./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 551b0097 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash aa34b6970b46b2c3f1bda76d086482188f10831dd44cba913e5171769601c6f3 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 03:17:43,293 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 03:17:43,357 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-09 03:17:43,362 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 03:17:43,362 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 03:17:43,382 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 03:17:43,383 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 03:17:43,383 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 03:17:43,384 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 03:17:43,384 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 03:17:43,384 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 03:17:43,384 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 03:17:43,384 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 03:17:43,384 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 03:17:43,385 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 03:17:43,385 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 03:17:43,385 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 03:17:43,385 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 03:17:43,385 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 03:17:43,385 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 03:17:43,385 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 03:17:43,385 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 03:17:43,386 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 03:17:43,386 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 03:17:43,386 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 03:17:43,386 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 03:17:43,386 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 03:17:43,386 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 03:17:43,386 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 03:17:43,386 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 03:17:43,386 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 03:17:43,387 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 03:17:43,387 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 03:17:43,387 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 03:17:43,387 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 03:17:43,387 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 03:17:43,387 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 03:17:43,387 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 03:17:43,387 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 03:17:43,387 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 03:17:43,387 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 03:17:43,387 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 03:17:43,387 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 03:17:43,387 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 03:17:43,387 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 03:17:43,387 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 03:17:43,387 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 03:17:43,387 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 03:17:43,388 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa34b6970b46b2c3f1bda76d086482188f10831dd44cba913e5171769601c6f3 [2025-01-09 03:17:43,649 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 03:17:43,655 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 03:17:43,657 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 03:17:43,657 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 03:17:43,658 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 03:17:43,658 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c [2025-01-09 03:17:44,932 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/84c138df8/377a63cd244645debd7419353e5ae2da/FLAGb4a54f02e [2025-01-09 03:17:44,951 ERROR L? ?]: Error during toolchain job processing: java.lang.NullPointerException: Cannot invoke "String.equalsIgnoreCase(String)" because "kindStr" is null at org.eclipse.cdt.internal.core.model.PathEntry.kindFromString(PathEntry.java:80) at org.eclipse.cdt.internal.core.model.DefaultPathEntryStore.decodePathEntry(DefaultPathEntryStore.java:127) at org.eclipse.cdt.internal.core.model.DefaultPathEntryStore.getRawPathEntries(DefaultPathEntryStore.java:97) at org.eclipse.cdt.internal.core.model.PathEntryStoreProxy.getRawPathEntries(PathEntryStoreProxy.java:102) at org.eclipse.cdt.internal.core.model.PathEntryManager.getRawPathEntries(PathEntryManager.java:666) at org.eclipse.cdt.core.model.CoreModel.getRawPathEntries(CoreModel.java:937) at org.eclipse.cdt.core.model.CoreModel.oldIsScannerInformationEmpty(CoreModel.java:1307) at org.eclipse.cdt.core.model.CoreModel.isScannerInformationEmpty(CoreModel.java:1252) at org.eclipse.cdt.internal.core.pdom.indexer.ProjectIndexerInputAdapter.isFileBuildConfigured(ProjectIndexerInputAdapter.java:267) at org.eclipse.cdt.internal.core.pdom.AbstractIndexerTask.isRequiredInIndex(AbstractIndexerTask.java:748) at org.eclipse.cdt.internal.core.pdom.AbstractIndexerTask.extractFiles(AbstractIndexerTask.java:667) at org.eclipse.cdt.internal.core.pdom.AbstractIndexerTask.runTask(AbstractIndexerTask.java:558) at org.eclipse.cdt.internal.core.pdom.indexer.PDOMIndexerTask.run(PDOMIndexerTask.java:164) at org.eclipse.cdt.internal.core.pdom.PDOMIndexerJob.run(PDOMIndexerJob.java:160) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2025-01-09 03:17:45,180 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 03:17:45,180 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c [2025-01-09 03:17:45,188 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/84c138df8/377a63cd244645debd7419353e5ae2da/FLAGb4a54f02e [2025-01-09 03:17:45,210 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/84c138df8/377a63cd244645debd7419353e5ae2da [2025-01-09 03:17:45,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 03:17:45,215 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 03:17:45,216 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 03:17:45,217 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 03:17:45,220 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 03:17:45,221 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 03:17:45" (1/1) ... [2025-01-09 03:17:45,222 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4753a3e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:17:45, skipping insertion in model container [2025-01-09 03:17:45,224 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 03:17:45" (1/1) ... [2025-01-09 03:17:45,237 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 03:17:45,362 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c[490,503] [2025-01-09 03:17:45,391 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 03:17:45,398 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 03:17:45,407 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c[490,503] [2025-01-09 03:17:45,420 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 03:17:45,436 INFO L204 MainTranslator]: Completed translation [2025-01-09 03:17:45,438 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:17:45 WrapperNode [2025-01-09 03:17:45,438 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 03:17:45,439 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 03:17:45,440 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 03:17:45,440 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 03:17:45,445 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:17:45" (1/1) ... [2025-01-09 03:17:45,450 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:17:45" (1/1) ... [2025-01-09 03:17:45,468 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 84 [2025-01-09 03:17:45,468 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 03:17:45,469 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 03:17:45,469 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 03:17:45,469 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 03:17:45,477 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:17:45" (1/1) ... [2025-01-09 03:17:45,477 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:17:45" (1/1) ... [2025-01-09 03:17:45,478 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:17:45" (1/1) ... [2025-01-09 03:17:45,490 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-01-09 03:17:45,492 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:17:45" (1/1) ... [2025-01-09 03:17:45,492 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:17:45" (1/1) ... [2025-01-09 03:17:45,495 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:17:45" (1/1) ... [2025-01-09 03:17:45,497 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:17:45" (1/1) ... [2025-01-09 03:17:45,500 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:17:45" (1/1) ... [2025-01-09 03:17:45,502 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:17:45" (1/1) ... [2025-01-09 03:17:45,502 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:17:45" (1/1) ... [2025-01-09 03:17:45,506 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 03:17:45,507 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 03:17:45,507 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 03:17:45,507 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 03:17:45,508 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:17:45" (1/1) ... [2025-01-09 03:17:45,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 03:17:45,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:17:45,535 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-01-09 03:17:45,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-01-09 03:17:45,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 03:17:45,556 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-01-09 03:17:45,556 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-01-09 03:17:45,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 03:17:45,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 03:17:45,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 03:17:45,557 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-01-09 03:17:45,557 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-01-09 03:17:45,604 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 03:17:45,606 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 03:17:45,747 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2025-01-09 03:17:45,748 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 03:17:45,755 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 03:17:45,756 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2025-01-09 03:17:45,756 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 03:17:45 BoogieIcfgContainer [2025-01-09 03:17:45,757 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 03:17:45,758 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 03:17:45,758 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 03:17:45,762 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 03:17:45,762 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 03:17:45" (1/3) ... [2025-01-09 03:17:45,763 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65731e41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 03:17:45, skipping insertion in model container [2025-01-09 03:17:45,763 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:17:45" (2/3) ... [2025-01-09 03:17:45,764 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65731e41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 03:17:45, skipping insertion in model container [2025-01-09 03:17:45,764 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 03:17:45" (3/3) ... [2025-01-09 03:17:45,765 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound10.c [2025-01-09 03:17:45,778 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 03:17:45,779 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd2-ll_unwindbound10.c that has 3 procedures, 34 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-01-09 03:17:45,830 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 03:17:45,840 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2052f232, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 03:17:45,840 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-09 03:17:45,844 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-01-09 03:17:45,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-01-09 03:17:45,849 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:17:45,850 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:17:45,850 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:17:45,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:17:45,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1022199732, now seen corresponding path program 1 times [2025-01-09 03:17:45,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:17:45,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531153995] [2025-01-09 03:17:45,864 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:17:45,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:17:45,945 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-01-09 03:17:45,960 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-01-09 03:17:45,961 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:17:45,961 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:17:46,024 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-01-09 03:17:46,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:17:46,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531153995] [2025-01-09 03:17:46,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531153995] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:17:46,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395374954] [2025-01-09 03:17:46,027 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:17:46,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:17:46,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:17:46,031 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:17:46,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-01-09 03:17:46,081 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-01-09 03:17:46,113 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-01-09 03:17:46,114 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:17:46,114 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:17:46,118 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-01-09 03:17:46,122 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:17:46,134 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-01-09 03:17:46,136 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 03:17:46,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395374954] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:17:46,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 03:17:46,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-01-09 03:17:46,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528994075] [2025-01-09 03:17:46,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:17:46,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-01-09 03:17:46,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:17:46,159 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-01-09 03:17:46,160 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-09 03:17:46,161 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2025-01-09 03:17:46,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:17:46,183 INFO L93 Difference]: Finished difference Result 65 states and 104 transitions. [2025-01-09 03:17:46,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-09 03:17:46,185 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2025-01-09 03:17:46,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:17:46,190 INFO L225 Difference]: With dead ends: 65 [2025-01-09 03:17:46,191 INFO L226 Difference]: Without dead ends: 30 [2025-01-09 03:17:46,194 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-09 03:17:46,197 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:17:46,198 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:17:46,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-01-09 03:17:46,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2025-01-09 03:17:46,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2025-01-09 03:17:46,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2025-01-09 03:17:46,232 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 28 [2025-01-09 03:17:46,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:17:46,234 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2025-01-09 03:17:46,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2025-01-09 03:17:46,234 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2025-01-09 03:17:46,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-01-09 03:17:46,235 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:17:46,235 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:17:46,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-09 03:17:46,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-01-09 03:17:46,440 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:17:46,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:17:46,441 INFO L85 PathProgramCache]: Analyzing trace with hash -482926610, now seen corresponding path program 1 times [2025-01-09 03:17:46,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:17:46,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852908461] [2025-01-09 03:17:46,441 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:17:46,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:17:46,453 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-01-09 03:17:46,475 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-01-09 03:17:46,476 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:17:46,476 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:17:46,588 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-01-09 03:17:46,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:17:46,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852908461] [2025-01-09 03:17:46,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852908461] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:17:46,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:17:46,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-09 03:17:46,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966372129] [2025-01-09 03:17:46,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:17:46,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 03:17:46,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:17:46,591 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 03:17:46,591 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 03:17:46,591 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-01-09 03:17:46,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:17:46,619 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2025-01-09 03:17:46,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 03:17:46,620 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2025-01-09 03:17:46,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:17:46,621 INFO L225 Difference]: With dead ends: 40 [2025-01-09 03:17:46,621 INFO L226 Difference]: Without dead ends: 32 [2025-01-09 03:17:46,622 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 03:17:46,622 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:17:46,622 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 100 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:17:46,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-01-09 03:17:46,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2025-01-09 03:17:46,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2025-01-09 03:17:46,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2025-01-09 03:17:46,635 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 29 [2025-01-09 03:17:46,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:17:46,636 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2025-01-09 03:17:46,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-01-09 03:17:46,637 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2025-01-09 03:17:46,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-01-09 03:17:46,638 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:17:46,638 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:17:46,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-09 03:17:46,638 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:17:46,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:17:46,639 INFO L85 PathProgramCache]: Analyzing trace with hash 2088040982, now seen corresponding path program 1 times [2025-01-09 03:17:46,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:17:46,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734945425] [2025-01-09 03:17:46,639 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:17:46,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:17:46,651 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-01-09 03:17:46,665 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-01-09 03:17:46,665 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:17:46,665 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:17:46,838 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-01-09 03:17:46,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:17:46,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734945425] [2025-01-09 