Gurobi 5.6.3 (linux64) logging started Tue Oct 7 20:29:22 2014 Optimize a model with 1849 rows, 1807 columns and 7098 nonzeros Presolve time: 0.03s Presolved: 1849 rows, 1807 columns, 7098 nonzeros Variable types: 1 continuous, 1806 integer (1806 binary) Found heuristic solution: objective 1.1157702 Found heuristic solution: objective 0.9044614 Found heuristic solution: objective 0.8470122 Root relaxation: objective 1.741577e-01, 942 iterations, 0.04 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.17416 0 350 0.84701 0.17416 79.4% - 0s H 0 0 0.4196090 0.17416 58.5% - 0s 0 0 0.18379 0 286 0.41961 0.18379 56.2% - 0s 0 0 0.18379 0 347 0.41961 0.18379 56.2% - 0s H 0 0 0.3567943 0.18379 48.5% - 0s 0 0 0.18497 0 265 0.35679 0.18497 48.2% - 0s H 0 0 0.3306698 0.18497 44.1% - 0s 0 2 0.18869 0 265 0.33067 0.18869 42.9% - 0s H 1 2 0.2825886 0.18869 33.2% 323 0s H 3 3 0.2712006 0.26715 1.50% 108 0s H 3 3 0.2685432 0.26715 0.52% 108 0s H 3 3 0.2671460 0.26715 0.00% 108 0s Explored 3 nodes (5449 simplex iterations) in 0.83 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.671460025718e-01, best bound 2.671460025718e-01, gap 0.0%