Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:49:40 2012 Optimize a model with 161 rows, 497 columns and 497 nonzeros Model has 320 quadratic constraints Presolve removed 0 rows and 24 columns Presolve time: 1.87s Presolved: 161 rows, 473 columns, 473 nonzeros Variable types: 320 continuous, 153 integer (152 binary) Root relaxation: objective 0.000000e+00, 57 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 80.0000000 - - - 1s 0 0 0.00000 0 59 80.00000 0.00000 100% - 1s 0 0 0.00000 0 86 80.00000 0.00000 100% - 1s 0 0 0.00000 0 110 80.00000 0.00000 100% - 1s 0 2 0.00000 0 109 80.00000 0.00000 100% - 1s * 23 22 15 5.0000000 0.88889 82.2% 41.8 1s H 52 28 5.0000000 1.28571 74.3% 27.9 2s * 207 23 6 4.0000000 3.00000 25.0% 16.5 2s Cutting planes: Explored 247 nodes (5696 simplex iterations) in 2.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%