current bounds on the number of colors: 0 -- 148 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:46:03 2012 Optimize a model with 43216 rows, 11534 columns and 140156 nonzeros Presolve removed 1 rows and 74 columns Presolve time: 0.15s Presolved: 43215 rows, 11460 columns, 140082 nonzeros Variable types: 0 continuous, 11460 integer (11460 binary) Root relaxation: objective 0.000000e+00, 470 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 (760 simplex iterations) in 0.24 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 -- 74 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:46:03 2012 Optimize a model with 21682 rows, 6058 columns and 70078 nonzeros Presolve removed 1 rows and 37 columns Presolve time: 0.11s Presolved: 21681 rows, 6021 columns, 70041 nonzeros Variable types: 0 continuous, 6021 integer (6021 binary) Root relaxation: objective 0.000000e+00, 356 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 (625 simplex iterations) in 0.16 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 -- 37 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:46:04 2012 Optimize a model with 10624 rows, 3246 columns and 34092 nonzeros Presolve removed 1 rows and 18 columns Presolve time: 0.04s Presolved: 10623 rows, 3228 columns, 34074 nonzeros Variable types: 0 continuous, 3228 integer (3228 binary) Root relaxation: objective 0.000000e+00, 303 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 (562 simplex iterations) in 0.06 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 -- 18 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:46:04 2012 Optimize a model with 5386 rows, 1914 columns and 17046 nonzeros Presolve removed 1 rows and 9 columns Presolve time: 0.02s Presolved: 5385 rows, 1905 columns, 17037 nonzeros Variable types: 0 continuous, 1905 integer (1905 binary) Root relaxation: objective 0.000000e+00, 332 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 (793 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 -- 9 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:46:04 2012 Optimize a model with 2476 rows, 1174 columns and 7576 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.01s Presolved: 2475 rows, 1170 columns, 7572 nonzeros Variable types: 0 continuous, 1170 integer (1170 binary) Root relaxation: objective 0.000000e+00, 324 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 0 278 - 0.00000 - - 0s 0 0 0.00000 0 272 - 0.00000 - - 0s 0 0 0.00000 0 254 - 0.00000 - - 0s 0 0 0.00000 0 305 - 0.00000 - - 0s 0 0 0.00000 0 256 - 0.00000 - - 0s 0 0 0.00000 0 206 - 0.00000 - - 0s 0 0 0.00000 0 200 - 0.00000 - - 0s 0 0 0.00000 0 206 - 0.00000 - - 0s 0 0 0.00000 0 206 - 0.00000 - - 1s 0 0 0.00000 0 200 - 0.00000 - - 1s 0 0 0.00000 0 194 - 0.00000 - - 1s 0 0 0.00000 0 185 - 0.00000 - - 1s 0 0 0.00000 0 189 - 0.00000 - - 1s 0 0 0.00000 0 142 - 0.00000 - - 1s 0 0 0.00000 0 144 - 0.00000 - - 2s 0 0 0.00000 0 144 - 0.00000 - - 2s 0 2 0.00000 0 144 - 0.00000 - - 2s 605 72 0.00000 23 297 - 0.00000 - 71.2 5s 647 90 0.00000 19 208 - 0.00000 - 106 10s * 674 54 30 0.0000000 0.00000 0.0% 108 10s Cutting planes: Gomory: 2 Zero half: 4 Explored 675 nodes (103286 simplex iterations) in 10.23 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:46:14 2012 Optimize a model with 1312 rows, 878 columns and 3788 nonzeros Presolve removed 148 rows and 149 columns Presolve time: 0.00s Presolved: 1164 rows, 729 columns, 3492 nonzeros Variable types: 0 continuous, 729 integer (729 binary) Root relaxation: objective 0.000000e+00, 159 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 0 147 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (650 simplex iterations) in 0.01 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: 2 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:46:14 2012 Optimize a model with 1894 rows, 1026 columns and 5682 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 1893 rows, 1023 columns, 5679 nonzeros Variable types: 0 continuous, 1023 integer (1023 binary) Root relaxation: objective 0.000000e+00, 345 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 0 288 - 0.00000 - - 0s 0 0 0.00000 0 292 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3255 simplex iterations) in 0.30 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - optimal solution found: number of colors: 4