current bounds on the number of colors: 0 -- 49 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:11:47 2012 Optimize a model with 14257 rows, 1768 columns and 43800 nonzeros Presolve time: 0.05s Presolved: 14257 rows, 1768 columns, 43800 nonzeros Variable types: 0 continuous, 1768 integer (1768 binary) Root relaxation: objective 0.000000e+00, 104 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 (489 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 -- 24 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:11:47 2012 Optimize a model with 7153 rows, 1180 columns and 21900 nonzeros Presolve time: 0.02s Presolved: 7153 rows, 1180 columns, 21900 nonzeros Variable types: 0 continuous, 1180 integer (1180 binary) Root relaxation: objective 0.000000e+00, 112 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 H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (992 simplex iterations) in 0.08 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 18:11:47 2012 Optimize a model with 3601 rows, 886 columns and 10950 nonzeros Presolve time: 0.01s Presolved: 3601 rows, 886 columns, 10950 nonzeros Variable types: 0 continuous, 886 integer (886 binary) Root relaxation: objective 0.000000e+00, 99 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 76 - 0.00000 - - 0s 0 0 0.00000 0 65 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2659 simplex iterations) in 0.35 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 18:11:47 2012 Optimize a model with 5377 rows, 1033 columns and 16425 nonzeros Presolve time: 0.01s Presolved: 5377 rows, 1033 columns, 16425 nonzeros Variable types: 0 continuous, 1033 integer (1033 binary) Root relaxation: objective 0.000000e+00, 99 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 50 - 0.00000 - - 0s 0 0 0.00000 0 45 - 0.00000 - - 0s 0 0 0.00000 0 130 - 0.00000 - - 0s 0 0 0.00000 0 178 - 0.00000 - - 0s 0 0 0.00000 0 127 - 0.00000 - - 1s 0 0 0.00000 0 98 - 0.00000 - - 1s 0 0 0.00000 0 83 - 0.00000 - - 1s 0 0 0.00000 0 97 - 0.00000 - - 2s 0 0 0.00000 0 22 - 0.00000 - - 2s H 0 0 0.0000000 0.00000 0.0% - 2s Cutting planes: Clique: 21 Zero half: 1 Explored 0 nodes (22128 simplex iterations) in 2.70 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 18:11:50 2012 Optimize a model with 4193 rows, 935 columns and 12775 nonzeros Presolve time: 0.01s Presolved: 4193 rows, 935 columns, 12775 nonzeros Variable types: 0 continuous, 935 integer (935 binary) Root relaxation: objective 0.000000e+00, 98 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 56 - 0.00000 - - 0s 0 0 0.00000 0 42 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2100 simplex iterations) in 0.25 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 18:11:51 2012 Optimize a model with 4785 rows, 984 columns and 14600 nonzeros Presolve time: 0.01s Presolved: 4785 rows, 984 columns, 14600 nonzeros Variable types: 0 continuous, 984 integer (984 binary) Root relaxation: objective 0.000000e+00, 98 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 46 - 0.00000 - - 0s 0 0 0.00000 0 34 - 0.00000 - - 0s 0 0 0.00000 0 184 - 0.00000 - - 0s 0 0 0.00000 0 227 - 0.00000 - - 1s 0 0 0.00000 0 186 - 0.00000 - - 1s 0 0 0.00000 0 192 - 0.00000 - - 2s 0 0 0.00000 0 181 - 0.00000 - - 2s 0 0 0.00000 0 197 - 0.00000 - - 3s 0 0 0.00000 0 188 - 0.00000 - - 3s 0 0 0.00000 0 191 - 0.00000 - - 4s 0 0 0.00000 0 190 - 0.00000 - - 4s 0 2 0.00000 0 190 - 0.00000 - - 4s 3 5 0.00000 3 183 - 0.00000 - 669 5s Cutting planes: Clique: 119 Zero half: 2 Explored 29 nodes (36038 simplex iterations) in 5.52 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