Build (method = -2) #dp: 8755 Step-3' Graph: 1181 vertices and 3536 arcs (0.06s) Step-4' Graph: 860 vertices and 2894 arcs (0.06s) #V4/#V3 = 0.73 #A4/#A3 = 0.82 Ready! (0.06s) Optimize a model with 879 rows, 2895 columns and 6969 nonzeros Presolve removed 198 rows and 400 columns Presolve time: 0.05s Presolved: 681 rows, 2495 columns, 6722 nonzeros Variable types: 0 continuous, 2495 integer (0 binary) Optimize a model with 681 rows, 2495 columns and 6722 nonzeros Presolved: 681 rows, 2495 columns, 6722 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 4.603e+03 Factor NZ : 3.234e+04 (roughly 2 MBytes of memory) Factor Ops : 3.002e+06 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 4.03419782e+03 -1.34415855e+05 3.57e+05 2.10e-02 3.82e+02 0s 1 1.30196922e+03 -8.67863210e+04 4.77e+04 2.77e-02 6.29e+01 0s 2 6.69047228e+02 -2.85686045e+04 8.14e+03 5.94e-15 1.27e+01 0s 3 3.92399744e+02 -6.85480937e+03 1.09e+03 3.66e-15 2.26e+00 0s 4 3.08691411e+02 -1.83048595e+03 4.46e+02 3.86e-15 7.07e-01 0s 5 2.94921420e+02 -1.14342427e+03 3.18e+02 5.46e-15 4.70e-01 0s 6 2.65711926e+02 -2.15376310e+02 7.19e+01 3.72e-15 1.29e-01 0s 7 2.48947776e+02 3.39291556e-01 1.80e+01 4.59e-15 5.61e-02 0s 8 2.33351576e+02 1.44219163e+02 4.01e+00 4.66e-15 1.87e-02 0s 9 2.24178836e+02 1.85999181e+02 1.19e+00 4.66e-15 7.85e-03 0s 10 2.19612700e+02 2.12074078e+02 1.57e-01 3.77e-15 1.53e-03 0s 11 2.19073927e+02 2.18689090e+02 1.74e-02 3.49e-15 7.90e-05 0s 12 2.19001392e+02 2.18999151e+02 2.97e-04 4.75e-15 4.79e-07 0s 13 2.19000002e+02 2.18999999e+02 2.04e-09 3.48e-15 4.78e-10 0s 14 2.19000000e+02 2.19000000e+02 7.34e-10 4.73e-15 4.78e-13 0s Barrier solved model in 14 iterations and 0.08 seconds Optimal objective 2.19000000e+02 Root relaxation: objective 2.190000e+02, 1583 iterations, 0.09 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 219.0000000 219.00000 0.0% - 0s Explored 0 nodes (1583 simplex iterations) in 0.20 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.190000000000e+02, best bound 2.190000000000e+02, gap 0.0% Preprocessing time: 0.08 seconds Gurobi run time: 0.20 seconds Total run time: 0.29 seconds Objective: 219 Solution: 12 x [1, 4, 5, 6, 10, 13, 14, 17, 18, 19] 34 x [2, 3, 4, 5, 11, 12, 13, 14, 16, 17, 18] 3 x [2, 4, 5, 10, 11, 13, 14, 17] 1 x [2, 4, 5, 10, 11, 13, 14, 17, 18] 7 x [2, 4, 5, 10, 13, 14, 17] 3 x [2, 4, 5, 10, 19] 3 x [2, 4, 5, 19] 3 x [3, 4, 5, 6, 7, 8, 13, 14, 17, 19] 4 x [4, 5, 6] 12 x [4, 5, 6, 7, 8, 13, 14, 17, 19] 30 x [4, 5, 6, 7, 10, 11, 13, 14, 15, 17, 18, 19] 7 x [4, 5, 6, 7, 11, 13, 14, 16, 17, 18] 11 x [4, 5, 6, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19] 5 x [4, 5, 6, 10, 11, 13, 14, 15, 16, 17, 18, 19] 11 x [4, 5, 6, 10, 13, 14, 17] 6 x [4, 5, 6, 10, 14, 17] 2 x [4, 5, 6, 11, 13, 14, 16, 17, 18] 3 x [4, 5, 6, 11, 13, 14, 17, 18] 1 x [4, 5, 6, 14] 1 x [4, 5, 6, 14, 17] 3 x [4, 5, 6, 19] 3 x [4, 5, 9, 10, 13, 14, 17] 2 x [4, 5, 10, 11, 13, 14, 15, 16, 17, 18, 19] 13 x [4, 5, 10, 11, 13, 14, 16, 17, 18, 19] 12 x [4, 5, 10, 11, 13, 14, 17, 18] 12 x [4, 5, 10, 11, 13, 14, 17, 18, 19] 6 x [4, 5, 10, 14, 17] 6 x [4, 5, 14, 17] 1 x [4, 5, 19] 2 x [5, 19]