./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 14:04:27,762 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 14:04:27,764 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 14:04:27,789 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 14:04:27,789 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 14:04:27,790 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 14:04:27,791 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 14:04:27,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 14:04:27,798 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 14:04:27,802 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 14:04:27,803 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 14:04:27,805 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 14:04:27,807 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 14:04:27,809 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 14:04:27,811 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 14:04:27,815 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 14:04:27,816 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 14:04:27,817 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 14:04:27,819 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 14:04:27,823 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 14:04:27,830 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 14:04:27,833 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 14:04:27,834 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 14:04:27,835 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 14:04:27,842 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 14:04:27,842 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 14:04:27,843 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 14:04:27,844 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 14:04:27,845 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 14:04:27,846 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 14:04:27,848 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 14:04:27,849 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 14:04:27,850 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 14:04:27,850 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 14:04:27,851 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 14:04:27,852 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 14:04:27,853 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 14:04:27,853 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 14:04:27,853 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 14:04:27,854 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 14:04:27,854 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 14:04:27,856 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 14:04:27,885 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 14:04:27,885 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 14:04:27,886 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 14:04:27,887 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 14:04:27,887 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 14:04:27,888 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 14:04:27,888 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 14:04:27,888 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 14:04:27,888 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 14:04:27,889 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 14:04:27,889 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 14:04:27,890 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 14:04:27,890 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 14:04:27,890 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 14:04:27,890 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 14:04:27,890 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 14:04:27,890 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 14:04:27,891 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 14:04:27,891 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 14:04:27,891 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 14:04:27,891 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 14:04:27,891 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 14:04:27,892 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 14:04:27,892 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 14:04:27,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:04:27,892 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 14:04:27,892 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 14:04:27,893 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 14:04:27,893 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 14:04:27,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 14:04:27,893 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 14:04:27,893 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 14:04:27,894 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 14:04:27,894 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 14:04:27,894 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 14:04:27,894 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 14:04:28,171 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 14:04:28,188 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 14:04:28,190 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 14:04:28,191 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 14:04:28,191 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 14:04:28,192 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-09-01 14:04:29,343 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 14:04:29,556 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 14:04:29,557 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-09-01 14:04:29,562 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b94d02f79/0881b0846e3a4e6fb8f86e56d8c8fde2/FLAG6ae7d5eda [2023-09-01 14:04:29,575 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b94d02f79/0881b0846e3a4e6fb8f86e56d8c8fde2 [2023-09-01 14:04:29,578 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 14:04:29,579 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 14:04:29,580 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 14:04:29,580 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 14:04:29,584 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 14:04:29,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:04:29" (1/1) ... [2023-09-01 14:04:29,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bf217fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:04:29, skipping insertion in model container [2023-09-01 14:04:29,587 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:04:29" (1/1) ... [2023-09-01 14:04:29,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 14:04:29,609 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 14:04:29,754 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2023-09-01 14:04:29,764 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:04:29,772 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 14:04:29,796 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2023-09-01 14:04:29,798 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:04:29,811 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 14:04:29,811 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 14:04:29,817 INFO L208 MainTranslator]: Completed translation [2023-09-01 14:04:29,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:04:29 WrapperNode [2023-09-01 14:04:29,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 14:04:29,819 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 14:04:29,819 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 14:04:29,820 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 14:04:29,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:04:29" (1/1) ... [2023-09-01 14:04:29,843 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:04:29" (1/1) ... [2023-09-01 14:04:29,876 INFO L138 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 168 [2023-09-01 14:04:29,877 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 14:04:29,878 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 14:04:29,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 14:04:29,879 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 14:04:29,886 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:04:29" (1/1) ... [2023-09-01 14:04:29,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:04:29" (1/1) ... [2023-09-01 14:04:29,900 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:04:29" (1/1) ... [2023-09-01 14:04:29,900 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:04:29" (1/1) ... [2023-09-01 14:04:29,909 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:04:29" (1/1) ... [2023-09-01 14:04:29,917 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:04:29" (1/1) ... [2023-09-01 