./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/rewnifrev2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/rewnifrev2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --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 a70897b8f9d01ade64d517ee2bf20dd64d1adb0a94ea95e1a8b2431f33b62533 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 22:26:45,711 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 22:26:45,712 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 22:26:45,724 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 22:26:45,724 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 22:26:45,725 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 22:26:45,726 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 22:26:45,727 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 22:26:45,727 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 22:26:45,728 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 22:26:45,729 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 22:26:45,729 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 22:26:45,729 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 22:26:45,730 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 22:26:45,731 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 22:26:45,731 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 22:26:45,732 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 22:26:45,732 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 22:26:45,733 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 22:26:45,734 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 22:26:45,735 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 22:26:45,736 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 22:26:45,737 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 22:26:45,737 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 22:26:45,739 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 22:26:45,740 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 22:26:45,740 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 22:26:45,740 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 22:26:45,741 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 22:26:45,741 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 22:26:45,741 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 22:26:45,742 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 22:26:45,742 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 22:26:45,743 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 22:26:45,743 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 22:26:45,744 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 22:26:45,744 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 22:26:45,744 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 22:26:45,744 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 22:26:45,745 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 22:26:45,745 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 22:26:45,746 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 22:26:45,760 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 22:26:45,760 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 22:26:45,760 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 22:26:45,760 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 22:26:45,761 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 22:26:45,761 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 22:26:45,761 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 22:26:45,761 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 22:26:45,761 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 22:26:45,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 22:26:45,762 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 22:26:45,767 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 22:26:45,767 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 22:26:45,767 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 22:26:45,768 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 22:26:45,768 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 22:26:45,768 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 22:26:45,768 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 22:26:45,768 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 22:26:45,768 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 22:26:45,769 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 22:26:45,769 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 22:26:45,769 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 22:26:45,769 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 22:26:45,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 22:26:45,770 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 22:26:45,770 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 22:26:45,770 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 22:26:45,770 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 22:26:45,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 22:26:45,770 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 22:26:45,771 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 22:26:45,771 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 22:26:45,771 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 22:26:45,771 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 22:26:45,771 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a70897b8f9d01ade64d517ee2bf20dd64d1adb0a94ea95e1a8b2431f33b62533 [2022-12-13 22:26:45,947 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 22:26:45,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 22:26:45,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 22:26:45,966 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 22:26:45,966 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 22:26:45,967 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/array-tiling/rewnifrev2.c [2022-12-13 22:26:48,575 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 22:26:48,591 ERROR L? ?]: Error during toolchain job processing: java.lang.NullPointerException 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) [2022-12-13 22:26:48,725 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 22:26:48,725 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/sv-benchmarks/c/array-tiling/rewnifrev2.c [2022-12-13 22:26:48,729 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/data/08f534ff3/bc494d1589564acfaf913a305eea69c3/FLAG21c51d582 [2022-12-13 22:26:48,740 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/data/08f534ff3/bc494d1589564acfaf913a305eea69c3 [2022-12-13 22:26:48,742 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 22:26:48,744 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 22:26:48,745 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 22:26:48,745 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 22:26:48,748 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 22:26:48,749 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:26:48" (1/1) ... [2022-12-13 22:26:48,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1426dc16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:26:48, skipping insertion in model container [2022-12-13 22:26:48,750 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:26:48" (1/1) ... [2022-12-13 22:26:48,756 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 22:26:48,770 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 22:26:48,898 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/sv-benchmarks/c/array-tiling/rewnifrev2.c[401,414] [2022-12-13 22:26:48,912 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 22:26:48,921 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 22:26:48,931 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/sv-benchmarks/c/array-tiling/rewnifrev2.c[401,414] [2022-12-13 22:26:48,936 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 22:26:48,948 INFO L208 MainTranslator]: Completed translation [2022-12-13 22:26:48,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:26:48 WrapperNode [2022-12-13 22:26:48,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 22:26:48,950 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 22:26:48,950 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 22:26:48,950 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 22:26:48,955 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:26:48" (1/1) ... [2022-12-13 22:26:48,961 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:26:48" (1/1) ... [2022-12-13 22:26:48,977 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2022-12-13 22:26:48,978 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 22:26:48,978 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 22:26:48,978 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 22:26:48,979 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 22:26:48,987 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:26:48" (1/1) ... [2022-12-13 22:26:48,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:26:48" (1/1) ... [2022-12-13 22:26:48,989 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:26:48" (1/1) ... [2022-12-13 22:26:48,989 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:26:48" (1/1) ... [2022-12-13 22:26:48,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:26:48" (1/1) ... [2022-12-13 22:26:48,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:26:48" (1/1) ... [2022-12-13 22:26:48,998 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:26:48" (1/1) ... [2022-12-13 22:26:48,998 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:26:48" (1/1) ... [2022-12-13 22:26:48,999 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 22:26:49,000 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 22:26:49,000 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 22:26:49,000 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 22:26:49,001 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:26:48" (1/1) ... [2022-12-13 22:26:49,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 