Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:39:31 2012 Optimize a model with 1 rows, 170 columns and 170 nonzeros Model has 150 quadratic objective terms Presolve removed 0 rows and 32 columns Presolve time: 0.00s Presolved: 151 rows, 288 columns, 588 nonzeros Variable types: 0 continuous, 288 integer (287 binary) Found heuristic solution: objective 37.0000000 Root relaxation: objective 0.000000e+00, 183 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 37 37.00000 0.00000 100% - 0s 0 0 0.00000 0 36 37.00000 0.00000 100% - 0s H 0 0 26.0000000 0.00000 100% - 0s 0 0 0.00000 0 36 26.00000 0.00000 100% - 0s 0 0 0.00000 0 17 26.00000 0.00000 100% - 0s H 0 0 17.0000000 0.00000 100% - 0s 0 0 0.00000 0 18 17.00000 0.00000 100% - 0s H 0 0 13.0000000 0.00000 100% - 0s 0 0 0.00000 0 17 13.00000 0.00000 100% - 0s 0 0 0.00000 0 25 13.00000 0.00000 100% - 0s 0 0 0.00000 0 21 13.00000 0.00000 100% - 0s 0 0 0.00000 0 16 13.00000 0.00000 100% - 0s 0 0 0.00000 0 13 13.00000 0.00000 100% - 0s H 0 0 9.0000000 0.00000 100% - 0s 0 0 0.00000 0 11 9.00000 0.00000 100% - 0s 0 0 0.00000 0 15 9.00000 0.00000 100% - 0s 0 0 0.00000 0 14 9.00000 0.00000 100% - 0s 0 2 0.00000 0 14 9.00000 0.00000 100% - 0s H 325 151 8.0000000 0.00000 100% 3.3 0s H 573 225 6.0000000 0.00000 100% 7.9 0s * 609 171 12 5.0000000 0.00000 100% 8.6 0s * 673 97 16 4.0000000 2.00000 50.0% 13.9 0s Cutting planes: Gomory: 1 Cover: 270 MIR: 4 Explored 771 nodes (14020 simplex iterations) in 0.31 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%