Gurobi 5.0.1 (linux64) logging started Fri Nov 16 14:03:27 2012 Optimize a model with 19757 rows, 5550 columns and 64452 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.72s Presolved: 19755 rows, 5548 columns, 63918 nonzeros Variable types: 0 continuous, 5548 integer (5548 binary) Found heuristic solution: objective 74.0000000 Root relaxation: objective 2.000000e+00, 4082 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 0 148 74.00000 2.00000 97.3% - 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 3806 5.00000 3.00000 40.0% - 14s 0 0 3.00000 0 3806 5.00000 3.00000 40.0% - 26s 0 2 3.00000 0 3806 5.00000 3.00000 40.0% - 48s 2 2 infeasible 2 5.00000 3.00000 40.0% 13995 50s * 34 4 28 4.0000000 3.00000 25.0% 1364 54s Cutting planes: Clique: 45 Zero half: 1 Explored 35 nodes (114392 simplex iterations) in 58.59 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%