Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:06:54 2012 Optimize a model with 222 rows, 645 columns and 645 nonzeros Model has 442 quadratic constraints Presolve removed 0 rows and 22 columns Presolve time: 2.58s Presolved: 222 rows, 623 columns, 623 nonzeros Variable types: 442 continuous, 181 integer (180 binary) Root relaxation: objective 0.000000e+00, 79 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 106.0000000 - - - 2s 0 0 0.00000 0 14 106.00000 0.00000 100% - 2s 0 0 0.00000 0 15 106.00000 0.00000 100% - 2s 0 0 0.00000 0 14 106.00000 0.00000 100% - 2s 0 2 0.00000 0 142 106.00000 0.00000 100% - 2s H 38 36 18.0000000 2.38686 86.7% 55.1 2s H 108 68 17.0000000 2.83006 83.4% 29.3 2s * 158 101 25 16.0000000 3.19444 80.0% 28.1 2s * 251 111 14 15.0000000 3.62424 75.8% 22.8 2s * 894 263 40 13.0000000 5.93684 54.3% 31.9 4s 973 235 7.98986 31 335 13.00000 6.27760 51.7% 31.9 5s Explored 1336 nodes (43620 simplex iterations) in 5.64 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.300000000000e+01, best bound 1.300000000000e+01, gap 0.0%