current bounds on the number of colors: 0 -- 170 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:14:24 2012 Optimize a model with 60690 rows, 15162 columns and 196010 nonzeros Presolve time: 0.19s Presolved: 60690 rows, 15162 columns, 196010 nonzeros Variable types: 0 continuous, 15162 integer (15162 binary) Root relaxation: objective 0.000000e+00, 605 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 (976 simplex iterations) in 0.33 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 -- 85 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:14:25 2012 Optimize a model with 30074 rows, 7852 columns and 96852 nonzeros Presolve time: 0.14s Presolved: 30074 rows, 7852 columns, 96852 nonzeros Variable types: 0 continuous, 7852 integer (7852 binary) Root relaxation: objective 0.000000e+00, 560 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 (916 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 -- 42 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:14:25 2012 Optimize a model with 15122 rows, 4282 columns and 48426 nonzeros Presolve time: 0.06s Presolved: 15122 rows, 4282 columns, 48426 nonzeros Variable types: 0 continuous, 4282 integer (4282 binary) Root relaxation: objective 0.000000e+00, 379 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 (671 simplex iterations) in 0.09 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 -- 21 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:14:26 2012 Optimize a model with 7290 rows, 2412 columns and 23060 nonzeros Presolve time: 0.02s Presolved: 7290 rows, 2412 columns, 23060 nonzeros Variable types: 0 continuous, 2412 integer (2412 binary) Root relaxation: objective 0.000000e+00, 358 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 (632 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 21:14:26 2012 Optimize a model with 3730 rows, 1562 columns and 11530 nonzeros Presolve time: 0.01s Presolved: 3730 rows, 1562 columns, 11530 nonzeros Variable types: 0 continuous, 1562 integer (1562 binary) Root relaxation: objective 0.000000e+00, 386 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 0 112 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (2267 simplex iterations) in 0.09 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 21:14:26 2012 Optimize a model with 1594 rows, 1052 columns and 4612 nonzeros Presolve removed 170 rows and 170 columns Presolve time: 0.00s Presolved: 1424 rows, 882 columns, 4272 nonzeros Variable types: 0 continuous, 882 integer (882 binary) Root relaxation: objective 0.000000e+00, 176 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 0 170 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (732 simplex iterations) in 0.02 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 21:14:26 2012 Optimize a model with 2306 rows, 1222 columns and 6918 nonzeros Presolve time: 0.01s Presolved: 2306 rows, 1222 columns, 6918 nonzeros Variable types: 0 continuous, 1222 integer (1222 binary) Root relaxation: objective 0.000000e+00, 379 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 0 336 - 0.00000 - - 0s 0 0 0.00000 0 336 - 0.00000 - - 0s 0 0 0.00000 0 393 - 0.00000 - - 0s 0 0 0.00000 0 465 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 1 Clique: 1 Zero half: 304 Explored 0 nodes (7403 simplex iterations) in 0.82 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 21:14:27 2012 Optimize a model with 3018 rows, 1392 columns and 9224 nonzeros Presolve time: 0.01s Presolved: 3018 rows, 1392 columns, 9224 nonzeros Variable types: 0 continuous, 1392 integer (1392 binary) Root relaxation: objective 0.000000e+00, 394 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 0 316 - 0.00000 - - 0s 0 0 0.00000 0 326 - 0.00000 - - 0s 0 0 0.00000 0 316 - 0.00000 - - 0s 0 0 0.00000 0 332 - 0.00000 - - 0s 0 0 0.00000 0 312 - 0.00000 - - 0s 0 0 0.00000 0 302 - 0.00000 - - 0s 0 0 0.00000 0 300 - 0.00000 - - 0s 0 0 0.00000 0 298 - 0.00000 - - 1s 0 0 0.00000 0 292 - 0.00000 - - 1s 0 0 0.00000 0 298 - 0.00000 - - 1s 0 0 0.00000 0 280 - 0.00000 - - 1s 0 0 0.00000 0 278 - 0.00000 - - 1s 0 0 0.00000 0 274 - 0.00000 - - 1s 0 0 0.00000 0 266 - 0.00000 - - 2s 0 0 0.00000 0 260 - 0.00000 - - 2s 0 0 0.00000 0 268 - 0.00000 - - 2s 0 0 0.00000 0 250 - 0.00000 - - 2s 0 0 0.00000 0 236 - 0.00000 - - 2s 0 0 0.00000 0 234 - 0.00000 - - 3s 0 0 0.00000 0 232 - 0.00000 - - 3s 0 0 0.00000 0 206 - 0.00000 - - 3s 0 0 0.00000 0 210 - 0.00000 - - 3s 0 0 0.00000 0 202 - 0.00000 - - 3s 0 0 0.00000 0 188 - 0.00000 - - 3s 0 0 0.00000 0 192 - 0.00000 - - 4s 0 0 0.00000 0 192 - 0.00000 - - 4s 0 2 0.00000 0 192 - 0.00000 - - 4s 114 48 0.00000 25 253 - 0.00000 - 84.0 5s 612 182 0.00000 25 246 - 0.00000 - 60.8 10s 980 184 infeasible 30 - 0.00000 - 121 15s * 1357 2 26 0.0000000 0.00000 0.0% 125 17s Cutting planes: Zero half: 6 Explored 1358 nodes (221221 simplex iterations) in 17.56 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