Gurobi 5.0.1 (linux64) logging started Fri Nov 16 05:20:34 2012 Optimize a model with 7991 rows, 2970 columns and 26674 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.16s Presolved: 8043 rows, 2968 columns, 29294 nonzeros Variable types: 0 continuous, 2968 integer (2968 binary) Found heuristic solution: objective 54.0000000 Root relaxation: objective 2.000000e+00, 2216 iterations, 0.06 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 108 54.00000 2.00000 96.3% - 0s H 0 0 44.0000000 2.00000 95.5% - 0s H 0 0 4.0000000 2.00000 50.0% - 0s 0 0 2.66667 0 2477 4.00000 2.66667 33.3% - 1s 0 0 2.66667 0 1984 4.00000 2.66667 33.3% - 1s 0 0 2.66667 0 2587 4.00000 2.66667 33.3% - 1s 0 0 2.66667 0 123 4.00000 2.66667 33.3% - 4s 0 2 2.66667 0 122 4.00000 2.66667 33.3% - 5s Cutting planes: Clique: 31 Zero half: 10 Explored 27 nodes (35146 simplex iterations) in 7.29 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%