current bounds on the number of colors: 0 -- 147 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:44:26 2012 Optimize a model with 43363 rows, 11323 columns and 140379 nonzeros Presolve time: 0.15s Presolved: 43363 rows, 11323 columns, 140379 nonzeros Variable types: 0 continuous, 11323 integer (11323 binary) Root relaxation: objective 0.000000e+00, 543 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 (858 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 -- 73 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:44:27 2012 Optimize a model with 21459 rows, 5884 columns and 69228 nonzeros Presolve time: 0.11s Presolved: 21459 rows, 5884 columns, 69228 nonzeros Variable types: 0 continuous, 5884 integer (5884 binary) Root relaxation: objective 0.000000e+00, 390 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 (674 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 -- 36 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:44:27 2012 Optimize a model with 10803 rows, 3238 columns and 34614 nonzeros Presolve time: 0.04s Presolved: 10803 rows, 3238 columns, 34614 nonzeros Variable types: 0 continuous, 3238 integer (3238 binary) Root relaxation: objective 0.000000e+00, 302 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 (552 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 18:44:28 2012 Optimize a model with 5475 rows, 1915 columns and 17307 nonzeros Presolve time: 0.02s Presolved: 5475 rows, 1915 columns, 17307 nonzeros Variable types: 0 continuous, 1915 integer (1915 binary) Root relaxation: objective 0.000000e+00, 307 iterations, 0.00 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 (570 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 18:44:28 2012 Optimize a model with 2515 rows, 1180 columns and 7692 nonzeros Presolve time: 0.01s Presolved: 2515 rows, 1180 columns, 7692 nonzeros Variable types: 0 continuous, 1180 integer (1180 binary) Root relaxation: objective 0.000000e+00, 331 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 0 268 - 0.00000 - - 0s 0 0 0.00000 0 268 - 0.00000 - - 0s 0 0 0.00000 0 270 - 0.00000 - - 0s 0 0 0.00000 0 364 - 0.00000 - - 0s 0 0 0.00000 0 198 - 0.00000 - - 0s 0 0 0.00000 0 251 - 0.00000 - - 0s 0 0 0.00000 0 320 - 0.00000 - - 1s 0 0 0.00000 0 252 - 0.00000 - - 1s 0 2 0.00000 0 252 - 0.00000 - - 1s * 46 2 21 0.0000000 0.00000 0.0% 63.2 1s Cutting planes: Zero half: 5 Explored 47 nodes (17887 simplex iterations) in 1.55 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 18:44:29 2012 Optimize a model with 1331 rows, 886 columns and 3846 nonzeros Presolve removed 147 rows and 147 columns Presolve time: 0.00s Presolved: 1184 rows, 739 columns, 3552 nonzeros Variable types: 0 continuous, 739 integer (739 binary) Root relaxation: objective 0.000000e+00, 154 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 (634 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 18:44:29 2012 Optimize a model with 1923 rows, 1033 columns and 5769 nonzeros Presolve time: 0.00s Presolved: 1923 rows, 1033 columns, 5769 nonzeros Variable types: 0 continuous, 1033 integer (1033 binary) Root relaxation: objective 0.000000e+00, 335 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 0 288 - 0.00000 - - 0s 0 0 0.00000 0 288 - 0.00000 - - 0s 0 0 0.00000 0 361 - 0.00000 - - 0s 0 0 0.00000 0 411 - 0.00000 - - 0s 0 0 0.00000 0 398 - 0.00000 - - 0s 0 0 0.00000 0 374 - 0.00000 - - 1s 0 0 0.00000 0 384 - 0.00000 - - 1s 0 0 0.00000 0 392 - 0.00000 - - 1s 0 0 0.00000 0 366 - 0.00000 - - 2s 0 0 0.00000 0 399 - 0.00000 - - 2s 0 0 0.00000 0 398 - 0.00000 - - 2s 0 2 0.00000 0 382 - 0.00000 - - 2s Cutting planes: Zero half: 18 Explored 3 nodes (20697 simplex iterations) in 2.94 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