Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:38:34 2012 Optimize a model with 50 rows, 128 columns and 128 nonzeros Model has 98 quadratic constraints Presolve time: 0.57s Presolved: 50 rows, 128 columns, 128 nonzeros Variable types: 98 continuous, 30 integer (30 binary) Root relaxation: objective 0.000000e+00, 15 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 31.0000000 - - - 0s 0 0 0.00000 0 15 31.00000 0.00000 100% - 0s 0 0 0.00000 0 26 31.00000 0.00000 100% - 0s 0 0 0.00000 0 26 31.00000 0.00000 100% - 0s 0 2 0.03529 0 26 31.00000 0.03529 100% - 0s * 22 22 15 16.0000000 2.66667 83.3% 14.9 0s * 38 30 11 13.0000000 2.81250 78.4% 13.4 0s * 39 29 12 12.0000000 2.81250 76.6% 13.2 0s * 50 32 9 11.0000000 4.66667 57.6% 13.0 0s * 64 23 9 9.0000000 4.66667 48.1% 11.6 0s Cutting planes: Gomory: 1 Explored 154 nodes (1837 simplex iterations) in 0.61 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.000000000000e+00, best bound 9.000000000000e+00, gap 0.0%