Build (method = -2) #dp: 124258 Step-3' Graph: 6222 vertices and 18659 arcs (2.26s) Step-4' Graph: 4751 vertices and 15717 arcs (2.31s) #V4/#V3 = 0.76 #A4/#A3 = 0.84 Ready! (2.31s) Optimize a model with 4811 rows, 15718 columns and 37656 nonzeros Presolve removed 73 rows and 118 columns Presolve time: 0.18s Presolved: 4738 rows, 15600 columns, 37586 nonzeros Variable types: 0 continuous, 15600 integer (66 binary) Optimize a model with 4738 rows, 15600 columns and 37586 nonzeros Presolved: 4738 rows, 15600 columns, 37586 nonzeros Root barrier log... Ordering time: 0.19s Barrier statistics: AA' NZ : 2.772e+04 Factor NZ : 4.231e+05 (roughly 10 MBytes of memory) Factor Ops : 9.833e+07 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 6.25836940e+04 -5.70086179e+06 7.78e+06 4.57e-02 1.71e+03 0s 1 1.13095634e+04 -3.64926181e+06 9.46e+05 5.16e-02 2.82e+02 0s 2 4.92887537e+03 -9.33799736e+05 2.06e+05 7.84e-03 5.77e+01 0s 3 2.77442879e+03 -2.51621349e+05 6.26e+04 1.86e-03 1.67e+01 1s 4 1.90439659e+03 -4.10556880e+04 9.69e+03 2.22e-14 2.64e+00 1s 5 1.71114644e+03 -1.24036928e+04 1.26e+03 1.95e-14 5.85e-01 1s 6 1.63902712e+03 -5.49117301e+03 1.34e+02 5.33e-15 2.36e-01 1s 7 1.59161944e+03 -4.36279600e+03 1.09e+02 4.00e-15 1.96e-01 1s 8 1.55973591e+03 -3.25686968e+03 8.58e+01 3.33e-15 1.58e-01 1s 9 1.42643926e+03 -2.62068085e+03 5.27e+01 2.89e-15 1.32e-01 1s 10 1.23714254e+03 -1.51667726e+03 3.49e+01 2.00e-15 8.92e-02 1s 11 9.89382149e+02 -9.44996836e+02 2.63e+01 1.33e-15 6.26e-02 1s 12 8.54791462e+02 -5.37797804e+02 2.11e+01 9.99e-16 4.51e-02 1s 13 7.47502745e+02 -2.16694122e+02 1.67e+01 3.89e-16 3.12e-02 1s 14 6.55561641e+02 -3.95533057e+01 1.27e+01 4.44e-16 2.25e-02 1s 15 5.88381993e+02 1.12529324e+02 9.29e+00 2.50e-16 1.54e-02 1s 16 5.36641444e+02 2.06529784e+02 6.62e+00 3.33e-16 1.07e-02 2s 17 5.04787164e+02 2.62652017e+02 5.15e+00 2.66e-16 7.82e-03 2s 18 4.67453773e+02 3.29093920e+02 3.40e+00 2.39e-16 4.47e-03 2s 19 4.43226911e+02 3.64820335e+02 2.01e+00 2.22e-16 2.54e-03 2s 20 4.30695668e+02 3.90044555e+02 9.74e-01 2.43e-16 1.31e-03 2s 21 4.28130819e+02 3.98940511e+02 8.27e-01 2.22e-16 9.44e-04 2s 22 4.25147367e+02 4.05780294e+02 6.44e-01 2.22e-16 6.28e-04 2s 23 4.21463955e+02 4.10225147e+02 4.12e-01 2.22e-16 3.65e-04 2s 24 4.20208727e+02 4.12118549e+02 3.31e-01 2.30e-16 2.63e-04 2s 25 4.18367941e+02 4.13409948e+02 2.07e-01 2.42e-16 1.61e-04 2s 26 4.17400143e+02 4.14092487e+02 1.41e-01 2.39e-16 1.08e-04 2s 27 4.16477911e+02 4.14386191e+02 8.15e-02 2.95e-16 6.79e-05 2s 28 4.15846586e+02 4.14609763e+02 3.84e-02 