Gurobi 5.0.1 (linux64) logging started Fri Nov 16 12:13:33 2012 Optimize a model with 19808 rows, 5112 columns and 64182 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.68s Presolved: 19877 rows, 5110 columns, 68665 nonzeros Variable types: 0 continuous, 5110 integer (5110 binary) Found heuristic solution: objective 71.0000000 Root relaxation: objective 2.000000e+00, 3505 iterations, 0.15 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 142 71.00000 2.00000 97.2% - 1s H 0 0 64.0000000 2.00000 96.9% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 3.00000 0 3362 5.00000 3.00000 40.0% - 19s H 0 0 4.0000000 3.00000 25.0% - 22s 0 0 infeasible 0 4.00000 3.00001 25.0% - 22s Cutting planes: Clique: 89 Zero half: 2 Explored 0 nodes (54819 simplex iterations) in 22.98 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%