Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:51:16 2012 Optimize a model with 262 rows, 744 columns and 744 nonzeros Model has 522 quadratic constraints Presolve removed 0 rows and 24 columns Presolve time: 3.04s Presolved: 262 rows, 720 columns, 720 nonzeros Variable types: 522 continuous, 198 integer (197 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 0 141.0000000 - - - 3s 0 0 0.00000 0 2 141.00000 0.00000 100% - 3s 0 0 0.00000 0 5 141.00000 0.00000 100% - 3s 0 0 0.00000 0 120 141.00000 0.00000 100% - 3s 0 2 0.00000 0 118 141.00000 0.00000 100% - 3s H 27 27 115.0000000 2.48387 97.8% 52.3 3s H 40 40 28.0000000 2.48387 91.1% 38.1 3s * 42 41 32 27.0000000 2.48387 90.8% 40.7 3s * 141 112 47 26.0000000 2.80392 89.2% 25.0 3s H 185 131 24.0000000 3.50000 85.4% 26.0 3s 607 360 6.81928 11 699 24.00000 6.81928 71.6% 29.1 5s * 904 459 42 23.0000000 6.81928 70.4% 36.0 6s * 990 457 43 22.0000000 7.00000 68.2% 36.2 6s * 1099 401 35 21.0000000 7.41954 64.7% 36.9 6s 2469 640 18.00000 28 408 21.00000 12.10909 42.3% 36.8 10s * 2644 620 31 20.0000000 12.51724 37.4% 36.3 10s 3251 655 18.86624 32 400 20.00000 13.50000 32.5% 35.4 15s 4141 614 19.00000 30 409 20.00000 14.50000 27.5% 36.2 20s 5628 400 19.00000 31 410 20.00000 16.00000 20.0% 35.4 25s Explored 6457 nodes (233202 simplex iterations) in 27.96 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.000000000000e+01, best bound 2.000000000000e+01, gap 0.0%