Build (method = -2) #dp: 6129 Step-3' Graph: 113 vertices and 2745 arcs (0.03s) Step-4' Graph: 112 vertices and 2743 arcs (0.03s) #V4/#V3 = 0.99 #A4/#A3 = 1.00 Ready! (0.03s) Optimize a model with 188 rows, 2744 columns and 8014 nonzeros Presolve removed 27 rows and 27 columns Presolve time: 0.04s Presolved: 161 rows, 2717 columns, 7931 nonzeros Variable types: 0 continuous, 2717 integer (392 binary) Found heuristic solution: objective 214.0000000 Found heuristic solution: objective 175.0000000 Optimize a model with 161 rows, 2717 columns and 7931 nonzeros Presolved: 161 rows, 2717 columns, 7931 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 4.836e+03 Factor NZ : 8.034e+03 (roughly 1 MByte of memory) Factor Ops : 5.253e+05 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 6.17311045e+03 -3.94208677e+04 2.67e+04 1.08e-01 6.15e+01 0s 1 1.87429628e+03 -1.33367120e+04 4.09e+03 7.77e-16 1.06e+01 0s 2 5.38771090e+02 -4.90460264e+03 5.19e+02 2.00e-15 1.84e+00 0s 3 2.99692518e+02 -1.18573600e+03 7.61e+01 1.67e-15 3.53e-01 0s 4 2.36032076e+02 -3.52161558e+02 1.78e+01 8.88e-16 1.19e-01 0s 5 2.06174416e+02 -1.68832410e+02 1.11e+01 8.88e-16 7.44e-02 0s 6 1.58545136e+02 -1.00966655e+02 5.62e+00 6.94e-16 5.02e-02 0s 7 1.26909547e+02 -1.26064211e+01 2.87e+00 7.86e-16 2.66e-02 0s 8 1.12420246e+02 5.05341888e+01 1.70e+00 6.87e-16 1.18e-02 0s 9 1.06602151e+02 5.97258264e+01 9.37e-01 7.15e-16 8.79e-03 0s 10 1.02617476e+02 8.14787770e+01 4.51e-01 6.97e-16 3.92e-03 0s 11 9.85438606e+01 8.98904033e+01 1.07e-01 7.33e-16 1.59e-03 0s 12 9.72436692e+01 9.29552940e+01 1.23e-02 9.49e-16 7.83e-04 0s 13 9.69037560e+01 9.47615336e+01 5.68e-03 6.56e-16 3.91e-04 0s 14 9.68029699e+01 9.53591638e+01 4.18e-03 8.04e-16 2.64e-04 0s 15 9.66983027e+01 9.58465098e+01 2.67e-03 6.81e-16 1.56e-04 0s 16 9.66296164e+01 9.61321562e+01 1.63e-03 6.12e-16 9.09e-05 0s 17 9.65802078e+01 9.63097988e+01 7.69e-04 7.50e-16 4.94e-05 0s 18 9.65362900e+01 9.64146078e+01 3.02e-04 6.14e-16 2.22e-05 0s 19 9.65259140e+01 9.64563433e+01 2.25e-04 6.41e-16 1.27e-05 0s 20 9.65279395e+01 9.64958382e+01 1.24e-04 5.55e-16 5.86e-06 0s 21 9.65137939e+01 9.65113215e+01 6.36e-06 5.55e-16 4.51e-07 0s 22 9.65133336e+01 9.65133328e+01 3.73e-10 6.99e-16 1.33e-10 0s 23 9.65133333e+01 9.65133333e+01 9.71e-12 7.15e-16 1.33e-13 0s Barrier solved model in 23 iterations and 0.05 seconds Optimal objective 9.65133333e+01 Root relaxation: objective 9.651333e+01, 1539 iterations, 0.06 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 96.51333 0 39 175.00000 96.51333 44.8% - 0s H 0 0 98.0000000 96.51333 1.52% - 0s H 0 0 97.0000000 96.51333 0.50% - 0s Explored 0 nodes (2615 simplex iterations) in 0.35 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 9.700000000000e+01, best bound 9.700000000000e+01, gap 0.0% Preprocessing time: 0.05 seconds Gurobi run time: 0.35 seconds Total run time: 0.39 seconds Objective: 97 Solution: 1 x [31, 76] 1 x [32, 75] 1 x [33, 74] 3 x [34, 73] 3 x [35, 72] 3 x [36, 71] 4 x [8, 9, 71] 2 x [37, 70] 1 x [6, 12, 70] 1 x [38, 69] 1 x [39, 68] 1 x [1, 22, 67] 2 x [11, 12, 67] 2 x [41, 66] 1 x [10, 14, 66] 1 x [12, 12, 66] 2 x [42, 65] 1 x [43, 64] 2 x [1, 25, 64] 1 x [4, 22, 64] 1 x [7, 19, 64] 1 x [10, 16, 64] 1 x [12, 14, 64] 3 x [44, 63] 1 x [13, 14, 63] 2 x [45, 62] 1 x [13, 15, 62] 1 x [46, 61] 1 x [2, 27, 61] 3 x [6, 23, 61] 1 x [13, 16, 61] 2 x [47, 60] 1 x [10, 20, 60] 1 x [11, 19, 60] 3 x [48, 59] 3 x [2, 29, 59] 1 x [7, 24, 59] 3 x [49, 58] 1 x [3, 58] 3 x [3, 30, 57] 1 x [28, 57] 2 x [5, 29, 56] 4 x [51, 55] 1 x [52, 54] 1 x [53, 53] 1 x [7, 31, 52] 3 x [17, 21, 52] 1 x [17, 20, 52] 1 x [10, 29, 51] 1 x [19, 20, 51] 1 x [17, 23, 50] 2 x [19, 21, 50] 2 x [8, 40, 42] 1 x [22, 27, 42] 1 x [18, 34, 40] 1 x [23, 30, 39] 1 x [13, 39, 39] 2 x [27, 28, 38] 1 x [5, 13, 18, 38] 1 x [11, 18, 19, 26]