current bounds on the number of colors: 0 -- 46 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:06:18 2012 Optimize a model with 12213 rows, 1587 columns and 37559 nonzeros Presolve time: 0.05s Presolved: 12213 rows, 1587 columns, 37559 nonzeros Variable types: 0 continuous, 1587 integer (1587 binary) Root relaxation: objective 0.000000e+00, 97 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 (422 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 -- 23 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:06:18 2012 Optimize a model with 5865 rows, 1035 columns and 17963 nonzeros Presolve time: 0.02s Presolved: 5865 rows, 1035 columns, 17963 nonzeros Variable types: 0 continuous, 1035 integer (1035 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 0.00000 0 32 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1327 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 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:06:18 2012 Optimize a model with 2691 rows, 759 columns and 8165 nonzeros Presolve time: 0.01s Presolved: 2691 rows, 759 columns, 8165 nonzeros Variable types: 0 continuous, 759 integer (759 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 60 - 0.00000 - - 0s 0 0 0.00000 0 58 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2225 simplex iterations) in 0.22 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 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:06:19 2012 Optimize a model with 4278 rows, 897 columns and 13064 nonzeros Presolve time: 0.01s Presolved: 4278 rows, 897 columns, 13064 nonzeros Variable types: 0 continuous, 897 integer (897 binary) Root relaxation: objective 0.000000e+00, 93 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 40 - 0.00000 - - 0s 0 0 0.00000 0 60 - 0.00000 - - 0s 0 0 0.00000 0 181 - 0.00000 - - 0s 0 0 0.00000 0 203 - 0.00000 - - 0s 0 0 0.00000 0 191 - 0.00000 - - 1s 0 0 0.00000 0 165 - 0.00000 - - 1s 0 0 0.00000 0 160 - 0.00000 - - 2s 0 0 0.00000 0 166 - 0.00000 - - 2s 0 0 0.00000 0 190 - 0.00000 - - 3s 0 0 0.00000 0 218 - 0.00000 - - 3s 0 0 0.00000 0 155 - 0.00000 - - 3s 0 2 0.00000 0 155 - 0.00000 - - 4s Cutting planes: Clique: 65 Zero half: 11 Explored 21 nodes (32211 simplex iterations) in 4.70 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 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:06:23 2012 Optimize a model with 4807 rows, 943 columns and 14697 nonzeros Presolve time: 0.01s Presolved: 4807 rows, 943 columns, 14697 nonzeros Variable types: 0 continuous, 943 integer (943 binary) Root relaxation: objective 0.000000e+00, 104 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 33 - 0.00000 - - 0s 0 0 0.00000 0 70 - 0.00000 - - 0s 0 0 0.00000 0 145 - 0.00000 - - 0s 0 0 0.00000 0 50 - 0.00000 - - 0s 0 0 0.00000 0 72 - 0.00000 - - 1s 0 0 0.00000 0 54 - 0.00000 - - 1s 0 0 0.00000 0 52 - 0.00000 - - 1s 0 0 0.00000 0 57 - 0.00000 - - 1s 0 0 0.00000 0 35 - 0.00000 - - 2s 0 0 0.00000 0 49 - 0.00000 - - 2s 0 0 0.00000 0 55 - 0.00000 - - 2s 0 0 0.00000 0 55 - 0.00000 - - 2s 0 2 0.00000 0 55 - 0.00000 - - 2s * 295 0 15 0.0000000 0.00000 0.0% 54.4 4s Cutting planes: Clique: 31 Zero half: 5 Explored 296 nodes (39329 simplex iterations) in 4.69 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