current bounds on the number of colors: 0 -- 106 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:58:27 2012 Optimize a model with 32754 rows, 6234 columns and 103562 nonzeros Presolve time: 0.15s Presolved: 32754 rows, 6234 columns, 103562 nonzeros Variable types: 0 continuous, 6234 integer (6234 binary) Root relaxation: objective 0.000000e+00, 272 iterations, 0.04 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 (520 simplex iterations) in 0.23 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 -- 53 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:58:27 2012 Optimize a model with 16122 rows, 3372 columns and 50804 nonzeros Presolve time: 0.07s Presolved: 16122 rows, 3372 columns, 50804 nonzeros Variable types: 0 continuous, 3372 integer (3372 binary) Root relaxation: objective 0.000000e+00, 242 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 (454 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 -- 26 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:58:28 2012 Optimize a model with 8114 rows, 1994 columns and 25402 nonzeros Presolve time: 0.03s Presolved: 8114 rows, 1994 columns, 25402 nonzeros Variable types: 0 continuous, 1994 integer (1994 binary) Root relaxation: objective 0.000000e+00, 225 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 (419 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% current bounds on the number of colors: 0 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:58:28 2012 Optimize a model with 3802 rows, 1252 columns and 11724 nonzeros Presolve time: 0.01s Presolved: 3802 rows, 1252 columns, 11724 nonzeros Variable types: 0 continuous, 1252 integer (1252 binary) Root relaxation: objective 0.000000e+00, 234 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 (650 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 19:58:28 2012 Optimize a model with 1954 rows, 934 columns and 5862 nonzeros Presolve time: 0.00s Presolved: 1954 rows, 934 columns, 5862 nonzeros Variable types: 0 continuous, 934 integer (934 binary) Root relaxation: objective 0.000000e+00, 220 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 0 170 - 0.00000 - - 0s 0 0 0.00000 0 212 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3065 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 19:58:28 2012 Optimize a model with 2570 rows, 1040 columns and 7816 nonzeros Presolve time: 0.01s Presolved: 2570 rows, 1040 columns, 7816 nonzeros Variable types: 0 continuous, 1040 integer (1040 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 0 128 - 0.00000 - - 0s 0 0 0.00000 0 200 - 0.00000 - - 0s 0 0 0.00000 0 210 - 0.00000 - - 0s 0 0 0.00000 0 326 - 0.00000 - - 0s 0 0 0.00000 0 318 - 0.00000 - - 1s 0 0 0.00000 0 302 - 0.00000 - - 1s 0 0 0.00000 0 301 - 0.00000 - - 1s 0 0 0.00000 0 307 - 0.00000 - - 2s 0 0 0.00000 0 301 - 0.00000 - - 3s 0 0 0.00000 0 297 - 0.00000 - - 3s 0 0 0.00000 0 296 - 0.00000 - - 3s 0 0 0.00000 0 300 - 0.00000 - - 4s 0 0 0.00000 0 298 - 0.00000 - - 4s 0 0 0.00000 0 293 - 0.00000 - - 4s 0 0 0.00000 0 300 - 0.00000 - - 5s 0 0 0.00000 0 300 - 0.00000 - - 5s 0 2 0.00000 0 300 - 0.00000 - - 5s Cutting planes: Clique: 23 Zero half: 24 Explored 17 nodes (39767 simplex iterations) in 5.99 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 19:58:34 2012 Optimize a model with 3186 rows, 1146 columns and 9770 nonzeros Presolve time: 0.01s Presolved: 3186 rows, 1146 columns, 9770 nonzeros Variable types: 0 continuous, 1146 integer (1146 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 0 200 - 0.00000 - - 0s 0 0 0.00000 0 169 - 0.00000 - - 0s 0 0 0.00000 0 205 - 0.00000 - - 0s 0 0 0.00000 0 157 - 0.00000 - - 0s 0 0 0.00000 0 238 - 0.00000 - - 0s 0 0 0.00000 0 208 - 0.00000 - - 1s 0 0 0.00000 0 219 - 0.00000 - - 1s 0 0 0.00000 0 193 - 0.00000 - - 1s 0 0 0.00000 0 256 - 0.00000 - - 1s 0 0 0.00000 0 239 - 0.00000 - - 2s 0 2 0.00000 0 239 - 0.00000 - - 2s 606 50 0.00000 16 185 - 0.00000 - 44.7 5s 612 54 0.00000 17 196 - 0.00000 - 44.3 10s 829 56 infeasible 34 - 0.00000 - 103 15s * 1062 4 33 0.0000000 0.00000 0.0% 110 16s Cutting planes: Clique: 1 Zero half: 18 Explored 1063 nodes (139307 simplex iterations) in 16.72 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