Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:11:26 2012 Optimize a model with 1 rows, 50 columns and 50 nonzeros Model has 64 quadratic objective terms Presolve removed 0 rows and 2 columns Presolve time: 0.00s Presolved: 65 rows, 112 columns, 240 nonzeros Variable types: 0 continuous, 112 integer (111 binary) Found heuristic solution: objective 22.0000000 Root relaxation: objective 0.000000e+00, 78 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 23 22.00000 0.00000 100% - 0s 0 0 0.00000 0 18 22.00000 0.00000 100% - 0s H 0 0 18.0000000 0.00000 100% - 0s 0 0 0.00000 0 40 18.00000 0.00000 100% - 0s 0 0 0.00000 0 12 18.00000 0.00000 100% - 0s H 0 0 12.0000000 0.00000 100% - 0s 0 2 0.00000 0 12 12.00000 0.00000 100% - 0s H 64 45 11.0000000 0.00000 100% 2.7 0s H 81 57 10.0000000 0.00000 100% 2.4 0s H 133 84 9.0000000 0.00000 100% 4.0 0s H 201 94 8.0000000 0.00000 100% 6.6 0s * 203 81 15 7.0000000 0.00000 100% 6.5 0s * 213 56 8 6.0000000 1.00000 83.3% 7.8 0s Cutting planes: Cover: 120 MIR: 1 Explored 275 nodes (3964 simplex iterations) in 0.06 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.000000000000e+00, best bound 6.000000000000e+00, gap 0.0%