Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:04:35 2012 Optimize a model with 201 rows, 601 columns and 601 nonzeros Model has 400 quadratic constraints Presolve removed 0 rows and 27 columns Presolve time: 2.33s Presolved: 201 rows, 574 columns, 574 nonzeros Variable types: 400 continuous, 174 integer (173 binary) Root relaxation: objective 0.000000e+00, 71 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 106.0000000 - - - 2s 0 0 0.00000 0 9 106.00000 0.00000 100% - 2s 0 0 0.00000 0 47 106.00000 0.00000 100% - 2s 0 0 0.00000 0 29 106.00000 0.00000 100% - 2s 0 2 0.00000 0 9 106.00000 0.00000 100% - 2s H 27 27 15.0000000 1.24138 91.7% 66.2 2s H 32 32 14.0000000 1.24138 91.1% 56.4 2s H 99 44 13.0000000 1.93548 85.1% 25.4 2s * 99 36 20 12.0000000 1.93548 83.9% 25.4 2s H 117 37 10.0000000 1.96591 80.3% 24.7 2s * 117 32 16 9.0000000 1.96591 78.2% 24.7 2s H 193 58 9.0000000 3.38710 62.4% 23.3 2s * 801 127 16 8.0000000 6.52115 18.5% 25.1 3s Explored 1018 nodes (31048 simplex iterations) in 4.43 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0%