current bounds on the number of colors: 0 -- 102 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:53:17 2012 Optimize a model with 26928 rows, 5728 columns and 85680 nonzeros Presolve time: 0.14s Presolved: 26928 rows, 5728 columns, 85680 nonzeros Variable types: 0 continuous, 5728 integer (5728 binary) Root relaxation: objective 0.000000e+00, 375 iterations, 0.03 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 (633 simplex iterations) in 0.20 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 -- 51 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:53:17 2012 Optimize a model with 13252 rows, 3076 columns and 42000 nonzeros Presolve time: 0.05s Presolved: 13252 rows, 3076 columns, 42000 nonzeros Variable types: 0 continuous, 3076 integer (3076 binary) Root relaxation: objective 0.000000e+00, 257 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 (459 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 -- 25 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:53:18 2012 Optimize a model with 6414 rows, 1750 columns and 20160 nonzeros Presolve time: 0.02s Presolved: 6414 rows, 1750 columns, 20160 nonzeros Variable types: 0 continuous, 1750 integer (1750 binary) Root relaxation: objective 0.000000e+00, 210 iterations, 0.00 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 (389 simplex iterations) in 0.03 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 19:53:18 2012 Optimize a model with 3258 rows, 1138 columns and 10080 nonzeros Presolve time: 0.01s Presolved: 3258 rows, 1138 columns, 10080 nonzeros Variable types: 0 continuous, 1138 integer (1138 binary) Root relaxation: objective 0.000000e+00, 224 iterations, 0.00 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 (728 simplex iterations) in 0.03 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 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:53:18 2012 Optimize a model with 1680 rows, 832 columns and 5040 nonzeros Presolve time: 0.00s Presolved: 1680 rows, 832 columns, 5040 nonzeros Variable types: 0 continuous, 832 integer (832 binary) Root relaxation: objective 0.000000e+00, 213 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 0 204 - 0.00000 - - 0s 0 0 0.00000 0 176 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3015 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: 3 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:53:18 2012 Optimize a model with 2206 rows, 934 columns and 6720 nonzeros Presolve time: 0.01s Presolved: 2206 rows, 934 columns, 6720 nonzeros Variable types: 0 continuous, 934 integer (934 binary) Root relaxation: objective 0.000000e+00, 231 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 0 136 - 0.00000 - - 0s 0 0 0.00000 0 158 - 0.00000 - - 0s 0 0 0.00000 0 285 - 0.00000 - - 0s 0 0 0.00000 0 292 - 0.00000 - - 0s 0 0 0.00000 0 261 - 0.00000 - - 0s 0 0 0.00000 0 270 - 0.00000 - - 1s 0 0 0.00000 0 207 - 0.00000 - - 1s 0 0 0.00000 0 277 - 0.00000 - - 1s 0 0 0.00000 0 257 - 0.00000 - - 1s 0 0 0.00000 0 260 - 0.00000 - - 2s 0 0 0.00000 0 260 - 0.00000 - - 2s 0 2 0.00000 0 260 - 0.00000 - - 2s Cutting planes: Clique: 16 Zero half: 41 Explored 155 nodes (38626 simplex iterations) in 3.74 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: 4 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:53:22 2012 Optimize a model with 2732 rows, 1036 columns and 8400 nonzeros Presolve time: 0.01s Presolved: 2732 rows, 1036 columns, 8400 nonzeros Variable types: 0 continuous, 1036 integer (1036 binary) Root relaxation: objective 0.000000e+00, 227 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 0 192 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1068 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% optimal solution found: number of colors: 5