Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:30:09 2012 Optimize a model with 10674 rows, 3782 columns and 35500 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.27s Presolved: 10733 rows, 3780 columns, 38871 nonzeros Variable types: 0 continuous, 3780 integer (3780 binary) Found heuristic solution: objective 61.0000000 Root relaxation: objective 2.000000e+00, 2759 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 0 122 61.00000 2.00000 96.7% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 279 5.00000 2.66667 46.7% - 1s 0 0 2.67816 0 3250 5.00000 2.67816 46.4% - 2s H 0 0 4.0000000 2.67816 33.0% - 2s 0 0 2.67816 0 3274 4.00000 2.67816 33.0% - 3s 0 0 2.67816 0 2991 4.00000 2.67816 33.0% - 10s 0 0 2.67816 0 3064 4.00000 2.67816 33.0% - 15s 0 0 2.67816 0 2910 4.00000 2.67816 33.0% - 21s 0 0 2.67816 0 3049 4.00000 2.67816 33.0% - 26s 0 0 2.67816 0 3087 4.00000 2.67816 33.0% - 32s 0 0 3.00000 0 116 4.00000 3.00000 25.0% - 35s 0 0 3.00000 0 161 4.00000 3.00000 25.0% - 35s 0 0 3.00000 0 110 4.00000 3.00000 25.0% - 35s 0 0 3.00000 0 108 4.00000 3.00000 25.0% - 35s 0 0 3.00000 0 110 4.00000 3.00000 25.0% - 35s 0 0 3.00000 0 110 4.00000 3.00000 25.0% - 35s 0 2 3.00000 0 110 4.00000 3.00000 25.0% - 35s Cutting planes: Gomory: 4 Clique: 1 Zero half: 18 Explored 20 nodes (114922 simplex iterations) in 35.97 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%