Gurobi 5.0.1 (linux64) logging started Fri Nov 16 08:37:36 2012 Optimize a model with 14463 rows, 4160 columns and 47230 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.43s Presolved: 14461 rows, 4158 columns, 46778 nonzeros Variable types: 0 continuous, 4158 integer (4158 binary) Found heuristic solution: objective 64.0000000 Root relaxation: objective 2.000000e+00, 3007 iterations, 0.11 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 128 64.00000 2.00000 96.9% - 0s H 0 0 56.0000000 2.00000 96.4% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 545 5.00000 2.66667 46.7% - 2s 0 0 2.66667 0 3673 5.00000 2.66667 46.7% - 3s 0 0 2.66667 0 211 5.00000 2.66667 46.7% - 8s H 0 0 4.0000000 2.66667 33.3% - 9s 0 0 2.67391 0 3211 4.00000 2.67391 33.2% - 11s 0 0 2.67391 0 3282 4.00000 2.67391 33.2% - 12s 0 0 2.67391 0 3328 4.00000 2.67391 33.2% - 14s 0 0 2.67391 0 3320 4.00000 2.67391 33.2% - 17s 0 0 2.67391 0 3286 4.00000 2.67391 33.2% - 19s 0 0 2.67391 0 3279 4.00000 2.67391 33.2% - 21s 0 0 2.67391 0 3376 4.00000 2.67391 33.2% - 23s 0 0 2.67391 0 3390 4.00000 2.67391 33.2% - 26s 0 0 2.67391 0 3391 4.00000 2.67391 33.2% - 29s 0 0 2.67391 0 3391 4.00000 2.67391 33.2% - 30s 0 1 3.00000 0 3391 4.00000 3.00000 25.0% - 39s 4 1 infeasible 3 4.00000 3.00000 25.0% 1616 40s Cutting planes: Clique: 130 Zero half: 13 Explored 6 nodes (75622 simplex iterations) in 40.74 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%