03:17:46,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734945425] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:17:46,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263842226] [2025-01-09 03:17:46,839 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:17:46,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:17:46,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:17:46,842 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:17:46,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-01-09 03:17:46,882 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-01-09 03:17:46,908 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-01-09 03:17:46,908 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:17:46,908 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:17:46,909 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-01-09 03:17:46,913 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:17:47,099 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-01-09 03:17:47,099 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 03:17:47,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263842226] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:17:47,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 03:17:47,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2025-01-09 03:17:47,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160610407] [2025-01-09 03:17:47,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:17:47,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-09 03:17:47,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:17:47,100 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-09 03:17:47,100 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2025-01-09 03:17:47,100 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-01-09 03:17:47,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:17:47,215 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2025-01-09 03:17:47,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 03:17:47,215 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2025-01-09 03:17:47,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:17:47,216 INFO L225 Difference]: With dead ends: 49 [2025-01-09 03:17:47,216 INFO L226 Difference]: Without dead ends: 47 [2025-01-09 03:17:47,216 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2025-01-09 03:17:47,217 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 9 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:17:47,217 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 146 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:17:47,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2025-01-09 03:17:47,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2025-01-09 03:17:47,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 28 states have internal predecessors, (34), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-01-09 03:17:47,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 63 transitions. [2025-01-09 03:17:47,233 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 63 transitions. Word has length 30 [2025-01-09 03:17:47,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:17:47,233 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 63 transitions. [2025-01-09 03:17:47,233 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-01-09 03:17:47,233 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 63 transitions. [2025-01-09 03:17:47,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-01-09 03:17:47,234 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:17:47,234 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:17:47,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-01-09 03:17:47,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:17:47,435 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:17:47,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:17:47,436 INFO L85 PathProgramCache]: Analyzing trace with hash 769472419, now seen corresponding path program 1 times [2025-01-09 03:17:47,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:17:47,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088119688] [2025-01-09 03:17:47,436 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:17:47,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:17:47,443 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-01-09 03:17:47,457 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-01-09 03:17:47,457 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:17:47,457 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:17:47,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [666370339] [2025-01-09 03:17:47,461 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:17:47,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:17:47,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:17:47,463 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:17:47,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-01-09 03:17:47,495 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-01-09 03:17:47,512 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-01-09 03:17:47,513 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:17:47,513 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:17:47,513 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-01-09 03:17:47,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:17:47,562 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-01-09 03:17:47,562 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 03:17:47,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:17:47,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088119688] [2025-01-09 03:17:47,563 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:17:47,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666370339] [2025-01-09 03:17:47,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666370339] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:17:47,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:17:47,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 03:17:47,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807250528] [2025-01-09 03:17:47,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:17:47,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 03:17:47,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:17:47,564 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 03:17:47,564 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-09 03:17:47,564 INFO L87 Difference]: Start difference. First operand 45 states and 63 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-01-09 03:17:47,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:17:47,611 INFO L93 Difference]: Finished difference Result 66 states and 95 transitions. [2025-01-09 03:17:47,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 03:17:47,611 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2025-01-09 03:17:47,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:17:47,613 INFO L225 Difference]: With dead ends: 66 [2025-01-09 03:17:47,613 INFO L226 Difference]: Without dead ends: 64 [2025-01-09 03:17:47,614 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-01-09 03:17:47,614 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:17:47,614 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 139 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:17:47,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-01-09 03:17:47,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2025-01-09 03:17:47,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.303030303030303) internal successors, (43), 37 states have internal predecessors, (43), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2025-01-09 03:17:47,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 76 transitions. [2025-01-09 03:17:47,632 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 76 transitions. Word has length 32 [2025-01-09 03:17:47,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:17:47,633 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 76 transitions. [2025-01-09 03:17:47,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-01-09 03:17:47,633 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 76 transitions. [2025-01-09 03:17:47,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-01-09 03:17:47,633 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:17:47,634 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:17:47,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-01-09 03:17:47,834 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:17:47,834 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:17:47,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:17:47,835 INFO L85 PathProgramCache]: Analyzing trace with hash 55994570, now seen corresponding path program 1 times [2025-01-09 03:17:47,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:17:47,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71969814] [2025-01-09 03:17:47,835 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:17:47,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:17:47,841 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-01-09 03:17:47,852 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-01-09 03:17:47,852 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:17:47,852 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:17:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-01-09 03:17:47,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:17:47,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71969814] [2025-01-09 03:17:47,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71969814] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:17:47,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658957434] [2025-01-09 03:17:47,962 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:17:47,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:17:47,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:17:47,964 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:17:47,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-01-09 03:17:47,997 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-01-09 03:17:48,013 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-01-09 03:17:48,013 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:17:48,013 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:17:48,015 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-01-09 03:17:48,016 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:17:48,133 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-01-09 03:17:48,133 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 03:17:48,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658957434] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:17:48,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 03:17:48,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2025-01-09 03:17:48,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706887972] [2025-01-09 03:17:48,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:17:48,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 03:17:48,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:17:48,134 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 03:17:48,134 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2025-01-09 03:17:48,135 INFO L87 Difference]: Start difference. First operand 55 states and 76 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-01-09 03:17:48,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:17:48,192 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2025-01-09 03:17:48,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 03:17:48,194 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2025-01-09 03:17:48,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:17:48,194 INFO L225 Difference]: With dead ends: 63 [2025-01-09 03:17:48,194 INFO L226 Difference]: Without dead ends: 59 [2025-01-09 03:17:48,195 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2025-01-09 03:17:48,195 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:17:48,195 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 142 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:17:48,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-01-09 03:17:48,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2025-01-09 03:17:48,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.25) internal successors, (45), 39 states have internal predecessors, (45), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2025-01-09 03:17:48,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2025-01-09 03:17:48,209 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 35 [2025-01-09 03:17:48,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:17:48,209 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2025-01-09 03:17:48,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-01-09 03:17:48,209 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2025-01-09 03:17:48,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-01-09 03:17:48,210 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:17:48,210 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:17:48,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-01-09 03:17:48,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:17:48,411 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:17:48,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:17:48,411 INFO L85 PathProgramCache]: Analyzing trace with hash 290957379, now seen corresponding path program 1 times [2025-01-09 03:17:48,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:17:48,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841756783] [2025-01-09 03:17:48,412 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:17:48,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:17:48,418 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-01-09 03:17:48,423 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-01-09 03:17:48,424 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:17:48,424 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:17:48,467 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-01-09 03:17:48,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:17:48,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841756783] [2025-01-09 03:17:48,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841756783] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:17:48,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:17:48,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 03:17:48,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583626138] [2025-01-09 03:17:48,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:17:48,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 03:17:48,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:17:48,468 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 03:17:48,468 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-09 03:17:48,468 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-01-09 03:17:48,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:17:48,496 INFO L93 Difference]: Finished difference Result 84 states and 111 transitions. [2025-01-09 03:17:48,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 03:17:48,497 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2025-01-09 03:17:48,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:17:48,498 INFO L225 Difference]: With dead ends: 84 [2025-01-09 03:17:48,498 INFO L226 Difference]: Without dead ends: 58 [2025-01-09 03:17:48,499 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-09 03:17:48,499 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:17:48,499 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 100 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:17:48,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-01-09 03:17:48,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2025-01-09 03:17:48,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 39 states have internal predecessors, (44), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2025-01-09 03:17:48,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 75 transitions. [2025-01-09 03:17:48,515 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 75 transitions. Word has length 35 [2025-01-09 03:17:48,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:17:48,515 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 75 transitions. [2025-01-09 03:17:48,515 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-01-09 03:17:48,515 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 75 transitions. [2025-01-09 03:17:48,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-01-09 03:17:48,518 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:17:48,519 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:17:48,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-01-09 03:17:48,519 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:17:48,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:17:48,520 INFO L85 PathProgramCache]: Analyzing trace with hash -536481827, now seen corresponding path program 1 times [2025-01-09 03:17:48,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:17:48,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334818452] [2025-01-09 03:17:48,520 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:17:48,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:17:48,530 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-01-09 03:17:48,543 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-01-09 03:17:48,545 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:17:48,545 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:17:48,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [660028796] [2025-01-09 03:17:48,547 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:17:48,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:17:48,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:17:48,549 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:17:48,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-01-09 03:17:48,578 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-01-09 03:17:48,597 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-01-09 03:17:48,597 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:17:48,597 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:17:48,600 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-01-09 03:17:48,602 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:17:48,754 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-01-09 03:17:48,754 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 03:17:48,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:17:48,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334818452] [2025-01-09 03:17:48,757 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:17:48,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660028796] [2025-01-09 03:17:48,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660028796] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:17:48,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:17:48,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 03:17:48,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406445892] [2025-01-09 03:17:48,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:17:48,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 03:17:48,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:17:48,760 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 03:17:48,760 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-09 03:17:48,760 INFO L87 Difference]: Start difference. First operand 58 states and 75 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-01-09 03:17:48,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:17:48,816 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2025-01-09 03:17:48,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 03:17:48,816 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2025-01-09 03:17:48,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:17:48,817 INFO L225 Difference]: With dead ends: 65 [2025-01-09 03:17:48,817 INFO L226 Difference]: Without dead ends: 63 [2025-01-09 03:17:48,818 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-01-09 03:17:48,818 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:17:48,819 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 130 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:17:48,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2025-01-09 03:17:48,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2025-01-09 03:17:48,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 39 states have (on average 1.205128205128205) internal successors, (47), 42 states have internal predecessors, (47), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2025-01-09 03:17:48,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2025-01-09 03:17:48,829 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 47 [2025-01-09 03:17:48,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:17:48,829 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2025-01-09 03:17:48,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-01-09 03:17:48,829 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2025-01-09 03:17:48,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-01-09 03:17:48,830 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:17:48,830 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:17:48,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-01-09 03:17:49,030 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:17:49,031 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:17:49,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:17:49,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1556422495, now seen corresponding path program 1 times [2025-01-09 03:17:49,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:17:49,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929363274] [2025-01-09 03:17:49,032 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:17:49,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:17:49,041 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-01-09 03:17:49,062 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-01-09 03:17:49,063 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:17:49,063 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:17:49,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1123106013] [2025-01-09 03:17:49,066 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:17:49,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:17:49,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:17:49,070 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:17:49,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-01-09 03:17:49,104 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-01-09 03:17:49,129 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-01-09 03:17:49,129 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:17:49,129 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:17:49,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-01-09 03:17:49,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:17:49,239 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-01-09 03:17:49,240 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:17:49,346 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2025-01-09 03:17:49,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:17:49,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929363274] [2025-01-09 03:17:49,346 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:17:49,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123106013] [2025-01-09 03:17:49,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123106013] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-09 03:17:49,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 03:17:49,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2025-01-09 03:17:49,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166293938] [2025-01-09 03:17:49,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:17:49,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 03:17:49,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:17:49,351 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 03:17:49,351 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-01-09 03:17:49,351 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-01-09 03:17:49,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:17:49,403 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2025-01-09 03:17:49,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 03:17:49,404 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 55 [2025-01-09 03:17:49,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:17:49,406 INFO L225 Difference]: With dead ends: 68 [2025-01-09 03:17:49,406 INFO L226 Difference]: Without dead ends: 66 [2025-01-09 03:17:49,406 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-01-09 03:17:49,408 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 5 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:17:49,408 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 124 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:17:49,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2025-01-09 03:17:49,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2025-01-09 03:17:49,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 38 states have internal predecessors, (44), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-01-09 03:17:49,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2025-01-09 03:17:49,425 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 55 [2025-01-09 03:17:49,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:17:49,425 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2025-01-09 03:17:49,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-01-09 03:17:49,425 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2025-01-09 03:17:49,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2025-01-09 03:17:49,426 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:17:49,426 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:17:49,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-01-09 03:17:49,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-01-09 03:17:49,627 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:17:49,627 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:17:49,627 INFO L85 PathProgramCache]: Analyzing trace with hash 921028846, now seen corresponding path program 1 times [2025-01-09 03:17:49,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:17:49,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677842148] [2025-01-09 03:17:49,627 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:17:49,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:17:49,634 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 56 statements into 1 equivalence classes. [2025-01-09 03:17:49,644 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 56 of 56 statements. [2025-01-09 03:17:49,646 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:17:49,646 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:17:49,756 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-01-09 03:17:49,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:17:49,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677842148] [2025-01-09 03:17:49,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677842148] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:17:49,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878633531] [2025-01-09 03:17:49,757 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:17:49,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:17:49,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:17:49,760 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:17:49,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-01-09 03:17:49,791 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 56 statements into 1 equivalence classes. [2025-01-09 03:17:49,811 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 56 of 56 statements. [2025-01-09 03:17:49,812 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:17:49,812 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:17:49,813 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-01-09 03:17:49,814 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:17:49,884 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-01-09 03:17:49,884 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:17:49,973 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-01-09 03:17:49,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878633531] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:17:49,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:17:49,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2025-01-09 03:17:49,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83103661] [2025-01-09 03:17:49,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:17:49,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-09 03:17:49,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:17:49,975 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-09 03:17:49,975 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2025-01-09 03:17:49,975 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2025-01-09 03:17:50,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:17:50,170 INFO L93 Difference]: Finished difference Result 211 states and 250 transitions. [2025-01-09 03:17:50,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-01-09 03:17:50,171 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 56 [2025-01-09 03:17:50,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:17:50,174 INFO L225 Difference]: With dead ends: 211 [2025-01-09 03:17:50,174 INFO L226 Difference]: Without dead ends: 203 [2025-01-09 03:17:50,174 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2025-01-09 03:17:50,174 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 72 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:17:50,175 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 151 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:17:50,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2025-01-09 03:17:50,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 195. [2025-01-09 03:17:50,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 125 states have (on average 1.192) internal successors, (149), 129 states have internal predecessors, (149), 44 states have call successors, (44), 25 states have call predecessors, (44), 25 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2025-01-09 03:17:50,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 233 transitions. [2025-01-09 03:17:50,219 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 233 transitions. Word has length 56 [2025-01-09 03:17:50,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:17:50,220 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 233 transitions. [2025-01-09 03:17:50,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2025-01-09 03:17:50,220 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 233 transitions. [2025-01-09 03:17:50,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-01-09 03:17:50,223 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:17:50,224 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:17:50,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-01-09 03:17:50,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:17:50,424 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:17:50,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:17:50,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1633980138, now seen corresponding path program 1 times [2025-01-09 03:17:50,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:17:50,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54606140] [2025-01-09 03:17:50,425 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:17:50,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:17:50,430 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 57 statements into 1 equivalence classes. [2025-01-09 03:17:50,438 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 57 of 57 statements. [2025-01-09 03:17:50,439 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:17:50,439 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:17:50,559 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-01-09 03:17:50,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:17:50,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54606140] [2025-01-09 03:17:50,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54606140] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:17:50,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298824313] [2025-01-09 03:17:50,560 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:17:50,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:17:50,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:17:50,562 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:17:50,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-01-09 03:17:50,597 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 57 statements into 1 equivalence classes. [2025-01-09 03:17:50,619 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 57 of 57 statements. [2025-01-09 03:17:50,620 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:17:50,620 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:17:50,621 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-01-09 03:17:50,622 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:17:50,664 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-01-09 03:17:50,664 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:17:50,758 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-01-09 03:17:50,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298824313] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:17:50,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:17:50,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2025-01-09 03:17:50,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091492460] [2025-01-09 03:17:50,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:17:50,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-01-09 03:17:50,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:17:50,760 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-01-09 03:17:50,760 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-01-09 03:17:50,760 INFO L87 Difference]: Start difference. First operand 195 states and 233 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2025-01-09 03:17:50,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:17:50,954 INFO L93 Difference]: Finished difference Result 279 states and 364 transitions. [2025-01-09 03:17:50,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-09 03:17:50,954 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 57 [2025-01-09 03:17:50,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:17:50,956 INFO L225 Difference]: With dead ends: 279 [2025-01-09 03:17:50,956 INFO L226 Difference]: Without dead ends: 259 [2025-01-09 03:17:50,957 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 109 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2025-01-09 03:17:50,957 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 60 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:17:50,958 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 249 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:17:50,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2025-01-09 03:17:50,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 235. [2025-01-09 03:17:50,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 152 states have (on average 1.2236842105263157) internal successors, (186), 155 states have internal predecessors, (186), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2025-01-09 03:17:50,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 299 transitions. [2025-01-09 03:17:51,000 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 299 transitions. Word has length 57 [2025-01-09 03:17:51,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:17:51,000 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 299 transitions. [2025-01-09 03:17:51,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2025-01-09 03:17:51,001 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 299 transitions. [2025-01-09 03:17:51,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2025-01-09 03:17:51,003 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:17:51,003 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:17:51,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-01-09 03:17:51,204 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:17:51,204 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:17:51,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:17:51,205 INFO L85 PathProgramCache]: Analyzing trace with hash 928720413, now seen corresponding path program 1 times [2025-01-09 03:17:51,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:17:51,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109521864] [2025-01-09 03:17:51,205 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:17:51,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:17:51,210 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-01-09 03:17:51,216 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-01-09 03:17:51,216 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:17:51,216 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:17:51,289 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-01-09 03:17:51,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:17:51,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109521864] [2025-01-09 03:17:51,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109521864] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:17:51,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365226286] [2025-01-09 03:17:51,290 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:17:51,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:17:51,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:17:51,292 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:17:51,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-01-09 03:17:51,322 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-01-09 03:17:51,341 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-01-09 03:17:51,341 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:17:51,341 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:17:51,342 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-01-09 03:17:51,344 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:17:51,405 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-01-09 03:17:51,405 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:17:51,484 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-01-09 03:17:51,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365226286] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:17:51,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:17:51,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2025-01-09 03:17:51,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327223209] [2025-01-09 03:17:51,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:17:51,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-09 03:17:51,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:17:51,485 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-09 03:17:51,485 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2025-01-09 03:17:51,486 INFO L87 Difference]: Start difference. First operand 235 states and 299 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2025-01-09 03:17:51,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:17:51,676 INFO L93 Difference]: Finished difference Result 344 states and 448 transitions. [2025-01-09 03:17:51,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-01-09 03:17:51,676 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 59 [2025-01-09 03:17:51,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:17:51,681 INFO L225 Difference]: With dead ends: 344 [2025-01-09 03:17:51,681 INFO L226 Difference]: Without dead ends: 248 [2025-01-09 03:17:51,682 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2025-01-09 03:17:51,684 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 79 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:17:51,684 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 175 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:17:51,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2025-01-09 03:17:51,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2025-01-09 03:17:51,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 161 states have (on average 1.173913043478261) internal successors, (189), 164 states have internal predecessors, (189), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2025-01-09 03:17:51,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 302 transitions. [2025-01-09 03:17:51,719 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 302 transitions. Word has length 59 [2025-01-09 03:17:51,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:17:51,720 INFO L471 AbstractCegarLoop]: Abstraction has 244 states and 302 transitions. [2025-01-09 03:17:51,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2025-01-09 03:17:51,720 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 302 transitions. [2025-01-09 03:17:51,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2025-01-09 03:17:51,720 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:17:51,721 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:17:51,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-01-09 03:17:51,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:17:51,921 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:17:51,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:17:51,922 INFO L85 PathProgramCache]: Analyzing trace with hash -307698339, now seen corresponding path program 1 times [2025-01-09 03:17:51,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:17:51,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766102096] [2025-01-09 03:17:51,922 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:17:51,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:17:51,927 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 64 statements into 1 equivalence classes. [2025-01-09 03:17:51,937 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 64 of 64 statements. [2025-01-09 03:17:51,937 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:17:51,937 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:17:51,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2016466374] [2025-01-09 03:17:51,938 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:17:51,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:17:51,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:17:51,940 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:17:51,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-01-09 03:17:51,972 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 64 statements into 1 equivalence classes. [2025-01-09 03:17:51,996 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 64 of 64 statements. [2025-01-09 03:17:51,996 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:17:51,996 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:17:51,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-01-09 