22:26:49,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:26:49,025 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 22:26:49,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 22:26:49,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 22:26:49,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 22:26:49,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 22:26:49,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 22:26:49,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 22:26:49,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 22:26:49,061 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 22:26:49,122 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 22:26:49,124 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 22:26:49,238 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 22:26:49,244 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 22:26:49,245 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 22:26:49,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:26:49 BoogieIcfgContainer [2022-12-13 22:26:49,247 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 22:26:49,249 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 22:26:49,249 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 22:26:49,253 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 22:26:49,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 10:26:48" (1/3) ... [2022-12-13 22:26:49,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dfa5b24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:26:49, skipping insertion in model container [2022-12-13 22:26:49,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:26:48" (2/3) ... [2022-12-13 22:26:49,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dfa5b24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:26:49, skipping insertion in model container [2022-12-13 22:26:49,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:26:49" (3/3) ... [2022-12-13 22:26:49,256 INFO L112 eAbstractionObserver]: Analyzing ICFG rewnifrev2.c [2022-12-13 22:26:49,277 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 22:26:49,277 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 22:26:49,331 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 22:26:49,339 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@710fa283, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 22:26:49,339 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 22:26:49,344 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:49,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 22:26:49,351 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:26:49,352 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:26:49,352 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:26:49,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:26:49,358 INFO L85 PathProgramCache]: Analyzing trace with hash 126991449, now seen corresponding path program 1 times [2022-12-13 22:26:49,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:26:49,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879483162] [2022-12-13 22:26:49,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:26:49,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:26:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:26:49,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:49,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:26:49,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879483162] [2022-12-13 22:26:49,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879483162] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:26:49,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:26:49,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 22:26:49,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226270590] [2022-12-13 22:26:49,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:26:49,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 22:26:49,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:26:49,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 22:26:49,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 22:26:49,540 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:49,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:26:49,551 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2022-12-13 22:26:49,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 22:26:49,553 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-13 22:26:49,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:26:49,567 INFO L225 Difference]: With dead ends: 27 [2022-12-13 22:26:49,567 INFO L226 Difference]: Without dead ends: 12 [2022-12-13 22:26:49,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 22:26:49,572 INFO L413 NwaCegarLoop]: 18 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, 18 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 [2022-12-13 22:26:49,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 22:26:49,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-12-13 22:26:49,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-12-13 22:26:49,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:49,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2022-12-13 22:26:49,602 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2022-12-13 22:26:49,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:26:49,602 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2022-12-13 22:26:49,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:49,603 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2022-12-13 22:26:49,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 22:26:49,603 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:26:49,603 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:26:49,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 22:26:49,604 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:26:49,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:26:49,605 INFO L85 PathProgramCache]: Analyzing trace with hash 121450323, now seen corresponding path program 1 times [2022-12-13 22:26:49,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:26:49,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098196388] [2022-12-13 22:26:49,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:26:49,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:26:49,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:26:49,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:49,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:26:49,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098196388] [2022-12-13 22:26:49,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098196388] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:26:49,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:26:49,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 22:26:49,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892626602] [2022-12-13 22:26:49,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:26:49,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:26:49,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:26:49,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:26:49,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:26:49,669 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:49,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:26:49,686 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2022-12-13 22:26:49,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:26:49,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-13 22:26:49,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:26:49,687 INFO L225 Difference]: With dead ends: 20 [2022-12-13 22:26:49,687 INFO L226 Difference]: Without dead ends: 13 [2022-12-13 22:26:49,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:26:49,688 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 6 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 22:26:49,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 10 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 22:26:49,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-12-13 22:26:49,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-12-13 22:26:49,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:49,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-12-13 22:26:49,691 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2022-12-13 22:26:49,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:26:49,691 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-12-13 22:26:49,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:49,692 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-12-13 22:26:49,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 22:26:49,692 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:26:49,692 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:26:49,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 22:26:49,692 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:26:49,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:26:49,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1899941007, now seen corresponding path program 1 times [2022-12-13 22:26:49,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:26:49,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708653875] [2022-12-13 22:26:49,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:26:49,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:26:49,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:26:50,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:50,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:26:50,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708653875] [2022-12-13 22:26:50,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708653875] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:26:50,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:26:50,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 22:26:50,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526516389] [2022-12-13 22:26:50,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:26:50,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 