Gurobi 5.0.1 (linux64) logging started Fri Nov 16 13:24:37 2012 Optimize a model with 17300 rows, 5402 columns and 56938 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.61s Presolved: 17371 rows, 5400 columns, 61793 nonzeros Variable types: 0 continuous, 5400 integer (5400 binary) Found heuristic solution: objective 73.0000000 Root relaxation: objective 2.000000e+00, 3910 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 0 146 73.00000 2.00000 97.3% - 1s H 0 0 70.0000000 2.00000 97.1% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 2.66667 0 539 5.00000 2.66667 46.7% - 8s 0 0 2.68599 0 4719 5.00000 2.68599 46.3% - 9s 0 0 2.68599 0 4741 5.00000 2.68599 46.3% - 12s 0 0 2.68599 0 4341 5.00000 2.68599 46.3% - 19s 0 0 2.68599 0 4118 5.00000 2.68599 46.3% - 23s 0 0 2.68599 0 4148 5.00000 2.68599 46.3% - 26s 0 0 2.68599 0 4061 5.00000 2.68599 46.3% - 30s 0 0 2.68599 0 4126 5.00000 2.68599 46.3% - 32s 0 0 2.68599 0 4072 5.00000 2.68599 46.3% - 35s 0 0 2.68599 0 4053 5.00000 2.68599 46.3% - 39s H 0 0 4.0000000 2.68599 32.9% - 39s 0 0 2.68599 0 4086 4.00000 2.68599 32.9% - 42s 0 0 2.68599 0 4086 4.00000 2.68599 32.9% - 43s 0 1 3.00000 0 4086 4.00000 3.00000 25.0% - 64s 3 0 infeasible 2 4.00000 4.00000 0.0% 2235 65s Cutting planes: Clique: 272 Zero half: 6 Explored 4 nodes (121239 simplex iterations) in 65.18 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%