Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:36:05 2012 Optimize a model with 264 rows, 744 columns and 744 nonzeros Model has 526 quadratic constraints Presolve removed 0 rows and 23 columns Presolve time: 3.07s Presolved: 264 rows, 721 columns, 721 nonzeros Variable types: 526 continuous, 195 integer (194 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 0 124.0000000 - - - 3s 0 0 0.00000 0 2 124.00000 0.00000 100% - 3s 0 0 0.00000 0 2 124.00000 0.00000 100% - 3s 0 0 0.00000 0 121 124.00000 0.00000 100% - 3s 0 2 0.00000 0 115 124.00000 0.00000 100% - 3s * 31 31 22 30.0000000 2.08108 93.1% 48.0 3s H 89 76 29.0000000 2.10227 92.8% 28.4 3s * 90 75 36 28.0000000 2.10227 92.5% 29.6 3s * 169 128 34 26.0000000 3.70588 85.7% 24.2 3s * 170 121 34 25.0000000 3.70588 85.2% 24.2 3s * 441 249 46 24.0000000 7.10811 70.4% 23.3 3s 607 319 8.32283 16 708 24.00000 8.32283 65.3% 26.5 5s * 1684 500 43 23.0000000 11.00000 52.2% 32.6 7s * 1809 465 51 22.0000000 11.40625 48.2% 33.5 8s 2776 706 16.87425 34 421 22.00000 13.74286 37.5% 31.7 10s 3881 824 cutoff 36 22.00000 15.00000 31.8% 32.2 15s 4904 876 17.48864 36 436 22.00000 16.00000 27.3% 31.5 20s 6518 781 19.64336 33 435 22.00000 17.00000 22.7% 32.2 25s 7766 588 19.84615 35 427 22.00000 17.85714 18.8% 32.0 30s Explored 9500 nodes (302320 simplex iterations) in 34.79 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.200000000000e+01, best bound 2.200000000000e+01, gap 0.0%