Build (method = -2) #dp: 11066 Step-3' Graph: 265 vertices and 788 arcs (0.09s) Step-4' Graph: 74 vertices and 406 arcs (0.09s) #V4/#V3 = 0.28 #A4/#A3 = 0.52 Ready! (0.09s) Optimize a model with 106 rows, 407 columns and 1077 nonzeros Presolve removed 22 rows and 42 columns Presolve time: 0.00s Presolved: 84 rows, 365 columns, 993 nonzeros Variable types: 0 continuous, 365 integer (119 binary) Found heuristic solution: objective 28.0000000 Found heuristic solution: objective 24.0000000 Optimize a model with 84 rows, 365 columns and 993 nonzeros Presolved: 84 rows, 365 columns, 993 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 4.540e+02 Factor NZ : 1.106e+03 Factor Ops : 1.904e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 4.07555969e+02 -1.07960447e+03 5.03e+02 1.01e-01 7.80e+00 0s 1 8.88812280e+01 -4.01648037e+02 3.62e+01 4.44e-16 1.03e+00 0s 2 3.24057775e+01 -5.52187846e+01 9.15e-14 3.89e-16 1.18e-01 0s 3 1.35591063e+01 -2.44327932e+00 5.88e-14 2.71e-16 2.16e-02 0s 4 8.67514302e+00 3.31122819e+00 3.57e-14 2.14e-16 7.23e-03 0s 5 7.50302792e+00 6.72218993e+00 1.35e-14 2.13e-16 1.05e-03 0s 6 7.14338020e+00 7.13801712e+00 1.71e-13 1.45e-16 7.23e-06 0s 7 7.14285714e+00 7.14285714e+00 1.52e-14 2.22e-16 7.81e-12 0s Barrier solved model in 7 iterations and 0.00 seconds Optimal objective 7.14285714e+00 Root relaxation: objective 7.142857e+00, 248 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 7.14286 0 8 24.00000 7.14286 70.2% - 0s H 0 0 8.0000000 7.14286 10.7% - 0s Explored 0 nodes (386 simplex iterations) in 0.02 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0% Preprocessing time: 0.10 seconds Gurobi run time: 0.02 seconds Total run time: 0.11 seconds Objective: 8 Solution: 1 x [5, 11, 16, 20, 20, 30, 32] 1 x [4, 5, 5, 18, 25, 28, 31] 1 x [3, 10, 14, 22, 24, 25, 27] 1 x [2, 10, 11, 23, 25, 29, 30] 1 x [1, 10, 11, 12, 13, 19, 25] 1 x [6, 8, 9, 15, 23, 26, 30] 1 x [7, 8, 15, 16, 17, 21, 26] 1 x [13]