Gurobi 5.0.1 (linux64) logging started Fri Nov 16 06:42:52 2012 Optimize a model with 11445 rows, 3540 columns and 37581 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.28s Presolved: 11443 rows, 3538 columns, 37193 nonzeros Variable types: 0 continuous, 3538 integer (3538 binary) Found heuristic solution: objective 59.0000000 Root relaxation: objective 2.000000e+00, 2548 iterations, 0.08 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 118 59.00000 2.00000 96.6% - 0s H 0 0 46.0000000 2.00000 95.7% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 269 5.00000 2.66667 46.7% - 1s H 0 0 4.0000000 2.66667 33.3% - 1s 0 0 2.67857 0 3087 4.00000 2.67857 33.0% - 2s 0 0 2.67857 0 3126 4.00000 2.67857 33.0% - 3s 0 0 2.67857 0 2799 4.00000 2.67857 33.0% - 8s 0 0 2.67857 0 2768 4.00000 2.67857 33.0% - 11s 0 0 2.67857 0 2767 4.00000 2.67857 33.0% - 15s 0 0 2.67857 0 2811 4.00000 2.67857 33.0% - 18s 0 0 2.67857 0 2756 4.00000 2.67857 33.0% - 22s 0 0 2.67857 0 2886 4.00000 2.67857 33.0% - 24s 0 0 2.67857 0 2832 4.00000 2.67857 33.0% - 27s 0 0 2.67857 0 2843 4.00000 2.67857 33.0% - 31s 0 0 2.67857 0 2843 4.00000 2.67857 33.0% - 32s 0 1 3.00000 0 2843 4.00000 3.00000 25.0% - 39s 3 0 infeasible 2 4.00000 4.00000 0.0% 3128 40s Cutting planes: Clique: 170 Zero half: 8 Explored 4 nodes (102497 simplex iterations) in 40.12 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%