Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:10:55 2012 Optimize a model with 228 rows, 661 columns and 661 nonzeros Model has 454 quadratic constraints Presolve removed 0 rows and 22 columns Presolve time: 2.65s Presolved: 228 rows, 639 columns, 639 nonzeros Variable types: 454 continuous, 185 integer (184 binary) Root relaxation: objective 0.000000e+00, 81 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 111.0000000 - - - 2s 0 0 0.00000 0 20 111.00000 0.00000 100% - 2s 0 0 0.00000 0 3 111.00000 0.00000 100% - 2s 0 0 0.00000 0 99 111.00000 0.00000 100% - 2s 0 2 0.00000 0 99 111.00000 0.00000 100% - 2s H 40 40 20.0000000 1.90250 90.5% 34.5 2s * 48 46 36 18.0000000 1.90250 89.4% 35.0 2s * 49 41 37 17.0000000 1.90250 88.8% 34.3 2s * 353 198 23 16.0000000 5.00000 68.8% 19.8 3s * 513 182 15 14.0000000 6.14122 56.1% 20.4 3s 866 199 11.67939 18 299 14.00000 7.26415 48.1% 39.0 5s * 1853 88 29 13.0000000 10.45283 19.6% 48.7 7s Explored 2011 nodes (100410 simplex iterations) in 8.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.300000000000e+01, best bound 1.300000000000e+01, gap 0.0%