Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:55:23 2012 Optimize a model with 261 rows, 752 columns and 752 nonzeros Model has 520 quadratic constraints Presolve removed 0 rows and 13 columns Presolve time: 3.04s Presolved: 261 rows, 739 columns, 739 nonzeros Variable types: 520 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 0 128.0000000 - - - 3s 0 0 0.00000 0 37 128.00000 0.00000 100% - 3s 0 0 0.00000 0 146 128.00000 0.00000 100% - 3s 0 0 0.00000 0 139 128.00000 0.00000 100% - 3s 0 2 0.00000 0 137 128.00000 0.00000 100% - 3s H 42 42 20.0000000 1.85455 90.7% 39.2 3s * 50 48 31 18.0000000 1.85455 89.7% 40.7 3s * 196 85 22 15.0000000 3.97439 73.5% 23.6 3s 608 156 8.56473 11 684 15.00000 8.56473 42.9% 27.6 5s * 644 168 29 14.0000000 8.56473 38.8% 29.9 5s Explored 1222 nodes (52895 simplex iterations) in 7.17 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.400000000000e+01, best bound 1.400000000000e+01, gap 0.0%