Gurobi 5.0.1 (linux64) logging started Fri Nov 16 14:34:56 2012 Optimize a model with 21224 rows, 5700 columns and 68998 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.73s Presolved: 21297 rows, 5698 columns, 74057 nonzeros Variable types: 0 continuous, 5698 integer (5698 binary) Found heuristic solution: objective 74.0000000 Root relaxation: objective 2.000000e+00, 4066 iterations, 0.17 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 150 74.00000 2.00000 97.3% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 2.66667 0 360 5.00000 2.66667 46.7% - 16s 0 0 2.67593 0 5348 5.00000 2.67593 46.5% - 17s 0 0 2.67593 0 5331 5.00000 2.67593 46.5% - 20s 0 0 2.67593 0 5331 5.00000 2.67593 46.5% - 21s 0 0 2.67593 0 5031 5.00000 2.67593 46.5% - 23s 0 0 2.67593 0 5029 5.00000 2.67593 46.5% - 25s 0 0 2.67593 0 5026 5.00000 2.67593 46.5% - 27s 0 0 2.67593 0 5033 5.00000 2.67593 46.5% - 28s 0 0 2.67593 0 5033 5.00000 2.67593 46.5% - 30s 0 0 2.67593 0 5028 5.00000 2.67593 46.5% - 31s 0 0 2.67593 0 5027 5.00000 2.67593 46.5% - 33s 0 0 2.67593 0 5030 5.00000 2.67593 46.5% - 34s 0 0 2.67593 0 5030 5.00000 2.67593 46.5% - 35s 0 2 3.00000 0 5030 5.00000 3.00000 40.0% - 79s 3 5 4.00000 3 181 5.00000 3.00000 40.0% 1471 80s * 26 3 21 4.0000000 3.00000 25.0% 339 81s Cutting planes: Clique: 308 Zero half: 8 Explored 32 nodes (68656 simplex iterations) in 81.20 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%