Build (method = -2) #dp: 5400 Step-3' Graph: 119 vertices and 1209 arcs (0.03s) Step-4' Graph: 77 vertices and 1125 arcs (0.03s) #V4/#V3 = 0.65 #A4/#A3 = 0.93 Ready! (0.03s) Optimize a model with 146 rows, 1126 columns and 3229 nonzeros Presolve removed 23 rows and 35 columns Presolve time: 0.02s Presolved: 123 rows, 1091 columns, 3118 nonzeros Variable types: 0 continuous, 1091 integer (274 binary) Found heuristic solution: objective 176.0000000 Found heuristic solution: objective 151.0000000 Optimize a model with 123 rows, 1091 columns and 3118 nonzeros Presolved: 123 rows, 1091 columns, 3118 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 2.046e+03 Factor NZ : 3.796e+03 Factor Ops : 1.676e+05 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 7.18927300e+03 -1.67214573e+04 2.17e+04 2.50e-01 8.12e+01 0s 1 1.98247889e+03 -4.20212582e+03 3.65e+03 5.55e-16 1.39e+01 0s 2 3.38788539e+02 -1.48083938e+03 2.54e+02 2.22e-15 1.50e+00 0s 3 1.68575071e+02 -2.62555252e+02 2.36e+01 3.77e-15 2.34e-01 0s 4 1.18185497e+02 -9.53843148e+01 4.26e+00 2.11e-15 1.01e-01 0s 5 9.80465246e+01 1.74363168e+01 1.92e+00 6.66e-16 3.74e-02 0s 6 8.90439240e+01 5.06273454e+01 1.01e+00 7.01e-16 1.76e-02 0s 7 8.21746612e+01 6.91451413e+01 3.06e-01 6.01e-16 5.92e-03 0s 8 7.95059268e+01 7.39318154e+01 5.86e-02 7.25e-16 2.52e-03 0s 9 7.88841271e+01 7.59375733e+01 2.60e-02 6.89e-16 1.33e-03 0s 10 7.84515862e+01 7.72846076e+01 6.70e-03 6.66e-16 5.26e-04 0s 11 7.82426404e+01 7.79276497e+01 1.07e-03 6.78e-16 1.42e-04 0s 12 7.81998414e+01 7.80724785e+01 4.03e-04 6.05e-16 5.74e-05 0s 13 7.81765259e+01 7.81484019e+01 3.38e-05 6.56e-16 1.27e-05 0s 14 7.81701930e+01 7.81691239e+01 8.33e-08 6.66e-16 4.82e-07 0s 15 7.81700690e+01 7.81700668e+01 1.25e-14 5.85e-16 9.57e-10 0s 16 7.81700680e+01 7.81700680e+01 8.17e-14 9.99e-16 9.86e-16 0s Barrier solved model in 16 iterations and 0.01 seconds Optimal objective 7.81700680e+01 Root relaxation: objective 7.817007e+01, 204 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 78.17007 0 27 151.00000 78.17007 48.2% - 0s H 0 0 80.0000000 78.17007 2.29% - 0s H 0 0 79.0000000 78.17007 1.05% - 0s Explored 0 nodes (658 simplex iterations) in 0.09 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 7.900000000000e+01, best bound 7.900000000000e+01, gap 0.0% Preprocessing time: 0.05 seconds Gurobi run time: 0.09 seconds Total run time: 0.14 seconds Objective: 79 Solution: 1 x [30, 69] 2 x [31, 68] 2 x [30, 68] 2 x [3, 10, 68] 3 x [32, 67] 2 x [33, 66] 1 x [1, 15, 66] 2 x [34, 65] 1 x [1, 16, 65] 2 x [2, 15, 65] 2 x [3, 14, 65] 1 x [5, 12, 65] 1 x [35, 64] 1 x [5, 13, 64] 2 x [37, 63] 2 x [36, 63] 2 x [4, 16, 63] 3 x [9, 11, 63] 1 x [38, 62] 1 x [39, 61] 1 x [4, 19, 61] 2 x [41, 60] 3 x [42, 59] 2 x [9, 18, 58] 1 x [12, 15, 58] 3 x [12, 16, 57] 2 x [43, 56] 1 x [6, 22, 56] 1 x [44, 55] 1 x [8, 22, 55] 4 x [45, 54] 1 x [46, 53] 3 x [7, 26, 53] 1 x [48, 52] 1 x [49, 51] 1 x [50, 50] 1 x [16, 22, 49] 1 x [20, 20, 47] 1 x [17, 26, 45] 1 x [16, 26, 45] 1 x [19, 24, 45] 1 x [7, 45] 2 x [22, 26, 42] 1 x [23, 42] 1 x [19, 29, 41] 2 x [17, 21, 41] 1 x [22, 28, 40] 1 x [23, 27, 40] 2 x [25, 25, 40] 1 x [27, 32, 32]