Gurobi 5.0.1 (linux64) logging started Fri Nov 16 22:34:08 2012 Optimize a model with 38772 rows, 36672 columns and 152034 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.86s Presolved: 38961 rows, 36670 columns, 188109 nonzeros Variable types: 0 continuous, 36670 integer (36670 binary) Found heuristic solution: objective 191.0000000 Root relaxation: objective 2.000000e+00, 22954 iterations, 1.67 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 322 191.00000 2.00000 99.0% - 5s H 0 0 151.0000000 2.00000 98.7% - 5s H 0 0 4.0000000 2.00000 50.0% - 5s 0 0 2.66667 0 9000 4.00000 2.66667 33.3% - 14s H 0 0 3.0000000 2.66667 11.1% - 24s Cutting planes: Clique: 2 Zero half: 1 Explored 0 nodes (94428 simplex iterations) in 24.97 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%