Build (method = -2) #dp: 5428 Step-3' Graph: 1047 vertices and 3134 arcs (0.04s) Step-4' Graph: 471 vertices and 1982 arcs (0.04s) #V4/#V3 = 0.45 #A4/#A3 = 0.63 Ready! (0.04s) Optimize a model with 509 rows, 1983 columns and 5011 nonzeros Presolve removed 80 rows and 134 columns Presolve time: 0.03s Presolved: 429 rows, 1849 columns, 4978 nonzeros Variable types: 0 continuous, 1849 integer (102 binary) Found heuristic solution: objective 259.0000000 Found heuristic solution: objective 251.0000000 Found heuristic solution: objective 249.0000000 Optimize a model with 429 rows, 1849 columns and 4978 nonzeros Presolved: 429 rows, 1849 columns, 4978 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 3.410e+03 Factor NZ : 1.520e+04 (roughly 1 MByte of memory) Factor Ops : 8.514e+05 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 3.15430188e+03 -3.10477484e+04 6.77e+04 2.22e-16 9.99e+01 0s 1 9.60782930e+02 -1.69098517e+04 1.03e+04 5.55e-16 1.75e+01 0s 2 4.48002142e+02 -6.39248499e+03 1.51e+03 7.77e-16 3.43e+00 0s 3 3.09795551e+02 -1.24583764e+03 1.47e+02 1.09e-14 5.32e-01 0s 4 2.75439943e+02 -5.37693619e+02 3.44e+01 4.88e-15 2.37e-01 0s 5 2.47055031e+02 -2.98267766e+02 1.59e+01 3.22e-15 1.53e-01 0s 6 2.21620416e+02 -1.15031072e+02 8.74e+00 1.89e-15 9.36e-02 0s 7 2.09081791e+02 -7.27332753e+01 6.56e+00 1.78e-15 7.79e-02 0s 8 1.86124091e+02 1.23107130e+01 4.61e+00 1.11e-15 4.81e-02 0s 9 1.70422205e+02 6.97400486e+01 2.84e+00 3.33e-16 2.78e-02 0s 10 1.58480072e+02 1.08430168e+02 1.03e+00 3.00e-16 1.36e-02 0s 11 1.55656415e+02 1.27730488e+02 7.44e-01 3.19e-16 7.61e-03 0s 12 1.52870552e+02 1.34736915e+02 5.07e-01 3.15e-16 4.94e-03 0s 13 1.51584901e+02 1.39756356e+02 3.96e-01 3.17e-16 3.23e-03 0s 14 1.48062544e+02 1.42384138e+02 1.20e-01 3.18e-16 1.54e-03 0s 15 1.46931710e+02 1.44429761e+02 3.91e-02 3.40e-16 6.76e-04 0s 16 1.46308679e+02 1.45982415e+02 6.32e-03 3.34e-16 8.83e-05 0s 17 1.46267366e+02 1.46144628e+02 4.41e-03 2.66e-16 3.35e-05 0s 18 1.46197516e+02 1.46161785e+02 8.64e-04 2.85e-16 9.69e-06 0s 19 1.46176892e+02 1.46176285e+02 1.52e-05 3.33e-16 1.65e-07 0s 20 1.46176471e+02 1.46176471e+02 1.42e-10 3.50e-16 1.54e-12 0s Barrier solved model in 20 iterations and 0.05 seconds Optimal objective 1.46176471e+02 Root relaxation: objective 1.461765e+02, 432 iterations, 0.05 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 146.17647 0 40 249.00000 146.17647 41.3% - 0s H 0 0 147.0000000 146.17647 0.56% - 0s Explored 0 nodes (1125 simplex iterations) in 0.16 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.470000000000e+02, best bound 1.470000000000e+02, gap 0.0% Preprocessing time: 0.06 seconds Gurobi run time: 0.16 seconds Total run time: 0.22 seconds Objective: 147 Solution: 1 x [1, 22] 2 x [1, 23] 3 x [1, 24] 2 x [1, 26, 36, 38] 1 x [1, 32, 34, 35] 7 x [1, 33, 34, 35] 3 x [2, 19, 37] 6 x [2, 26, 31] 1 x [3, 20, 36] 5 x [3, 25, 32] 3 x [3, 25, 34, 38] 4 x [3, 26, 31] 4 x [4, 24, 34] 4 x [4, 25, 30] 4 x [4, 25, 33, 38] 3 x [5, 18] 5 x [5, 20, 35] 2 x [5, 29, 32, 34] 3 x [6, 19, 35] 1 x [6, 19, 36, 38] 24 x [7, 17] 1 x [7, 25, 32, 37] 3 x [7, 27, 28] 1 x [8, 16] 8 x [9, 13] 1 x [9, 15, 37] 1 x [9, 37] 3 x [10, 12] 7 x [10, 14] 2 x [10, 16, 37] 7 x [11, 14] 12 x [15, 20, 28] 2 x [16, 21] 11 x [16, 21, 27]