Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:50:14 2012 Optimize a model with 172 rows, 520 columns and 520 nonzeros Model has 342 quadratic constraints Presolve removed 0 rows and 24 columns Presolve time: 1.99s Presolved: 172 rows, 496 columns, 496 nonzeros Variable types: 342 continuous, 154 integer (153 binary) Root relaxation: objective 0.000000e+00, 61 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 93.0000000 - - - 2s 0 0 0.00000 0 2 93.00000 0.00000 100% - 2s 0 0 0.00000 0 99 93.00000 0.00000 100% - 2s 0 0 0.00000 0 95 93.00000 0.00000 100% - 2s 0 2 0.00000 0 92 93.00000 0.00000 100% - 2s * 16 16 12 10.0000000 1.50000 85.0% 55.3 2s * 136 56 10 9.0000000 4.14286 54.0% 20.1 2s Explored 1519 nodes (37226 simplex iterations) in 3.79 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%