Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:13:21 2012 Optimize a model with 86 rows, 228 columns and 228 nonzeros Model has 170 quadratic constraints Presolve removed 0 rows and 1 columns Presolve time: 0.99s Presolved: 86 rows, 227 columns, 227 nonzeros Variable types: 170 continuous, 57 integer (56 binary) Root relaxation: objective 0.000000e+00, 28 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 40.0000000 - - - 0s 0 0 0.00000 0 29 40.00000 0.00000 100% - 1s 0 0 0.00000 0 50 40.00000 0.00000 100% - 1s 0 0 0.00000 0 49 40.00000 0.00000 100% - 1s 0 2 0.00000 0 49 40.00000 0.00000 100% - 1s * 35 35 20 16.0000000 2.00000 87.5% 21.5 1s * 37 30 21 15.0000000 2.00000 86.7% 20.8 1s * 58 37 15 13.0000000 2.88462 77.8% 20.2 1s * 94 42 8 11.0000000 2.97959 72.9% 22.4 1s * 312 30 9 10.0000000 8.46154 15.4% 20.3 1s Cutting planes: Explored 353 nodes (7398 simplex iterations) in 1.17 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.000000000000e+01, best bound 1.000000000000e+01, gap 0.0%