EvoMaster core process runs on the JVM.
Depending on the tested application, and for how long you run it, it might end up that EvoMaster runs out of memory, throwing for example a java.lang.OutOfMemoryError exception.
This can happen even if you have enough memory left!
By default, a Java application can use up to 1/4 of your total memory.
For example, on a 16GB RAM laptop, it would not use more than 4GB of RAM.
This is fine in most cases.
But, if you get a java.lang.OutOfMemoryError, you might need to increase such limit.
This can be achieved with the -Xmx JVM option.
For example:
java -Xmx8g -jar core/target/evomaster.jar ...
If you have installed EvoMaster via one of its OS installers, you might need to check its configuration files where the executable file is located.
A possibility could be to modify the evomaster.cfg file, in particular its java-options entry (note: we have not tested out if this works on all OS).