Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:03:19 2012 Optimize a model with 217 rows, 631 columns and 631 nonzeros Model has 432 quadratic constraints Presolve removed 0 rows and 23 columns Presolve time: 2.52s Presolved: 217 rows, 608 columns, 608 nonzeros Variable types: 432 continuous, 176 integer (175 binary) Root relaxation: objective 0.000000e+00, 77 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 103.0000000 - - - 2s 0 0 0.00000 0 3 103.00000 0.00000 100% - 2s 0 0 0.00000 0 59 103.00000 0.00000 100% - 2s 0 0 0.00000 0 51 103.00000 0.00000 100% - 2s 0 2 0.00000 0 51 103.00000 0.00000 100% - 2s H 36 36 16.0000000 0.78947 95.1% 37.9 2s * 49 36 33 15.0000000 0.78947 94.7% 34.1 2s * 146 84 26 14.0000000 4.41667 68.5% 20.4 2s 607 240 8.64000 13 586 14.00000 8.64000 38.3% 19.3 5s * 767 252 44 12.0000000 8.64000 28.0% 26.7 5s Explored 863 nodes (24721 simplex iterations) in 5.75 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.200000000000e+01, best bound 1.200000000000e+01, gap 0.0%