current bounds on the number of colors: 0 -- 41 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:00:35 2012 Optimize a model with 8181 rows, 1227 columns and 25240 nonzeros Presolve time: 0.03s Presolved: 8181 rows, 1227 columns, 25240 nonzeros Variable types: 0 continuous, 1227 integer (1227 binary) Root relaxation: objective 0.000000e+00, 89 iterations, 0.01 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 (218 simplex iterations) in 0.05 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 -- 20 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:00:35 2012 Optimize a model with 4111 rows, 817 columns and 12620 nonzeros Presolve time: 0.01s Presolved: 4111 rows, 817 columns, 12620 nonzeros Variable types: 0 continuous, 817 integer (817 binary) Root relaxation: objective 0.000000e+00, 86 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 32 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (608 simplex iterations) in 0.04 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 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:00:35 2012 Optimize a model with 2076 rows, 612 columns and 6310 nonzeros Presolve time: 0.01s Presolved: 2076 rows, 612 columns, 6310 nonzeros Variable types: 0 continuous, 612 integer (612 binary) Root relaxation: objective 0.000000e+00, 82 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 52 - 0.00000 - - 0s 0 0 0.00000 0 50 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1213 simplex iterations) in 0.12 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: 5 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:00:35 2012 Optimize a model with 2890 rows, 694 columns and 8834 nonzeros Presolve time: 0.01s Presolved: 2890 rows, 694 columns, 8834 nonzeros Variable types: 0 continuous, 694 integer (694 binary) Root relaxation: objective 0.000000e+00, 96 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 65 - 0.00000 - - 0s 0 0 0.00000 0 30 - 0.00000 - - 0s 0 0 0.00000 0 199 - 0.00000 - - 0s 0 0 0.00000 0 205 - 0.00000 - - 0s 0 0 0.00000 0 189 - 0.00000 - - 0s 0 0 0.00000 0 180 - 0.00000 - - 1s 0 0 0.00000 0 178 - 0.00000 - - 1s 0 0 0.00000 0 177 - 0.00000 - - 1s 0 0 0.00000 0 194 - 0.00000 - - 2s 0 0 0.00000 0 186 - 0.00000 - - 2s 0 0 0.00000 0 184 - 0.00000 - - 2s 0 0 0.00000 0 206 - 0.00000 - - 3s 0 0 0.00000 0 197 - 0.00000 - - 3s 0 2 0.00000 0 197 - 0.00000 - - 3s Cutting planes: Clique: 54 Zero half: 15 Explored 9 nodes (27597 simplex iterations) in 3.73 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: 7 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:00:39 2012 Optimize a model with 3297 rows, 735 columns and 10096 nonzeros Presolve time: 0.01s Presolved: 3297 rows, 735 columns, 10096 nonzeros Variable types: 0 continuous, 735 integer (735 binary) Root relaxation: objective 0.000000e+00, 85 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 30 - 0.00000 - - 0s 0 0 0.00000 0 35 - 0.00000 - - 0s 0 0 0.00000 0 40 - 0.00000 - - 0s 0 0 0.00000 0 168 - 0.00000 - - 0s 0 0 0.00000 0 136 - 0.00000 - - 0s 0 0 0.00000 0 129 - 0.00000 - - 0s 0 0 0.00000 0 113 - 0.00000 - - 1s 0 0 0.00000 0 111 - 0.00000 - - 1s 0 0 0.00000 0 118 - 0.00000 - - 1s 0 0 0.00000 0 143 - 0.00000 - - 1s 0 0 0.00000 0 130 - 0.00000 - - 1s 0 0 0.00000 0 123 - 0.00000 - - 1s 0 0 0.00000 0 131 - 0.00000 - - 2s 0 0 0.00000 0 131 - 0.00000 - - 2s 0 2 0.00000 0 131 - 0.00000 - - 2s Cutting planes: Clique: 29 Zero half: 11 Explored 113 nodes (30269 simplex iterations) in 3.01 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: 8 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:00:42 2012 Optimize a model with 3704 rows, 776 columns and 11358 nonzeros Presolve time: 0.01s Presolved: 3704 rows, 776 columns, 11358 nonzeros Variable types: 0 continuous, 776 integer (776 binary) Root relaxation: objective 0.000000e+00, 88 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 34 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Gomory: 1 Clique: 24 MIR: 4 Zero half: 24 Explored 0 nodes (831 simplex iterations) in 0.05 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: 9