Build (method = -2) #dp: 21154 Step-3' Graph: 734 vertices and 7176 arcs (0.13s) Step-4' Graph: 719 vertices and 7146 arcs (0.13s) #V4/#V3 = 0.98 #A4/#A3 = 1.00 Ready! (0.13s) Optimize a model with 738 rows, 7147 columns and 20017 nonzeros Presolve removed 22 rows and 45 columns Presolve time: 0.08s Presolved: 716 rows, 7102 columns, 19959 nonzeros Variable types: 0 continuous, 7102 integer (0 binary) Found heuristic solution: objective 166.0000000 Found heuristic solution: objective 107.0000000 Optimize a model with 716 rows, 7102 columns and 19959 nonzeros Presolved: 716 rows, 7102 columns, 19959 nonzeros Root barrier log... Ordering time: 0.01s Barrier statistics: AA' NZ : 1.284e+04 Factor NZ : 9.037e+04 (roughly 4 MBytes of memory) Factor Ops : 1.787e+07 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 4.66264815e+03 -2.75917276e+05 1.89e+05 2.22e-16 2.81e+02 0s 1 1.10917967e+03 -1.96917543e+05 3.17e+04 1.33e-15 5.58e+01 0s 2 5.58385072e+02 -7.58052576e+04 9.30e+03 2.09e-14 1.59e+01 0s 3 3.12741017e+02 -2.63625286e+04 2.55e+03 2.31e-14 4.36e+00 0s 4 2.63702067e+02 -7.13877959e+03 3.52e+02 1.51e-14 8.25e-01 0s 5 1.90449816e+02 -2.00876374e+03 1.28e+01 1.87e-14 1.62e-01 0s 6 2.00662387e+02 -3.05749458e+02 3.10e-02 1.61e-15 3.56e-02 0s 7 1.63877011e+02 -2.56278462e+02 8.77e-04 1.47e-15 2.95e-02 0s 8 1.36209849e+02 -2.09579623e+02 6.71e-04 1.44e-15 2.43e-02 0s 9 1.19547376e+02 -1.40002932e+02 5.74e-04 9.84e-16 1.82e-02 0s 10 1.14003936e+02 -1.20983493e+02 5.44e-04 8.02e-16 1.65e-02 0s 11 8.55732326e+01 -6.01143211e+01 3.96e-04 4.20e-16 1.02e-02 0s 12 4.79971704e+01 -3.24193463e+01 1.83e-04 3.84e-16 5.65e-03 0s 13 3.54791655e+01 -7.12353333e+00 1.07e-04 3.53e-16 3.00e-03 0s 14 2.91007268e+01 4.26406442e+00 6.29e-05 3.33e-16 1.75e-03 0s 15 2.83032454e+01 7.98517876e+00 5.17e-05 4.06e-16 1.43e-03 0s 16 2.50271556e+01 1.43180644e+01 2.66e-05 3.29e-16 7.53e-04 0s 17 2.35882612e+01 1.98051281e+01 1.45e-05 3.77e-16 2.66e-04 0s 18 2.31061760e+01 2.07211401e+01 9.59e-06 3.87e-16 1.68e-04 0s 19 2.27976097e+01 2.11633628e+01 6.62e-06 3.56e-16 1.15e-04 0s 20 2.27248696e+01 2.14293931e+01 3.16e-06 4.32e-16 9.11e-05 0s 21 2.24810500e+01 2.18440619e+01 1.81e-06 4.44e-16 4.48e-05 0s 22 2.23062702e+01 2.19863998e+01 6.59e-07 3.33e-16 2.25e-05 0s 23 2.22648666e+01 2.21133590e+01 3.44e-07 2.90e-16 1.07e-05 0s 24 2.22617771e+01 2.21331889e+01 3.19e-07 3.79e-16 9.04e-06 0s 25 2.22428272e+01 2.21781606e+01 1.75e-07 3.04e-16 4.55e-06 0s 26 2.22212475e+01 2.22120780e+01 4.44e-09 3.09e-16 6.45e-07 0s 27 2.22210480e+01 2.22123714e+01 3.78e-09 3.75e-16 6.10e-07 0s 28 2.22201033e+01 2.22183201e+01 1.01e-10 2.65e-16 1.25e-07 0s 29 2.22200009e+01 2.22199873e+01 2.11e-13 3.50e-16 9.54e-10 0s 30 2.22200000e+01 2.22200000e+01 6.84e-13 3.33e-16 9.54e-13 0s Barrier solved model in 30 iterations and 0.44 seconds Optimal objective 2.22200000e+01 Root relaxation: objective 2.222000e+01, 4217 iterations, 0.53 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 22.22000 0 70 107.00000 22.22000 79.2% - 2s H 0 0 24.0000000 22.22000 7.42% - 2s H 0 0 23.0000000 22.22000 3.39% - 2s Explored 0 nodes (12061 simplex iterations) in 2.28 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.300000000000e+01, best bound 2.300000000000e+01, gap 0.0% Preprocessing time: 0.17 seconds Gurobi run time: 2.28 seconds Total run time: 2.45 seconds Objective: 23 Solution: 2 x [6, 15, 16, 17, 17, 18, 18] 1 x [2, 6, 10, 11, 12, 15, 15, 15, 19, 19] 1 x [2, 4, 5, 7, 10, 12, 12, 14, 19] 1 x [2, 3, 4, 7, 13, 16, 17, 17] 1 x [2, 2, 4, 5, 9, 12, 12, 16, 17, 18] 1 x [2, 2, 4, 5, 9, 12, 16, 16, 17] 1 x [2, 4, 5, 5, 7, 9, 12, 17] 2 x [1, 8, 14, 16, 17, 18, 18] 5 x [3, 8, 9, 9, 9, 13, 13, 17] 2 x [3, 7, 8, 9, 9, 16, 16, 17, 17] 1 x [1, 7, 9, 11, 11, 14, 15, 16, 18] 4 x [1, 3, 5, 11, 11, 11, 11, 12, 14, 16, 17] 1 x [1, 3, 5, 11, 11, 14, 16]