--- Job rentacar Start 07/26/08 13:24:08 GAMS Rev 227 Copyright (C) 1987-2008 GAMS Development. All rights reserved Licensee: Stefan Vigerske G071106/0001CB-LNX Humboldt University Berlin, Numerical Mathematics DC5918 --- Starting compilation --- rentacar.gms(106) 2 Mb --- GDXin=/home/stefan/work/gams/models/LINlib/rentacar.gdx --- rentacar.gms(148) 6 Mb --- Starting execution: elapsed 0:00:00.115 --- rentacar.gms(123) 6 Mb --- Generating MIP model m --- rentacar.gms(124) 8 Mb --- 6,785 rows 9,559 columns 42,021 non-zeroes --- 55 discrete-columns --- rentacar.gms(124) 8 Mb --- Executing Cbc: elapsed 0:00:00.293 GAMS/Cbc 2.1 LP/MIP Solver written by J. Forrest Reading parameter(s) from "/home/stefan/work/gams/benchmarks/LINLib.MIP/cbc.op2" >> threads 2 Finished reading from "/home/stefan/work/gams/benchmarks/LINLib.MIP/cbc.op2" Problem statistics: 9558 columns and 6784 rows. 55 variables have integrality restrictions. Calling CBC main solution routine... Coin Cbc and Clp Solver version 2.10.00, build Jul 26 2008 command line - GAMS/CBC -threads 2 -solve -quit threads was changed from 0 to 2 Continuous objective value is 2.81495e+07 - 0.27 seconds 10 fixed, 1 tightened bounds, 9 strengthened rows, 0 substitutions 1 fixed, 0 tightened bounds, 4 strengthened rows, 0 substitutions 0 fixed, 0 tightened bounds, 4 strengthened rows, 0 substitutions 0 fixed, 0 tightened bounds, 4 strengthened rows, 0 substitutions 0 fixed, 0 tightened bounds, 4 strengthened rows, 0 substitutions 0 fixed, 0 tightened bounds, 4 strengthened rows, 0 substitutions 0 fixed, 0 tightened bounds, 4 strengthened rows, 0 substitutions 0 fixed, 0 tightened bounds, 4 strengthened rows, 0 substitutions 0 fixed, 0 tightened bounds, 4 strengthened rows, 0 substitutions 0 fixed, 0 tightened bounds, 4 strengthened rows, 0 substitutions 0 fixed, 0 tightened bounds, 4 strengthened rows, 0 substitutions processed model has 1156 rows, 2927 columns (24 integer) and 18118 elements Pass 1: suminf. 0.36196 obj. 3.25896e+08 iterations 609 Pass 2: suminf. 0.00000 obj. 2.91789e+08 iterations 158 Solution found of 2.91789e+08 Before mini branch and bound, 14 integers at bound fixed and 2170 continuous Full problem 1156 rows 2927 columns, reduced to 453 rows 536 columns Mini branch and bound improved solution from 2.91789e+08 to 2.89797e+07 (1.78 seconds) Freeing continuous variables gives a solution of 2.88825e+07 Round again with cutoff of 2.88214e+07 Pass 3: suminf. 1.30808 obj. 2.88214e+07 iterations 133 Pass 4: suminf. 0.00015 obj. 2.88214e+07 iterations 222 Pass 5: suminf. 0.00015 obj. 2.88214e+07 iterations 0 Pass 6: suminf. 0.91276 obj. 2.88214e+07 iterations 158 Pass 7: suminf. 0.35542 obj. 2.88214e+07 iterations 165 Pass 8: suminf. 0.00016 obj. 2.88214e+07 iterations 5 Pass 9: suminf. 0.00016 obj. 2.88214e+07 iterations 0 Pass 10: suminf. 0.74036 obj. 2.88214e+07 iterations 201 Pass 11: suminf. 0.43417 obj. 2.88214e+07 iterations 95 Pass 12: suminf. 0.14695 obj. 2.88214e+07 iterations 181 Pass 13: suminf. 0.00035 obj. 2.88214e+07 iterations 140 Pass 14: suminf. 0.00035 obj. 2.88214e+07 iterations 0 Pass 15: suminf. 0.08604 obj. 2.88214e+07 iterations 95 Pass 16: suminf. 0.53102 obj. 2.88214e+07 iterations 127 Pass 17: suminf. 0.00038 obj. 2.88214e+07 iterations 70 Pass 18: suminf. 0.00038 obj. 2.88214e+07 iterations 0 Pass 19: suminf. 0.56420 obj. 2.88214e+07 iterations 88 Pass 20: suminf. 0.67449 obj. 2.88214e+07 iterations 159 Pass 21: suminf. 0.10291 obj. 2.88214e+07 iterations 133 Pass 22: suminf. 