Gurobi 5.0.1 (linux64) logging started Fri Nov 16 14:57:06 2012 Optimize a model with 20595 rows, 5852 columns and 67258 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.73s Presolved: 20669 rows, 5850 columns, 72492 nonzeros Variable types: 0 continuous, 5850 integer (5850 binary) Found heuristic solution: objective 76.0000000 Root relaxation: objective 2.000000e+00, 4283 iterations, 0.19 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 152 76.00000 2.00000 97.4% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 3.00000 0 3663 5.00000 3.00000 40.0% - 26s H 0 0 4.0000000 3.00000 25.0% - 30s 0 0 3.00000 0 3663 4.00000 3.00000 25.0% - 37s 0 2 3.00000 0 3663 4.00000 3.00000 25.0% - 55s Cutting planes: Clique: 46 Zero half: 1 Explored 1 nodes (108285 simplex iterations) in 66.39 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%