Fuzzing is stopped because of an error IllegalStateException: unknown type of value abc (class kotlin.String)

[tyuldashev]

Description
Fuzzing cannot generate tests for String::startWith with constant string as parameter.

To Reproduce

1. Install UnitTestBot plugin built from main in IntelliJ IDEA
2. Open UTBot project
3. Set Fuzzing = 100%
4. Generate tests for org.utbot.examples.strings.StringExamples#prefixWithOffset methods.

    public int prefixWithOffset(int o) {
        return "babc".startsWith("abc", o) ? 1 : 2;
    }

Expected behavior
Tests are generated.

Actual behavior
No tests are generated. The is an error in the log.

Screenshots, logs
utbot-engine-current.log:

13:35:54.089 | INFO  | JavaLanguage              | Fuzzing is stopped because of an error
java.lang.IllegalStateException: unknown type of value abc (class kotlin.String)
	at org.utbot.fuzzing.seeds.BitVectorValue$Companion.fromValue(BitVectorValue.kt:166) ~[utbot-fuzzing-2023.8.5094.jar:?]
	at org.utbot.fuzzing.providers.IntegerValueProvider$generate$1.invokeSuspend(Primitives.kt:140) ~[utbot-java-fuzzing-2023.8.5094.jar:?]
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33) ~[kotlin-stdlib-1.8.10.jar:1.8.10-release-430(1.8.10)]
	at kotlin.sequences.SequenceBuilderIterator.hasNext(SequenceBuilder.kt:129) ~[kotlin-stdlib-1.8.10.jar:1.8.10-release-430(1.8.10)]
	at org.utbot.fuzzing.ValueProvider$Combined$generate$1.invokeSuspend(Providers.kt:231) ~[utbot-fuzzing-2023.8.5094.jar:?]
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33) ~[kotlin-stdlib-1.8.10.jar:1.8.10-release-430(1.8.10)]
	at kotlin.sequences.SequenceBuilderIterator.hasNext(SequenceBuilder.kt:129) ~[kotlin-stdlib-1.8.10.jar:1.8.10-release-430(1.8.10)]
	at kotlin.sequences.FlatteningSequence$iterator$1.ensureItemIterator(Sequences.kt:307) ~[kotlin-stdlib-1.8.10.jar:1.8.10-release-430(1.8.10)]
	at kotlin.sequences.FlatteningSequence$iterator$1.hasNext(Sequences.kt:303) ~[kotlin-stdlib-1.8.10.jar:1.8.10-release-430(1.8.10)]
	at kotlin.sequences.SequencesKt___SequencesKt.toCollection(_Sequences.kt:787) ~[kotlin-stdlib-1.8.10.jar:1.8.10-release-430(1.8.10)]
	at kotlin.sequences.SequencesKt___SequencesKt.toMutableList(_Sequences.kt:817) ~[kotlin-stdlib-1.8.10.jar:1.8.10-release-430(1.8.10)]
	at kotlin.sequences.SequencesKt___SequencesKt.toList(_Sequences.kt:808) ~[kotlin-stdlib-1.8.10.jar:1.8.10-release-430(1.8.10)]
	at org.utbot.fuzzing.FuzzingApi.produce(Api.kt:416) ~[utbot-fuzzing-2023.8.5094.jar:?]
	at org.utbot.fuzzing.FuzzingApi.fuzz(Api.kt:391) ~[utbot-fuzzing-2023.8.5094.jar:?]
	at org.utbot.fuzzing.FuzzingApi.fuzz$fuzzOne(Api.kt:323) ~[utbot-fuzzing-2023.8.5094.jar:?]
	at org.utbot.fuzzing.FuzzingApi.fuzz(Api.kt:342) ~[utbot-fuzzing-2023.8.5094.jar:?]
	at org.utbot.fuzzing.FuzzingApi.fuzz(Api.kt:306) ~[utbot-fuzzing-2023.8.5094.jar:?]
	at org.utbot.fuzzing.ProvidersKt.runFuzzing(Providers.kt:18) ~[utbot-fuzzing-2023.8.5094.jar:?]
	at org.utbot.fuzzing.JavaLanguageKt.runJavaFuzzing(JavaLanguage.kt:120) ~[utbot-java-fuzzing-2023.8.5094.jar:?]
	at org.utbot.engine.UtBotSymbolicEngine$fuzzing$2.invokeSuspend(UtBotSymbolicEngine.kt:451) ~[utbot-framework-2023.8.5094.jar:?]
	at org.utbot.engine.UtBotSymbolicEngine$fuzzing$2.invoke(UtBotSymbolicEngine.kt) ~[utbot-framework-2023.8.5094.jar:?]
	at org.utbot.engine.UtBotSymbolicEngine$fuzzing$2.invoke(UtBotSymbolicEngine.kt) ~[utbot-framework-2023.8.5094.jar:?]
	at kotlinx.coroutines.flow.SafeFlow.collectSafely(Builders.kt:61) ~[kotlinx-coroutines-core-jvm-1.6.3.jar:?]
	at kotlinx.coroutines.flow.AbstractFlow.collect(Flow.kt:230) ~[kotlinx-coroutines-core-jvm-1.6.3.jar:?]
	at kotlinx.coroutines.flow.FlowKt__ErrorsKt.catchImpl(Errors.kt:156) ~[kotlinx-coroutines-core-jvm-1.6.3.jar:?]
	at kotlinx.coroutines.flow.FlowKt.catchImpl(Unknown Source) ~[kotlinx-coroutines-core-jvm-1.6.3.jar:?]
