current bounds on the number of colors: 0 -- 50 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:13:29 2012 Optimize a model with 14725 rows, 1837 columns and 45275 nonzeros Presolve time: 0.06s Presolved: 14725 rows, 1837 columns, 45275 nonzeros Variable types: 0 continuous, 1837 integer (1837 binary) Root relaxation: objective 0.000000e+00, 128 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 (476 simplex iterations) in 0.11 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 -- 25 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:13:29 2012 Optimize a model with 7094 rows, 1187 columns and 21732 nonzeros Presolve time: 0.02s Presolved: 7094 rows, 1187 columns, 21732 nonzeros Variable types: 0 continuous, 1187 integer (1187 binary) Root relaxation: objective 0.000000e+00, 106 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 (748 simplex iterations) in 0.06 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 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:13:29 2012 Optimize a model with 3572 rows, 887 columns and 10866 nonzeros Presolve time: 0.01s Presolved: 3572 rows, 887 columns, 10866 nonzeros Variable types: 0 continuous, 887 integer (887 binary) Root relaxation: objective 0.000000e+00, 101 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 70 - 0.00000 - - 0s 0 0 0.00000 0 48 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2414 simplex iterations) in 0.30 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 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:13:30 2012 Optimize a model with 5333 rows, 1037 columns and 16299 nonzeros Presolve time: 0.01s Presolved: 5333 rows, 1037 columns, 16299 nonzeros Variable types: 0 continuous, 1037 integer (1037 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 38 - 0.00000 - - 0s 0 0 0.00000 0 49 - 0.00000 - - 0s 0 0 0.00000 0 123 - 0.00000 - - 0s 0 0 0.00000 0 122 - 0.00000 - - 0s 0 0 0.00000 0 152 - 0.00000 - - 0s 0 0 0.00000 0 85 - 0.00000 - - 1s 0 0 0.00000 0 79 - 0.00000 - - 1s 0 0 0.00000 0 62 - 0.00000 - - 1s 0 0 0.00000 0 92 - 0.00000 - - 2s 0 0 0.00000 0 34 - 0.00000 - - 2s 0 0 0.00000 0 141 - 0.00000 - - 2s 0 0 0.00000 0 75 - 0.00000 - - 3s 0 0 0.00000 0 54 - 0.00000 - - 3s 0 0 0.00000 0 59 - 0.00000 - - 3s 0 0 0.00000 0 154 - 0.00000 - - 3s 0 0 0.00000 0 154 - 0.00000 - - 4s 0 2 0.00000 0 154 - 0.00000 - - 5s H 8 1 0.0000000 0.00000 0.0% 267 6s Cutting planes: Clique: 33 Zero half: 1 Explored 8 nodes (37722 simplex iterations) in 6.06 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: 6 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:13:36 2012 Optimize a model with 4159 rows, 937 columns and 12677 nonzeros Presolve time: 0.01s Presolved: 4159 rows, 937 columns, 12677 nonzeros Variable types: 0 continuous, 937 integer (937 binary) Root relaxation: objective 0.000000e+00, 100 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 58 - 0.00000 - - 0s 0 0 0.00000 0 42 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3009 simplex iterations) in 0.33 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: 7 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:13:36 2012 Optimize a model with 4746 rows, 987 columns and 14488 nonzeros Presolve time: 0.01s Presolved: 4746 rows, 987 columns, 14488 nonzeros Variable types: 0 continuous, 987 integer (987 binary) Root relaxation: objective 0.000000e+00, 101 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 44 - 0.00000 - - 0s 0 0 0.00000 0 38 - 0.00000 - - 0s 0 0 0.00000 0 139 - 0.00000 - - 0s 0 0 0.00000 0 235 - 0.00000 - - 0s 0 0 0.00000 0 201 - 0.00000 - - 1s 0 0 0.00000 0 187 - 0.00000 - - 2s 0 0 0.00000 0 167 - 0.00000 - - 2s 0 0 0.00000 0 156 - 0.00000 - - 3s 0 0 0.00000 0 178 - 0.00000 - - 3s 0 0 0.00000 0 171 - 0.00000 - - 4s 0 0 0.00000 0 162 - 0.00000 - - 4s 0 0 0.00000 0 206 - 0.00000 - - 5s 0 0 0.00000 0 175 - 0.00000 - - 5s 0 2 0.00000 0 157 - 0.00000 - - 6s Cutting planes: Clique: 92 Zero half: 13 Explored 23 nodes (43965 simplex iterations) in 6.88 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 9