current bounds on the number of colors: 0 -- 152 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:50:00 2012 Optimize a model with 43928 rows, 12128 columns and 142880 nonzeros Presolve time: 0.16s Presolved: 43928 rows, 12128 columns, 142880 nonzeros Variable types: 0 continuous, 12128 integer (12128 binary) Root relaxation: objective 0.000000e+00, 553 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 (871 simplex iterations) in 0.25 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 -- 76 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:50:00 2012 Optimize a model with 22040 rows, 6352 columns and 71440 nonzeros Presolve time: 0.12s Presolved: 22040 rows, 6352 columns, 71440 nonzeros Variable types: 0 continuous, 6352 integer (6352 binary) Root relaxation: objective 0.000000e+00, 512 iterations, 0.02 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 (825 simplex iterations) in 0.17 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 -- 38 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:50:01 2012 Optimize a model with 11096 rows, 3464 columns and 35720 nonzeros Presolve time: 0.04s Presolved: 11096 rows, 3464 columns, 35720 nonzeros Variable types: 0 continuous, 3464 integer (3464 binary) Root relaxation: objective 0.000000e+00, 321 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 (588 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 -- 19 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:50:01 2012 Optimize a model with 5336 rows, 1944 columns and 16920 nonzeros Presolve time: 0.02s Presolved: 5336 rows, 1944 columns, 16920 nonzeros Variable types: 0 continuous, 1944 integer (1944 binary) Root relaxation: objective 0.000000e+00, 337 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 (611 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 -- 9 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:50:01 2012 Optimize a model with 2456 rows, 1184 columns and 7520 nonzeros Presolve time: 0.01s Presolved: 2456 rows, 1184 columns, 7520 nonzeros Variable types: 0 continuous, 1184 integer (1184 binary) Root relaxation: objective 0.000000e+00, 346 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 0 168 - 0.00000 - - 0s 0 0 0.00000 0 172 - 0.00000 - - 0s 0 0 0.00000 0 292 - 0.00000 - - 0s 0 0 0.00000 0 293 - 0.00000 - - 0s 0 0 0.00000 0 280 - 0.00000 - - 0s 0 0 0.00000 0 270 - 0.00000 - - 0s 0 0 0.00000 0 256 - 0.00000 - - 0s 0 0 0.00000 0 240 - 0.00000 - - 0s 0 0 0.00000 0 244 - 0.00000 - - 0s 0 0 0.00000 0 204 - 0.00000 - - 1s 0 0 0.00000 0 202 - 0.00000 - - 1s 0 0 0.00000 0 196 - 0.00000 - - 1s 0 0 0.00000 0 200 - 0.00000 - - 1s 0 0 0.00000 0 204 - 0.00000 - - 1s 0 0 0.00000 0 196 - 0.00000 - - 1s 0 0 0.00000 0 202 - 0.00000 - - 1s 0 0 0.00000 0 190 - 0.00000 - - 1s Cutting planes: Zero half: 4 Explored 0 nodes (28668 simplex iterations) in 2.00 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 18:50:03 2012 Optimize a model with 1304 rows, 880 columns and 3760 nonzeros Presolve removed 152 rows and 152 columns Presolve time: 0.00s Presolved: 1152 rows, 728 columns, 3456 nonzeros Variable types: 0 continuous, 728 integer (728 binary) Root relaxation: objective 0.000000e+00, 161 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 0 152 - 0.00000 - - 0s Explored 0 nodes (648 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 18:50:03 2012 Optimize a model with 1880 rows, 1032 columns and 5640 nonzeros Presolve time: 0.00s Presolved: 1880 rows, 1032 columns, 5640 nonzeros Variable types: 0 continuous, 1032 integer (1032 binary) Root relaxation: objective 0.000000e+00, 369 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 0 300 - 0.00000 - - 0s 0 0 0.00000 0 284 - 0.00000 - - 0s 0 0 0.00000 0 298 - 0.00000 - - 0s 0 0 0.00000 0 406 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 2 Zero half: 259 Explored 0 nodes (6273 simplex iterations) in 0.54 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