03:17:51,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:17:52,255 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2025-01-09 03:17:52,256 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:17:52,388 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2025-01-09 03:17:52,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:17:52,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766102096] [2025-01-09 03:17:52,389 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:17:52,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016466374] [2025-01-09 03:17:52,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016466374] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:17:52,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 03:17:52,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 12 [2025-01-09 03:17:52,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595533979] [2025-01-09 03:17:52,389 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 03:17:52,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-09 03:17:52,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:17:52,390 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-09 03:17:52,390 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2025-01-09 03:17:52,390 INFO L87 Difference]: Start difference. First operand 244 states and 302 transitions. Second operand has 12 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 9 states have internal predecessors, (40), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2025-01-09 03:17:52,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:17:52,589 INFO L93 Difference]: Finished difference Result 283 states and 355 transitions. [2025-01-09 03:17:52,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-09 03:17:52,590 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 9 states have internal predecessors, (40), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 64 [2025-01-09 03:17:52,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:17:52,592 INFO L225 Difference]: With dead ends: 283 [2025-01-09 03:17:52,592 INFO L226 Difference]: Without dead ends: 278 [2025-01-09 03:17:52,593 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2025-01-09 03:17:52,593 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 38 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:17:52,596 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 329 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:17:52,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2025-01-09 03:17:52,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 276. [2025-01-09 03:17:52,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 183 states have (on average 1.185792349726776) internal successors, (217), 187 states have internal predecessors, (217), 65 states have call successors, (65), 27 states have call predecessors, (65), 27 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2025-01-09 03:17:52,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 343 transitions. [2025-01-09 03:17:52,627 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 343 transitions. Word has length 64 [2025-01-09 03:17:52,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:17:52,628 INFO L471 AbstractCegarLoop]: Abstraction has 276 states and 343 transitions. [2025-01-09 03:17:52,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 9 states have internal predecessors, (40), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2025-01-09 03:17:52,628 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 343 transitions. [2025-01-09 03:17:52,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2025-01-09 03:17:52,629 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:17:52,629 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:17:52,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-01-09 03:17:52,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-01-09 03:17:52,833 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:17:52,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:17:52,833 INFO L85 PathProgramCache]: Analyzing trace with hash -710006109, now seen corresponding path program 2 times [2025-01-09 03:17:52,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:17:52,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305512540] [2025-01-09 03:17:52,834 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:17:52,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:17:52,839 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 69 statements into 2 equivalence classes. [2025-01-09 03:17:52,854 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 69 of 69 statements. [2025-01-09 03:17:52,856 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:17:52,856 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:17:52,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [811132446] [2025-01-09 03:17:52,857 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:17:52,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:17:52,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:17:52,859 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:17:52,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-01-09 03:17:52,892 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 69 statements into 2 equivalence classes. [2025-01-09 03:17:52,914 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 69 of 69 statements. [2025-01-09 03:17:52,914 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:17:52,914 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:17:52,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-01-09 03:17:52,917 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:17:53,363 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-01-09 03:17:53,363 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:17:53,622 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-01-09 03:17:53,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:17:53,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305512540] [2025-01-09 03:17:53,622 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:17:53,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811132446] [2025-01-09 03:17:53,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811132446] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:17:53,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 03:17:53,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2025-01-09 03:17:53,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894942367] [2025-01-09 03:17:53,623 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 03:17:53,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-01-09 03:17:53,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:17:53,624 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-01-09 03:17:53,624 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2025-01-09 03:17:53,625 INFO L87 Difference]: Start difference. First operand 276 states and 343 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 13 states have internal predecessors, (40), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2025-01-09 03:17:54,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:17:54,496 INFO L93 Difference]: Finished difference Result 440 states and 595 transitions. [2025-01-09 03:17:54,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-01-09 03:17:54,496 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 13 states have internal predecessors, (40), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 69 [2025-01-09 03:17:54,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:17:54,499 INFO L225 Difference]: With dead ends: 440 [2025-01-09 03:17:54,499 INFO L226 Difference]: Without dead ends: 438 [2025-01-09 03:17:54,500 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2025-01-09 03:17:54,500 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 104 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-09 03:17:54,501 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 400 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-09 03:17:54,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2025-01-09 03:17:54,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 393. [2025-01-09 03:17:54,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 258 states have (on average 1.244186046511628) internal successors, (321), 262 states have internal predecessors, (321), 101 states have call successors, (101), 33 states have call predecessors, (101), 33 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2025-01-09 03:17:54,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 519 transitions. [2025-01-09 03:17:54,563 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 519 transitions. Word has length 69 [2025-01-09 03:17:54,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:17:54,563 INFO L471 AbstractCegarLoop]: Abstraction has 393 states and 519 transitions. [2025-01-09 03:17:54,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 13 states have internal predecessors, (40), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2025-01-09 03:17:54,564 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 519 transitions. [2025-01-09 03:17:54,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2025-01-09 03:17:54,564 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:17:54,565 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:17:54,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-01-09 03:17:54,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-01-09 03:17:54,765 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:17:54,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:17:54,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1589401821, now seen corresponding path program 3 times [2025-01-09 03:17:54,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:17:54,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322585763] [2025-01-09 03:17:54,766 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 03:17:54,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:17:54,771 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 74 statements into 5 equivalence classes. [2025-01-09 03:17:54,797 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 74 of 74 statements. [2025-01-09 03:17:54,797 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-01-09 03:17:54,797 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:17:54,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [764814554] [2025-01-09 03:17:54,798 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 03:17:54,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:17:54,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:17:54,801 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:17:54,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-01-09 03:17:54,837 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 74 statements into 5 equivalence classes. [2025-01-09 03:17:54,864 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 54 of 74 statements. [2025-01-09 03:17:54,864 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-01-09 03:17:54,864 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:17:54,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-01-09 03:17:54,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:17:55,649 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 37 proven. 16 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2025-01-09 03:17:55,649 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:17:55,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:17:55,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322585763] [2025-01-09 03:17:55,766 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:17:55,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764814554] [2025-01-09 03:17:55,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764814554] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:17:55,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-09 03:17:55,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2025-01-09 03:17:55,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964528943] [2025-01-09 03:17:55,766 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-09 03:17:55,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-01-09 03:17:55,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:17:55,767 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-01-09 03:17:55,767 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2025-01-09 03:17:55,767 INFO L87 Difference]: Start difference. First operand 393 states and 519 transitions. Second operand has 15 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2025-01-09 03:17:56,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:17:56,229 INFO L93 Difference]: Finished difference Result 416 states and 539 transitions. [2025-01-09 03:17:56,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-01-09 03:17:56,229 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) Word has length 74 [2025-01-09 03:17:56,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:17:56,232 INFO L225 Difference]: With dead ends: 416 [2025-01-09 03:17:56,232 INFO L226 Difference]: Without dead ends: 412 [2025-01-09 03:17:56,232 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2025-01-09 03:17:56,233 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 48 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-09 03:17:56,233 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 291 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-09 03:17:56,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2025-01-09 03:17:56,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 411. [2025-01-09 03:17:56,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 272 states have (on average 1.2279411764705883) internal successors, (334), 275 states have internal predecessors, (334), 101 states have call successors, (101), 38 states have call predecessors, (101), 37 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2025-01-09 03:17:56,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 532 transitions. [2025-01-09 03:17:56,303 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 532 transitions. Word has length 74 [2025-01-09 03:17:56,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:17:56,304 INFO L471 AbstractCegarLoop]: Abstraction has 411 states and 532 transitions. [2025-01-09 03:17:56,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2025-01-09 03:17:56,305 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 532 transitions. [2025-01-09 03:17:56,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2025-01-09 03:17:56,306 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:17:56,306 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:17:56,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-01-09 03:17:56,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:17:56,507 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:17:56,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:17:56,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1490127654, now seen corresponding path program 1 times [2025-01-09 03:17:56,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:17:56,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924862561] [2025-01-09 03:17:56,507 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:17:56,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:17:56,512 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 80 statements into 1 equivalence classes. [2025-01-09 03:17:56,525 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 80 of 80 statements. [2025-01-09 03:17:56,525 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:17:56,526 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:17:56,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [339128463] [2025-01-09 03:17:56,527 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:17:56,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:17:56,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:17:56,529 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:17:56,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-01-09 03:17:56,577 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 80 statements into 1 equivalence classes. [2025-01-09 03:17:56,603 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 80 of 80 statements. [2025-01-09 03:17:56,604 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:17:56,604 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:17:56,607 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-01-09 03:17:56,610 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:17:57,103 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2025-01-09 03:17:57,104 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:17:57,462 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2025-01-09 03:17:57,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:17:57,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924862561] [2025-01-09 03:17:57,463 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:17:57,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339128463] [2025-01-09 03:17:57,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339128463] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:17:57,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 03:17:57,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2025-01-09 03:17:57,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967679595] [2025-01-09 03:17:57,464 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 03:17:57,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-01-09 03:17:57,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:17:57,465 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-01-09 03:17:57,465 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2025-01-09 03:17:57,465 INFO L87 Difference]: Start difference. First operand 411 states and 532 transitions. Second operand has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2025-01-09 03:17:59,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:17:59,215 INFO L93 Difference]: Finished difference Result 608 states and 851 transitions. [2025-01-09 03:17:59,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-01-09 03:17:59,216 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 80 [2025-01-09 03:17:59,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:17:59,219 INFO L225 Difference]: With dead ends: 608 [2025-01-09 03:17:59,219 INFO L226 Difference]: Without dead ends: 597 [2025-01-09 03:17:59,220 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=296, Invalid=1264, Unknown=0, NotChecked=0, Total=1560 [2025-01-09 03:17:59,221 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 133 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-01-09 03:17:59,221 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 658 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-01-09 03:17:59,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2025-01-09 03:17:59,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 553. [2025-01-09 03:17:59,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 357 states have (on average 1.2969187675070029) internal successors, (463), 360 states have internal predecessors, (463), 156 states have call successors, (156), 39 states have call predecessors, (156), 39 states have return successors, (154), 153 states have call predecessors, (154), 154 states have call successors, (154) [2025-01-09 03:17:59,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 773 transitions. [2025-01-09 03:17:59,340 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 773 transitions. Word has length 80 [2025-01-09 03:17:59,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:17:59,340 INFO L471 AbstractCegarLoop]: Abstraction has 553 states and 773 transitions. [2025-01-09 03:17:59,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2025-01-09 03:17:59,341 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 773 transitions. [2025-01-09 03:17:59,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2025-01-09 03:17:59,341 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:17:59,342 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:17:59,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-01-09 03:17:59,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:17:59,546 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:17:59,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:17:59,547 INFO L85 PathProgramCache]: Analyzing trace with hash -948855715, now seen corresponding path program 4 times [2025-01-09 03:17:59,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:17:59,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370207850] [2025-01-09 03:17:59,547 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 03:17:59,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:17:59,555 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 91 statements into 2 equivalence classes. [2025-01-09 03:17:59,560 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 87 of 91 statements. [2025-01-09 03:17:59,564 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-09 03:17:59,565 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:17:59,627 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2025-01-09 03:17:59,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:17:59,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370207850] [2025-01-09 03:17:59,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370207850] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:17:59,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:17:59,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 03:17:59,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848456192] [2025-01-09 