Build (method = -2) #dp: 3774 Step-3' Graph: 87 vertices and 1564 arcs (0.02s) Step-4' Graph: 87 vertices and 1564 arcs (0.02s) #V4/#V3 = 1.00 #A4/#A3 = 1.00 Ready! (0.02s) Optimize a model with 158 rows, 1565 columns and 4529 nonzeros Presolve removed 27 rows and 35 columns Presolve time: 0.02s Presolved: 131 rows, 1530 columns, 4412 nonzeros Variable types: 0 continuous, 1530 integer (23 binary) Found heuristic solution: objective 471.0000000 Found heuristic solution: objective 412.0000000 Optimize a model with 131 rows, 1530 columns and 4412 nonzeros Presolved: 131 rows, 1530 columns, 4412 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 2.374e+03 Factor NZ : 4.530e+03 Factor Ops : 2.156e+05 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 6.51525354e+03 -2.58322990e+04 3.97e+04 5.72e-02 6.88e+01 0s 1 1.96296334e+03 -8.36255884e+03 6.69e+03 6.66e-16 1.26e+01 0s 2 5.75832425e+02 -2.94600521e+03 4.78e+02 9.33e-15 1.66e+00 0s 3 4.13845403e+02 -1.07003492e+03 4.47e+01 3.41e-15 5.12e-01 0s 4 2.97878141e+02 -9.13426797e+01 4.55e+00 2.69e-15 1.28e-01 0s 5 2.53172580e+02 1.98313357e+01 1.68e+00 3.35e-15 7.58e-02 0s 6 2.35045920e+02 1.34269248e+02 8.79e-01 2.17e-15 3.27e-02 0s 7 2.25354708e+02 1.74686104e+02 2.82e-01 2.35e-15 1.64e-02 0s 8 2.18016417e+02 2.00197764e+02 4.24e-02 2.55e-15 5.74e-03 0s 9 2.16218940e+02 2.08353593e+02 1.17e-02 2.22e-15 2.53e-03 0s 10 2.15470294e+02 2.13181637e+02 1.98e-03 2.72e-15 7.37e-04 0s 11 2.15228076e+02 2.14833879e+02 4.23e-04 3.01e-15 1.27e-04 0s 12 2.15147239e+02 2.15108609e+02 2.72e-05 2.89e-15 1.24e-05 0s 13 2.15137406e+02 2.15135087e+02 1.14e-07 2.74e-15 7.47e-07 0s 14 2.15137255e+02 2.15137253e+02 3.21e-11 2.89e-15 6.91e-10 0s 15 2.15137255e+02 2.15137255e+02 1.12e-13 2.33e-15 2.18e-15 0s Barrier solved model in 15 iterations and 0.02 seconds Optimal objective 2.15137255e+02 Root relaxation: objective 2.151373e+02, 256 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 215.13725 0 56 412.00000 215.13725 47.8% - 0s H 0 0 217.0000000 215.13725 0.86% - 0s H 0 0 216.0000000 215.13725 0.40% - 0s Explored 0 nodes (358 simplex iterations) in 0.09 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.160000000000e+02, best bound 2.160000000000e+02, gap 0.0% Preprocessing time: 0.03 seconds Gurobi run time: 0.09 seconds Total run time: 0.12 seconds Objective: 216 Solution: 1 x [71] 1 x [21, 71] 2 x [20, 71] 7 x [22, 70] 5 x [21, 70] 9 x [23, 69] 7 x [24, 68] 5 x [25, 67] 3 x [24, 66] 5 x [26, 65] 1 x [25, 65] 1 x [24, 65] 7 x [28, 64] 5 x [29, 63] 2 x [30, 62] 1 x [29, 62] 1 x [28, 62] 3 x [27, 62] 9 x [31, 61] 5 x [32, 60] 2 x [1, 2, 60] 4 x [33, 59] 5 x [34, 58] 2 x [1, 4, 58] 3 x [1, 5, 57] 2 x [2, 4, 57] 3 x [3, 3, 57] 5 x [36, 56] 1 x [4, 56] 7 x [37, 55] 1 x [35, 55] 3 x [38, 54] 4 x [39, 53] 3 x [40, 52] 8 x [41, 51] 1 x [4, 8, 51] 7 x [42, 50] 8 x [43, 49] 2 x [7, 7, 49] 7 x [44, 48] 3 x [6, 9, 48] 1 x [45, 47] 2 x [2, 14, 47] 4 x [6, 10, 47] 2 x [7, 9, 47] 2 x [8, 8, 47] 2 x [46, 46] 4 x [5, 13, 45] 1 x [6, 12, 45] 2 x [7, 14, 42] 2 x [11, 12, 40] 3 x [12, 12, 39] 1 x [9, 16, 38] 3 x [11, 14, 38] 1 x [12, 38] 1 x [8, 16, 37] 3 x [13, 13, 37] 3 x [11, 16, 36] 1 x [14, 16, 33] 3 x [15, 15, 33] 1 x [16, 16, 31] 5 x [17, 19, 26] 4 x [20, 20, 23] 2 x [17, 18, 19] 2 x [18, 18, 19]