1.08498 obj. 2.88214e+07 iterations 164 No solution found this major pass Before mini branch and bound, 7 integers at bound fixed and 2322 continuous Full problem 1156 rows 2927 columns, reduced to 371 rows 378 columns Mini branch and bound did not improve solution (2.94 seconds) After 2.94 seconds - Feasibility pump exiting with objective of 2.88825e+07 - took 2.92 seconds Integer solution of 2.88825e+07 found by feasibility pump after 0 iterations and 0 nodes (2.94 seconds) Full problem 1156 rows 2927 columns, reduced to 972 rows 2646 columns - too large 30 added rows had average density of 5.43333 At root node, 30 cuts changed objective from 2.82717e+07 to 2.86823e+07 in 7 passes Cut generator 0 (Probing) - 59 row cuts (21 active), 0 column cuts in 0.020 seconds - new frequency is 1 Cut generator 1 (Gomory) - 2 row cuts (0 active), 0 column cuts in 0.016 seconds - new frequency is -100 Cut generator 2 (Knapsack) - 0 row cuts (0 active), 0 column cuts in 0.028 seconds - new frequency is -100 Cut generator 3 (Clique) - 0 row cuts (0 active), 0 column cuts in 0.004 seconds - new frequency is -100 Cut generator 4 (MixedIntegerRounding2) - 12 row cuts (3 active), 0 column cuts in 0.008 seconds - new frequency is 1 Cut generator 5 (FlowCover) - 1 row cuts (0 active), 0 column cuts in 0.044 seconds - new frequency is -100 Cut generator 6 (TwoMirCuts) - 13 row cuts (6 active), 0 column cuts in 0.028 seconds - new frequency is -100 After 0 nodes, 1 on tree, 2.88825e+07 best solution, best possible 2.86823e+07 (3.64 seconds) Thread 0 used 2 times, waiting to start 0.00861525, 0.280018 cpu time, 10 locks, 0.000388898 locked, 1.55471e-05 waiting for locks Thread 1 used 0 times, waiting to start 0.295613, 0 cpu time, 0 locks, 0 locked, 0 waiting for locks Main thread 0.295165 waiting for threads, 10 locks, 2.9546e-05 locked, 1.48289e-05 waiting for locks Search completed - best objective 28882470.94755347, took 419 iterations and 2 nodes (3.92 seconds) Strong branching done 58 times (3232 iterations), fathomed 1 nodes and fixed 0 variables Maximum depth 0, 0 variables fixed on reduced cost Cuts at root node changed objective from 2.82717e+07 to 2.86823e+07 Probing was tried 22 times and created 180 cuts of which 65 were active after adding rounds of cuts (0.060 seconds) Gomory was tried 21 times and created 6 cuts of which 0 were active after adding rounds of cuts (0.048 seconds) Knapsack was tried 21 times and created 0 cuts of which 0 were active after adding rounds of cuts (0.084 seconds) Clique was tried 21 times and created 0 cuts of which 0 were active after adding rounds of cuts (0.012 seconds) MixedIntegerRounding2 was tried 22 times and created 36 cuts of which 9 were active after adding rounds of cuts (0.024 seconds) FlowCover was tried 21 times and created 3 cuts of which 0 were active after adding rounds of cuts (0.132 seconds) TwoMirCuts was tried 21 times and created 39 cuts of which 18 were active after adding rounds of cuts (0.084 seconds) 2168 bounds tightened after postprocessing Result - Finished objective 28882470.94755347 after 2 nodes and 419 iterations - took 4.95 seconds (total time 5.24) Total time 7.76 Solved to optimality. wallclocktime: 7.89417 used seconds: 7.78 MIP solution: 28882470.95 (2 nodes, 7.78 seconds) Best possible: 28882470.95 Absolute gap: 0 (absolute tolerance optca: 0) Relative gap: 0 (relative tolerance optcr: 0) --- Restarting execution --- rentacar.gms(124) 0 Mb --- Reading solution for model m --- rentacar.gms(124) 6 Mb *** Status: Normal completion --- Job rentacar.gms Stop 07/26/08 13:24:16 elapsed 0:00:08.336