current bounds on the number of colors: 0 -- 147 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:45:03 2012 Optimize a model with 39421 rows, 11269 columns and 128553 nonzeros Presolve time: 0.16s Presolved: 39421 rows, 11269 columns, 128553 nonzeros Variable types: 0 continuous, 11269 integer (11269 binary) Root relaxation: objective 0.000000e+00, 499 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 (779 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 -- 73 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:45:03 2012 Optimize a model with 19515 rows, 5830 columns and 63396 nonzeros Presolve time: 0.10s Presolved: 19515 rows, 5830 columns, 63396 nonzeros Variable types: 0 continuous, 5830 integer (5830 binary) Root relaxation: objective 0.000000e+00, 384 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 (645 simplex iterations) in 0.14 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 -- 36 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:45:04 2012 Optimize a model with 9831 rows, 3184 columns and 31698 nonzeros Presolve time: 0.04s Presolved: 9831 rows, 3184 columns, 31698 nonzeros Variable types: 0 continuous, 3184 integer (3184 binary) Root relaxation: objective 0.000000e+00, 299 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 (555 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 18:45:04 2012 Optimize a model with 4989 rows, 1861 columns and 15849 nonzeros Presolve time: 0.01s Presolved: 4989 rows, 1861 columns, 15849 nonzeros Variable types: 0 continuous, 1861 integer (1861 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 (591 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 18:45:04 2012 Optimize a model with 2299 rows, 1126 columns and 7044 nonzeros Presolve time: 0.01s Presolved: 2299 rows, 1126 columns, 7044 nonzeros Variable types: 0 continuous, 1126 integer (1126 binary) Root relaxation: objective 0.000000e+00, 311 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 0.00000 0 260 - 0.00000 - - 0s 0 0 0.00000 0 211 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (6958 simplex iterations) in 0.41 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 18:45:04 2012 Optimize a model with 1223 rows, 832 columns and 3522 nonzeros Presolve removed 147 rows and 147 columns Presolve time: 0.00s Presolved: 1076 rows, 685 columns, 3228 nonzeros Variable types: 0 continuous, 685 integer (685 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 0 147 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (622 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 18:45:05 2012 Optimize a model with 1761 rows, 979 columns and 5283 nonzeros Presolve time: 0.00s Presolved: 1761 rows, 979 columns, 5283 nonzeros Variable types: 0 continuous, 979 integer (979 binary) Root relaxation: objective 0.000000e+00, 327 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 0 292 - 0.00000 - - 0s 0 0 0.00000 0 290 - 0.00000 - - 0s 0 0 0.00000 0 338 - 0.00000 - - 0s 0 0 0.00000 0 369 - 0.00000 - - 0s 0 0 0.00000 0 367 - 0.00000 - - 0s 0 0 0.00000 0 364 - 0.00000 - - 0s 0 0 0.00000 0 321 - 0.00000 - - 1s 0 0 0.00000 0 382 - 0.00000 - - 1s 0 0 0.00000 0 334 - 0.00000 - - 1s 0 0 0.00000 0 355 - 0.00000 - - 1s 0 0 0.00000 0 383 - 0.00000 - - 2s 0 0 0.00000 0 383 - 0.00000 - - 2s 0 2 0.00000 0 383 - 0.00000 - - 2s Cutting planes: Zero half: 17 Explored 3 nodes (21355 simplex iterations) in 2.24 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 4