Build (method = -2) #dp: 3889 Step-3' Graph: 103 vertices and 1593 arcs (0.02s) Step-4' Graph: 102 vertices and 1591 arcs (0.02s) #V4/#V3 = 0.99 #A4/#A3 = 1.00 Ready! (0.02s) Optimize a model with 165 rows, 1592 columns and 4576 nonzeros Presolve removed 35 rows and 39 columns Presolve time: 0.03s Presolved: 130 rows, 1553 columns, 4487 nonzeros Variable types: 0 continuous, 1553 integer (693 binary) Found heuristic solution: objective 73.0000000 Found heuristic solution: objective 68.0000000 Optimize a model with 130 rows, 1553 columns and 4487 nonzeros Presolved: 130 rows, 1553 columns, 4487 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 3.371e+03 Factor NZ : 6.046e+03 Factor Ops : 3.734e+05 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 2.76969418e+03 -5.60466272e+03 4.32e+03 1.73e-01 2.62e+01 0s 1 6.70429800e+02 -2.49099999e+03 8.06e+02 7.77e-16 5.19e+00 0s 2 1.62839716e+02 -9.37501375e+02 5.69e+01 6.66e-16 6.14e-01 0s 3 8.97923223e+01 -1.09842323e+02 4.02e+00 4.44e-16 7.52e-02 0s 4 6.48801795e+01 1.26882780e+00 1.12e+00 4.44e-16 2.22e-02 0s 5 5.23040574e+01 1.94302471e+01 4.12e-01 3.35e-16 1.10e-02 0s 6 4.72650950e+01 2.96979895e+01 2.21e-01 3.48e-16 5.84e-03 0s 7 4.39435507e+01 3.48034468e+01 9.39e-02 3.23e-16 3.00e-03 0s 8 4.27334922e+01 3.81964732e+01 5.14e-02 3.53e-16 1.49e-03 0s 9 4.20242739e+01 4.01440567e+01 2.26e-02 3.33e-16 6.15e-04 0s 10 4.15311814e+01 4.07569850e+01 8.43e-03 2.74e-16 2.52e-04 0s 11 4.13775676e+01 4.08871483e+01 4.91e-03 3.15e-16 1.59e-04 0s 12 4.12800898e+01 4.09796017e+01 2.57e-03 3.48e-16 9.71e-05 0s 13 4.12566518e+01 4.10837229e+01 1.87e-03 4.34e-16 5.58e-05 0s 14 4.12344860e+01 4.10940908e+01 1.28e-03 3.33e-16 4.52e-05 0s 15 4.12154243e+01 4.11471970e+01 5.56e-04 3.68e-16 2.19e-05 0s 16 4.12037943e+01 4.11752492e+01 3.17e-04 3.02e-16 9.18e-06 0s 17 4.11965838e+01 4.11777013e+01 1.92e-04 3.04e-16 6.07e-06 0s 18 4.11869739e+01 4.11831561e+01 3.08e-05 4.44e-16 1.23e-06 0s 19 4.11842378e+01 4.11842024e+01 2.26e-07 2.47e-16 1.13e-08 0s 20 4.11842105e+01 4.11842105e+01 6.54e-12 4.44e-16 1.18e-13 0s Barrier solved model in 20 iterations and 0.02 seconds Optimal objective 4.11842105e+01 Root relaxation: objective 4.118421e+01, 127 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 41.18421 0 37 68.00000 41.18421 39.4% - 0s H 0 0 42.0000000 41.18421 1.94% - 0s Explored 0 nodes (343 simplex iterations) in 0.09 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 4.200000000000e+01, best bound 4.200000000000e+01, gap 0.0% Preprocessing time: 0.03 seconds Gurobi run time: 0.09 seconds Total run time: 0.12 seconds Objective: 42 Solution: 1 x [1, 13, 63] 1 x [5, 63] 1 x [5, 62] 1 x [14, 61] 1 x [8, 10, 60] 1 x [59] 1 x [16, 58] 1 x [17, 57] 1 x [22, 56] 1 x [21, 56] 1 x [23, 55] 2 x [3, 21, 54] 1 x [6, 18, 54] 1 x [24, 53] 1 x [25, 52] 1 x [26, 51] 1 x [25, 51] 1 x [9, 17, 50] 2 x [27, 49] 2 x [28, 48] 1 x [30, 47] 1 x [30, 46] 2 x [12, 19, 46] 2 x [33, 45] 1 x [2, 32, 44] 1 x [4, 31, 43] 1 x [8, 29, 43] 1 x [35, 42] 1 x [34, 42] 1 x [17, 18, 42] 1 x [37, 41] 2 x [37, 40] 1 x [3, 36, 39] 1 x [11, 11, 39] 1 x [7, 34, 38] 1 x [10, 15, 20, 25]