Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:39:53 2012 Optimize a model with 235 rows, 687 columns and 687 nonzeros Model has 468 quadratic constraints Presolve removed 0 rows and 25 columns Presolve time: 2.73s Presolved: 235 rows, 662 columns, 662 nonzeros Variable types: 468 continuous, 194 integer (193 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 0 109.0000000 - - - 2s 0 0 0.00000 0 85 109.00000 0.00000 100% - 2s 0 0 0.00000 0 116 109.00000 0.00000 100% - 2s 0 0 0.00000 0 116 109.00000 0.00000 100% - 2s 0 2 0.00000 0 116 109.00000 0.00000 100% - 2s H 40 40 25.0000000 1.54839 93.8% 30.4 3s * 47 47 35 23.0000000 1.54839 93.3% 28.3 3s * 115 77 32 22.0000000 2.28571 89.6% 19.1 3s * 147 84 29 19.0000000 2.72222 85.7% 18.2 3s * 249 95 29 17.0000000 3.20000 81.2% 16.4 3s H 515 138 15.0000000 5.48872 63.4% 18.2 3s 836 185 13.15768 21 481 15.00000 6.14035 59.1% 30.8 5s 3746 119 cutoff 36 15.00000 14.69444 2.04% 31.1 10s Explored 3968 nodes (120237 simplex iterations) in 10.16 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%