2.33e-16 4.00e-05 2s 29 4.15514117e+02 4.14943757e+02 1.56e-02 1.95e-16 1.84e-05 3s 30 4.15394768e+02 4.15062713e+02 7.20e-03 2.22e-16 1.07e-05 3s 31 4.15342244e+02 4.15163890e+02 3.50e-03 2.22e-16 5.75e-06 3s 32 4.15335512e+02 4.15211799e+02 3.05e-03 3.33e-16 4.00e-06 3s 33 4.15290554e+02 4.15284336e+02 1.61e-05 4.44e-16 1.99e-07 3s 34 4.15290001e+02 4.15289994e+02 2.41e-12 3.29e-16 2.01e-10 3s 35 4.15290000e+02 4.15290000e+02 4.75e-12 3.33e-16 2.01e-13 3s Barrier solved model in 35 iterations and 2.93 seconds Optimal objective 4.15290000e+02 Root relaxation: objective 4.152900e+02, 6561 iterations, 3.53 seconds Total elapsed time = 7.18s Total elapsed time = 10.81s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 415.29000 0 289 - 415.29000 - - 14s H 0 0 416.0000000 415.29000 0.17% - 15s Explored 0 nodes (24902 simplex iterations) in 15.39 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 4.160000000000e+02, best bound 4.160000000000e+02, gap 0.0% Preprocessing time: 2.41 seconds Gurobi run time: 15.39 seconds Total run time: 17.80 seconds Objective: 416 Solution: 17 x [5, 24, 29, 53] 2 x [6, 22, 24, 50] 5 x [8, 13, 14, 24, 31, 34, 37, 42, 57] 12 x [1, 6, 26, 53] 7 x [6, 7, 35, 53] 21 x [8, 13, 14, 31, 37, 39, 42, 53, 57] 1 x [1, 35, 36, 47, 53] 6 x [19, 25, 26, 55] 4 x [19, 25, 47, 60] 23 x [1, 19, 29, 51] 7 x [6, 19, 47, 59] 13 x [6, 18, 19, 32, 35, 55] 7 x [3, 6, 25, 29] 22 x [3, 6, 25, 58] 5 x [5, 7, 12, 25, 47, 54] 2 x [5, 7, 21, 23, 25, 47] 9 x [5, 14, 25, 32, 35, 57, 59] 2 x [10, 17, 18, 25, 32, 35, 42, 57, 59] 1 x [10, 17, 18, 25, 38, 42, 59] 11 x [6, 15, 18, 45, 51] 1 x [5, 14, 18, 21, 43, 45, 51, 54] 23 x [9, 10, 11, 13, 15, 23, 34, 39, 45] 11 x [5, 9, 14, 15, 27, 34, 45] 9 x [13, 15, 16, 18, 23, 42, 45, 49] 19 x [4, 11, 23, 31, 44, 45, 47, 48] 19 x [4, 11, 23, 31, 44, 45, 47, 57] 1 x [9, 12, 15, 18, 32, 51] 14 x [9, 10, 13, 15, 23, 30, 34, 51] 1 x [12, 15, 16, 18, 31, 32, 51] 1 x [4, 32, 34, 47, 51, 55] 4 x [4, 23, 34, 44, 47, 51, 54] 9 x [4, 5, 21, 43, 47, 51] 10 x [1, 6, 18, 32, 37, 41, 55] 1 x [6, 14, 23, 31, 37, 41] 7 x [4, 21, 26, 29, 35, 56] 11 x [3, 4, 17, 26, 29, 42] 1 x [4, 26, 29, 43] 1 x [1, 4, 26, 33, 35] 13 x [4, 11, 21, 26, 31, 32, 42, 50] 5 x [4, 14, 26, 27, 32, 52, 57] 4 x [4, 21, 26, 32, 42, 44, 52] 11 x [1, 28, 29, 33, 35] 8 x [5, 11, 17, 28, 32, 35, 52, 60] 21 x [1, 2, 35, 58, 59] 7 x [5, 18, 32, 35, 46, 47, 48, 58] 5 x [15, 26, 36, 40, 59] 6 x [20, 26, 36, 40, 59] 10 x [26, 36, 40, 41, 59] 5 x [11, 12, 15, 17, 31, 32, 33, 36, 60] 1 x [5, 14, 15, 21, 31, 33, 36, 60]