22:26:50,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:26:50,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 22:26:50,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 22:26:50,105 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:50,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:26:50,188 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2022-12-13 22:26:50,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 22:26:50,189 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-13 22:26:50,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:26:50,190 INFO L225 Difference]: With dead ends: 19 [2022-12-13 22:26:50,190 INFO L226 Difference]: Without dead ends: 17 [2022-12-13 22:26:50,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-12-13 22:26:50,192 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 22:26:50,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 17 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 22:26:50,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-13 22:26:50,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2022-12-13 22:26:50,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:50,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-12-13 22:26:50,198 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2022-12-13 22:26:50,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:26:50,198 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-12-13 22:26:50,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:50,198 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-12-13 22:26:50,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-13 22:26:50,199 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:26:50,199 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:26:50,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 22:26:50,199 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:26:50,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:26:50,200 INFO L85 PathProgramCache]: Analyzing trace with hash 604563239, now seen corresponding path program 1 times [2022-12-13 22:26:50,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:26:50,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122421974] [2022-12-13 22:26:50,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:26:50,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:26:50,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:26:50,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:50,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:26:50,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122421974] [2022-12-13 22:26:50,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122421974] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:26:50,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706306063] [2022-12-13 22:26:50,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:26:50,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:26:50,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:26:50,442 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:26:50,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 22:26:50,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:26:50,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 22:26:50,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:26:50,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 24 [2022-12-13 22:26:50,835 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-12-13 22:26:50,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2022-12-13 22:26:50,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:50,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:26:51,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:51,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706306063] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:26:51,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:26:51,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2022-12-13 22:26:51,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783069102] [2022-12-13 22:26:51,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:26:51,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 22:26:51,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:26:51,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 22:26:51,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-12-13 22:26:51,011 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:52,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:26:52,226 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2022-12-13 22:26:52,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 22:26:52,227 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-13 22:26:52,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:26:52,227 INFO L225 Difference]: With dead ends: 24 [2022-12-13 22:26:52,227 INFO L226 Difference]: Without dead ends: 22 [2022-12-13 22:26:52,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=677, Unknown=0, NotChecked=0, Total=930 [2022-12-13 22:26:52,229 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 64 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 22:26:52,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 23 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 68 Invalid, 1 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 22:26:52,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-13 22:26:52,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2022-12-13 22:26:52,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:52,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-12-13 22:26:52,232 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2022-12-13 22:26:52,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:26:52,233 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-12-13 22:26:52,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:52,233 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-12-13 22:26:52,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-13 22:26:52,233 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:26:52,233 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:26:52,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 22:26:52,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:26:52,434 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:26:52,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:26:52,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1572614179, now seen corresponding path program 2 times [2022-12-13 22:26:52,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:26:52,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278197921] [2022-12-13 22:26:52,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:26:52,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:26:52,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:26:52,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:52,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:26:52,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278197921] [2022-12-13 22:26:52,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278197921] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:26:52,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122772322] [2022-12-13 22:26:52,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:26:52,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:26:52,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:26:52,499 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:26:52,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 22:26:52,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 22:26:52,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:26:52,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 22:26:52,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:26:52,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:52,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:26:52,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:52,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122772322] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:26:52,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:26:52,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-12-13 22:26:52,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120150475] [2022-12-13 22:26:52,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:26:52,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 22:26:52,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:26:52,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 22:26:52,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2022-12-13 22:26:52,656 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:52,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:26:52,714 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2022-12-13 22:26:52,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 22:26:52,714 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-13 22:26:52,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:26:52,715 INFO L225 Difference]: With dead ends: 38 [2022-12-13 22:26:52,715 INFO L226 Difference]: Without dead ends: 22 [2022-12-13 22:26:52,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2022-12-13 22:26:52,716 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 13 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 22:26:52,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 46 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 22:26:52,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-13 22:26:52,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-12-13 22:26:52,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:52,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-12-13 22:26:52,722 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2022-12-13 22:26:52,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:26:52,723 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-12-13 22:26:52,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:52,723 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-12-13 22:26:52,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-13 22:26:52,724 