Build (method = -2) #dp: 98540 Step-3' Graph: 906 vertices and 17069 arcs (0.99s) Step-4' Graph: 707 vertices and 16697 arcs (1.00s) #V4/#V3 = 0.78 #A4/#A3 = 0.98 Ready! (1.00s) Optimize a model with 776 rows, 16698 columns and 48658 nonzeros Presolve removed 37 rows and 56 columns Presolve time: 0.34s Presolved: 739 rows, 16642 columns, 48639 nonzeros Variable types: 0 continuous, 16642 integer (11034 binary) Found heuristic solution: objective 47.0000000 Optimize a model with 739 rows, 16642 columns and 48639 nonzeros Presolved: 739 rows, 16642 columns, 48639 nonzeros Root barrier log... Ordering time: 0.02s Barrier statistics: AA' NZ : 3.108e+04 Factor NZ : 1.009e+05 (roughly 8 MBytes of memory) Factor Ops : 1.901e+07 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 8.24074905e+03 -1.89488755e+05 1.28e+05 8.39e-02 3.19e+01 0s 1 2.70112043e+03 -5.19786424e+04 2.77e+04 7.77e-16 7.13e+00 0s 2 7.43598845e+02 -1.82412188e+04 4.36e+03 6.66e-16 1.40e+00 0s 3 4.32839465e+02 -9.04465307e+03 9.52e+02 3.55e-15 4.61e-01 0s 4 2.76395344e+02 -2.66942703e+03 2.34e+02 2.72e-15 1.28e-01 0s 5 1.98950690e+02 -1.21476191e+03 1.03e+02 2.37e-15 5.86e-02 0s 6 1.50100807e+02 -8.65649058e+02 5.25e+01 2.69e-15 3.81e-02 0s 7 1.22148182e+02 -6.04152668e+02 3.25e+01 3.23e-15 2.60e-02 0s 8 1.01036550e+02 -3.63007745e+02 1.80e+01 3.35e-15 1.59e-02 0s 9 8.01231303e+01 -3.05040359e+02 1.12e+01 3.11e-15 1.27e-02 0s 10 6.51080555e+01 -2.07064503e+02 8.59e+00 2.79e-15 8.99e-03 0s 11 4.43551863e+01 -1.07547862e+02 4.38e+00 2.81e-15 4.90e-03 0s 12 3.36343615e+01 -5.57291596e+01 3.15e+00 2.57e-15 2.88e-03 0s 13 2.39234132e+01 -2.65575399e+01 2.00e+00 1.49e-15 1.62e-03 0s 14 1.79039337e+01 -1.70960826e+01 1.29e+00 2.35e-15 1.11e-03 0s 15 1.65070010e+01 -1.06156359e+01 1.04e+00 2.78e-15 8.54e-04 0s 16 1.52921772e+01 -3.40569511e+00 7.93e-01 2.52e-15 5.84e-04 0s 17 1.46686131e+01 2.49242906e+00 6.22e-01 4.88e-15 3.79e-04 0s 18 1.39657004e+01 7.60879613e+00 4.31e-01 4.74e-15 1.97e-04 0s 19 1.27971854e+01 1.09300953e+01 4.09e-02 1.83e-15 5.65e-05 0s 20 1.25057080e+01 1.23646168e+01 9.21e-05 2.68e-15 4.24e-06 0s 21 1.25000046e+01 1.24999131e+01 1.46e-08 1.46e-15 2.75e-09 0s 22 1.25000000e+01 1.25000000e+01 3.57e-13 3.17e-15 2.86e-15 1s Barrier solved model in 22 iterations and 0.51 seconds Optimal objective 1.25000000e+01 Root relaxation: objective 1.250000e+01, 11509 iterations, 0.70 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 12.50000 0 98 47.00000 12.50000 73.4% - 2s H 0 0 13.0000000 12.50000 3.85% - 3s Explored 0 nodes (17317 simplex iterations) in 3.02 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.300000000000e+01, best bound 1.300000000000e+01, gap 0.0% Preprocessing time: 1.06 seconds Gurobi run time: 3.02 seconds Total run time: 4.08 seconds Objective: 13 Solution: 1 x [3, 11, 20, 23, 30, 37, 52, 66] 1 x [23, 34, 36, 39, 39, 40, 42, 69] 1 x [5, 9, 22, 27, 46, 48, 54, 55] 1 x [18, 21, 25, 28, 33, 42, 65] 1 x [8, 19, 35, 43, 47, 49, 50, 55] 1 x [1, 12, 13, 17, 26, 31, 41, 61] 1 x [8, 17, 28, 29, 50, 51, 53, 63] 1 x [4, 16, 32, 43, 49, 49, 60, 64] 1 x [4, 10, 15, 26, 30, 30, 44, 64] 1 x [4, 15, 24, 41, 56, 61] 1 x [15, 34, 42, 43, 56, 58, 59, 61] 1 x [2, 6, 7, 14, 26, 26, 45, 68] 1 x [38, 43, 57, 60, 62, 63, 67]