Gurobi 5.0.1 (linux64) logging started Sun Nov 18 04:05:12 2012 Optimize a model with 170 rows, 422 columns and 422 nonzeros Model has 338 quadratic constraints Presolve removed 0 rows and 2 columns Presolve time: 1.97s Presolved: 170 rows, 420 columns, 420 nonzeros Variable types: 338 continuous, 82 integer (81 binary) Root relaxation: objective 0.000000e+00, 40 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 89.0000000 - - - 1s 0 0 0.00000 0 30 89.00000 0.00000 100% - 1s 0 0 0.00000 0 77 89.00000 0.00000 100% - 1s 0 0 0.00000 0 77 89.00000 0.00000 100% - 2s 0 2 0.00000 0 77 89.00000 0.00000 100% - 2s H 53 53 37.0000000 3.90000 89.5% 33.9 2s * 60 60 32 36.0000000 3.90000 89.2% 31.8 2s * 166 126 29 35.0000000 4.53511 87.0% 26.0 2s H 267 196 34.0000000 5.23611 84.6% 29.5 2s H 321 215 33.0000000 5.69176 82.8% 30.9 2s 1957 702 24.27536 41 244 33.00000 16.37500 50.4% 27.4 5s * 2337 833 43 32.0000000 17.40000 45.6% 26.3 5s 5068 1672 22.37182 35 259 32.00000 20.74363 35.2% 22.4 10s 8349 2329 27.52055 42 258 32.00000 22.76910 28.8% 21.0 15s *10579 2416 46 31.0000000 23.63636 23.8% 20.4 18s 11722 2419 27.43146 36 269 31.00000 24.06383 22.4% 20.4 20s 15918 1960 29.38571 48 252 31.00000 25.87500 16.5% 19.8 25s 20496 190 29.94444 45 237 31.00000 29.10727 6.11% 19.6 30s Explored 20694 nodes (403469 simplex iterations) in 30.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%