Build (method = -2) #dp: 25186 Step-3' Graph: 770 vertices and 8497 arcs (0.16s) Step-4' Graph: 769 vertices and 8495 arcs (0.17s) #V4/#V3 = 1.00 #A4/#A3 = 1.00 Ready! (0.17s) Optimize a model with 788 rows, 8496 columns and 23967 nonzeros Presolve removed 58 rows and 137 columns Presolve time: 0.20s Presolved: 730 rows, 8359 columns, 23745 nonzeros Variable types: 0 continuous, 8359 integer (703 binary) Found heuristic solution: objective 152.0000000 Found heuristic solution: objective 151.0000000 Optimize a model with 730 rows, 8359 columns and 23745 nonzeros Presolve removed 2 rows and 2 columns Presolved: 728 rows, 8357 columns, 23747 nonzeros Root barrier log... Ordering time: 0.01s Barrier statistics: AA' NZ : 1.521e+04 Factor NZ : 1.044e+05 (roughly 5 MBytes of memory) Factor Ops : 2.276e+07 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 8.59500456e+03 -2.36959525e+05 3.59e+05 1.78e-01 3.93e+02 0s 1 1.72050128e+03 -1.71547395e+05 4.16e+04 8.88e-16 5.29e+01 0s 2 6.86995477e+02 -6.77866904e+04 8.69e+03 2.22e-15 1.19e+01 0s 3 4.22978159e+02 -2.51647219e+04 2.26e+03 3.55e-15 3.24e+00 0s 4 2.98635853e+02 -1.29406268e+04 8.12e+02 1.24e-14 1.33e+00 0s 5 2.48677727e+02 -2.70859951e+03 5.58e+01 2.58e-14 2.08e-01 0s 6 2.01764475e+02 -1.99404551e+03 2.33e+01 1.78e-14 1.42e-01 0s 7 2.05633307e+02 -1.61792344e+03 1.98e+01 1.42e-14 1.17e-01 0s 8 1.98253531e+02 -1.00379549e+03 1.24e+01 8.88e-15 7.55e-02 0s 9 1.92683364e+02 -7.50599199e+02 4.42e+00 7.55e-15 5.74e-02 0s 10 1.83772000e+02 -3.64450430e+02 5.21e-01 3.55e-15 3.29e-02 0s 11 1.67077687e+02 -3.65889914e+02 3.94e-01 3.66e-15 3.19e-02 0s 12 1.65275107e+02 -2.71355971e+02 3.53e-01 2.44e-15 2.61e-02 0s 13 1.31418273e+02 -2.32524296e+02 2.58e-01 2.00e-15 2.18e-02 0s 14 9.26556205e+01 -1.76483303e+02 1.62e-01 1.74e-15 1.61e-02 0s 15 6.24139356e+01 -7.79510749e+01 9.34e-02 1.44e-15 8.40e-03 0s 16 5.79344683e+01 -7.10279574e+01 8.19e-02 1.46e-15 7.72e-03 0s 17 4.00201317e+01 -3.47141164e+01 4.41e-02 1.15e-15 4.47e-03 0s 18 3.55568861e+01 -1.84213457e+01 3.27e-02 1.16e-15 3.23e-03 0s 19 3.00124787e+01 4.40599308e+00 2.02e-02 1.13e-15 1.53e-03 0s 20 2.73670549e+01 1.20246019e+01 1.20e-02 1.22e-15 9.18e-04 0s 21 2.60745926e+01 1.52905172e+01 6.97e-03 1.17e-15 6.45e-04 0s 22 2.50369988e+01 1.91437620e+01 3.21e-03 1.20e-15 3.52e-04 0s 23 2.48537472e+01 2.21206104e+01 1.97e-03 9.90e-16 1.63e-04 0s 24 2.46075686e+01 2.33249293e+01 9.25e-04 1.05e-15 7.67e-05 0s 25 2.45214844e+01 2.36293918e+01 5.83e-04 1.47e-15 5.33e-05 0s 26 2.44569264e+01 2.38667375e+01 3.64e-04 1.42e-15 3.53e-05 0s 27 2.43935310e+01 2.40744303e+01 1.56e-04 1.22e-15 1.91e-05 0s 28 2.43625500e+01 2.41715659e+01 6.07e-05 1.38e-15 1.14e-05 1s 29 2.43506987e+01 2.42611143e+01 2.94e-05 1.27e-15 5.35e-06 1s 30 2.43474348e+01 2.42876207e+01 2.15e-05 1.37e-15 3.58e-06 1s 31 2.43420016e+01 2.43162147e+01 8.66e-06 1.27e-15 1.54e-06 1s 32 2.43387497e+01 2.43273557e+01 1.38e-06 1.03e-15 6.81e-07 1s 33 2.43382368e+01 2.43370729e+01 4.06e-07 8.35e-16 6.96e-08 1s 34 2.43380027e+01 2.43379713e+01 8.30e-10 9.65e-16 1.88e-09 1s 35 2.43380000e+01 2.43380000e+01 7.01e-13 8.71e-16 1.88e-12 1s Barrier solved model in 35 iterations and 0.64 seconds Optimal objective 2.43380000e+01 Root relaxation: objective 2.433800e+01, 5332 iterations, 0.75 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 24.33800 0 62 151.00000 24.33800 83.9% - 2s H 0 0 25.0000000 24.33800 2.65% - 2s Explored 0 nodes (14253 simplex iterations) in 2.91 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.500000000000e+01, best bound 2.500000000000e+01, gap 0.0% Preprocessing time: 0.20 seconds Gurobi run time: 2.91 seconds Total run time: 3.11 seconds Objective: 25 Solution: 1 x [1, 6, 9, 15, 15, 17] 1 x [2, 2, 2, 3, 9, 9, 14] 4 x [9, 9, 9, 12, 16, 17] 1 x [3, 8, 12, 14, 16, 17] 1 x [2, 8, 8, 14, 17, 18, 19] 1 x [2, 8, 8, 10, 14, 17, 17] 1 x [2, 4, 8, 8, 11, 13, 13, 18, 19] 4 x [2, 4, 8, 8, 11, 13, 13, 13, 18, 19] 1 x [2, 2, 2, 5, 5, 11, 16] 1 x [2, 2, 4, 6, 14, 16, 17] 1 x [1, 1, 1, 2, 14, 14, 16, 17, 17] 4 x [1, 2, 2, 2, 4, 6, 7, 16] 3 x [1, 1, 3, 3, 3, 7, 12, 16, 16, 17, 19] 1 x [2, 5, 6, 18, 18, 18]