Build (method = -2) #dp: 12259 Step-3' Graph: 2156 vertices and 6461 arcs (0.10s) Step-4' Graph: 999 vertices and 4147 arcs (0.11s) #V4/#V3 = 0.46 #A4/#A3 = 0.64 Ready! (0.11s) Optimize a model with 1038 rows, 4148 columns and 10450 nonzeros Presolve removed 164 rows and 277 columns Presolve time: 0.06s Presolved: 874 rows, 3871 columns, 10460 nonzeros Variable types: 0 continuous, 3871 integer (0 binary) Found heuristic solution: objective 2629.0000000 Found heuristic solution: objective 2440.0000000 Optimize a model with 874 rows, 3871 columns and 10460 nonzeros Presolve removed 6 rows and 6 columns Presolved: 868 rows, 3865 columns, 10496 nonzeros Root barrier log... Ordering time: 0.01s Barrier statistics: AA' NZ : 6.818e+03 Factor NZ : 4.122e+04 (roughly 2 MBytes of memory) Factor Ops : 3.983e+06 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 8.65906836e+04 -1.12840943e+06 3.31e+06 2.22e-16 2.67e+03 0s 1 1.79816088e+04 -6.73271778e+05 3.78e+05 8.88e-16 3.59e+02 0s 2 8.13159684e+03 -2.84622787e+05 1.05e+05 8.44e-15 1.03e+02 0s 3 3.71377699e+03 -1.08529523e+05 1.44e+04 4.44e-15 2.21e+01 0s 4 2.89822423e+03 -3.63004412e+04 2.44e+03 4.66e-15 6.18e+00 0s 5 2.59756448e+03 -1.57965417e+04 4.28e+02 1.78e-15 2.52e+00 0s 6 2.37067706e+03 -1.05524132e+04 1.11e+02 1.37e-15 1.70e+00 0s 7 1.92985579e+03 -6.46016727e+03 2.32e+01 1.42e-15 1.09e+00 0s 8 1.60677827e+03 -2.49211608e+03 9.69e+00 1.31e-15 5.30e-01 0s 9 1.47441358e+03 -6.44057044e+02 6.19e+00 1.15e-15 2.74e-01 0s 10 1.37778941e+03 -1.27898114e+02 4.19e+00 1.34e-15 1.94e-01 0s 11 1.32939914e+03 3.22001766e+02 2.95e+00 1.46e-15 1.30e-01 0s 12 1.31915631e+03 4.96115672e+02 2.51e+00 1.69e-15 1.06e-01 0s 13 1.25171140e+03 9.39375440e+02 1.09e+00 1.19e-15 4.03e-02 0s 14 1.21929806e+03 1.02017143e+03 4.10e-01 1.53e-15 2.57e-02 0s 15 1.20780334e+03 1.08967515e+03 2.49e-01 1.65e-15 1.52e-02 0s 16 1.19864875e+03 1.11152984e+03 1.45e-01 1.60e-15 1.12e-02 0s 17 1.19631576e+03 1.13318816e+03 1.16e-01 1.54e-15 8.14e-03 0s 18 1.19362331e+03 1.15283590e+03 7.49e-02 1.54e-15 5.26e-03 0s 19 1.19021479e+03 1.16362063e+03 3.72e-02 1.61e-15 3.43e-03 0s 20 1.18879061e+03 1.17290838e+03 2.56e-02 1.26e-15 2.05e-03 0s 21 1.18786794e+03 1.17620815e+03 1.76e-02 1.59e-15 1.50e-03 0s 22 1.18696100e+03 1.17980144e+03 9.73e-03 1.59e-15 9.23e-04 0s 23 1.18589372e+03 1.18089291e+03 1.58e-03 1.60e-15 6.44e-04 0s 24 1.18567196e+03 1.18180457e+03 9.76e-04 1.50e-15 4.98e-04 0s 25 1.18547927e+03 1.18299231e+03 4.68e-04 1.44e-15 3.21e-04 0s 26 1.18527810e+03 1.18429510e+03 1.45e-04 1.27e-15 1.27e-04 0s 27 1.18519488e+03 1.18494273e+03 5.37e-05 9.64e-16 3.25e-05 0s 28 1.18516982e+03 1.18503793e+03 3.14e-05 1.11e-15 1.70e-05 0s 29 1.18514490e+03 1.18508589e+03 8.75e-06 1.19e-15 7.60e-06 0s 30 1.18513522e+03 1.18513161e+03 7.44e-07 1.21e-15 4.65e-07 0s 31 1.18513401e+03 1.18513396e+03 1.34e-10 1.19e-15 6.79e-09 0s 32 1.18513401e+03 1.18513401e+03 3.47e-10 1.24e-15 6.79e-12 0s Barrier solved model in 32 iterations and 0.21 seconds Optimal objective 1.18513401e+03 Root relaxation: objective 1.185134e+03, 735 iterations, 0.21 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 1185.13401 0 71 2440.00000 1185.13401 51.4% - 0s H 0 0 1186.0000000 1185.13401 0.07% - 0s Explored 0 nodes (839 simplex iterations) in 0.39 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.186000000000e+03, best bound 1.186000000000e+03, gap 0.0% Preprocessing time: 0.14 seconds Gurobi run time: 0.39 seconds Total run time: 0.53 seconds Objective: 1186 Solution: 55 x [1, 24, 39] 67 x [1, 31, 36] 32 x [2, 19] 21 x [2, 25, 37] 24 x [3, 23, 38] 3 x [3, 24, 36] 57 x [3, 27, 34] 59 x [3, 29, 35, 39] 33 x [3, 31, 32] 17 x [4, 18, 39] 94 x [5, 25, 33] 70 x [6, 28, 30] 3 x [7, 17, 34] 25 x [7, 19, 30] 26 x [7, 24, 28, 38] 1 x [8, 21] 23 x [8, 21, 22] 47 x [9, 12, 37] 4 x [9, 15, 33] 30 x [9, 20, 25, 38] 55 x [9, 21, 28, 36] 12 x [10, 15, 33] 35 x [10, 20, 22, 39] 44 x [11, 17, 31, 38] 34 x [11, 18, 26, 38] 22 x [11, 23, 26, 33] 5 x [12, 13, 32] 18 x [12, 15, 29] 15 x [12, 20, 21, 38] 6 x [13, 15, 26] 39 x [13, 18, 31, 33] 91 x [14, 17, 22] 3 x [14, 21, 28] 19 x [14, 21, 28, 31] 4 x [15, 20, 28, 29] 29 x [15, 21, 27, 29] 1 x [15, 21, 28, 33, 38] 1 x [15, 21, 29] 6 x [15, 23, 25, 28] 48 x [16, 20, 24, 28] 8 x [17, 18, 23, 33]