Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:02:39 2012 Optimize a model with 223 rows, 642 columns and 642 nonzeros Model has 444 quadratic constraints Presolve removed 0 rows and 22 columns Presolve time: 2.59s Presolved: 223 rows, 620 columns, 620 nonzeros Variable types: 444 continuous, 176 integer (175 binary) Root relaxation: objective 0.000000e+00, 79 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 122.0000000 - - - 2s 0 0 0.00000 0 60 122.00000 0.00000 100% - 2s 0 0 0.00000 0 102 122.00000 0.00000 100% - 2s 0 0 0.00000 0 102 122.00000 0.00000 100% - 2s 0 2 0.00000 0 102 122.00000 0.00000 100% - 2s H 27 27 20.0000000 1.97389 90.1% 32.4 2s * 53 49 43 19.0000000 1.97389 89.6% 21.2 2s * 77 43 22 15.0000000 2.03263 86.4% 23.0 2s H 244 108 14.0000000 3.87574 72.3% 19.8 2s * 245 99 16 13.0000000 3.87574 70.2% 20.4 2s * 430 110 13 12.0000000 5.36338 55.3% 20.7 3s Cutting planes: Gomory: 2 Explored 1035 nodes (23855 simplex iterations) in 3.63 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.200000000000e+01, best bound 1.200000000000e+01, gap 0.0%