	at kotlinx.coroutines.flow.FlowKt__ErrorsKt$catch$$inlined$unsafeFlow$1.collect(SafeCollector.common.kt:113) ~[kotlinx-coroutines-core-jvm-1.6.3.jar:?]
	at org.utbot.framework.plugin.api.TestCaseGenerator$generate$2$3$1$1.invokeSuspend(TestCaseGenerator.kt:222) ~[utbot-framework-2023.8.5094.jar:?]
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33) ~[kotlin-stdlib-1.8.10.jar:1.8.10-release-430(1.8.10)]
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106) ~[kotlinx-coroutines-core-jvm-1.6.3.jar:?]
	at kotlinx.coroutines.EventLoopImplBase.processNextEvent(EventLoop.common.kt:284) ~[kotlinx-coroutines-core-jvm-1.6.3.jar:?]
	at kotlinx.coroutines.BlockingCoroutine.joinBlocking(Builders.kt:85) ~[kotlinx-coroutines-core-jvm-1.6.3.jar:?]
	at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking(Builders.kt:59) ~[kotlinx-coroutines-core-jvm-1.6.3.jar:?]
	at kotlinx.coroutines.BuildersKt.runBlocking(Unknown Source) ~[kotlinx-coroutines-core-jvm-1.6.3.jar:?]
	at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking$default(Builders.kt:38) ~[kotlinx-coroutines-core-jvm-1.6.3.jar:?]
	at kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source) ~[kotlinx-coroutines-core-jvm-1.6.3.jar:?]
	at org.utbot.common.ConcurrencyKt.runBlockingWithCancellationPredicate(Concurrency.kt:38) ~[utbot-core-2023.8.5094.jar:?]
	at org.utbot.framework.plugin.api.TestCaseGenerator$generate$2$3.invoke(TestCaseGenerator.kt:196) ~[utbot-framework-2023.8.5094.jar:?]
	at org.utbot.framework.plugin.api.TestCaseGenerator$generate$2$3.invoke(TestCaseGenerator.kt:195) ~[utbot-framework-2023.8.5094.jar:?]
	at org.utbot.common.ConcurrencyKt.runIgnoringCancellationException(Concurrency.kt:47) ~[utbot-core-2023.8.5094.jar:?]
	at org.utbot.framework.plugin.api.TestCaseGenerator.generate(TestCaseGenerator.kt:195) ~[utbot-framework-2023.8.5094.jar:?]
	at org.utbot.framework.process.EngineProcessMainKt$setup$4.invoke(EngineProcessMain.kt:139) ~[utbot-framework-2023.8.5094.jar:?]
	at org.utbot.framework.process.EngineProcessMainKt$setup$4.invoke(EngineProcessMain.kt:124) ~[utbot-framework-2023.8.5094.jar:?]
	at org.utbot.rd.IdleWatchdog$measureTimeForActiveCall$1$2$1.invoke(ClientProcessUtil.kt:115) ~[utbot-rd-2023.8.5094.jar:?]
	at org.utbot.rd.IdleWatchdog.wrapActive(ClientProcessUtil.kt:88) ~[utbot-rd-2023.8.5094.jar:?]
	at org.utbot.rd.IdleWatchdog$measureTimeForActiveCall$1.invoke(ClientProcessUtil.kt:114) ~[utbot-rd-2023.8.5094.jar:?]
	at com.jetbrains.rd.framework.IRdEndpoint$set$1.invoke(TaskInterfaces.kt:182) ~[rd-framework-2023.1.2.jar:?]
	at com.jetbrains.rd.framework.IRdEndpoint$set$1.invoke(TaskInterfaces.kt:182) ~[rd-framework-2023.1.2.jar:?]
	at com.jetbrains.rd.framework.impl.RdCall.onWireReceived(RdTask.kt:362) ~[rd-framework-2023.1.2.jar:?]
	at com.jetbrains.rd.framework.MessageBroker$invoke$2$2.invoke(MessageBroker.kt:57) ~[rd-framework-2023.1.2.jar:?]
	at com.jetbrains.rd.framework.MessageBroker$invoke$2$2.invoke(MessageBroker.kt:56) ~[rd-framework-2023.1.2.jar:?]
	at com.jetbrains.rd.framework.impl.ProtocolContexts.readMessageContextAndInvoke(ProtocolContexts.kt:148) ~[rd-framework-2023.1.2.jar:?]
	at com.jetbrains.rd.framework.MessageBroker$invoke$2.invoke(MessageBroker.kt:56) ~[rd-framework-2023.1.2.jar:?]
	at com.jetbrains.rd.framework.MessageBroker$invoke$2.invoke(MessageBroker.kt:54) ~[rd-framework-2023.1.2.jar:?]
	at com.jetbrains.rd.util.threading.SingleThreadSchedulerBase.queue$lambda-3(SingleThreadScheduler.kt:41) ~[rd-core-2023.1.2.jar:?]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) [?:?]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) [?:?]
	at java.lang.Thread.run(Thread.java:833) [?:?]
13:35:54.179 | INFO  | Summarization             | Started: ----------------------------------------------------------------------------------------