Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:27:35 2012 Optimize a model with 256 rows, 726 columns and 726 nonzeros Model has 510 quadratic constraints Presolve removed 0 rows and 20 columns Presolve time: 2.98s Presolved: 256 rows, 706 columns, 706 nonzeros Variable types: 510 continuous, 196 integer (195 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 0 134.0000000 - - - 2s 0 0 0.00000 0 67 134.00000 0.00000 100% - 2s 0 0 0.00000 0 74 134.00000 0.00000 100% - 3s 0 0 0.00000 0 72 134.00000 0.00000 100% - 3s 0 2 0.00000 0 153 134.00000 0.00000 100% - 3s H 53 53 30.0000000 1.58169 94.7% 45.0 3s H 81 81 26.0000000 1.58169 93.9% 36.4 3s H 108 98 25.0000000 1.58169 93.7% 33.6 3s * 109 83 68 24.0000000 1.58169 93.4% 33.3 3s * 156 85 30 21.0000000 1.94750 90.7% 30.0 3s H 452 222 20.0000000 7.45269 62.7% 25.2 3s * 533 208 15 19.0000000 8.05461 57.6% 25.3 3s * 548 178 17 18.0000000 8.15079 54.7% 25.4 3s 707 203 9.62070 10 680 18.00000 9.62070 46.6% 29.5 5s 2776 522 17.46251 36 404 18.00000 11.96682 33.5% 35.4 10s 5242 388 17.08387 36 382 18.00000 14.96154 16.9% 34.3 15s Explored 6345 nodes (211532 simplex iterations) in 16.86 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.800000000000e+01, best bound 1.800000000000e+01, gap 0.0%