Gurobi 5.0.1 (linux64) logging started Fri Nov 16 15:57:16 2012 Optimize a model with 12284 rows, 5550 columns and 42106 nonzeros Presolve removed 1408 rows and 148 columns Presolve time: 0.24s Presolved: 10876 rows, 5402 columns, 38554 nonzeros Variable types: 0 continuous, 5402 integer (5402 binary) Found heuristic solution: objective 44.0000000 Root relaxation: objective 3.000000e+00, 9456 iterations, 1.77 seconds Total elapsed time = 5.17s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 123 44.00000 3.00000 93.2% - 6s H 0 0 6.0000000 3.00000 50.0% - 6s H 0 0 5.0000000 3.00000 40.0% - 6s 0 0 3.00000 0 136 5.00000 3.00000 40.0% - 7s H 0 0 4.0000000 3.00000 25.0% - 7s 0 0 3.00000 0 145 4.00000 3.00000 25.0% - 12s 0 0 3.00000 0 138 4.00000 3.00000 25.0% - 16s 0 0 3.00000 0 96 4.00000 3.00000 25.0% - 18s 0 0 3.00000 0 136 4.00000 3.00000 25.0% - 22s 0 0 3.00000 0 134 4.00000 3.00000 25.0% - 25s 0 0 3.00000 0 160 4.00000 3.00000 25.0% - 29s 0 0 3.00000 0 194 4.00000 3.00000 25.0% - 34s 0 0 3.00000 0 194 4.00000 3.00000 25.0% - 36s 0 2 3.00000 0 194 4.00000 3.00000 25.0% - 42s 4 4 3.00000 1 93 4.00000 3.00000 25.0% 2110 49s 5 5 3.00000 1 110 4.00000 3.00000 25.0% 1688 50s 7 6 3.00000 1 139 4.00000 3.00000 25.0% 1206 61s 11 9 3.00000 12 161 4.00000 3.00000 25.0% 8681 71s 13 8 3.00000 13 116 4.00000 3.00000 25.0% 7405 75s 15 10 3.00000 14 124 4.00000 3.00000 25.0% 6612 82s 19 8 infeasible 16 4.00000 3.00000 25.0% 5596 85s 36 3 3.00000 16 90 4.00000 3.00000 25.0% 3301 90s Cutting planes: Gomory: 2 Zero half: 19 Explored 42 nodes (313510 simplex iterations) in 90.18 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%