Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:12:32 2012 Optimize a model with 246 rows, 699 columns and 699 nonzeros Model has 490 quadratic constraints Presolve removed 0 rows and 20 columns Presolve time: 2.86s Presolved: 246 rows, 679 columns, 679 nonzeros Variable types: 490 continuous, 189 integer (188 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 0 131.0000000 - - - 2s 0 0 0.00000 0 12 131.00000 0.00000 100% - 2s 0 0 0.00000 0 42 131.00000 0.00000 100% - 2s 0 0 0.00000 0 125 131.00000 0.00000 100% - 2s 0 2 0.00000 0 124 131.00000 0.00000 100% - 2s H 51 51 28.0000000 2.20417 92.1% 34.4 3s * 52 52 33 25.0000000 2.20417 91.2% 34.8 3s H 80 71 23.0000000 2.21875 90.4% 31.1 3s * 80 56 20 21.0000000 2.21875 89.4% 32.8 3s H 182 114 20.0000000 3.01942 84.9% 30.8 3s 703 306 17.56061 26 427 20.00000 8.66667 56.7% 32.0 5s * 1516 325 52 18.0000000 9.66102 46.3% 30.8 6s 3195 369 16.96748 34 326 18.00000 13.08078 27.3% 31.0 10s 4068 199 15.96571 35 321 18.00000 14.44094 19.8% 30.2 15s * 4071 136 37 17.0000000 14.44094 15.1% 30.2 15s Explored 4243 nodes (130232 simplex iterations) in 15.48 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.700000000000e+01, best bound 1.700000000000e+01, gap 0.0%