Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:10:05 2012 Optimize a model with 55 rows, 148 columns and 148 nonzeros Model has 108 quadratic constraints Presolve time: 0.63s Presolved: 55 rows, 148 columns, 148 nonzeros Variable types: 108 continuous, 40 integer (40 binary) Root relaxation: objective 0.000000e+00, 20 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 30.0000000 - - - 0s 0 0 0.00000 0 2 30.00000 0.00000 100% - 0s 0 0 0.00000 0 17 30.00000 0.00000 100% - 0s 0 0 0.00000 0 24 30.00000 0.00000 100% - 0s 0 2 0.00000 0 24 30.00000 0.00000 100% - 0s * 12 12 8 8.0000000 2.88889 63.9% 24.6 0s * 13 11 9 6.0000000 2.88889 51.9% 23.8 0s Cutting planes: Explored 115 nodes (1238 simplex iterations) in 0.67 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.000000000000e+00, best bound 6.000000000000e+00, gap 0.0%