03:17:59,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:17:59,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 03:17:59,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:17:59,629 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 03:17:59,629 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-09 03:17:59,630 INFO L87 Difference]: Start difference. First operand 553 states and 773 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2025-01-09 03:17:59,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:17:59,814 INFO L93 Difference]: Finished difference Result 890 states and 1329 transitions. [2025-01-09 03:17:59,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 03:17:59,814 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 91 [2025-01-09 03:17:59,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:17:59,819 INFO L225 Difference]: With dead ends: 890 [2025-01-09 03:17:59,819 INFO L226 Difference]: Without dead ends: 626 [2025-01-09 03:17:59,820 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-01-09 03:17:59,820 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 12 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:17:59,821 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 186 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:17:59,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2025-01-09 03:17:59,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 531. [2025-01-09 03:17:59,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 339 states have (on average 1.2772861356932153) internal successors, (433), 342 states have internal predecessors, (433), 152 states have call successors, (152), 39 states have call predecessors, (152), 39 states have return successors, (150), 149 states have call predecessors, (150), 150 states have call successors, (150) [2025-01-09 03:17:59,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 735 transitions. [2025-01-09 03:17:59,932 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 735 transitions. Word has length 91 [2025-01-09 03:17:59,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:17:59,933 INFO L471 AbstractCegarLoop]: Abstraction has 531 states and 735 transitions. [2025-01-09 03:17:59,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2025-01-09 03:17:59,933 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 735 transitions. [2025-01-09 03:17:59,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2025-01-09 03:17:59,934 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:17:59,934 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:17:59,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-01-09 03:17:59,934 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:17:59,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:17:59,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1675679129, now seen corresponding path program 1 times [2025-01-09 03:17:59,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:17:59,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021477180] [2025-01-09 03:17:59,935 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:17:59,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:17:59,941 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 97 statements into 1 equivalence classes. [2025-01-09 03:17:59,959 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 97 of 97 statements. [2025-01-09 03:17:59,960 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:17:59,960 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:17:59,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [226174280] [2025-01-09 03:17:59,961 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:17:59,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:17:59,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:17:59,964 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:17:59,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-01-09 03:18:00,002 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 97 statements into 1 equivalence classes. [2025-01-09 03:18:00,038 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 97 of 97 statements. [2025-01-09 03:18:00,039 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:18:00,039 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:18:00,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-01-09 03:18:00,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:18:01,233 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2025-01-09 03:18:01,233 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:18:01,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:18:01,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021477180] [2025-01-09 03:18:01,350 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:18:01,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226174280] [2025-01-09 03:18:01,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226174280] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:18:01,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-09 03:18:01,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2025-01-09 03:18:01,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643796666] [2025-01-09 03:18:01,350 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-09 03:18:01,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-01-09 03:18:01,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:18:01,351 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-01-09 03:18:01,351 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2025-01-09 03:18:01,351 INFO L87 Difference]: Start difference. First operand 531 states and 735 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2025-01-09 03:18:02,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:18:02,249 INFO L93 Difference]: Finished difference Result 540 states and 743 transitions. [2025-01-09 03:18:02,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-01-09 03:18:02,249 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 97 [2025-01-09 03:18:02,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:18:02,253 INFO L225 Difference]: With dead ends: 540 [2025-01-09 03:18:02,253 INFO L226 Difference]: Without dead ends: 538 [2025-01-09 03:18:02,253 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2025-01-09 03:18:02,254 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 45 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-01-09 03:18:02,254 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 436 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-01-09 03:18:02,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2025-01-09 03:18:02,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 535. [2025-01-09 03:18:02,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 342 states have (on average 1.2719298245614035) internal successors, (435), 345 states have internal predecessors, (435), 152 states have call successors, (152), 40 states have call predecessors, (152), 40 states have return successors, (150), 149 states have call predecessors, (150), 150 states have call successors, (150) [2025-01-09 03:18:02,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 737 transitions. [2025-01-09 03:18:02,389 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 737 transitions. Word has length 97 [2025-01-09 03:18:02,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:18:02,389 INFO L471 AbstractCegarLoop]: Abstraction has 535 states and 737 transitions. [2025-01-09 03:18:02,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2025-01-09 03:18:02,390 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 737 transitions. [2025-01-09 03:18:02,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2025-01-09 03:18:02,391 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:18:02,391 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:18:02,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-01-09 03:18:02,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-01-09 03:18:02,595 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:18:02,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:18:02,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1301197190, now seen corresponding path program 1 times [2025-01-09 03:18:02,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:18:02,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928438870] [2025-01-09 03:18:02,596 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:18:02,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:18:02,601 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 112 statements into 1 equivalence classes. [2025-01-09 03:18:02,609 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 112 of 112 statements. [2025-01-09 03:18:02,610 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:18:02,610 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:18:02,721 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 46 proven. 11 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2025-01-09 03:18:02,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:18:02,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928438870] [2025-01-09 03:18:02,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928438870] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:18:02,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125389798] [2025-01-09 03:18:02,722 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:18:02,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:18:02,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:18:02,724 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:18:02,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-01-09 03:18:02,761 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 112 statements into 1 equivalence classes. [2025-01-09 03:18:02,790 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 112 of 112 statements. [2025-01-09 03:18:02,791 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:18:02,791 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:18:02,792 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-01-09 03:18:02,794 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:18:02,828 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 92 proven. 11 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2025-01-09 03:18:02,829 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:18:02,926 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 46 proven. 11 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2025-01-09 03:18:02,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125389798] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:18:02,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:18:02,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2025-01-09 03:18:02,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470031354] [2025-01-09 03:18:02,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:18:02,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-01-09 03:18:02,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:18:02,928 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-01-09 03:18:02,928 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-01-09 03:18:02,928 INFO L87 Difference]: Start difference. First operand 535 states and 737 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2025-01-09 03:18:03,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:18:03,279 INFO L93 Difference]: Finished difference Result 731 states and 1053 transitions. [2025-01-09 03:18:03,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-01-09 03:18:03,280 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 112 [2025-01-09 03:18:03,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:18:03,285 INFO L225 Difference]: With dead ends: 731 [2025-01-09 03:18:03,285 INFO L226 Difference]: Without dead ends: 718 [2025-01-09 03:18:03,285 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 223 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2025-01-09 03:18:03,286 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 31 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:18:03,286 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 403 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:18:03,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2025-01-09 03:18:03,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 579. [2025-01-09 03:18:03,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 378 states have (on average 1.2777777777777777) internal successors, (483), 381 states have internal predecessors, (483), 160 states have call successors, (160), 40 states have call predecessors, (160), 40 states have return successors, (158), 157 states have call predecessors, (158), 158 states have call successors, (158) [2025-01-09 03:18:03,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 801 transitions. [2025-01-09 03:18:03,425 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 801 transitions. Word has length 112 [2025-01-09 03:18:03,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:18:03,425 INFO L471 AbstractCegarLoop]: Abstraction has 579 states and 801 transitions. [2025-01-09 03:18:03,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2025-01-09 03:18:03,426 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 801 transitions. [2025-01-09 03:18:03,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2025-01-09 03:18:03,427 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:18:03,427 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:18:03,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-01-09 03:18:03,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-01-09 03:18:03,628 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:18:03,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:18:03,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1536159999, now seen corresponding path program 1 times [2025-01-09 03:18:03,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:18:03,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989834885] [2025-01-09 03:18:03,628 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:18:03,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:18:03,633 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 112 statements into 1 equivalence classes. [2025-01-09 03:18:03,642 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 112 of 112 statements. [2025-01-09 03:18:03,642 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:18:03,642 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:18:03,826 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2025-01-09 03:18:03,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:18:03,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989834885] [2025-01-09 03:18:03,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989834885] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:18:03,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798696265] [2025-01-09 03:18:03,828 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:18:03,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:18:03,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:18:03,830 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:18:03,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-01-09 03:18:03,870 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 112 statements into 1 equivalence classes. [2025-01-09 03:18:03,900 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 112 of 112 statements. [2025-01-09 03:18:03,900 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:18:03,900 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:18:03,904 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-01-09 03:18:03,906 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:18:04,019 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2025-01-09 03:18:04,020 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:18:04,182 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2025-01-09 03:18:04,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798696265] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:18:04,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:18:04,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 14 [2025-01-09 03:18:04,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931043444] [2025-01-09 03:18:04,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:18:04,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-01-09 03:18:04,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:18:04,184 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-01-09 03:18:04,184 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2025-01-09 03:18:04,184 INFO L87 Difference]: Start difference. First operand 579 states and 801 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 8 states have call successors, (45), 6 states have call predecessors, (45), 5 states have return successors, (44), 7 states have call predecessors, (44), 7 states have call successors, (44) [2025-01-09 03:18:04,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:18:04,586 INFO L93 Difference]: Finished difference Result 1354 states and 1894 transitions. [2025-01-09 03:18:04,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-01-09 03:18:04,586 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 8 states have call successors, (45), 6 states have call predecessors, (45), 5 states have return successors, (44), 7 states have call predecessors, (44), 7 states have call successors, (44) Word has length 112 [2025-01-09 03:18:04,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:18:04,596 INFO L225 Difference]: With dead ends: 1354 [2025-01-09 03:18:04,596 INFO L226 Difference]: Without dead ends: 1045 [2025-01-09 03:18:04,599 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 216 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2025-01-09 03:18:04,599 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 115 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 03:18:04,599 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 195 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 03:18:04,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2025-01-09 03:18:04,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 1011. [2025-01-09 03:18:04,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 649 states have (on average 1.2203389830508475) internal successors, (792), 658 states have internal predecessors, (792), 273 states have call successors, (273), 88 states have call predecessors, (273), 88 states have return successors, (265), 264 states have call predecessors, (265), 265 states have call successors, (265) [2025-01-09 03:18:04,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 1330 transitions. [2025-01-09 03:18:04,827 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 1330 transitions. Word has length 112 [2025-01-09 03:18:04,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:18:04,827 INFO L471 AbstractCegarLoop]: Abstraction has 1011 states and 1330 transitions. [2025-01-09 03:18:04,828 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 8 states have call successors, (45), 6 states have call predecessors, (45), 5 states have return successors, (44), 7 states have call predecessors, (44), 7 states have call successors, (44) [2025-01-09 03:18:04,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 1330 transitions. [2025-01-09 03:18:04,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2025-01-09 03:18:04,829 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:18:04,829 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:18:04,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-01-09 03:18:05,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:18:05,031 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:18:05,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:18:05,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1745074663, now seen corresponding path program 2 times [2025-01-09 03:18:05,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:18:05,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173600545] [2025-01-09 03:18:05,032 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:18:05,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:18:05,037 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 114 statements into 2 equivalence classes. [2025-01-09 03:18:05,055 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 114 of 114 statements. [2025-01-09 03:18:05,056 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:18:05,056 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:18:05,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1823379825] [2025-01-09 03:18:05,057 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:18:05,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:18:05,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:18:05,059 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:18:05,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-01-09 03:18:05,097 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 114 statements into 2 equivalence classes. [2025-01-09 03:18:05,136 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 114 of 114 statements. [2025-01-09 03:18:05,136 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:18:05,136 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:18:05,139 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-01-09 03:18:05,143 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:18:05,867 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 58 proven. 56 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2025-01-09 03:18:05,868 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:18:06,004 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 78 proven. 