Gurobi 5.0.1 (linux64) logging started Fri Nov 16 12:08:17 2012 Optimize a model with 15974 rows, 5112 columns and 52680 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.54s Presolved: 16043 rows, 5110 columns, 57271 nonzeros Variable types: 0 continuous, 5110 integer (5110 binary) Found heuristic solution: objective 71.0000000 Root relaxation: objective 2.000000e+00, 3746 iterations, 0.15 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 142 71.00000 2.00000 97.2% - 0s H 0 0 70.0000000 2.00000 97.1% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 2.66667 0 633 5.00000 2.66667 46.7% - 4s H 0 0 4.0000000 2.66667 33.3% - 5s 0 0 2.66667 0 3091 4.00000 2.66667 33.3% - 5s 0 0 2.66667 0 168 4.00000 2.66667 33.3% - 10s 0 0 2.66990 0 4104 4.00000 2.66990 33.3% - 13s 0 0 2.66990 0 4130 4.00000 2.66990 33.3% - 15s 0 0 2.66990 0 3706 4.00000 2.66990 33.3% - 17s 0 0 2.66990 0 3658 4.00000 2.66990 33.3% - 19s 0 0 2.66990 0 3776 4.00000 2.66990 33.3% - 21s 0 0 2.66990 0 3810 4.00000 2.66990 33.3% - 23s 0 0 2.66990 0 3799 4.00000 2.66990 33.3% - 25s 0 0 2.66990 0 3799 4.00000 2.66990 33.3% - 27s 0 0 2.66990 0 3799 4.00000 2.66990 33.3% - 30s 0 0 2.66990 0 3799 4.00000 2.66990 33.3% - 31s 0 2 2.80000 0 3799 4.00000 2.80000 30.0% - 45s Cutting planes: Clique: 95 Zero half: 10 Explored 9 nodes (96041 simplex iterations) in 47.26 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%