current bounds on the number of colors: 0 -- 54 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:28:17 2012 Optimize a model with 19197 rows, 2167 columns and 58887 nonzeros Presolve time: 0.08s Presolved: 19197 rows, 2167 columns, 58887 nonzeros Variable types: 0 continuous, 2167 integer (2167 binary) Root relaxation: objective 0.000000e+00, 122 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (500 simplex iterations) in 0.14 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 27 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:28:17 2012 Optimize a model with 9271 rows, 1411 columns and 28353 nonzeros Presolve time: 0.03s Presolved: 9271 rows, 1411 columns, 28353 nonzeros Variable types: 0 continuous, 1411 integer (1411 binary) Root relaxation: objective 0.000000e+00, 110 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 40 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (854 simplex iterations) in 0.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:28:18 2012 Optimize a model with 4308 rows, 1033 columns and 13086 nonzeros Presolve time: 0.01s Presolved: 4308 rows, 1033 columns, 13086 nonzeros Variable types: 0 continuous, 1033 integer (1033 binary) Root relaxation: objective 0.000000e+00, 113 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 90 - 0.00000 - - 0s 0 0 0.00000 0 100 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2583 simplex iterations) in 0.39 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - current bounds on the number of colors: 6 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:28:18 2012 Optimize a model with 6435 rows, 1195 columns and 19629 nonzeros Presolve time: 0.02s Presolved: 6435 rows, 1195 columns, 19629 nonzeros Variable types: 0 continuous, 1195 integer (1195 binary) Root relaxation: objective 0.000000e+00, 125 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 36 - 0.00000 - - 0s 0 0 0.00000 0 71 - 0.00000 - - 0s 0 0 0.00000 0 173 - 0.00000 - - 1s 0 0 0.00000 0 232 - 0.00000 - - 1s 0 0 0.00000 0 144 - 0.00000 - - 2s 0 0 0.00000 0 154 - 0.00000 - - 2s 0 0 0.00000 0 191 - 0.00000 - - 3s 0 0 0.00000 0 175 - 0.00000 - - 4s 0 0 0.00000 0 176 - 0.00000 - - 5s 0 0 0.00000 0 135 - 0.00000 - - 5s 0 2 0.00000 0 129 - 0.00000 - - 6s 359 9 infeasible 16 - 0.00000 - 120 10s 607 23 0.00000 0 115 - 0.00000 - 118 16s 610 25 0.00000 0 132 - 0.00000 - 118 20s 618 28 0.00000 15 176 - 0.00000 - 173 25s 834 10 0.00000 24 138 - 0.00000 - 165 30s Cutting planes: Clique: 49 Zero half: 2 Explored 1171 nodes (224859 simplex iterations) in 34.88 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - current bounds on the number of colors: 9 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:28:53 2012 Optimize a model with 7853 rows, 1303 columns and 23991 nonzeros Presolve time: 0.02s Presolved: 7853 rows, 1303 columns, 23991 nonzeros Variable types: 0 continuous, 1303 integer (1303 binary) Root relaxation: objective 0.000000e+00, 111 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 54 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Gomory: 2 Clique: 61 MIR: 15 Zero half: 53 Explored 0 nodes (1259 simplex iterations) in 0.13 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 9 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:28:53 2012 Optimize a model with 7144 rows, 1249 columns and 21810 nonzeros Presolve time: 0.02s Presolved: 7144 rows, 1249 columns, 21810 nonzeros Variable types: 0 continuous, 1249 integer (1249 binary) Root relaxation: objective 0.000000e+00, 123 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 54 - 0.00000 - - 0s 0 0 0.00000 0 36 - 0.00000 - - 0s 0 0 0.00000 0 138 - 0.00000 - - 1s 0 0 0.00000 0 160 - 0.00000 - - 1s 0 0 0.00000 0 93 - 0.00000 - - 1s 0 0 0.00000 0 102 - 0.00000 - - 2s 0 0 0.00000 0 66 - 0.00000 - - 2s * 0 0 0 0.0000000 0.00000 0.0% - 2s Cutting planes: Clique: 26 Zero half: 29 Explored 0 nodes (18804 simplex iterations) in 2.73 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% optimal solution found: number of colors: 10