current bounds on the number of colors: 0 -- 143 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:41:54 2012 Optimize a model with 35785 rows, 10655 columns and 117079 nonzeros Presolve time: 0.14s Presolved: 35785 rows, 10655 columns, 117079 nonzeros Variable types: 0 continuous, 10655 integer (10655 binary) Root relaxation: objective 0.000000e+00, 463 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 (751 simplex iterations) in 0.22 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 -- 71 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:41:55 2012 Optimize a model with 17713 rows, 5507 columns and 57715 nonzeros Presolve time: 0.09s Presolved: 17713 rows, 5507 columns, 57715 nonzeros Variable types: 0 continuous, 5507 integer (5507 binary) Root relaxation: objective 0.000000e+00, 367 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 (630 simplex iterations) in 0.12 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 -- 35 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:41:55 2012 Optimize a model with 8677 rows, 2933 columns and 28033 nonzeros Presolve time: 0.03s Presolved: 8677 rows, 2933 columns, 28033 nonzeros Variable types: 0 continuous, 2933 integer (2933 binary) Root relaxation: objective 0.000000e+00, 288 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 (528 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 -- 17 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:41:56 2012 Optimize a model with 4159 rows, 1646 columns and 13192 nonzeros Presolve time: 0.01s Presolved: 4159 rows, 1646 columns, 13192 nonzeros Variable types: 0 continuous, 1646 integer (1646 binary) Root relaxation: objective 0.000000e+00, 304 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 (563 simplex iterations) in 0.02 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 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:41:56 2012 Optimize a model with 2151 rows, 1074 columns and 6596 nonzeros Presolve time: 0.01s Presolved: 2151 rows, 1074 columns, 6596 nonzeros Variable types: 0 continuous, 1074 integer (1074 binary) Root relaxation: objective 0.000000e+00, 314 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 0 264 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1353 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:41:56 2012 Optimize a model with 1147 rows, 788 columns and 3298 nonzeros Presolve removed 143 rows and 143 columns Presolve time: 0.00s Presolved: 1004 rows, 645 columns, 3012 nonzeros Variable types: 0 continuous, 645 integer (645 binary) Root relaxation: objective 0.000000e+00, 152 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 0 143 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (621 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 18:41:56 2012 Optimize a model with 1649 rows, 931 columns and 4947 nonzeros Presolve time: 0.00s Presolved: 1649 rows, 931 columns, 4947 nonzeros Variable types: 0 continuous, 931 integer (931 binary) Root relaxation: objective 0.000000e+00, 333 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 0 270 - 0.00000 - - 0s 0 0 0.00000 0 276 - 0.00000 - - 0s 0 0 0.00000 0 304 - 0.00000 - - 0s 0 0 0.00000 0 387 - 0.00000 - - 0s 0 0 0.00000 0 332 - 0.00000 - - 0s 0 0 0.00000 0 349 - 0.00000 - - 0s 0 0 0.00000 0 369 - 0.00000 - - 1s 0 0 0.00000 0 364 - 0.00000 - - 1s 0 0 0.00000 0 313 - 0.00000 - - 1s 0 0 0.00000 0 362 - 0.00000 - - 1s 0 0 0.00000 0 370 - 0.00000 - - 2s 0 0 0.00000 0 359 - 0.00000 - - 2s 0 2 0.00000 0 359 - 0.00000 - - 2s Cutting planes: Zero half: 18 Explored 3 nodes (21617 simplex iterations) in 2.46 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