current bounds on the number of colors: 0 -- 164 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:52:25 2012 Optimize a model with 54120 rows, 14106 columns and 175316 nonzeros Presolve removed 1 rows and 82 columns Presolve time: 0.16s Presolved: 54119 rows, 14024 columns, 175234 nonzeros Variable types: 0 continuous, 14024 integer (14024 binary) Root relaxation: objective 0.000000e+00, 604 iterations, 0.05 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 (967 simplex iterations) in 0.30 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 -- 82 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:52:26 2012 Optimize a model with 27142 rows, 7382 columns and 87658 nonzeros Presolve removed 1 rows and 41 columns Presolve time: 0.14s Presolved: 27141 rows, 7341 columns, 87617 nonzeros Variable types: 0 continuous, 7341 integer (7341 binary) Root relaxation: objective 0.000000e+00, 480 iterations, 0.02 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 (838 simplex iterations) in 0.20 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 -- 41 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:52:26 2012 Optimize a model with 13324 rows, 3938 columns and 42760 nonzeros Presolve removed 1 rows and 20 columns Presolve time: 0.05s Presolved: 13323 rows, 3918 columns, 42740 nonzeros Variable types: 0 continuous, 3918 integer (3918 binary) Root relaxation: objective 0.000000e+00, 346 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 (624 simplex iterations) in 0.08 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 -- 20 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:52:27 2012 Optimize a model with 6744 rows, 2298 columns and 21380 nonzeros Presolve removed 1 rows and 10 columns Presolve time: 0.02s Presolved: 6743 rows, 2288 columns, 21370 nonzeros Variable types: 0 continuous, 2288 integer (2288 binary) Root relaxation: objective 0.000000e+00, 348 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 (650 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 19:52:27 2012 Optimize a model with 3454 rows, 1478 columns and 10690 nonzeros Presolve removed 1 rows and 5 columns Presolve time: 0.01s Presolved: 3453 rows, 1473 columns, 10685 nonzeros Variable types: 0 continuous, 1473 integer (1473 binary) Root relaxation: objective 0.000000e+00, 363 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 (1774 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:52:27 2012 Optimize a model with 1480 rows, 986 columns and 4276 nonzeros Presolve removed 164 rows and 165 columns Presolve time: 0.00s Presolved: 1316 rows, 821 columns, 3948 nonzeros Variable types: 0 continuous, 821 integer (821 binary) Root relaxation: objective 0.000000e+00, 164 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 0 163 - 0.00000 - - 0s Explored 0 nodes (665 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:52:27 2012 Optimize a model with 2138 rows, 1150 columns and 6414 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.01s Presolved: 2137 rows, 1147 columns, 6411 nonzeros Variable types: 0 continuous, 1147 integer (1147 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 0.00000 0 320 - 0.00000 - - 0s 0 0 0.00000 0 320 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3717 simplex iterations) in 0.31 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 19:52:27 2012 Optimize a model with 2796 rows, 1314 columns and 8552 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.01s Presolved: 2795 rows, 1310 columns, 8548 nonzeros Variable types: 0 continuous, 1310 integer (1310 binary) Root relaxation: objective 0.000000e+00, 400 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 0 304 - 0.00000 - - 0s 0 0 0.00000 0 294 - 0.00000 - - 0s 0 0 0.00000 0 304 - 0.00000 - - 0s 0 0 0.00000 0 320 - 0.00000 - - 0s 0 0 0.00000 0 302 - 0.00000 - - 0s 0 0 0.00000 0 320 - 0.00000 - - 1s 0 0 0.00000 0 321 - 0.00000 - - 1s 0 0 0.00000 0 298 - 0.00000 - - 1s 0 2 0.00000 0 298 - 0.00000 - - 1s 606 179 0.00000 13 298 - 0.00000 - 61.2 5s 738 211 infeasible 24 - 0.00000 - 105 10s * 864 93 31 0.0000000 0.00000 0.0% 107 10s Cutting planes: Zero half: 11 Explored 865 nodes (108890 simplex iterations) in 10.76 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