Gurobi 5.0.1 (linux64) logging started Fri Nov 16 09:34:51 2012 Optimize a model with 14849 rows, 4422 columns and 48640 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.46s Presolved: 14847 rows, 4420 columns, 48190 nonzeros Variable types: 0 continuous, 4420 integer (4420 binary) Found heuristic solution: objective 66.0000000 Root relaxation: objective 2.000000e+00, 3287 iterations, 0.12 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 132 66.00000 2.00000 97.0% - 0s H 0 0 65.0000000 2.00000 96.9% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 3528 5.00000 2.66667 46.7% - 7s 0 0 2.66667 0 794 5.00000 2.66667 46.7% - 9s 0 0 2.66667 0 1197 5.00000 2.66667 46.7% - 9s 0 0 2.66667 0 190 5.00000 2.66667 46.7% - 11s 0 0 2.67016 0 3680 5.00000 2.67016 46.6% - 13s 0 0 2.67016 0 3680 5.00000 2.67016 46.6% - 14s 0 0 2.67016 0 3709 5.00000 2.67016 46.6% - 15s 0 0 2.67016 0 3713 5.00000 2.67016 46.6% - 16s 0 0 2.67016 0 3714 5.00000 2.67016 46.6% - 17s 0 0 2.67016 0 3712 5.00000 2.67016 46.6% - 19s 0 0 2.67016 0 3735 5.00000 2.67016 46.6% - 20s 0 0 2.67016 0 3735 5.00000 2.67016 46.6% - 20s 0 2 2.80000 0 3735 5.00000 2.80000 44.0% - 29s 7 3 4.00000 2 142 5.00000 3.00000 40.0% 906 31s * 30 3 21 4.0000000 3.00000 25.0% 327 32s 33 0 cutoff 1 4.00000 4.00000 0.0% 568 35s Cutting planes: Clique: 120 Zero half: 5 Explored 34 nodes (69228 simplex iterations) in 35.13 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%