Gurobi 5.0.1 (linux64) logging started Sun Nov 18 00:28:31 2012 Optimize a model with 128 rows, 305 columns and 305 nonzeros Model has 254 quadratic constraints Presolve time: 1.50s Presolved: 128 rows, 305 columns, 305 nonzeros Variable types: 254 continuous, 51 integer (51 binary) Root relaxation: objective 0.000000e+00, 25 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 61.0000000 - - - 1s 0 0 0.00000 0 42 61.00000 0.00000 100% - 1s 0 0 0.41240 0 49 61.00000 0.41240 99.3% - 1s 0 2 0.46746 0 49 61.00000 0.46746 99.2% - 1s * 42 36 23 31.0000000 2.77679 91.0% 27.3 1s H 147 91 30.0000000 9.03846 69.9% 33.1 1s H 470 126 29.0000000 15.44444 46.7% 28.3 1s H 593 119 28.0000000 18.25863 34.8% 27.6 1s * 1181 2 14 27.0000000 26.70588 1.09% 26.7 2s Cutting planes: Gomory: 1 Explored 1185 nodes (32176 simplex iterations) in 2.32 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.700000000000e+01, best bound 2.700000000000e+01, gap 0.0%