current bounds on the number of colors: 0 -- 177 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 23:35:03 2012 Optimize a model with 68465 rows, 16352 columns and 220440 nonzeros Presolve time: 0.21s Presolved: 68465 rows, 16352 columns, 220440 nonzeros Variable types: 0 continuous, 16352 integer (16352 binary) Root relaxation: objective 0.000000e+00, 587 iterations, 0.05 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 (988 simplex iterations) in 0.36 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 -- 88 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 23:35:05 2012 Optimize a model with 34321 rows, 8564 columns and 110220 nonzeros Presolve time: 0.15s Presolved: 34321 rows, 8564 columns, 110220 nonzeros Variable types: 0 continuous, 8564 integer (8564 binary) Root relaxation: objective 0.000000e+00, 431 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 (747 simplex iterations) in 0.21 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 -- 44 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 23:35:05 2012 Optimize a model with 17249 rows, 4670 columns and 55110 nonzeros Presolve time: 0.07s Presolved: 17249 rows, 4670 columns, 55110 nonzeros Variable types: 0 continuous, 4670 integer (4670 binary) Root relaxation: objective 0.000000e+00, 361 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 (656 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 -- 22 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 23:35:05 2012 Optimize a model with 8713 rows, 2723 columns and 27555 nonzeros Presolve time: 0.03s Presolved: 8713 rows, 2723 columns, 27555 nonzeros Variable types: 0 continuous, 2723 integer (2723 binary) Root relaxation: objective 0.000000e+00, 379 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 (700 simplex iterations) in 0.05 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 Fri Dec 14 23:35:06 2012 Optimize a model with 4057 rows, 1661 columns and 12525 nonzeros Presolve time: 0.01s Presolved: 4057 rows, 1661 columns, 12525 nonzeros Variable types: 0 continuous, 1661 integer (1661 binary) Root relaxation: objective 0.000000e+00, 424 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 82 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (3594 simplex iterations) in 0.19 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 23:35:06 2012 Optimize a model with 1729 rows, 1130 columns and 5010 nonzeros Presolve removed 177 rows and 177 columns Presolve time: 0.00s Presolved: 1552 rows, 953 columns, 4656 nonzeros Variable types: 0 continuous, 953 integer (953 binary) Root relaxation: objective 0.000000e+00, 188 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 0 177 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (781 simplex iterations) in 0.02 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 23:35:06 2012 Optimize a model with 2505 rows, 1307 columns and 7515 nonzeros Presolve time: 0.01s Presolved: 2505 rows, 1307 columns, 7515 nonzeros Variable types: 0 continuous, 1307 integer (1307 binary) Root relaxation: objective 0.000000e+00, 398 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 0 344 - 0.00000 - - 0s 0 0 0.00000 0 350 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (4713 simplex iterations) in 0.49 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 23:35:07 2012 Optimize a model with 3281 rows, 1484 columns and 10020 nonzeros Presolve time: 0.01s Presolved: 3281 rows, 1484 columns, 10020 nonzeros Variable types: 0 continuous, 1484 integer (1484 binary) Root relaxation: objective 0.000000e+00, 393 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 0 334 - 0.00000 - - 0s 0 0 0.00000 0 330 - 0.00000 - - 0s 0 0 0.00000 0 332 - 0.00000 - - 0s 0 0 0.00000 0 347 - 0.00000 - - 0s 0 0 0.00000 0 340 - 0.00000 - - 0s 0 0 0.00000 0 338 - 0.00000 - - 1s 0 0 0.00000 0 340 - 0.00000 - - 1s 0 0 0.00000 0 340 - 0.00000 - - 1s 0 0 0.00000 0 332 - 0.00000 - - 1s 0 0 0.00000 0 338 - 0.00000 - - 2s 0 0 0.00000 0 338 - 0.00000 - - 2s 0 2 0.00000 0 338 - 0.00000 - - 2s 479 25 0.00000 16 299 - 0.00000 - 100 5s 808 44 0.00000 17 266 - 0.00000 - 97.4 10s 813 47 0.00000 18 345 - 0.00000 - 96.8 15s 863 54 infeasible 27 - 0.00000 - 157 20s 1289 15 0.00000 24 304 - 0.00000 - 172 25s 1708 20 infeasible 26 - 0.00000 - 181 30s 2158 32 infeasible 29 - 0.00000 - 182 35s 2590 36 infeasible 27 - 0.00000 - 184 40s 3012 40 infeasible 28 - 0.00000 - 186 45s 3388 24 infeasible 31 - 0.00000 - 189 50s 3778 4 infeasible 31 - 0.00000 - 192 55s Cutting planes: Zero half: 12 Explored 3789 nodes (752271 simplex iterations) in 55.16 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 5