Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:58:00 2012 Optimize a model with 213 rows, 616 columns and 616 nonzeros Model has 424 quadratic constraints Presolve removed 0 rows and 20 columns Presolve time: 2.47s Presolved: 213 rows, 596 columns, 596 nonzeros Variable types: 424 continuous, 172 integer (171 binary) Root relaxation: objective 0.000000e+00, 75 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 100.0000000 - - - 2s 0 0 0.00000 0 2 100.00000 0.00000 100% - 2s 0 0 0.00000 0 3 100.00000 0.00000 100% - 2s 0 0 0.00000 0 3 100.00000 0.00000 100% - 2s 0 2 0.00000 0 4 100.00000 0.00000 100% - 2s H 38 38 21.0000000 0.23140 98.9% 42.1 2s H 112 71 18.0000000 1.00000 94.4% 28.0 2s H 188 99 17.0000000 1.29730 92.4% 25.5 2s H 383 114 15.0000000 2.34481 84.4% 24.3 2s * 804 217 47 14.0000000 5.97279 57.3% 34.8 4s * 941 153 33 13.0000000 8.43349 35.1% 34.5 4s Explored 1010 nodes (34983 simplex iterations) in 4.74 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.300000000000e+01, best bound 1.300000000000e+01, gap 0.0%