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:26:52,724 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:26:52,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 22:26:52,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:26:52,924 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:26:52,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:26:52,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1704999301, now seen corresponding path program 3 times [2022-12-13 22:26:52,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:26:52,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67937048] [2022-12-13 22:26:52,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:26:52,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:26:52,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:26:53,167 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:53,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:26:53,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67937048] [2022-12-13 22:26:53,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67937048] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:26:53,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515324505] [2022-12-13 22:26:53,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 22:26:53,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:26:53,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:26:53,169 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:26:53,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 22:26:53,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 22:26:53,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:26:53,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 22:26:53,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:26:53,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 24 [2022-12-13 22:26:53,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 41 [2022-12-13 22:26:53,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:26:53,605 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:26:53,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 12 [2022-12-13 22:26:53,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:53,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:26:53,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-12-13 22:26:53,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1090 treesize of output 1074 [2022-12-13 22:26:53,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:53,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515324505] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:26:53,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:26:53,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 27 [2022-12-13 22:26:53,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548615478] [2022-12-13 22:26:53,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:26:53,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 22:26:53,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:26:53,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 22:26:53,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2022-12-13 22:26:53,817 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:55,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:26:55,214 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2022-12-13 22:26:55,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 22:26:55,214 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-12-13 22:26:55,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:26:55,215 INFO L225 Difference]: With dead ends: 30 [2022-12-13 22:26:55,215 INFO L226 Difference]: Without dead ends: 28 [2022-12-13 22:26:55,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=418, Invalid=1304, Unknown=0, NotChecked=0, Total=1722 [2022-12-13 22:26:55,216 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 85 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-13 22:26:55,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 47 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 133 Invalid, 1 Unknown, 0 Unchecked, 1.1s Time] [2022-12-13 22:26:55,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-13 22:26:55,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2022-12-13 22:26:55,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:55,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-12-13 22:26:55,220 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2022-12-13 22:26:55,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:26:55,220 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-12-13 22:26:55,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:55,220 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-12-13 22:26:55,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-13 22:26:55,221 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:26:55,221 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:26:55,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 22:26:55,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 22:26:55,422 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:26:55,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:26:55,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1219683633, now seen corresponding path program 4 times [2022-12-13 22:26:55,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:26:55,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416164513] [2022-12-13 22:26:55,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:26:55,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:26:55,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:26:55,524 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:55,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:26:55,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416164513] [2022-12-13 22:26:55,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416164513] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:26:55,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527084163] [2022-12-13 22:26:55,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 22:26:55,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:26:55,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:26:55,525 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:26:55,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 22:26:55,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 22:26:55,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:26:55,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 22:26:55,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:26:55,632 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:55,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:26:55,693 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:55,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527084163] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:26:55,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:26:55,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 16 [2022-12-13 22:26:55,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541453560] [2022-12-13 22:26:55,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:26:55,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 22:26:55,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:26:55,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 22:26:55,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=140, Unknown=0, NotChecked=0, Total=240 [2022-12-13 22:26:55,695 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:55,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:26:55,748 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2022-12-13 22:26:55,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 22:26:55,748 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-12-13 22:26:55,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:26:55,749 INFO L225 Difference]: With dead ends: 48 [2022-12-13 22:26:55,749 INFO L226 Difference]: Without dead ends: 28 [2022-12-13 22:26:55,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=160, Unknown=0, NotChecked=0, Total=272 [2022-12-13 22:26:55,750 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 22:26:55,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 64 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 22:26:55,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-13 22:26:55,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-12-13 22:26:55,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:55,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-12-13 22:26:55,758 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2022-12-13 22:26:55,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:26:55,758 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-12-13 22:26:55,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:55,758 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-12-13 22:26:55,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-13 22:26:55,759 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:26:55,762 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:26:55,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-13 22:26:55,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:26:55,963 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:26:55,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:26:55,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1670835535, now seen corresponding path program 5 times [2022-12-13 22:26:55,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:26:55,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610842947] [2022-12-13 22:26:55,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:26:55,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:26:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:26:56,395 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:56,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:26:56,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610842947] [2022-12-13 22:26:56,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610842947] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:26:56,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550807997] [2022-12-13 