Gurobi 5.0.1 (linux64) logging started Sun Nov 18 08:05:35 2012 Optimize a model with 304 rows, 840 columns and 840 nonzeros Model has 606 quadratic constraints Presolve removed 0 rows and 21 columns Presolve time: 3.54s Presolved: 304 rows, 819 columns, 819 nonzeros Variable types: 606 continuous, 213 integer (212 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 0 174.0000000 - - - 3s 0 0 0.00000 0 52 174.00000 0.00000 100% - 3s 0 0 0.00000 0 70 174.00000 0.00000 100% - 3s 0 0 0.00000 0 173 174.00000 0.00000 100% - 3s 0 2 0.00000 0 173 174.00000 0.00000 100% - 3s H 54 54 81.0000000 3.45178 95.7% 41.3 3s * 72 64 42 34.0000000 3.45178 89.8% 34.3 3s H 117 92 31.0000000 4.80846 84.5% 28.9 3s * 136 100 45 30.0000000 4.80846 84.0% 29.2 4s H 409 182 28.0000000 9.39294 66.5% 27.8 4s 607 267 11.39270 12 793 28.00000 11.39270 59.3% 33.6 5s H 1994 448 27.0000000 15.25714 43.5% 37.1 9s * 2118 412 58 26.0000000 15.60465 40.0% 36.7 9s 2247 424 21.62069 35 462 26.00000 16.13904 37.9% 36.6 10s 3849 410 24.72316 37 466 26.00000 19.35623 25.6% 36.8 15s 4296 369 21.21429 34 503 26.00000 20.00000 23.1% 36.4 20s 4693 318 23.12987 35 470 26.00000 20.58142 20.8% 36.6 25s Explored 5637 nodes (204624 simplex iterations) in 29.66 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.600000000000e+01, best bound 2.600000000000e+01, gap 0.0%