Gurobi 5.0.1 (linux64) logging started Sun Nov 18 09:49:32 2012 Optimize a model with 307 rows, 856 columns and 856 nonzeros Model has 612 quadratic constraints Presolve removed 0 rows and 13 columns Presolve time: 3.57s Presolved: 307 rows, 843 columns, 843 nonzeros Variable types: 612 continuous, 231 integer (230 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 0 147.0000000 - - - 3s 0 0 0.00000 0 2 147.00000 0.00000 100% - 3s 0 0 0.00000 0 2 147.00000 0.00000 100% - 3s 0 0 0.00000 0 156 147.00000 0.00000 100% - 3s 0 2 0.00000 0 155 147.00000 0.00000 100% - 3s H 38 38 30.0000000 3.00488 90.0% 44.5 3s * 47 43 31 25.0000000 3.00488 88.0% 43.0 3s H 410 211 24.0000000 5.74545 76.1% 23.1 4s * 421 201 38 23.0000000 5.74545 75.0% 23.4 4s 606 285 7.00000 16 515 23.00000 7.00000 69.6% 30.0 5s * 1515 391 38 22.0000000 12.00000 45.5% 42.9 8s 1848 434 18.23697 39 515 22.00000 12.97674 41.0% 44.1 10s 3289 468 cutoff 37 22.00000 15.92593 27.6% 42.4 15s 3811 413 20.44172 36 478 22.00000 16.84783 23.4% 42.4 20s 4126 350 18.29489 36 510 22.00000 17.24176 21.6% 42.3 25s 4645 198 cutoff 40 22.00000 18.21528 17.2% 42.5 30s Explored 5060 nodes (215929 simplex iterations) in 32.09 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%