The updated configuration string is
./fast-downward.py $BENCHMARKS/airport/p50-airport5MUC-p15.pddl --search "eager_greedy([lmcount(lm_factory=lm_reasonable_orders_hps(lm_hm()))])"
When I run this with a memory limit, I quickly run out of memory with this (end of) output:
INFO search command line string: /home/helmert/downward/master/builds/release/bin/downward --search 'eager_greedy([lmcount(lm_factory=lm_reasonable_orders_hps(lm_hm()))])' --internal-plan-file sas_plan < output.sas
[t=1.645e-05s, 9880 KB] reading input...
[t=0.0757357s, 22020 KB] done reading input!
[t=0.0771249s, 22416 KB] Initializing landmark count heuristic...
[t=0.0771588s, 22416 KB] Generating landmark graph...
[t=0.0784749s, 23528 KB] Building a landmark graph with reasonable orders.
[t=0.0797567s, 24448 KB] h^m landmarks m=2
Failed to allocate memory.
Memory limit has been reached.
Peak memory: 3695084 KB
Remove intermediate file output.sas
search exit code: 22
Driver aborting after search
INFO Planner time: 2.8e+01s
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