Gurobi 5.0.1 (linux64) logging started Sun Nov 18 08:15:14 2012 Optimize a model with 291 rows, 815 columns and 815 nonzeros Model has 580 quadratic constraints Presolve removed 0 rows and 16 columns Presolve time: 3.38s Presolved: 291 rows, 799 columns, 799 nonzeros Variable types: 580 continuous, 219 integer (218 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 0 140.0000000 - - - 3s 0 0 0.00000 0 2 140.00000 0.00000 100% - 3s 0 0 0.00000 0 4 140.00000 0.00000 100% - 3s 0 0 0.00000 0 115 140.00000 0.00000 100% - 3s 0 2 0.00000 0 107 140.00000 0.00000 100% - 3s H 38 38 24.0000000 2.22892 90.7% 61.2 3s * 38 38 27 23.0000000 2.22892 90.3% 61.2 3s * 40 36 26 22.0000000 2.22892 89.9% 58.9 3s H 81 72 20.0000000 2.24691 88.8% 39.4 3s * 94 75 45 19.0000000 2.24691 88.2% 37.9 3s 651 256 12.94898 20 462 19.00000 9.00000 52.6% 37.8 5s * 826 265 51 17.0000000 9.00000 47.1% 44.3 5s * 912 221 38 16.0000000 9.00000 43.8% 43.7 6s Explored 1088 nodes (48441 simplex iterations) in 6.69 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.600000000000e+01, best bound 1.600000000000e+01, gap 0.0%