Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:31:31 2012 Optimize a model with 231 rows, 677 columns and 677 nonzeros Model has 460 quadratic constraints Presolve removed 0 rows and 27 columns Presolve time: 2.68s Presolved: 231 rows, 650 columns, 650 nonzeros Variable types: 460 continuous, 190 integer (189 binary) Root relaxation: objective 0.000000e+00, 81 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 116.0000000 - - - 2s 0 0 0.00000 0 127 116.00000 0.00000 100% - 2s 0 0 0.00000 0 127 116.00000 0.00000 100% - 2s 0 0 0.00000 0 126 116.00000 0.00000 100% - 2s 0 2 0.00000 0 121 116.00000 0.00000 100% - 2s H 54 54 24.0000000 1.97059 91.8% 35.9 2s * 55 54 31 19.0000000 1.97059 89.6% 35.3 2s * 102 84 32 18.0000000 2.02128 88.8% 28.8 2s H 163 110 17.0000000 4.00000 76.5% 27.1 2s 679 318 16.47522 32 209 17.00000 6.87879 59.5% 31.6 5s * 1166 306 46 15.0000000 9.05479 39.6% 31.3 6s Explored 2328 nodes (61820 simplex iterations) in 7.64 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.500000000000e+01, best bound 1.500000000000e+01, gap 0.0%