Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:08:09 2012 Optimize a model with 239 rows, 680 columns and 680 nonzeros Model has 476 quadratic constraints Presolve removed 0 rows and 16 columns Presolve time: 2.77s Presolved: 239 rows, 664 columns, 664 nonzeros Variable types: 476 continuous, 188 integer (187 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 0 104.0000000 - - - 2s 0 0 0.00000 0 79 104.00000 0.00000 100% - 2s 0 0 0.00000 0 112 104.00000 0.00000 100% - 2s 0 0 0.00000 0 84 104.00000 0.00000 100% - 2s 0 2 0.00000 0 84 104.00000 0.00000 100% - 2s H 40 40 27.0000000 1.26316 95.3% 30.7 3s * 50 50 36 25.0000000 1.26316 94.9% 30.0 3s H 92 67 21.0000000 2.30488 89.0% 28.0 3s * 92 64 29 20.0000000 2.30488 88.5% 28.2 3s H 119 83 19.0000000 2.62963 86.2% 25.3 3s H 162 111 18.0000000 3.00000 83.3% 25.4 3s H 188 113 17.0000000 3.47826 79.5% 26.8 3s * 188 95 18 16.0000000 3.47826 78.3% 26.8 3s 711 244 7.20000 27 419 16.00000 7.20000 55.0% 34.1 5s * 1151 183 43 15.0000000 8.84615 41.0% 31.8 5s Explored 1534 nodes (51146 simplex iterations) in 6.53 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%