current bounds on the number of colors: 0 -- 149 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:46:21 2012 Optimize a model with 44327 rows, 11623 columns and 143560 nonzeros Presolve time: 0.15s Presolved: 44327 rows, 11623 columns, 143560 nonzeros Variable types: 0 continuous, 11623 integer (11623 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 (994 simplex iterations) in 0.28 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 18:46:22 2012 Optimize a model with 22238 rows, 6110 columns and 71780 nonzeros Presolve time: 0.11s Presolved: 22238 rows, 6110 columns, 71780 nonzeros Variable types: 0 continuous, 6110 integer (6110 binary) Root relaxation: objective 0.000000e+00, 380 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 (653 simplex iterations) in 0.15 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 18:46:23 2012 Optimize a model with 10895 rows, 3279 columns and 34920 nonzeros Presolve time: 0.04s Presolved: 10895 rows, 3279 columns, 34920 nonzeros Variable types: 0 continuous, 3279 integer (3279 binary) Root relaxation: objective 0.000000e+00, 298 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 (568 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 18:46:23 2012 Optimize a model with 5522 rows, 1938 columns and 17460 nonzeros Presolve time: 0.02s Presolved: 5522 rows, 1938 columns, 17460 nonzeros Variable types: 0 continuous, 1938 integer (1938 binary) Root relaxation: objective 0.000000e+00, 325 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 (610 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 18:46:23 2012 Optimize a model with 2537 rows, 1193 columns and 7760 nonzeros Presolve time: 0.01s Presolved: 2537 rows, 1193 columns, 7760 nonzeros Variable types: 0 continuous, 1193 integer (1193 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 0.00000 0 286 - 0.00000 - - 0s 0 0 0.00000 0 246 - 0.00000 - - 0s 0 0 0.00000 0 259 - 0.00000 - - 0s 0 0 0.00000 0 321 - 0.00000 - - 0s 0 0 0.00000 0 285 - 0.00000 - - 0s 0 0 0.00000 0 309 - 0.00000 - - 1s 0 0 0.00000 0 345 - 0.00000 - - 1s 0 0 0.00000 0 345 - 0.00000 - - 1s 0 2 0.00000 0 345 - 0.00000 - - 1s 606 236 0.00000 24 296 - 0.00000 - 79.7 6s * 786 171 26 0.0000000 0.00000 0.0% 105 9s Cutting planes: Gomory: 2 Clique: 2 Zero half: 5 Explored 787 nodes (97630 simplex iterations) in 9.39 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 18:46:32 2012 Optimize a model with 1343 rows, 895 columns and 3880 nonzeros Presolve removed 149 rows and 149 columns Presolve time: 0.00s Presolved: 1194 rows, 746 columns, 3582 nonzeros Variable types: 0 continuous, 746 integer (746 binary) Root relaxation: objective 0.000000e+00, 160 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 0 149 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (647 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 18:46:32 2012 Optimize a model with 1940 rows, 1044 columns and 5820 nonzeros Presolve time: 0.00s Presolved: 1940 rows, 1044 columns, 5820 nonzeros Variable types: 0 continuous, 1044 integer (1044 binary) Root relaxation: objective 0.000000e+00, 343 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 0 294 - 0.00000 - - 0s 0 0 0.00000 0 290 - 0.00000 - - 0s 0 0 0.00000 0 404 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 13 Zero half: 357 Explored 0 nodes (6670 simplex iterations) in 0.68 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