Gurobi 5.0.1 (linux64) logging started Fri Nov 16 17:09:06 2012 Optimize a model with 15498 rows, 6806 columns and 52972 nonzeros Presolve removed 2214 rows and 0 columns Presolve time: 0.38s Presolved: 13284 rows, 6806 columns, 47642 nonzeros Variable types: 0 continuous, 6806 integer (6806 binary) Found heuristic solution: objective 49.0000000 Root relaxation: objective 3.000000e+00, 13842 iterations, 3.60 seconds Total elapsed time = 7.30s Total elapsed time = 10.26s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 157 49.00000 3.00000 93.9% - 11s H 0 0 4.0000000 3.00000 25.0% - 11s 0 0 3.00000 0 451 4.00000 3.00000 25.0% - 14s 0 0 3.00000 0 159 4.00000 3.00000 25.0% - 22s 0 0 3.00000 0 106 4.00000 3.00000 25.0% - 24s 0 0 3.00000 0 91 4.00000 3.00000 25.0% - 28s 0 0 3.00000 0 84 4.00000 3.00000 25.0% - 30s 0 0 3.00000 0 110 4.00000 3.00000 25.0% - 32s 0 0 3.00000 0 86 4.00000 3.00000 25.0% - 33s 0 0 3.00000 0 112 4.00000 3.00000 25.0% - 38s 0 0 3.00000 0 128 4.00000 3.00000 25.0% - 40s 0 0 3.00000 0 128 4.00000 3.00000 25.0% - 49s 0 0 3.00000 0 128 4.00000 3.00000 25.0% - 55s 0 2 3.00000 0 128 4.00000 3.00000 25.0% - 69s 2 3 3.00000 1 128 4.00000 3.00000 25.0% 11006 71s 4 4 3.00000 1 82 4.00000 3.00000 25.0% 5503 79s 5 5 3.00000 1 72 4.00000 3.00000 25.0% 4403 82s 6 6 3.00000 1 153 4.00000 3.00000 25.0% 3669 86s 7 6 3.00000 1 136 4.00000 3.00000 25.0% 3145 91s 8 7 3.00000 1 111 4.00000 3.00000 25.0% 2752 95s 10 8 3.00000 1 113 4.00000 3.00000 25.0% 2201 101s 11 9 3.00000 1 115 4.00000 3.00000 25.0% 2001 106s 12 10 3.00000 1 126 4.00000 3.00000 25.0% 1834 111s 13 10 3.00000 1 127 4.00000 3.00000 25.0% 1693 118s 15 12 3.00000 1 127 4.00000 3.00000 25.0% 1468 120s 17 13 3.00000 16 150 4.00000 3.00000 25.0% 14743 127s 21 12 infeasible 18 4.00000 3.00000 25.0% 12241 130s 26 9 infeasible 21 4.00000 3.00000 25.0% 10420 135s Cutting planes: Zero half: 12 Explored 28 nodes (519666 simplex iterations) in 137.07 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%