Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:36:36 2012 Optimize a model with 292 rows, 812 columns and 812 nonzeros Model has 582 quadratic constraints Presolve removed 0 rows and 15 columns Presolve time: 3.40s Presolved: 292 rows, 797 columns, 797 nonzeros Variable types: 582 continuous, 215 integer (214 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 0 144.0000000 - - - 3s 0 0 0.00000 0 4 144.00000 0.00000 100% - 3s 0 0 0.00000 0 69 144.00000 0.00000 100% - 3s 0 0 0.00000 0 4 144.00000 0.00000 100% - 3s 0 2 0.00000 0 3 144.00000 0.00000 100% - 3s H 54 54 33.0000000 0.92632 97.2% 45.9 3s * 135 74 36 28.0000000 1.00000 96.4% 30.8 3s H 327 199 27.0000000 1.26923 95.3% 30.3 4s * 329 173 34 26.0000000 1.26923 95.1% 30.2 4s 649 331 24.12195 34 453 26.00000 6.23611 76.0% 38.9 5s * 1709 381 49 25.0000000 14.00000 44.0% 35.8 8s * 1957 429 42 24.0000000 14.97500 37.6% 34.4 8s 2600 540 17.48438 29 479 24.00000 15.86076 33.9% 31.8 10s H 3380 558 23.0000000 16.81818 26.9% 30.1 11s 3846 561 21.96951 32 411 23.00000 17.24309 25.0% 29.9 15s 4268 535 20.06667 31 448 23.00000 17.78151 22.7% 29.6 20s 5763 312 cutoff 30 23.00000 19.30233 16.1% 28.5 25s Explored 6418 nodes (183827 simplex iterations) in 27.46 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.300000000000e+01, best bound 2.300000000000e+01, gap 0.0%