7 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2025-01-09 03:18:06,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:18:06,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173600545] [2025-01-09 03:18:06,004 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:18:06,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823379825] [2025-01-09 03:18:06,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823379825] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:18:06,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 03:18:06,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 23 [2025-01-09 03:18:06,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25316220] [2025-01-09 03:18:06,004 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 03:18:06,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-01-09 03:18:06,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:18:06,005 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-01-09 03:18:06,006 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2025-01-09 03:18:06,006 INFO L87 Difference]: Start difference. First operand 1011 states and 1330 transitions. Second operand has 23 states, 22 states have (on average 2.772727272727273) internal successors, (61), 20 states have internal predecessors, (61), 9 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 10 states have call predecessors, (28), 9 states have call successors, (28) [2025-01-09 03:18:07,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:18:07,138 INFO L93 Difference]: Finished difference Result 1102 states and 1446 transitions. [2025-01-09 03:18:07,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-01-09 03:18:07,138 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.772727272727273) internal successors, (61), 20 states have internal predecessors, (61), 9 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 10 states have call predecessors, (28), 9 states have call successors, (28) Word has length 114 [2025-01-09 03:18:07,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:18:07,145 INFO L225 Difference]: With dead ends: 1102 [2025-01-09 03:18:07,145 INFO L226 Difference]: Without dead ends: 1091 [2025-01-09 03:18:07,146 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2025-01-09 03:18:07,146 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 97 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-01-09 03:18:07,146 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 693 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-01-09 03:18:07,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2025-01-09 03:18:07,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 1057. [2025-01-09 03:18:07,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 687 states have (on average 1.2183406113537119) internal successors, (837), 697 states have internal predecessors, (837), 274 states have call successors, (274), 95 states have call predecessors, (274), 95 states have return successors, (269), 264 states have call predecessors, (269), 269 states have call successors, (269) [2025-01-09 03:18:07,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1380 transitions. [2025-01-09 03:18:07,391 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 1380 transitions. Word has length 114 [2025-01-09 03:18:07,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:18:07,392 INFO L471 AbstractCegarLoop]: Abstraction has 1057 states and 1380 transitions. [2025-01-09 03:18:07,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.772727272727273) internal successors, (61), 20 states have internal predecessors, (61), 9 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 10 states have call predecessors, (28), 9 states have call successors, (28) [2025-01-09 03:18:07,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 1380 transitions. [2025-01-09 03:18:07,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2025-01-09 03:18:07,394 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:18:07,394 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:18:07,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-01-09 03:18:07,594 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:18:07,595 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:18:07,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:18:07,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1186603161, now seen corresponding path program 3 times [2025-01-09 03:18:07,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:18:07,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438610106] [2025-01-09 03:18:07,596 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 03:18:07,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:18:07,602 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 119 statements into 6 equivalence classes. [2025-01-09 03:18:07,639 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 119 of 119 statements. [2025-01-09 03:18:07,639 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-01-09 03:18:07,639 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:18:07,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [307353728] [2025-01-09 03:18:07,643 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 03:18:07,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:18:07,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:18:07,646 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:18:07,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-01-09 03:18:07,686 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 119 statements into 6 equivalence classes. [2025-01-09 03:18:07,716 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 74 of 119 statements. [2025-01-09 03:18:07,716 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-01-09 03:18:07,716 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:18:07,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 59 conjuncts are in the unsatisfiable core [2025-01-09 03:18:07,726 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:18:08,295 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 37 proven. 46 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2025-01-09 03:18:08,295 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:18:08,890 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 38 proven. 36 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2025-01-09 03:18:08,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:18:08,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438610106] [2025-01-09 03:18:08,890 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:18:08,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307353728] [2025-01-09 03:18:08,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307353728] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:18:08,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 03:18:08,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2025-01-09 03:18:08,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545657422] [2025-01-09 03:18:08,890 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 03:18:08,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-01-09 03:18:08,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:18:08,891 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-01-09 03:18:08,891 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2025-01-09 03:18:08,892 INFO L87 Difference]: Start difference. First operand 1057 states and 1380 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 22 states have internal predecessors, (62), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2025-01-09 03:18:11,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:18:11,482 INFO L93 Difference]: Finished difference Result 1483 states and 1991 transitions. [2025-01-09 03:18:11,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-01-09 03:18:11,482 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 22 states have internal predecessors, (62), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) Word has length 119 [2025-01-09 03:18:11,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:18:11,489 INFO L225 Difference]: With dead ends: 1483 [2025-01-09 03:18:11,489 INFO L226 Difference]: Without dead ends: 1481 [2025-01-09 03:18:11,490 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=401, Invalid=1669, Unknown=0, NotChecked=0, Total=2070 [2025-01-09 03:18:11,490 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 134 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2025-01-09 03:18:11,491 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 606 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2025-01-09 03:18:11,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2025-01-09 03:18:11,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1368. [2025-01-09 03:18:11,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 895 states have (on average 1.241340782122905) internal successors, (1111), 904 states have internal predecessors, (1111), 356 states have call successors, (356), 116 states have call predecessors, (356), 116 states have return successors, (351), 347 states have call predecessors, (351), 351 states have call successors, (351) [2025-01-09 03:18:11,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 1818 transitions. [2025-01-09 03:18:11,862 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 1818 transitions. Word has length 119 [2025-01-09 03:18:11,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:18:11,863 INFO L471 AbstractCegarLoop]: Abstraction has 1368 states and 1818 transitions. [2025-01-09 03:18:11,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 22 states have internal predecessors, (62), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2025-01-09 03:18:11,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 1818 transitions. [2025-01-09 03:18:11,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2025-01-09 03:18:11,865 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:18:11,865 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:18:11,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-01-09 03:18:12,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:18:12,069 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:18:12,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:18:12,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1466579619, now seen corresponding path program 4 times [2025-01-09 03:18:12,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:18:12,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552392721] [2025-01-09 03:18:12,070 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 03:18:12,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:18:12,075 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 120 statements into 2 equivalence classes. [2025-01-09 03:18:12,095 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 120 of 120 statements. [2025-01-09 03:18:12,095 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 03:18:12,095 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:18:12,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [202210837] [2025-01-09 03:18:12,096 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 03:18:12,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:18:12,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:18:12,098 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:18:12,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-01-09 03:18:12,138 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 120 statements into 2 equivalence classes. [2025-01-09 03:18:12,167 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 116 of 120 statements. [2025-01-09 03:18:12,167 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-09 03:18:12,167 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:18:12,168 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-01-09 03:18:12,171 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:18:13,364 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 100 proven. 59 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2025-01-09 03:18:13,364 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:18:14,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:18:14,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552392721] [2025-01-09 03:18:14,022 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:18:14,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202210837] [2025-01-09 03:18:14,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202210837] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:18:14,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-09 03:18:14,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2025-01-09 03:18:14,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105981807] [2025-01-09 03:18:14,022 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-09 03:18:14,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-01-09 03:18:14,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:18:14,023 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-01-09 03:18:14,023 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2025-01-09 03:18:14,023 INFO L87 Difference]: Start difference. First operand 1368 states and 1818 transitions. Second operand has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 14 states have internal predecessors, (36), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2025-01-09 03:18:15,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:18:15,190 INFO L93 Difference]: Finished difference Result 1417 states and 1874 transitions. [2025-01-09 03:18:15,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-01-09 03:18:15,191 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 14 states have internal predecessors, (36), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 120 [2025-01-09 03:18:15,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:18:15,198 INFO L225 Difference]: With dead ends: 1417 [2025-01-09 03:18:15,198 INFO L226 Difference]: Without dead ends: 1415 [2025-01-09 03:18:15,199 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2025-01-09 03:18:15,200 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 42 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-01-09 03:18:15,201 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 692 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-01-09 03:18:15,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2025-01-09 03:18:15,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1365. [2025-01-09 03:18:15,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 895 states have (on average 1.2391061452513967) internal successors, (1109), 904 states have internal predecessors, (1109), 352 states have call successors, (352), 117 states have call predecessors, (352), 117 states have return successors, (347), 343 states have call predecessors, (347), 347 states have call successors, (347) [2025-01-09 03:18:15,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 1808 transitions. [2025-01-09 03:18:15,530 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 1808 transitions. Word has length 120 [2025-01-09 03:18:15,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:18:15,530 INFO L471 AbstractCegarLoop]: Abstraction has 1365 states and 1808 transitions. [2025-01-09 03:18:15,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 14 states have internal predecessors, (36), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2025-01-09 03:18:15,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 1808 transitions. [2025-01-09 03:18:15,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2025-01-09 03:18:15,532 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:18:15,532 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:18:15,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-01-09 03:18:15,732 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:18:15,732 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:18:15,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:18:15,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1739915623, now seen corresponding path program 5 times [2025-01-09 03:18:15,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:18:15,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257578877] [2025-01-09 03:18:15,733 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 03:18:15,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:18:15,739 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 124 statements into 6 equivalence classes. [2025-01-09 03:18:15,761 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 124 of 124 statements. [2025-01-09 03:18:15,761 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-01-09 03:18:15,761 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:18:15,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1846498040] [2025-01-09 03:18:15,762 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 03:18:15,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:18:15,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:18:15,766 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:18:15,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-01-09 03:18:15,803 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 124 statements into 6 equivalence classes. [2025-01-09 03:18:15,901 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 124 of 124 statements. [2025-01-09 03:18:15,901 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-01-09 03:18:15,901 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:18:15,903 INFO L256 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 63 conjuncts are in the unsatisfiable core [2025-01-09 03:18:15,905 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:18:17,089 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 74 proven. 56 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2025-01-09 03:18:17,089 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:18:26,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:18:26,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257578877] [2025-01-09 03:18:26,179 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:18:26,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846498040] [2025-01-09 03:18:26,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846498040] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:18:26,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-09 03:18:26,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2025-01-09 03:18:26,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139757694] [2025-01-09 03:18:26,179 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-09 03:18:26,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-01-09 03:18:26,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:18:26,180 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-01-09 03:18:26,180 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=615, Unknown=2, NotChecked=0, Total=756 [2025-01-09 03:18:26,180 INFO L87 Difference]: Start difference. First operand 1365 states and 1808 transitions. Second operand has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 15 states have internal predecessors, (40), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2025-01-09 03:18:27,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:18:27,112 INFO L93 Difference]: Finished difference Result 1403 states and 1849 transitions. [2025-01-09 03:18:27,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-01-09 03:18:27,112 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 15 states have internal predecessors, (40), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) Word has length 124 [2025-01-09 03:18:27,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:18:27,118 INFO L225 Difference]: With dead ends: 1403 [2025-01-09 03:18:27,118 INFO L226 Difference]: Without dead ends: 1401 [2025-01-09 03:18:27,119 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=213, Invalid=907, Unknown=2, NotChecked=0, Total=1122 [2025-01-09 03:18:27,119 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 47 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-01-09 03:18:27,119 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 640 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-01-09 03:18:27,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2025-01-09 03:18:27,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1398. [2025-01-09 03:18:27,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 918 states have (on average 1.2352941176470589) internal successors, (1134), 927 states have internal predecessors, (1134), 356 states have call successors, (356), 123 states have call predecessors, (356), 123 states have return successors, (351), 347 states have call predecessors, (351), 351 states have call successors, (351) [2025-01-09 03:18:27,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 1841 transitions. [2025-01-09 03:18:27,437 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 1841 transitions. Word has length 124 [2025-01-09 03:18:27,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:18:27,438 INFO L471 AbstractCegarLoop]: Abstraction has 1398 states and 1841 transitions. [2025-01-09 03:18:27,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 15 states have internal predecessors, (40), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2025-01-09 03:18:27,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 1841 transitions. [2025-01-09 03:18:27,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2025-01-09 03:18:27,439 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:18:27,439 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:18:27,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-01-09 