Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:28:32 2012 Optimize a model with 158 rows, 389 columns and 389 nonzeros Model has 314 quadratic constraints Presolve time: 1.83s Presolved: 158 rows, 389 columns, 389 nonzeros Variable types: 314 continuous, 75 integer (75 binary) Root relaxation: objective 0.000000e+00, 37 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 79.0000000 - - - 1s 0 0 0.00000 0 67 79.00000 0.00000 100% - 1s 0 0 0.53601 0 72 79.00000 0.53601 99.3% - 1s 0 2 0.57576 0 72 79.00000 0.57576 99.3% - 1s * 38 38 23 32.0000000 4.63636 85.5% 31.0 1s * 101 63 17 28.0000000 6.16667 78.0% 32.5 1s 2256 469 23.66154 32 238 28.00000 18.68421 33.3% 27.8 5s * 5158 396 51 27.0000000 23.14286 14.3% 21.8 7s * 5161 276 49 26.0000000 23.14286 11.0% 21.8 7s Explored 5466 nodes (116310 simplex iterations) in 7.70 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.600000000000e+01, best bound 2.600000000000e+01, gap 0.0%