Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:03:54 2012 Optimize a model with 227 rows, 652 columns and 652 nonzeros Model has 452 quadratic constraints Presolve removed 0 rows and 19 columns Presolve time: 2.64s Presolved: 227 rows, 633 columns, 633 nonzeros Variable types: 452 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 0 111.0000000 - - - 2s 0 0 0.00000 0 31 111.00000 0.00000 100% - 2s 0 0 0.00000 0 36 111.00000 0.00000 100% - 2s 0 0 0.00000 0 136 111.00000 0.00000 100% - 2s 0 2 0.00000 0 134 111.00000 0.00000 100% - 2s H 47 47 27.0000000 2.51497 90.7% 32.1 2s * 54 52 33 23.0000000 2.51497 89.1% 34.0 2s H 128 82 17.0000000 2.66449 84.3% 26.5 2s * 325 159 28 16.0000000 4.09784 74.4% 20.1 3s 871 346 15.97827 37 210 16.00000 6.95238 56.5% 32.1 5s * 1019 289 37 15.0000000 8.35294 44.3% 31.0 5s Explored 1773 nodes (55030 simplex iterations) in 6.48 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.500000000000e+01, best bound 1.500000000000e+01, gap 0.0%