current bounds on the number of colors: 0 -- 48 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:09:39 2012 Optimize a model with 13680 rows, 1720 columns and 42048 nonzeros Presolve time: 0.05s Presolved: 13680 rows, 1720 columns, 42048 nonzeros Variable types: 0 continuous, 1720 integer (1720 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (361 simplex iterations) in 0.10 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 18:09:39 2012 Optimize a model with 6864 rows, 1144 columns and 21024 nonzeros Presolve time: 0.02s Presolved: 6864 rows, 1144 columns, 21024 nonzeros Variable types: 0 continuous, 1144 integer (1144 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 12 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (879 simplex iterations) in 0.07 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 18:09:39 2012 Optimize a model with 3456 rows, 856 columns and 10512 nonzeros Presolve time: 0.01s Presolved: 3456 rows, 856 columns, 10512 nonzeros Variable types: 0 continuous, 856 integer (856 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 50 - 0.00000 - - 0s 0 0 0.00000 0 46 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2168 simplex iterations) in 0.23 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 18:09:39 2012 Optimize a model with 5160 rows, 1000 columns and 15768 nonzeros Presolve time: 0.01s Presolved: 5160 rows, 1000 columns, 15768 nonzeros Variable types: 0 continuous, 1000 integer (1000 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 48 - 0.00000 - - 0s 0 0 0.00000 0 29 - 0.00000 - - 0s 0 0 0.00000 0 51 - 0.00000 - - 0s 0 0 0.00000 0 156 - 0.00000 - - 0s 0 0 0.00000 0 20 - 0.00000 - - 0s 0 0 0.00000 0 15 - 0.00000 - - 1s 0 0 0.00000 0 38 - 0.00000 - - 1s H 0 0 0.0000000 0.00000 0.0% - 1s Cutting planes: Clique: 1 Explored 0 nodes (13151 simplex iterations) in 1.40 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 18:09:41 2012 Optimize a model with 4024 rows, 904 columns and 12264 nonzeros Presolve time: 0.01s Presolved: 4024 rows, 904 columns, 12264 nonzeros Variable types: 0 continuous, 904 integer (904 binary) Root relaxation: objective 0.000000e+00, 97 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 38 - 0.00000 - - 0s 0 0 0.00000 0 251 - 0.00000 - - 0s 0 0 0.00000 0 281 - 0.00000 - - 0s 0 0 0.00000 0 270 - 0.00000 - - 1s 0 0 0.00000 0 253 - 0.00000 - - 2s 0 0 0.00000 0 258 - 0.00000 - - 2s 0 0 0.00000 0 250 - 0.00000 - - 3s 0 0 0.00000 0 267 - 0.00000 - - 3s 0 0 0.00000 0 266 - 0.00000 - - 4s 0 2 0.00000 0 251 - 0.00000 - - 4s Cutting planes: Clique: 113 Zero half: 33 Explored 5 nodes (26813 simplex iterations) in 4.81 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 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:09:46 2012 Optimize a model with 4592 rows, 952 columns and 14016 nonzeros Presolve time: 0.01s Presolved: 4592 rows, 952 columns, 14016 nonzeros Variable types: 0 continuous, 952 integer (952 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 54 - 0.00000 - - 0s 0 0 0.00000 0 51 - 0.00000 - - 0s 0 0 0.00000 0 150 - 0.00000 - - 0s 0 0 0.00000 0 196 - 0.00000 - - 0s 0 0 0.00000 0 152 - 0.00000 - - 1s 0 0 0.00000 0 222 - 0.00000 - - 1s 0 0 0.00000 0 171 - 0.00000 - - 2s 0 0 0.00000 0 174 - 0.00000 - - 2s 0 0 0.00000 0 174 - 0.00000 - - 2s 0 2 0.00000 0 174 - 0.00000 - - 3s Cutting planes: Clique: 89 Zero half: 2 Explored 39 nodes (28883 simplex iterations) in 4.04 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