Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:18:52 2012 Optimize a model with 90 rows, 238 columns and 238 nonzeros Model has 178 quadratic constraints Presolve removed 0 rows and 1 columns Presolve time: 1.05s Presolved: 90 rows, 237 columns, 237 nonzeros Variable types: 178 continuous, 59 integer (58 binary) Root relaxation: objective 0.000000e+00, 30 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 44.0000000 - - - 1s 0 0 0.00000 0 15 44.00000 0.00000 100% - 1s 0 0 0.00000 0 4 44.00000 0.00000 100% - 1s 0 0 0.00000 0 42 44.00000 0.00000 100% - 1s 0 2 0.00000 0 42 44.00000 0.00000 100% - 1s * 26 26 18 16.0000000 3.00000 81.2% 28.2 1s H 41 31 15.0000000 3.68182 75.5% 24.6 1s * 65 42 14 14.0000000 4.41176 68.5% 20.4 1s H 88 41 13.0000000 4.43243 65.9% 19.0 1s * 90 33 8 12.0000000 4.43243 63.1% 18.9 1s * 139 25 10 11.0000000 4.92857 55.2% 17.5 1s Cutting planes: Explored 257 nodes (4993 simplex iterations) in 1.19 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.100000000000e+01, best bound 1.100000000000e+01, gap 0.0%