current bounds on the number of colors: 0 -- 155 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:57:23 2012 Optimize a model with 49897 rows, 12581 columns and 161161 nonzeros Presolve time: 0.16s Presolved: 49897 rows, 12581 columns, 161161 nonzeros Variable types: 0 continuous, 12581 integer (12581 binary) Root relaxation: objective 0.000000e+00, 541 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 (875 simplex iterations) in 0.27 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 -- 77 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:57:24 2012 Optimize a model with 24703 rows, 6536 columns and 79534 nonzeros Presolve time: 0.13s Presolved: 24703 rows, 6536 columns, 79534 nonzeros Variable types: 0 continuous, 6536 integer (6536 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 (666 simplex iterations) in 0.18 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 -- 38 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:57:25 2012 Optimize a model with 12429 rows, 3591 columns and 39767 nonzeros Presolve time: 0.05s Presolved: 12429 rows, 3591 columns, 39767 nonzeros Variable types: 0 continuous, 3591 integer (3591 binary) Root relaxation: objective 0.000000e+00, 314 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 (595 simplex iterations) in 0.07 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 -- 19 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:57:25 2012 Optimize a model with 5969 rows, 2041 columns and 18837 nonzeros Presolve time: 0.02s Presolved: 5969 rows, 2041 columns, 18837 nonzeros Variable types: 0 continuous, 2041 integer (2041 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (869 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 -- 9 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:57:25 2012 Optimize a model with 2739 rows, 1266 columns and 8372 nonzeros Presolve time: 0.01s Presolved: 2739 rows, 1266 columns, 8372 nonzeros Variable types: 0 continuous, 1266 integer (1266 binary) Root relaxation: objective 0.000000e+00, 353 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 0 152 - 0.00000 - - 0s 0 0 0.00000 0 196 - 0.00000 - - 0s 0 0 0.00000 0 282 - 0.00000 - - 0s 0 0 0.00000 0 301 - 0.00000 - - 0s 0 0 0.00000 0 268 - 0.00000 - - 0s 0 0 0.00000 0 248 - 0.00000 - - 1s 0 0 0.00000 0 242 - 0.00000 - - 1s 0 0 0.00000 0 238 - 0.00000 - - 1s 0 0 0.00000 0 224 - 0.00000 - - 1s 0 0 0.00000 0 190 - 0.00000 - - 1s 0 0 0.00000 0 202 - 0.00000 - - 2s 0 0 0.00000 0 188 - 0.00000 - - 2s 0 0 0.00000 0 196 - 0.00000 - - 2s 0 0 0.00000 0 186 - 0.00000 - - 2s 0 0 0.00000 0 197 - 0.00000 - - 2s 0 0 0.00000 0 280 - 0.00000 - - 3s 0 0 0.00000 0 162 - 0.00000 - - 3s 0 2 0.00000 0 162 - 0.00000 - - 3s 563 59 0.00000 13 200 - 0.00000 - 65.5 5s 820 65 0.00000 13 258 - 0.00000 - 61.4 10s 1262 86 0.00000 21 251 - 0.00000 - 118 15s 1839 97 infeasible 24 - 0.00000 - 135 20s 2434 86 0.00000 28 295 - 0.00000 - 142 25s 3070 82 infeasible 27 - 0.00000 - 145 30s 3655 45 infeasible 24 - 0.00000 - 148 35s 4206 20 0.00000 26 240 - 0.00000 - 151 40s Cutting planes: Zero half: 5 Explored 4383 nodes (706824 simplex iterations) in 41.58 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - current bounds on the number of colors: 4 -- 9 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:58:07 2012 Optimize a model with 4031 rows, 1576 columns and 12558 nonzeros Presolve time: 0.01s Presolved: 4031 rows, 1576 columns, 12558 nonzeros Variable types: 0 continuous, 1576 integer (1576 binary) Root relaxation: objective 0.000000e+00, 351 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 (1041 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: 4 -- 6 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:58:07 2012 Optimize a model with 3385 rows, 1421 columns and 10465 nonzeros Presolve time: 0.01s Presolved: 3385 rows, 1421 columns, 10465 nonzeros Variable types: 0 continuous, 1421 integer (1421 binary) Root relaxation: objective 0.000000e+00, 351 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 (1270 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% optimal solution found: number of colors: 5