Gurobi 5.6.3 (linux64) logging started Tue Oct 7 23:22:26 2014 Optimize a model with 19600 rows, 19461 columns and 77423 nonzeros Presolve time: 0.40s Presolved: 19600 rows, 19461 columns, 77423 nonzeros Variable types: 1 continuous, 19460 integer (19460 binary) Found heuristic solution: objective 0.9215082 Found heuristic solution: objective 0.9085613 Found heuristic solution: objective 0.8369891 Root relaxation: objective 1.094861e-01, 6627 iterations, 1.47 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.10949 0 1324 0.83699 0.10949 86.9% - 2s H 0 0 0.3190766 0.10949 65.7% - 2s 0 0 0.11226 0 1368 0.31908 0.11226 64.8% - 3s 0 0 0.11226 0 1317 0.31908 0.11226 64.8% - 4s H 0 0 0.3070133 0.11226 63.4% - 4s H 0 0 0.2937991 0.11226 61.8% - 4s 0 0 0.11226 0 1394 0.29380 0.11226 61.8% - 5s 0 0 0.11446 0 1457 0.29380 0.11446 61.0% - 5s H 0 0 0.2395678 0.11446 52.2% - 5s 0 0 0.11519 0 1340 0.23957 0.11519 51.9% - 6s 0 2 0.11520 0 1340 0.23957 0.11520 51.9% - 29s H 1 2 0.1869590 0.11520 38.4% 994 31s H 4 3 0.1840631 0.15829 14.0% 248 32s H 5 4 0.1828019 0.16887 7.62% 199 32s H 6 5 0.1805412 0.16961 6.06% 166 32s H 7 4 0.1793917 0.17939 0.00% 142 33s Cutting planes: MIR: 1 Zero half: 4 Explored 7 nodes (31674 simplex iterations) in 33.03 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.793917412688e-01, best bound 1.793917412688e-01, gap 0.0%