Gurobi 5.0.1 (linux64) logging started Fri Nov 16 20:31:57 2012 Optimize a model with 13736 rows, 18632 columns and 59296 nonzeros Presolve removed 31 rows and 4216 columns Presolve time: 0.26s Presolved: 13705 rows, 14416 columns, 55080 nonzeros Variable types: 0 continuous, 14416 integer (14416 binary) Found heuristic solution: objective 42.0000000 Root relaxation: objective 2.000000e+00, 16732 iterations, 2.42 seconds Total elapsed time = 5.16s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 150 42.00000 2.00000 95.2% - 6s H 0 0 3.0000000 2.00000 33.3% - 6s 0 0 2.00000 0 257 3.00000 2.00000 33.3% - 11s 0 0 2.00000 0 366 3.00000 2.00000 33.3% - 22s 0 0 2.00000 0 381 3.00000 2.00000 33.3% - 34s 0 0 2.00000 0 376 3.00000 2.00000 33.3% - 43s 0 0 2.00000 0 293 3.00000 2.00000 33.3% - 56s 0 0 2.00000 0 288 3.00000 2.00000 33.3% - 64s 0 0 2.00000 0 150 3.00000 2.00000 33.3% - 72s 0 0 2.00000 0 259 3.00000 2.00000 33.3% - 80s 0 0 2.00000 0 288 3.00000 2.00000 33.3% - 93s 0 0 2.00000 0 288 3.00000 2.00000 33.3% - 99s 0 2 2.00000 0 288 3.00000 2.00000 33.3% - 114s 2 3 2.00000 1 288 3.00000 2.00000 33.3% 10104 117s 4 4 2.00000 1 150 3.00000 2.00000 33.3% 5052 124s 5 5 2.00000 1 259 3.00000 2.00000 33.3% 4042 141s 6 6 2.00000 1 150 3.00000 2.00000 33.3% 3368 154s 7 6 2.00000 1 150 3.00000 2.00000 33.3% 2887 169s 8 7 2.00000 1 150 3.00000 2.00000 33.3% 2526 189s Cutting planes: Gomory: 12 Zero half: 2 Explored 8 nodes (495368 simplex iterations) in 189.19 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%