Gurobi 5.0.1 (linux64) logging started Sun Nov 18 09:50:12 2012 Optimize a model with 291 rows, 824 columns and 824 nonzeros Model has 580 quadratic constraints Presolve removed 0 rows and 18 columns Presolve time: 3.36s Presolved: 291 rows, 806 columns, 806 nonzeros Variable types: 580 continuous, 226 integer (225 binary) Root relaxation: objective 0.000000e+00, 83 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 148.0000000 - - - 3s 0 0 0.00000 0 166 148.00000 0.00000 100% - 3s 0 0 0.16699 0 195 148.00000 0.16699 100% - 3s 0 2 0.25000 0 195 148.00000 0.25000 100% - 3s * 34 34 18 20.0000000 2.54286 87.3% 36.4 3s 673 261 19.58065 22 589 20.00000 10.09756 49.5% 40.7 5s 2770 485 19.55285 31 399 20.00000 12.72973 36.4% 31.0 10s 5235 613 18.97207 31 484 20.00000 15.23515 23.8% 28.1 15s * 6884 280 41 19.0000000 16.56629 12.8% 27.0 18s Explored 7201 nodes (193916 simplex iterations) in 18.57 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.900000000000e+01, best bound 1.900000000000e+01, gap 0.0%