Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:55:08 2012 Optimize a model with 247 rows, 715 columns and 715 nonzeros Model has 492 quadratic constraints Presolve removed 0 rows and 31 columns Presolve time: 2.87s Presolved: 247 rows, 684 columns, 684 nonzeros Variable types: 492 continuous, 192 integer (191 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 0 126.0000000 - - - 2s 0 0 0.00000 0 13 126.00000 0.00000 100% - 2s 0 0 0.00000 0 2 126.00000 0.00000 100% - 2s 0 0 0.00000 0 78 126.00000 0.00000 100% - 2s 0 2 0.00000 0 76 126.00000 0.00000 100% - 2s H 54 54 35.0000000 1.29882 96.3% 29.7 3s * 68 61 53 27.0000000 1.29882 95.2% 27.2 3s H 107 61 22.0000000 2.97018 86.5% 23.5 3s H 115 65 21.0000000 2.97018 85.9% 23.0 3s * 150 78 31 18.0000000 2.97674 83.5% 21.8 3s * 344 122 27 16.0000000 5.75740 64.0% 20.3 3s * 353 114 36 15.0000000 5.75740 61.6% 20.0 3s 603 167 13.33561 11 426 15.00000 7.45309 50.3% 20.1 5s Explored 2525 nodes (76232 simplex iterations) in 9.37 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%