Build (method = -2) #dp: 1142 Step-3' Graph: 52 vertices and 178 arcs (0.00s) Step-4' Graph: 24 vertices and 122 arcs (0.00s) #V4/#V3 = 0.46 #A4/#A3 = 0.69 Ready! (0.00s) Optimize a model with 79 rows, 123 columns and 326 nonzeros Presolve removed 44 rows and 49 columns Presolve time: 0.00s Presolved: 35 rows, 74 columns, 184 nonzeros Variable types: 0 continuous, 74 integer (7 binary) Found heuristic solution: objective 82.0000000 Found heuristic solution: objective 59.0000000 Optimize a model with 35 rows, 74 columns and 184 nonzeros Presolved: 35 rows, 74 columns, 184 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 6.700e+01 Factor NZ : 5.140e+02 Factor Ops : 1.050e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.20035182e+03 -1.00186815e+03 8.59e+01 2.22e-16 3.99e+01 0s 1 2.87529256e+02 -3.07994561e+02 1.04e+01 6.11e-16 5.87e+00 0s 2 8.65912760e+01 -1.27456001e+00 7.65e-02 1.05e-14 5.44e-01 0s 3 6.77643876e+01 4.04664306e+01 3.40e-04 2.89e-15 1.66e-01 0s 4 5.77771171e+01 5.39482375e+01 2.66e-05 1.67e-16 2.33e-02 0s 5 5.72915328e+01 5.65611674e+01 8.19e-06 2.22e-16 4.45e-03 0s 6 5.70103608e+01 5.69875705e+01 3.40e-07 4.44e-16 1.39e-04 0s 7 5.70000013e+01 5.69999980e+01 1.22e-11 2.22e-16 1.98e-08 0s 8 5.70000000e+01 5.70000000e+01 2.55e-11 6.66e-16 1.98e-11 0s Barrier solved model in 8 iterations and 0.00 seconds Optimal objective 5.70000000e+01 Root relaxation: objective 5.700000e+01, 30 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 57.00000 0 4 59.00000 57.00000 3.39% - 0s H 0 0 58.0000000 57.00000 1.72% - 0s * 0 0 0 57.0000000 57.00000 0.0% - 0s Cutting planes: Gomory: 2 Zero half: 2 Explored 0 nodes (33 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 5.700000000000e+01, best bound 5.700000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.01 seconds Total run time: 0.02 seconds Objective: 57 Solution: 2 x [55] 2 x [54] 3 x [53] 1 x [52] 1 x [51] 1 x [50] 2 x [49] 1 x [48] 1 x [1, 47] 1 x [2, 46] 1 x [1, 46] 1 x [3, 45] 2 x [4, 44] 2 x [3, 43] 2 x [6, 42] 1 x [7, 41] 1 x [5, 41] 1 x [8, 40] 1 x [39] 1 x [4, 39] 1 x [9, 38] 1 x [11, 37] 2 x [12, 36] 1 x [9, 35] 2 x [14, 34] 1 x [15, 33] 2 x [10, 32] 1 x [18, 31] 3 x [16, 31] 1 x [19, 30] 2 x [20, 29] 1 x [19, 28] 1 x [21, 27] 2 x [22, 26] 2 x [23, 25] 1 x [18, 25] 1 x [21, 24] 1 x [19, 22] 1 x [9, 17] 2 x [13, 13]