Build (method = -2) #dp: 5448 Step-3' Graph: 1047 vertices and 3134 arcs (0.04s) Step-4' Graph: 471 vertices and 1982 arcs (0.05s) #V4/#V3 = 0.45 #A4/#A3 = 0.63 Ready! (0.05s) Optimize a model with 509 rows, 1983 columns and 5011 nonzeros Presolve removed 74 rows and 128 columns Presolve time: 0.03s Presolved: 435 rows, 1855 columns, 4963 nonzeros Variable types: 0 continuous, 1855 integer (0 binary) Found heuristic solution: objective 2463.0000000 Optimize a model with 435 rows, 1855 columns and 4963 nonzeros Presolved: 435 rows, 1855 columns, 4963 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 3.419e+03 Factor NZ : 1.563e+04 (roughly 1 MByte of memory) Factor Ops : 8.967e+05 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 3.09336741e+04 -3.05925628e+05 6.63e+05 2.22e-16 9.79e+02 0s 1 9.53441953e+03 -1.65916453e+05 1.01e+05 6.66e-16 1.72e+02 0s 2 4.40897515e+03 -6.24994437e+04 1.44e+04 7.11e-15 3.31e+01 0s 3 3.08137972e+03 -1.25365101e+04 1.55e+03 4.22e-15 5.39e+00 0s 4 2.73288651e+03 -5.78350713e+03 1.40e+02 2.55e-15 2.36e+00 0s 5 2.51984190e+03 -3.32877840e+03 7.78e+01 2.11e-15 1.60e+00 0s 6 2.20000575e+03 -2.47082444e+03 4.65e+01 2.00e-15 1.27e+00 0s 7 1.90361636e+03 -4.64400317e+02 2.24e+01 7.77e-16 6.41e-01 0s 8 1.76219251e+03 1.72588604e+02 1.54e+01 7.29e-16 4.30e-01 0s 9 1.66285498e+03 7.57895778e+02 9.70e+00 6.71e-16 2.44e-01 0s 10 1.58294118e+03 1.11957915e+03 5.17e+00 5.74e-16 1.25e-01 0s 11 1.52163580e+03 1.25172550e+03 2.47e+00 7.73e-16 7.26e-02 0s 12 1.49499472e+03 1.32102371e+03 1.35e+00 8.29e-16 4.67e-02 0s 13 1.47517956e+03 1.38080638e+03 6.04e-01 5.89e-16 2.53e-02 0s 14 1.46243328e+03 1.41878514e+03 2.47e-01 5.70e-16 1.17e-02 0s 15 1.45360076e+03 1.43352477e+03 4.42e-02 8.07e-16 5.38e-03 0s 16 1.45098680e+03 1.44590191e+03 2.99e-03 5.80e-16 1.36e-03 0s 17 1.45062761e+03 1.45055943e+03 6.37e-12 5.97e-16 1.83e-05 0s 18 1.45061111e+03 1.45061111e+03 3.87e-12 5.13e-16 5.52e-10 0s Barrier solved model in 18 iterations and 0.04 seconds Optimal objective 1.45061111e+03 Root relaxation: objective 1.450611e+03, 438 iterations, 0.05 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 1450.61111 0 35 2463.00000 1450.61111 41.1% - 0s H 0 0 1451.0000000 1450.61111 0.03% - 0s Explored 0 nodes (942 simplex iterations) in 0.16 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.451000000000e+03, best bound 1.451000000000e+03, gap 0.0% Preprocessing time: 0.06 seconds Gurobi run time: 0.16 seconds Total run time: 0.22 seconds Objective: 1451 Solution: 9 x [1, 22] 17 x [1, 23] 59 x [1, 25, 37] 12 x [1, 26, 36, 38] 5 x [1, 26, 38] 20 x [1, 29, 32, 38] 31 x [1, 32, 34, 35] 6 x [1, 33, 34] 2 x [1, 33, 34, 35] 4 x [2, 19, 37] 86 x [2, 26, 31] 98 x [3, 25, 33] 13 x [3, 25, 34, 38] 15 x [3, 26, 31] 1 x [3, 34, 38] 28 x [4, 18] 12 x [4, 19, 37] 68 x [4, 20, 35] 8 x [4, 24, 34] 65 x [5, 24, 34] 36 x [5, 30, 32, 34] 38 x [6, 19, 35] 240 x [7, 17] 12 x [7, 19, 35] 23 x [7, 27, 28] 1 x [7, 28] 4 x [7, 32, 33, 34, 38] 6 x [8, 16] 64 x [9, 14] 31 x [9, 15, 36] 1 x [9, 15, 37] 33 x [10, 12] 13 x [10, 13] 73 x [10, 14] 68 x [11, 13, 38] 9 x [15, 16, 35, 37] 74 x [15, 20, 28] 16 x [15, 21, 28] 38 x [16, 20, 28] 112 x [16, 21, 27]