22:26:56,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 22:26:56,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:26:56,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:26:56,397 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:26:56,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 22:26:56,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 22:26:56,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:26:56,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 22:26:56,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:26:56,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 24 [2022-12-13 22:26:56,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 41 [2022-12-13 22:26:56,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 41 [2022-12-13 22:26:57,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:26:57,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:26:57,036 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:26:57,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 15 [2022-12-13 22:26:57,054 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:57,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:26:57,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2022-12-13 22:26:57,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2194 treesize of output 2162 [2022-12-13 22:26:57,421 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:57,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550807997] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:26:57,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:26:57,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 37 [2022-12-13 22:26:57,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440979470] [2022-12-13 22:26:57,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:26:57,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-13 22:26:57,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:26:57,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-13 22:26:57,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1038, Unknown=0, NotChecked=0, Total=1332 [2022-12-13 22:26:57,424 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:58,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:26:58,179 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2022-12-13 22:26:58,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 22:26:58,179 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-12-13 22:26:58,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:26:58,180 INFO L225 Difference]: With dead ends: 41 [2022-12-13 22:26:58,180 INFO L226 Difference]: Without dead ends: 39 [2022-12-13 22:26:58,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=712, Invalid=2368, Unknown=0, NotChecked=0, Total=3080 [2022-12-13 22:26:58,181 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 122 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 22:26:58,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 58 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 22:26:58,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-12-13 22:26:58,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2022-12-13 22:26:58,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:58,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-12-13 22:26:58,186 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 26 [2022-12-13 22:26:58,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:26:58,186 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-12-13 22:26:58,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:58,186 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-12-13 22:26:58,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-13 22:26:58,187 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:26:58,187 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:26:58,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 22:26:58,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-13 22:26:58,389 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:26:58,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:26:58,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1047363067, now seen corresponding path program 6 times [2022-12-13 22:26:58,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:26:58,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272630863] [2022-12-13 22:26:58,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:26:58,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:26:58,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:26:58,509 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 19 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:58,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:26:58,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272630863] [2022-12-13 22:26:58,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272630863] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:26:58,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895967991] [2022-12-13 22:26:58,510 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 22:26:58,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:26:58,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:26:58,511 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:26:58,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 22:26:58,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-13 22:26:58,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:26:58,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 22:26:58,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:26:58,665 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 32 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:58,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:26:58,747 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 32 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:58,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895967991] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:26:58,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:26:58,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 19 [2022-12-13 22:26:58,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923950299] [2022-12-13 22:26:58,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:26:58,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 22:26:58,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:26:58,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 22:26:58,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-12-13 22:26:58,749 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:58,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:26:58,820 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2022-12-13 22:26:58,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 22:26:58,821 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-12-13 22:26:58,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:26:58,821 INFO L225 Difference]: With dead ends: 58 [2022-12-13 22:26:58,821 INFO L226 Difference]: Without dead ends: 34 [2022-12-13 22:26:58,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=225, Unknown=0, NotChecked=0, Total=380 [2022-12-13 22:26:58,822 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 22:26:58,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 64 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 22:26:58,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-12-13 22:26:58,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-12-13 22:26:58,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:58,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-12-13 22:26:58,831 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2022-12-13 22:26:58,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:26:58,831 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-12-13 22:26:58,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:58,831 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-12-13 22:26:58,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-13 22:26:58,832 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:26:58,832 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:26:58,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 22:26:59,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 22:26:59,033 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:26:59,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:26:59,034 INFO L85 PathProgramCache]: Analyzing trace with hash -2041873501, now seen corresponding path program 7 times [2022-12-13 22:26:59,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:26:59,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093009819] [2022-12-13 22:26:59,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:26:59,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:26:59,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:26:59,420 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:59,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:26:59,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093009819] [2022-12-13 22:26:59,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093009819] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:26:59,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360003907] [2022-12-13 22:26:59,420 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 22:26:59,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:26:59,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:26:59,421 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:26:59,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 22:26:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:26:59,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-13 22:26:59,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:26:59,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 24 [2022-12-13 22:26:59,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 41 [2022-12-13 22:26:59,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 41 [2022-12-13 22:26:59,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 