Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:12:17 2012 Optimize a model with 72 rows, 196 columns and 196 nonzeros Model has 142 quadratic constraints Presolve removed 0 rows and 1 columns Presolve time: 0.83s Presolved: 72 rows, 195 columns, 195 nonzeros Variable types: 142 continuous, 53 integer (52 binary) Root relaxation: objective 0.000000e+00, 27 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 33.0000000 - - - 0s 0 0 0.00000 0 21 33.00000 0.00000 100% - 0s 0 0 0.00000 0 31 33.00000 0.00000 100% - 0s 0 0 0.00000 0 28 33.00000 0.00000 100% - 0s 0 2 0.00000 0 28 33.00000 0.00000 100% - 0s * 27 27 19 15.0000000 2.40000 84.0% 20.6 0s H 54 34 13.0000000 3.69161 71.6% 13.8 0s * 61 18 6 10.0000000 3.70000 63.0% 13.7 0s * 99 19 6 8.0000000 4.65126 41.9% 12.9 0s Cutting planes: Gomory: 1 Explored 130 nodes (2201 simplex iterations) in 0.90 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0%