.00000 0 156 120.00000 0.00000 100% - 3s H 27 27 46.0000000 1.64239 96.4% 85.7 3s H 46 46 21.0000000 1.64239 92.2% 55.1 3s H 82 57 19.0000000 1.86923 90.2% 38.2 3s * 83 50 19 17.0000000 1.86923 89.0% 38.4 3s * 247 138 17 16.0000000 3.39098 78.8% 28.4 3s * 410 184 28 15.0000000 5.92299 60.5% 26.5 3s 655 253 12.52903 24 361 15.00000 7.17857 52.1% 34.7 5s * 811 267 45 12.0000000 7.17857 40.2% 39.1 5s Explored 1079 nodes (42627 simplex iterations) in 6.17 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%