41 [2022-12-13 22:27:00,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:27:00,045 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:27:00,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 12 [2022-12-13 22:27:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:27:00,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:27:00,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2022-12-13 22:27:00,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17650 treesize of output 17394 [2022-12-13 22:27:00,497 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:27:00,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360003907] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:27:00,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:27:00,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 16] total 34 [2022-12-13 22:27:00,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125156256] [2022-12-13 22:27:00,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:27:00,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 22:27:00,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:27:00,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 22:27:00,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 22:27:00,500 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:27:01,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:27:01,272 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2022-12-13 22:27:01,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 22:27:01,272 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-12-13 22:27:01,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:27:01,273 INFO L225 Difference]: With dead ends: 42 [2022-12-13 22:27:01,273 INFO L226 Difference]: Without dead ends: 40 [2022-12-13 22:27:01,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=613, Invalid=2249, Unknown=0, NotChecked=0, Total=2862 [2022-12-13 22:27:01,274 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 95 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 22:27:01,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 105 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 22:27:01,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-13 22:27:01,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2022-12-13 22:27:01,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:27:01,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-12-13 22:27:01,280 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 32 [2022-12-13 22:27:01,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:27:01,280 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-12-13 22:27:01,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:27:01,280 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-12-13 22:27:01,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-13 22:27:01,281 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:27:01,281 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:27:01,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 22:27:01,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:27:01,483 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:27:01,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:27:01,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1072678489, now seen corresponding path program 8 times [2022-12-13 22:27:01,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:27:01,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160173368] [2022-12-13 22:27:01,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:27:01,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:27:01,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:27:01,586 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 33 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:27:01,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:27:01,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160173368] [2022-12-13 22:27:01,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160173368] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:27:01,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656397650] [2022-12-13 22:27:01,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:27:01,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:27:01,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:27:01,587 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:27:01,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 22:27:01,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 22:27:01,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:27:01,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 22:27:01,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:27:01,759 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 50 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:27:01,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:27:01,872 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 50 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:27:01,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656397650] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:27:01,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:27:01,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 22 [2022-12-13 22:27:01,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948974124] [2022-12-13 22:27:01,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:27:01,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 22:27:01,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:27:01,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 22:27:01,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=273, Unknown=0, NotChecked=0, Total=462 [2022-12-13 22:27:01,874 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:27:01,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:27:01,964 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2022-12-13 22:27:01,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 22:27:01,964 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-12-13 22:27:01,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:27:01,965 INFO L225 Difference]: With dead ends: 68 [2022-12-13 22:27:01,965 INFO L226 Difference]: Without dead ends: 40 [2022-12-13 22:27:01,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 57 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=205, Invalid=301, Unknown=0, NotChecked=0, Total=506 [2022-12-13 22:27:01,966 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 21 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 22:27:01,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 82 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 22:27:01,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-13 22:27:01,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-12-13 22:27:01,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:27:01,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-12-13 22:27:01,974 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2022-12-13 22:27:01,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:27:01,974 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-12-13 22:27:01,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:27:01,974 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-12-13 22:27:01,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-13 22:27:01,974 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:27:01,974 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:27:01,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 22:27:02,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:27:02,176 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:27:02,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:27:02,176 INFO L85 PathProgramCache]: Analyzing trace with hash 811766135, now seen corresponding path program 9 times [2022-12-13 22:27:02,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:27:02,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745673043] [2022-12-13 22:27:02,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:27:02,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:27:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:27:02,734 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 5 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:27:02,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:27:02,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745673043] [2022-12-13 22:27:02,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745673043] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:27:02,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759395014] [2022-12-13 22:27:02,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 22:27:02,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:27:02,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:27:02,736 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:27:02,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_322dcd1c-d894-40da-8994-03c8374d261a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 22:27:02,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 22:27:02,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:27:02,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-13 22:27:02,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:27:02,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 24 [2022-12-13 22:27:02,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 41 [2022-12-13 22:27:02,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 41 [2022-12-13 22:27:02,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 41 [2022-12-13 22:27:02,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 43 [2022-12-13 22:27:03,635 INFO L321 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2022-12-13 22:27:03,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 17 [2022-12-13 22:27:03,657 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:27:03,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:27:04,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 40 [2022-12-13 22:27:04,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17650 treesize of output 17394