Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:59:24 2012 Optimize a model with 218 rows, 628 columns and 628 nonzeros Model has 434 quadratic constraints Presolve removed 0 rows and 18 columns Presolve time: 2.55s Presolved: 218 rows, 610 columns, 610 nonzeros Variable types: 434 continuous, 176 integer (175 binary) Root relaxation: objective 0.000000e+00, 77 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 106.0000000 - - - 2s 0 0 0.00000 0 33 106.00000 0.00000 100% - 2s 0 0 0.00000 0 72 106.00000 0.00000 100% - 2s 0 0 0.00000 0 72 106.00000 0.00000 100% - 2s 0 2 0.00000 0 32 106.00000 0.00000 100% - 2s H 52 52 22.0000000 1.71429 92.2% 30.6 2s H 54 50 20.0000000 1.71429 91.4% 30.1 2s * 100 71 40 18.0000000 2.03279 88.7% 22.9 2s * 461 202 18 16.0000000 5.55172 65.3% 15.3 2s H 568 141 14.0000000 5.89075 57.9% 14.7 3s * 740 199 30 13.0000000 6.66953 48.7% 20.1 4s 903 182 11.54412 24 374 13.00000 7.37908 43.2% 23.8 5s * 961 169 40 12.0000000 7.37908 38.5% 26.4 5s Explored 1093 nodes (30593 simplex iterations) in 5.45 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.200000000000e+01, best bound 1.200000000000e+01, gap 0.0%