Gurobi 5.6.3 (linux64) logging started Wed Oct 8 05:15:43 2014 Optimize a model with 53824 rows, 53593 columns and 213675 nonzeros Presolve time: 1.51s Presolved: 53824 rows, 53593 columns, 213675 nonzeros Variable types: 1 continuous, 53592 integer (53592 binary) Found heuristic solution: objective 1.2664616 Found heuristic solution: objective 1.1988892 Found heuristic solution: objective 1.1227381 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 9833 7.9399340e-02 1.693853e+04 0.000000e+00 5s 10558 7.9443627e-02 0.000000e+00 0.000000e+00 6s Root relaxation: objective 7.944363e-02, 10558 iterations, 6.27 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.07944 0 2149 1.12274 0.07944 92.9% - 8s H 0 0 0.1289004 0.07944 38.4% - 15s 0 0 0.09250 0 1149 0.12890 0.09250 28.2% - 23s H 0 0 0.1262153 0.09250 26.7% - 24s 0 0 0.10601 0 844 0.12622 0.10601 16.0% - 25s 0 0 0.11775 0 815 0.12622 0.11775 6.71% - 25s 0 0 0.11901 0 699 0.12622 0.11901 5.71% - 25s 0 0 0.11901 0 713 0.12622 0.11901 5.71% - 25s 0 0 0.11901 0 472 0.12622 0.11901 5.71% - 26s 0 0 0.11901 0 548 0.12622 0.11901 5.71% - 26s * 0 0 0 0.1256749 0.12567 0.00% - 26s Cutting planes: Gomory: 2 Implied bound: 1 MIR: 7 Zero half: 4 Explored 0 nodes (43449 simplex iterations) in 26.93 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.256748508896e-01, best bound 1.256748508896e-01, gap 0.0%