current bounds on the number of colors: 0 -- 172 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:50:05 2012 Optimize a model with 63296 rows, 15526 columns and 204164 nonzeros Presolve time: 0.19s Presolved: 63296 rows, 15526 columns, 204164 nonzeros Variable types: 0 continuous, 15526 integer (15526 binary) Root relaxation: objective 0.000000e+00, 691 iterations, 0.07 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 (1119 simplex iterations) in 0.37 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 -- 86 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:50:06 2012 Optimize a model with 31734 rows, 8130 columns and 102082 nonzeros Presolve time: 0.14s Presolved: 31734 rows, 8130 columns, 102082 nonzeros Variable types: 0 continuous, 8130 integer (8130 binary) Root relaxation: objective 0.000000e+00, 507 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 (875 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 -- 43 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:50:06 2012 Optimize a model with 15586 rows, 4346 columns and 49854 nonzeros Presolve time: 0.06s Presolved: 15586 rows, 4346 columns, 49854 nonzeros Variable types: 0 continuous, 4346 integer (4346 binary) Root relaxation: objective 0.000000e+00, 403 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 (895 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 -- 21 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:50:07 2012 Optimize a model with 7512 rows, 2454 columns and 23740 nonzeros Presolve time: 0.02s Presolved: 7512 rows, 2454 columns, 23740 nonzeros Variable types: 0 continuous, 2454 integer (2454 binary) Root relaxation: objective 0.000000e+00, 363 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 (661 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 -- 10 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:50:07 2012 Optimize a model with 3842 rows, 1594 columns and 11870 nonzeros Presolve time: 0.01s Presolved: 3842 rows, 1594 columns, 11870 nonzeros Variable types: 0 continuous, 1594 integer (1594 binary) Root relaxation: objective 0.000000e+00, 383 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 0 132 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (2219 simplex iterations) in 0.09 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 21:50:07 2012 Optimize a model with 1640 rows, 1078 columns and 4748 nonzeros Presolve removed 172 rows and 172 columns Presolve time: 0.00s Presolved: 1468 rows, 906 columns, 4404 nonzeros Variable types: 0 continuous, 906 integer (906 binary) Root relaxation: objective 0.000000e+00, 178 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 0 172 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (752 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 21:50:07 2012 Optimize a model with 2374 rows, 1250 columns and 7122 nonzeros Presolve time: 0.01s Presolved: 2374 rows, 1250 columns, 7122 nonzeros Variable types: 0 continuous, 1250 integer (1250 binary) Root relaxation: objective 0.000000e+00, 376 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 0 340 - 0.00000 - - 0s 0 0 0.00000 0 340 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3843 simplex iterations) in 0.40 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 21:50:08 2012 Optimize a model with 3108 rows, 1422 columns and 9496 nonzeros Presolve time: 0.01s Presolved: 3108 rows, 1422 columns, 9496 nonzeros Variable types: 0 continuous, 1422 integer (1422 binary) Root relaxation: objective 0.000000e+00, 397 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 0 282 - 0.00000 - - 0s 0 0 0.00000 0 184 - 0.00000 - - 0s 0 0 0.00000 0 316 - 0.00000 - - 0s 0 0 0.00000 0 333 - 0.00000 - - 0s 0 0 0.00000 0 294 - 0.00000 - - 1s 0 0 0.00000 0 290 - 0.00000 - - 1s 0 0 0.00000 0 266 - 0.00000 - - 1s 0 0 0.00000 0 270 - 0.00000 - - 1s 0 0 0.00000 0 262 - 0.00000 - - 2s 0 0 0.00000 0 248 - 0.00000 - - 2s 0 0 0.00000 0 379 - 0.00000 - - 2s 0 0 0.00000 0 390 - 0.00000 - - 3s 0 0 0.00000 0 390 - 0.00000 - - 3s 0 2 0.00000 0 390 - 0.00000 - - 3s 285 33 0.00000 18 260 - 0.00000 - 87.3 5s 615 62 0.00000 17 252 - 0.00000 - 86.4 10s 620 66 0.00000 12 393 - 0.00000 - 85.7 15s 627 70 0.00000 10 349 - 0.00000 - 84.7 20s 1076 49 0.00000 29 286 - 0.00000 - 170 25s 1653 82 infeasible 34 - 0.00000 - 167 30s 2237 88 0.00000 29 266 - 0.00000 - 164 35s 2851 128 0.00000 33 264 - 0.00000 - 163 40s * 3175 5 32 0.0000000 0.00000 0.0% 163 42s Cutting planes: Zero half: 13 Explored 3176 nodes (552848 simplex iterations) in 42.80 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: 4