Gurobi 5.0.1 (linux64) logging started Fri Nov 16 06:30:33 2012 Optimize a model with 10091 rows, 3422 columns and 33406 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.23s Presolved: 10147 rows, 3420 columns, 36422 nonzeros Variable types: 0 continuous, 3420 integer (3420 binary) Found heuristic solution: objective 58.0000000 Root relaxation: objective 2.000000e+00, 2522 iterations, 0.07 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 116 58.00000 2.00000 96.6% - 0s H 0 0 50.0000000 2.00000 96.0% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 3048 5.00000 2.66667 46.7% - 1s 0 0 2.66667 0 972 5.00000 2.66667 46.7% - 2s 0 0 2.66667 0 3125 5.00000 2.66667 46.7% - 2s 0 0 2.66667 0 148 5.00000 2.66667 46.7% - 5s H 0 0 4.0000000 2.66667 33.3% - 6s 0 0 2.67066 0 2753 4.00000 2.67066 33.2% - 8s 0 0 2.67066 0 2787 4.00000 2.67066 33.2% - 8s 0 0 2.67066 0 2823 4.00000 2.67066 33.2% - 10s 0 0 2.67066 0 2816 4.00000 2.67066 33.2% - 12s 0 0 2.67066 0 2755 4.00000 2.67066 33.2% - 14s 0 0 2.67066 0 2831 4.00000 2.67066 33.2% - 15s 0 0 2.67066 0 2860 4.00000 2.67066 33.2% - 17s 0 0 2.67066 0 2770 4.00000 2.67066 33.2% - 20s 0 0 2.67066 0 2791 4.00000 2.67066 33.2% - 22s 0 0 2.67066 0 2766 4.00000 2.67066 33.2% - 23s 0 2 2.80000 0 2766 4.00000 2.80000 30.0% - 32s Cutting planes: Clique: 64 Zero half: 4 Explored 11 nodes (79878 simplex iterations) in 34.93 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%