03:18:27,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:18:27,640 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:18:27,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:18:27,640 INFO L85 PathProgramCache]: Analyzing trace with hash -379532178, now seen corresponding path program 1 times [2025-01-09 03:18:27,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:18:27,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879060130] [2025-01-09 03:18:27,641 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:18:27,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:18:27,646 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 129 statements into 1 equivalence classes. [2025-01-09 03:18:27,654 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 129 of 129 statements. [2025-01-09 03:18:27,654 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:18:27,654 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:18:27,862 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2025-01-09 03:18:27,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:18:27,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879060130] [2025-01-09 03:18:27,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879060130] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:18:27,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992290671] [2025-01-09 03:18:27,863 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:18:27,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:18:27,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:18:27,866 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:18:27,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-01-09 03:18:27,906 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 129 statements into 1 equivalence classes. [2025-01-09 03:18:27,939 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 129 of 129 statements. [2025-01-09 03:18:27,939 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:18:27,939 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:18:27,941 INFO L256 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-01-09 03:18:27,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:18:28,044 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 434 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2025-01-09 03:18:28,044 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:18:28,172 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2025-01-09 03:18:28,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992290671] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:18:28,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:18:28,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 14 [2025-01-09 03:18:28,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354680623] [2025-01-09 03:18:28,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:18:28,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-01-09 03:18:28,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:18:28,174 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-01-09 03:18:28,174 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2025-01-09 03:18:28,174 INFO L87 Difference]: Start difference. First operand 1398 states and 1841 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 10 states have call successors, (57), 7 states have call predecessors, (57), 6 states have return successors, (56), 9 states have call predecessors, (56), 9 states have call successors, (56) [2025-01-09 03:18:28,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:18:28,586 INFO L93 Difference]: Finished difference Result 1438 states and 1881 transitions. [2025-01-09 03:18:28,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-01-09 03:18:28,586 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 10 states have call successors, (57), 7 states have call predecessors, (57), 6 states have return successors, (56), 9 states have call predecessors, (56), 9 states have call successors, (56) Word has length 129 [2025-01-09 03:18:28,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:18:28,592 INFO L225 Difference]: With dead ends: 1438 [2025-01-09 03:18:28,592 INFO L226 Difference]: Without dead ends: 1416 [2025-01-09 03:18:28,593 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 250 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=296, Unknown=0, NotChecked=0, Total=462 [2025-01-09 03:18:28,593 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 67 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:18:28,594 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 182 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:18:28,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2025-01-09 03:18:28,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 1410. [2025-01-09 03:18:28,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 930 states have (on average 1.2204301075268817) internal successors, (1135), 939 states have internal predecessors, (1135), 356 states have call successors, (356), 123 states have call predecessors, (356), 123 states have return successors, (351), 347 states have call predecessors, (351), 351 states have call successors, (351) [2025-01-09 03:18:28,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 1842 transitions. [2025-01-09 03:18:28,990 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 1842 transitions. Word has length 129 [2025-01-09 03:18:28,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:18:28,990 INFO L471 AbstractCegarLoop]: Abstraction has 1410 states and 1842 transitions. [2025-01-09 03:18:28,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 10 states have call successors, (57), 7 states have call predecessors, (57), 6 states have return successors, (56), 9 states have call predecessors, (56), 9 states have call successors, (56) [2025-01-09 03:18:28,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 1842 transitions. [2025-01-09 03:18:28,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2025-01-09 03:18:28,991 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:18:28,991 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:18:28,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-01-09 03:18:29,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2025-01-09 03:18:29,192 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:18:29,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:18:29,192 INFO L85 PathProgramCache]: Analyzing trace with hash 998301078, now seen corresponding path program 2 times [2025-01-09 03:18:29,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:18:29,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422346040] [2025-01-09 03:18:29,192 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:18:29,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:18:29,198 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 130 statements into 2 equivalence classes. [2025-01-09 03:18:29,215 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 130 of 130 statements. [2025-01-09 03:18:29,215 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:18:29,215 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:18:29,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [494942209] [2025-01-09 03:18:29,216 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:18:29,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:18:29,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:18:29,219 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:18:29,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-01-09 03:18:29,257 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 130 statements into 2 equivalence classes. [2025-01-09 03:18:29,306 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 130 of 130 statements. [2025-01-09 03:18:29,306 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:18:29,306 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:18:29,309 INFO L256 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 66 conjuncts are in the unsatisfiable core [2025-01-09 03:18:29,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:18:30,038 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 73 proven. 65 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2025-01-09 03:18:30,038 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:18:30,958 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 73 proven. 56 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2025-01-09 03:18:30,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:18:30,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422346040] [2025-01-09 03:18:30,958 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:18:30,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494942209] [2025-01-09 03:18:30,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494942209] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:18:30,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 03:18:30,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 30 [2025-01-09 03:18:30,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456109124] [2025-01-09 03:18:30,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 03:18:30,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-01-09 03:18:30,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:18:30,959 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-01-09 03:18:30,959 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2025-01-09 03:18:30,960 INFO L87 Difference]: Start difference. First operand 1410 states and 1842 transitions. Second operand has 30 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 15 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (40), 13 states have call predecessors, (40), 13 states have call successors, (40) [2025-01-09 03:18:37,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:18:37,227 INFO L93 Difference]: Finished difference Result 1610 states and 2145 transitions. [2025-01-09 03:18:37,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2025-01-09 03:18:37,227 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 15 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (40), 13 states have call predecessors, (40), 13 states have call successors, (40) Word has length 130 [2025-01-09 03:18:37,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:18:37,233 INFO L225 Difference]: With dead ends: 1610 [2025-01-09 03:18:37,233 INFO L226 Difference]: Without dead ends: 1587 [2025-01-09 03:18:37,235 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=810, Invalid=3222, Unknown=0, NotChecked=0, Total=4032 [2025-01-09 03:18:37,235 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 217 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2025-01-09 03:18:37,235 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 960 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 974 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2025-01-09 03:18:37,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2025-01-09 03:18:37,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 1547. [2025-01-09 03:18:37,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1547 states, 1008 states have (on average 1.2281746031746033) internal successors, (1238), 1016 states have internal predecessors, (1238), 412 states have call successors, (412), 126 states have call predecessors, (412), 126 states have return successors, (409), 404 states have call predecessors, (409), 409 states have call successors, (409) [2025-01-09 03:18:37,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1547 states to 1547 states and 2059 transitions. [2025-01-09 03:18:37,911 INFO L78 Accepts]: Start accepts. Automaton has 1547 states and 2059 transitions. Word has length 130 [2025-01-09 03:18:37,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:18:37,911 INFO L471 AbstractCegarLoop]: Abstraction has 1547 states and 2059 transitions. [2025-01-09 03:18:37,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 15 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (40), 13 states have call predecessors, (40), 13 states have call successors, (40) [2025-01-09 03:18:37,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1547 states and 2059 transitions. [2025-01-09 03:18:37,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2025-01-09 03:18:37,913 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:18:37,914 INFO L218 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:18:37,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-01-09 03:18:38,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-01-09 03:18:38,118 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:18:38,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:18:38,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1091217127, now seen corresponding path program 6 times [2025-01-09 03:18:38,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:18:38,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401332570] [2025-01-09 03:18:38,119 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 03:18:38,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:18:38,124 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 143 statements into 8 equivalence classes. [2025-01-09 03:18:38,152 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) and asserted 143 of 143 statements. [2025-01-09 03:18:38,153 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2025-01-09 03:18:38,153 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:18:38,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [25611755] [2025-01-09 03:18:38,154 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 03:18:38,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:18:38,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:18:38,158 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:18:38,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-01-09 03:18:38,199 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 143 statements into 8 equivalence classes. [2025-01-09 03:18:38,251 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 77 of 143 statements. [2025-01-09 03:18:38,251 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-01-09 03:18:38,251 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:18:38,253 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-01-09 03:18:38,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:18:39,862 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 118 proven. 34 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2025-01-09 03:18:39,863 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:18:46,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:18:46,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401332570] [2025-01-09 03:18:46,966 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:18:46,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25611755] [2025-01-09 03:18:46,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25611755] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:18:46,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-09 03:18:46,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2025-01-09 03:18:46,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255371560] [2025-01-09 03:18:46,967 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-09 03:18:46,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-09 03:18:46,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:18:46,967 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-09 03:18:46,968 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=483, Unknown=1, NotChecked=0, Total=600 [2025-01-09 03:18:46,968 INFO L87 Difference]: Start difference. First operand 1547 states and 2059 transitions. Second operand has 17 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2025-01-09 03:18:47,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:18:47,870 INFO L93 Difference]: Finished difference Result 1590 states and 2112 transitions. [2025-01-09 03:18:47,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-01-09 03:18:47,871 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 143 [2025-01-09 03:18:47,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:18:47,876 INFO L225 Difference]: With dead ends: 1590 [2025-01-09 03:18:47,876 INFO L226 Difference]: Without dead ends: 1588 [2025-01-09 03:18:47,876 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=138, Invalid=563, Unknown=1, NotChecked=0, Total=702 [2025-01-09 03:18:47,877 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 39 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-01-09 03:18:47,877 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 418 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-01-09 03:18:47,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2025-01-09 03:18:48,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1577. [2025-01-09 03:18:48,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1577 states, 1026 states have (on average 1.2270955165692008) internal successors, (1259), 1034 states have internal predecessors, (1259), 420 states have call successors, (420), 130 states have call predecessors, (420), 130 states have return successors, (417), 412 states have call predecessors, (417), 417 states have call successors, (417) [2025-01-09 03:18:48,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 2096 transitions. [2025-01-09 03:18:48,376 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 2096 transitions. Word has length 143 [2025-01-09 03:18:48,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:18:48,376 INFO L471 AbstractCegarLoop]: Abstraction has 1577 states and 2096 transitions. [2025-01-09 03:18:48,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2025-01-09 03:18:48,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 2096 transitions. [2025-01-09 03:18:48,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2025-01-09 03:18:48,378 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:18:48,378 INFO L218 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:18:48,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-01-09 03:18:48,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-01-09 03:18:48,579 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:18:48,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:18:48,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1556970589, now seen corresponding path program 7 times [2025-01-09 03:18:48,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:18:48,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556080403] [2025-01-09 03:18:48,580 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 03:18:48,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:18:48,586 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 147 statements into 1 equivalence classes. [2025-01-09 03:18:48,611 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 147 of 147 statements. [2025-01-09 03:18:48,611 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:18:48,611 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:18:48,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1922000267] [2025-01-09 03:18:48,612 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 03:18:48,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:18:48,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:18:48,615 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:18:48,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-01-09 03:18:48,660 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 147 statements into 1 equivalence classes. [2025-01-09 03:18:48,711 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 147 of 147 statements. [2025-01-09 03:18:48,711 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:18:48,711 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:18:48,718 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-01-09 03:18:48,722 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:18:50,620 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 91 proven. 