Gurobi 5.0.1 (linux64) logging started Fri Nov 16 19:51:44 2012 Optimize a model with 12936 rows, 17556 columns and 55836 nonzeros Presolve removed 30 rows and 3960 columns Presolve time: 0.23s Presolved: 12906 rows, 13596 columns, 51876 nonzeros Variable types: 0 continuous, 13596 integer (13596 binary) Found heuristic solution: objective 47.0000000 Root relaxation: objective 2.000000e+00, 12348 iterations, 0.82 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 110 47.00000 2.00000 95.7% - 3s H 0 0 5.0000000 2.00000 60.0% - 3s H 0 0 4.0000000 2.00000 50.0% - 3s 0 0 2.00000 0 241 4.00000 2.00000 50.0% - 7s H 0 0 3.0000000 2.00000 33.3% - 7s 0 0 2.00000 0 203 3.00000 2.00000 33.3% - 16s 0 0 2.00000 0 247 3.00000 2.00000 33.3% - 25s 0 0 2.00000 0 213 3.00000 2.00000 33.3% - 32s 0 0 2.00000 0 262 3.00000 2.00000 33.3% - 41s 0 0 2.00000 0 213 3.00000 2.00000 33.3% - 51s 0 0 2.00000 0 215 3.00000 2.00000 33.3% - 62s 0 0 2.00000 0 262 3.00000 2.00000 33.3% - 73s 0 0 2.00000 0 262 3.00000 2.00000 33.3% - 78s 0 2 2.00000 0 262 3.00000 2.00000 33.3% - 87s 4 4 2.00000 1 110 3.00000 2.00000 33.3% 4493 91s 5 5 2.00000 1 225 3.00000 2.00000 33.3% 3595 100s 6 6 2.00000 1 110 3.00000 2.00000 33.3% 2996 109s 7 6 2.00000 1 110 3.00000 2.00000 33.3% 2568 125s 8 7 2.00000 1 142 3.00000 2.00000 33.3% 2247 140s 11 9 infeasible 16 3.00000 2.00000 33.3% 18982 151s Cutting planes: Gomory: 11 Explored 13 nodes (464357 simplex iterations) in 152.68 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%