Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:59:53 2012 Optimize a model with 262 rows, 746 columns and 746 nonzeros Model has 522 quadratic constraints Presolve removed 0 rows and 22 columns Presolve time: 3.04s Presolved: 262 rows, 724 columns, 724 nonzeros Variable types: 522 continuous, 202 integer (201 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 0 135.0000000 - - - 3s 0 0 0.00000 0 2 135.00000 0.00000 100% - 3s 0 0 0.00000 0 4 135.00000 0.00000 100% - 3s 0 0 0.00000 0 115 135.00000 0.00000 100% - 3s 0 2 0.00000 0 109 135.00000 0.00000 100% - 3s H 16 16 114.0000000 2.51613 97.8% 82.2 3s H 54 54 24.0000000 2.51613 89.5% 32.9 3s H 54 54 23.0000000 2.51613 89.1% 32.9 3s * 354 197 38 21.0000000 4.92135 76.6% 18.3 3s 617 339 8.90306 20 448 21.00000 6.91579 67.1% 25.2 5s * 745 368 48 20.0000000 6.91579 65.4% 36.6 5s * 977 400 50 19.0000000 6.91579 63.6% 35.8 6s * 1338 371 45 18.0000000 9.10000 49.4% 34.4 7s 2627 373 16.86916 38 458 18.00000 12.00000 33.3% 32.1 10s 3579 304 16.07692 40 358 18.00000 13.18182 26.8% 31.8 15s Explored 4833 nodes (152945 simplex iterations) in 18.90 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%