Plugin fails with error on newly added to src code classes

[volivan239]

Description

After re-launching plugin on newly added to src code classes, it fails with error message "Failed to generate unit tests for class ..."

To Reproduce

1. Open project in sandbox
2. Launch plugin on any method/class (this step is essential)
3. Add another class to that src code
4. Launch plugin again on newly added class

Expected behavior

Tests are generated

Actual behavior

Error message is produced.

Additional context

We have a big runCatching in UtTestsDialogProcessor.kt (lines 218-236). If comment them, plugin will fail with java.util.NoSuchElementException: Collection contains no element matching the predicate.:

java.util.NoSuchElementException: Collection contains no element matching the predicate.
	at org.utbot.framework.util.SootUtilsKt.jimpleBody(SootUtils.kt:199)
	at org.utbot.engine.UtBotSymbolicEngine.<init>(UtBotSymbolicEngine.kt:165)
	at org.utbot.framework.plugin.api.TestCaseGenerator.createSymbolicEngine(TestCaseGenerator.kt:257)
	at org.utbot.framework.plugin.api.TestCaseGenerator.access$createSymbolicEngine(TestCaseGenerator.kt:56)
	at org.utbot.framework.plugin.api.TestCaseGenerator$generate$3$1$1.invokeSuspend(TestCaseGenerator.kt:153)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
	at kotlinx.coroutines.EventLoopImplBase.processNextEvent(EventLoop.common.kt:284)
	at kotlinx.coroutines.BlockingCoroutine.joinBlocking(Builders.kt:85)
	at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking(Builders.kt:59)
	at kotlinx.coroutines.BuildersKt.runBlocking(Unknown Source)
	at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking$default(Builders.kt:38)
	at kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source)
	at org.utbot.common.ConcurrencyKt.runBlockingWithCancellationPredicate(Concurrency.kt:38)
	at org.utbot.framework.plugin.api.TestCaseGenerator$generate$3.invoke(TestCaseGenerator.kt:145)
	at org.utbot.framework.plugin.api.TestCaseGenerator$generate$3.invoke(TestCaseGenerator.kt:144)
	at org.utbot.common.ConcurrencyKt.runIgnoringCancellationException(Concurrency.kt:47)
	at org.utbot.framework.plugin.api.TestCaseGenerator.generate(TestCaseGenerator.kt:144)
	at org.utbot.intellij.plugin.generator.UtTestsDialogProcessor$createTests$2$1.run(UtTestsDialogProcessor.kt:221)
	at com.intellij.openapi.progress.impl.CoreProgressManager.startTask(CoreProgressManager.java:450)
	at com.intellij.openapi.progress.impl.ProgressManagerImpl.startTask(ProgressManagerImpl.java:117)
	at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcessWithProgressAsync$5(CoreProgressManager.java:510)
	at com.intellij.openapi.progress.impl.ProgressRunner.lambda$submit$3(ProgressRunner.java:243)
	at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$2(CoreProgressManager.java:183)
	at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:705)
	at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:647)
	at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:63)
	at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:170)
	at com.intellij.openapi.progress.impl.ProgressRunner.lambda$submit$4(ProgressRunner.java:243)
	at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1700)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:668)
	at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:665)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1.run(Executors.java:665)
	at java.base/java.lang.Thread.run(Thread.java:829)

Seems like problem is that list of soot classes is not updated properly -- it hasn't newly added class in it.