86 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2025-01-09 03:18:50,620 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:18:50,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:18:50,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556080403] [2025-01-09 03:18:50,753 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:18:50,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922000267] [2025-01-09 03:18:50,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922000267] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:18:50,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-09 03:18:50,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2025-01-09 03:18:50,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415317426] [2025-01-09 03:18:50,753 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-09 03:18:50,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-01-09 03:18:50,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:18:50,754 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-01-09 03:18:50,754 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2025-01-09 03:18:50,754 INFO L87 Difference]: Start difference. First operand 1577 states and 2096 transitions. Second operand has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 17 states have internal predecessors, (43), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2025-01-09 03:18:52,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:18:52,123 INFO L93 Difference]: Finished difference Result 1596 states and 2114 transitions. [2025-01-09 03:18:52,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-01-09 03:18:52,124 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 17 states have internal predecessors, (43), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) Word has length 147 [2025-01-09 03:18:52,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:18:52,130 INFO L225 Difference]: With dead ends: 1596 [2025-01-09 03:18:52,130 INFO L226 Difference]: Without dead ends: 1594 [2025-01-09 03:18:52,131 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2025-01-09 03:18:52,131 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 53 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-01-09 03:18:52,131 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 838 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-01-09 03:18:52,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2025-01-09 03:18:52,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1589. [2025-01-09 03:18:52,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1589 states, 1035 states have (on average 1.2251207729468598) internal successors, (1268), 1043 states have internal predecessors, (1268), 420 states have call successors, (420), 133 states have call predecessors, (420), 133 states have return successors, (417), 412 states have call predecessors, (417), 417 states have call successors, (417) [2025-01-09 03:18:52,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1589 states to 1589 states and 2105 transitions. [2025-01-09 03:18:52,751 INFO L78 Accepts]: Start accepts. Automaton has 1589 states and 2105 transitions. Word has length 147 [2025-01-09 03:18:52,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:18:52,751 INFO L471 AbstractCegarLoop]: Abstraction has 1589 states and 2105 transitions. [2025-01-09 03:18:52,751 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 17 states have internal predecessors, (43), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2025-01-09 03:18:52,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1589 states and 2105 transitions. [2025-01-09 03:18:52,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2025-01-09 03:18:52,752 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:18:52,752 INFO L218 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:18:52,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2025-01-09 03:18:52,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-01-09 03:18:52,953 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:18:52,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:18:52,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1996336043, now seen corresponding path program 8 times [2025-01-09 03:18:52,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:18:52,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470478172] [2025-01-09 03:18:52,954 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:18:52,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:18:52,959 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 147 statements into 2 equivalence classes. [2025-01-09 03:18:52,978 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 147 of 147 statements. [2025-01-09 03:18:52,978 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:18:52,978 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:18:52,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1117103020] [2025-01-09 03:18:52,981 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:18:52,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:18:52,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:18:52,983 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:18:52,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-01-09 03:18:53,027 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 147 statements into 2 equivalence classes. [2025-01-09 03:18:53,068 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 147 of 147 statements. [2025-01-09 03:18:53,068 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:18:53,068 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:18:53,070 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 54 conjuncts are in the unsatisfiable core [2025-01-09 03:18:53,072 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:18:54,172 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 94 proven. 83 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2025-01-09 03:18:54,173 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:18:54,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:18:54,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470478172] [2025-01-09 03:18:54,298 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:18:54,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117103020] [2025-01-09 03:18:54,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117103020] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:18:54,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-09 03:18:54,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2025-01-09 03:18:54,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129105333] [2025-01-09 03:18:54,299 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-09 03:18:54,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-01-09 03:18:54,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:18:54,299 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-01-09 03:18:54,299 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2025-01-09 03:18:54,300 INFO L87 Difference]: Start difference. First operand 1589 states and 2105 transitions. Second operand has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 16 states have internal predecessors, (43), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 9 states have call predecessors, (23), 7 states have call successors, (23) [2025-01-09 03:18:55,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:18:55,550 INFO L93 Difference]: Finished difference Result 1642 states and 2177 transitions. [2025-01-09 03:18:55,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-01-09 03:18:55,551 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 16 states have internal predecessors, (43), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 9 states have call predecessors, (23), 7 states have call successors, (23) Word has length 147 [2025-01-09 03:18:55,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:18:55,558 INFO L225 Difference]: With dead ends: 1642 [2025-01-09 03:18:55,558 INFO L226 Difference]: Without dead ends: 1640 [2025-01-09 03:18:55,559 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2025-01-09 03:18:55,559 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 56 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-01-09 03:18:55,559 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 557 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-01-09 03:18:55,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2025-01-09 03:18:56,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1617. [2025-01-09 03:18:56,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1051 states have (on average 1.2235965746907707) internal successors, (1286), 1059 states have internal predecessors, (1286), 428 states have call successors, (428), 137 states have call predecessors, (428), 137 states have return successors, (425), 420 states have call predecessors, (425), 425 states have call successors, (425) [2025-01-09 03:18:56,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 2139 transitions. [2025-01-09 03:18:56,151 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 2139 transitions. Word has length 147 [2025-01-09 03:18:56,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:18:56,151 INFO L471 AbstractCegarLoop]: Abstraction has 1617 states and 2139 transitions. [2025-01-09 03:18:56,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 16 states have internal predecessors, (43), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 9 states have call predecessors, (23), 7 states have call successors, (23) [2025-01-09 03:18:56,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 2139 transitions. [2025-01-09 03:18:56,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2025-01-09 03:18:56,153 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:18:56,153 INFO L218 NwaCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:18:56,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-01-09 03:18:56,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-01-09 03:18:56,353 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:18:56,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:18:56,354 INFO L85 PathProgramCache]: Analyzing trace with hash 937473503, now seen corresponding path program 9 times [2025-01-09 03:18:56,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:18:56,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370545951] [2025-01-09 03:18:56,354 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 03:18:56,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:18:56,361 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 165 statements into 7 equivalence classes. [2025-01-09 03:18:56,384 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 165 of 165 statements. [2025-01-09 03:18:56,384 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-01-09 03:18:56,384 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:18:56,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1649150866] [2025-01-09 03:18:56,385 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 03:18:56,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:18:56,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:18:56,387 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:18:56,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-01-09 03:18:56,432 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 165 statements into 7 equivalence classes. [2025-01-09 03:18:56,517 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 110 of 165 statements. [2025-01-09 03:18:56,517 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-01-09 03:18:56,517 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:18:56,518 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 63 conjuncts are in the unsatisfiable core [2025-01-09 03:18:56,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:18:59,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1097 backedges. 153 proven. 116 refuted. 0 times theorem prover too weak. 828 trivial. 0 not checked. [2025-01-09 03:18:59,086 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:19:00,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:19:00,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370545951] [2025-01-09 03:19:00,330 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:19:00,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649150866] [2025-01-09 03:19:00,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649150866] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:19:00,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-09 03:19:00,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2025-01-09 03:19:00,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810158023] [2025-01-09 03:19:00,331 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-09 03:19:00,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-01-09 03:19:00,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:19:00,331 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-01-09 03:19:00,332 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2025-01-09 03:19:00,332 INFO L87 Difference]: Start difference. First operand 1617 states and 2139 transitions. Second operand has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 9 states have call predecessors, (26), 10 states have call successors, (26) [2025-01-09 03:19:02,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:19:02,401 INFO L93 Difference]: Finished difference Result 1697 states and 2238 transitions. [2025-01-09 03:19:02,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-01-09 03:19:02,402 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 9 states have call predecessors, (26), 10 states have call successors, (26) Word has length 165 [2025-01-09 03:19:02,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:19:02,407 INFO L225 Difference]: With dead ends: 1697 [2025-01-09 03:19:02,407 INFO L226 Difference]: Without dead ends: 1695 [2025-01-09 03:19:02,408 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=157, Invalid=965, Unknown=0, NotChecked=0, Total=1122 [2025-01-09 03:19:02,408 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 44 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-01-09 03:19:02,409 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 883 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-01-09 03:19:02,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1695 states. [2025-01-09 03:19:02,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1695 to 1688. [2025-01-09 03:19:02,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1688 states, 1093 states have (on average 1.222323879231473) internal successors, (1336), 1101 states have internal predecessors, (1336), 448 states have call successors, (448), 146 states have call predecessors, (448), 146 states have return successors, (445), 440 states have call predecessors, (445), 445 states have call successors, (445) [2025-01-09 03:19:02,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 2229 transitions. [2025-01-09 03:19:02,963 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 2229 transitions. Word has length 165 [2025-01-09 03:19:02,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:19:02,963 INFO L471 AbstractCegarLoop]: Abstraction has 1688 states and 2229 transitions. [2025-01-09 03:19:02,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 9 states have call predecessors, (26), 10 states have call successors, (26) [2025-01-09 03:19:02,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 2229 transitions. [2025-01-09 03:19:02,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2025-01-09 03:19:02,965 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:19:02,965 INFO L218 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:19:02,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-01-09 03:19:03,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-01-09 03:19:03,166 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:19:03,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:19:03,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1509933593, now seen corresponding path program 10 times [2025-01-09 03:19:03,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:19:03,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077505612] [2025-01-09 03:19:03,166 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 03:19:03,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:19:03,172 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 170 statements into 2 equivalence classes. [2025-01-09 03:19:03,188 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 170 of 170 statements. [2025-01-09 03:19:03,189 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 03:19:03,189 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:19:03,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [443192751] [2025-01-09 03:19:03,192 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 03:19:03,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:19:03,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:19:03,194 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:19:03,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-01-09 03:19:03,238 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 170 statements into 2 equivalence classes. [2025-01-09 03:19:03,281 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 166 of 170 statements. [2025-01-09 03:19:03,281 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-09 03:19:03,281 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:19:03,282 INFO L256 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 67 conjuncts are in the unsatisfiable core [2025-01-09 03:19:03,284 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:19:05,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1192 backedges. 116 proven. 175 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2025-01-09 03:19:05,137 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:19:05,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:19:05,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077505612] [2025-01-09 03:19:05,618 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:19:05,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443192751] [2025-01-09 03:19:05,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443192751] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:19:05,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-09 03:19:05,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2025-01-09 03:19:05,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782756696] [2025-01-09 03:19:05,619 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-09 03:19:05,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-01-09 03:19:05,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:19:05,619 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-01-09 03:19:05,620 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2025-01-09 03:19:05,620 INFO L87 Difference]: Start difference. First operand 1688 states and 2229 transitions. Second operand has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 17 states have internal predecessors, (46), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2025-01-09 03:19:06,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:19:06,992 INFO L93 Difference]: Finished difference Result 1739 states and 2299 transitions. [2025-01-09 03:19:06,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-01-09 03:19:06,993 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 17 states have internal predecessors, (46), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) Word has length 170 [2025-01-09 03:19:06,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:19:06,999 INFO L225 Difference]: With dead ends: 1739 [2025-01-09 03:19:06,999 INFO L226 Difference]: Without dead ends: 1737 [2025-01-09 03:19:07,000 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2025-01-09 03:19:07,001 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 65 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-01-09 03:19:07,001 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 770 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-01-09 03:19:07,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2025-01-09 03:19:07,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 1732. [2025-01-09 03:19:07,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1732 states, 1118 states have (on average 1.221824686940966) internal successors, (1366), 1126 states have internal predecessors, (1366), 464 states have call successors, (464), 149 states have call predecessors, (464), 149 states have return successors, (461), 456 states have call predecessors, (461), 461 states have call successors, (461) [2025-01-09 03:19:07,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 2291 transitions. [2025-01-09 03:19:07,651 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 2291 transitions. Word has length 170 [2025-01-09 03:19:07,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:19:07,651 INFO L471 AbstractCegarLoop]: Abstraction has 1732 states and 2291 transitions. [2025-01-09 03:19:07,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 17 states have internal predecessors, (46), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2025-01-09 03:19:07,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 2291 transitions. [2025-01-09 03:19:07,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2025-01-09 03:19:07,653 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:19:07,653 INFO L218 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:19:07,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-01-09 03:19:07,858 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:19:07,858 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:19:07,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:19:07,858 INFO L85 PathProgramCache]: Analyzing trace with hash 600535841, now seen corresponding path program 11 times [2025-01-09 03:19:07,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:19:07,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038349635] [2025-01-09 03:19:07,858 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 03:19:07,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:19:07,864 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 170 statements into 7 equivalence classes. [2025-01-09 03:19:07,881 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 170 of 170 statements. [2025-01-09 03:19:07,882 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-01-09 03:19:07,882 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:19:07,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [863242986] [2025-01-09 03:19:07,883 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 03:19:07,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:19:07,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:19:07,885 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:19:07,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-01-09 03:19:07,927 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 170 statements into 7 equivalence classes. [2025-01-09 03:19:08,002 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 170 of 170 statements. [2025-01-09 03:19:08,002 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-01-09 03:19:08,002 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:19:08,006 INFO L256 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 83 conjuncts are in the unsatisfiable core [2025-01-09 03:19:08,009 INFO L279 TraceCheckSpWp]: Computing forward predicates...