Gurobi 5.6.3 (linux64) logging started Tue Oct 7 20:38:25 2014 Optimize a model with 4225 rows, 4161 columns and 16448 nonzeros Presolve time: 0.13s Presolved: 4225 rows, 4161 columns, 16448 nonzeros Variable types: 1 continuous, 4160 integer (4160 binary) Found heuristic solution: objective 0.9401590 Found heuristic solution: objective 0.8365209 Found heuristic solution: objective 0.6868148 Root relaxation: objective 1.534808e-01, 1948 iterations, 0.10 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.15348 0 556 0.68681 0.15348 77.7% - 0s H 0 0 0.6859097 0.15348 77.6% - 0s H 0 0 0.5495261 0.15348 72.1% - 0s H 0 0 0.3398010 0.15348 54.8% - 0s 0 0 0.15629 0 520 0.33980 0.15629 54.0% - 0s 0 0 0.15629 0 559 0.33980 0.15629 54.0% - 0s H 0 0 0.3143544 0.15629 50.3% - 0s H 0 0 0.3120012 0.15629 49.9% - 0s 0 0 0.15635 0 551 0.31200 0.15635 49.9% - 0s 0 0 0.15762 0 543 0.31200 0.15762 49.5% - 0s 0 0 0.15838 0 574 0.31200 0.15838 49.2% - 0s 0 0 0.15851 0 540 0.31200 0.15851 49.2% - 0s 0 0 0.15851 0 519 0.31200 0.15851 49.2% - 1s 0 2 0.15879 0 519 0.31200 0.15879 49.1% - 1s H 27 27 0.3077317 0.16743 45.6% 133 1s H 54 54 0.2685958 0.16743 37.7% 97.3 1s H 92 13 0.2603853 0.19216 26.2% 95.3 1s * 100 21 8 0.2601052 0.19237 26.0% 90.9 1s * 101 16 8 0.2478984 0.19237 22.4% 90.0 1s Cutting planes: Gomory: 5 Implied bound: 1 MIR: 1 Zero half: 1 Explored 102 nodes (16155 simplex iterations) in 1.65 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.478984314139e-01, best bound 2.478984314139e-01, gap 0.0%