Gurobi 5.6.3 (linux64) logging started Tue Oct 7 21:01:42 2014 Optimize a model with 7921 rows, 7833 columns and 31064 nonzeros Presolve time: 0.14s Presolved: 7921 rows, 7833 columns, 31064 nonzeros Variable types: 1 continuous, 7832 integer (7832 binary) Found heuristic solution: objective 0.9909665 Found heuristic solution: objective 0.9805048 Found heuristic solution: objective 0.9098506 Root relaxation: objective 1.357087e-01, 3102 iterations, 0.31 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.13571 0 857 0.90985 0.13571 85.1% - 0s H 0 0 0.6829658 0.13571 80.1% - 0s H 0 0 0.2509365 0.13571 45.9% - 0s 0 0 0.14567 0 623 0.25094 0.14567 41.9% - 1s 0 0 0.14567 0 635 0.25094 0.14567 41.9% - 1s 0 0 0.15001 0 662 0.25094 0.15001 40.2% - 1s 0 0 0.15156 0 664 0.25094 0.15156 39.6% - 1s 0 0 0.15160 0 701 0.25094 0.15160 39.6% - 1s 0 0 0.15160 0 673 0.25094 0.15160 39.6% - 1s H 0 0 0.2339577 0.15160 35.2% - 2s 0 2 0.15785 0 565 0.23396 0.15785 32.5% - 2s H 27 21 0.2276699 0.15786 30.7% 221 2s * 46 29 10 0.2127153 0.16123 24.2% 170 2s Cutting planes: Gomory: 5 MIR: 7 Explored 71 nodes (21394 simplex iterations) in 2.64 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.127152795480e-01, best bound 2.127152795480e-01, gap 0.0%