Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:30:33 2012 Optimize a model with 284 rows, 795 columns and 795 nonzeros Model has 566 quadratic constraints Presolve removed 0 rows and 11 columns Presolve time: 3.30s Presolved: 284 rows, 784 columns, 784 nonzeros Variable types: 566 continuous, 218 integer (217 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 0 130.0000000 - - - 3s 0 0 0.00000 0 53 130.00000 0.00000 100% - 3s 0 0 0.00000 0 163 130.00000 0.00000 100% - 3s 0 0 0.00000 0 149 130.00000 0.00000 100% - 3s 0 2 0.00000 0 148 130.00000 0.00000 100% - 3s H 54 54 30.0000000 2.48388 91.7% 36.4 3s H 81 70 28.0000000 2.48388 91.1% 30.8 3s H 279 174 25.0000000 4.48748 82.1% 26.6 3s * 281 171 21 24.0000000 4.48748 81.3% 27.0 3s 606 327 7.28571 14 469 24.00000 7.28571 69.6% 28.1 5s * 1194 452 46 23.0000000 9.14876 60.2% 40.4 7s * 1204 410 50 22.0000000 9.14876 58.4% 40.3 7s 2187 486 cutoff 40 22.00000 13.21341 39.9% 37.7 10s 3385 612 18.00000 37 458 22.00000 15.00000 31.8% 36.3 15s 4348 621 18.76216 40 456 22.00000 16.10345 26.8% 35.1 20s 5743 531 18.47674 39 467 22.00000 17.47619 20.6% 33.8 25s 7002 253 20.43478 40 360 22.00000 18.71429 14.9% 33.3 30s Explored 7608 nodes (252018 simplex iterations) in 31.73 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.200000000000e+01, best bound 2.200000000000e+01, gap 0.0%