14:04:29,922 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:04:29" (1/1) ... [2023-09-01 14:04:29,927 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:04:29" (1/1) ... [2023-09-01 14:04:29,929 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 14:04:29,932 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 14:04:29,933 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 14:04:29,933 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 14:04:29,933 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:04:29" (1/1) ... [2023-09-01 14:04:29,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:04:29,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:04:29,966 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 14:04:29,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 14:04:30,013 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 14:04:30,013 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 14:04:30,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 14:04:30,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 14:04:30,015 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 14:04:30,015 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 14:04:30,015 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 14:04:30,015 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 14:04:30,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 14:04:30,016 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 14:04:30,016 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 14:04:30,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 14:04:30,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 14:04:30,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 14:04:30,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 14:04:30,018 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 14:04:30,166 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 14:04:30,168 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 14:04:30,404 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 14:04:30,586 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 14:04:30,586 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 14:04:30,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:04:30 BoogieIcfgContainer [2023-09-01 14:04:30,588 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 14:04:30,589 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 14:04:30,590 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 14:04:30,594 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 14:04:30,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:04:29" (1/3) ... [2023-09-01 14:04:30,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ccc8396 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:04:30, skipping insertion in model container [2023-09-01 14:04:30,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:04:29" (2/3) ... [2023-09-01 14:04:30,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ccc8396 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:04:30, skipping insertion in model container [2023-09-01 14:04:30,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:04:30" (3/3) ... [2023-09-01 14:04:30,596 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2023-09-01 14:04:30,602 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 14:04:30,610 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 14:04:30,610 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 14:04:30,610 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 14:04:30,693 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 14:04:30,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 138 transitions, 292 flow [2023-09-01 14:04:30,785 INFO L130 PetriNetUnfolder]: 11/136 cut-off events. [2023-09-01 14:04:30,786 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:04:30,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 136 events. 11/136 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 80 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 101. Up to 3 conditions per place. [2023-09-01 14:04:30,790 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 138 transitions, 292 flow [2023-09-01 14:04:30,794 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 128 transitions, 268 flow [2023-09-01 14:04:30,796 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 14:04:30,810 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 124 places, 128 transitions, 268 flow [2023-09-01 14:04:30,812 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 124 places, 128 transitions, 268 flow [2023-09-01 14:04:30,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 128 transitions, 268 flow [2023-09-01 14:04:30,842 INFO L130 PetriNetUnfolder]: 11/128 cut-off events. [2023-09-01 14:04:30,843 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:04:30,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 128 events. 11/128 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 77 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 101. Up to 3 conditions per place. [2023-09-01 14:04:30,845 INFO L119 LiptonReduction]: Number of co-enabled transitions 690 [2023-09-01 14:04:35,106 INFO L134 LiptonReduction]: Checked pairs total: 839 [2023-09-01 14:04:35,107 INFO L136 LiptonReduction]: Total number of compositions: 133 [2023-09-01 14:04:35,119 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 14:04:35,124 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;@71005d1e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 14:04:35,124 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 14:04:35,133 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-09-01 14:04:35,133 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:04:35,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:04:35,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:04:35,134 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:04:35,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:04:35,138 INFO L85 PathProgramCache]: Analyzing trace with hash -272600085, now seen corresponding path program 1 times [2023-09-01 14:04:35,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:04:35,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401687593] [2023-09-01 14:04:35,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:04:35,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:04:35,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:04:35,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:04:35,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:04:35,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401687593] [2023-09-01 14:04:35,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401687593] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:04:35,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:04:35,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 14:04:35,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206896860] [2023-09-01 14:04:35,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:04:35,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:04:35,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:04:35,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:04:35,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:04:35,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 271 [2023-09-01 14:04:35,672 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 119.25) internal successors, (477), 4 states have internal predecessors, (477), 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) [2023-09-01 14:04:35,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:04:35,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 271 [2023-09-01 14:04:35,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:04:35,761 INFO L130 PetriNetUnfolder]: 48/91 cut-off events. [2023-09-01 14:04:35,761 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-09-01 14:04:35,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 91 events. 48/91 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 205 event pairs, 24 based on Foata normal form. 8/74 useless extension candidates. Maximal degree in co-relation 131. Up to 81 conditions per place. [2023-09-01 14:04:35,764 INFO L137 encePairwiseOnDemand]: 264/271 looper letters, 15 selfloop transitions, 2 changer transitions 6/24 dead transitions. [2023-09-01 14:04:35,765 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 24 transitions, 112 flow [2023-09-01 14:04:35,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:04:35,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:04:35,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 491 transitions. [2023-09-01 14:04:35,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45295202952029523 [2023-09-01 14:04:35,786 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 491 transitions. [2023-09-01 14:04:35,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 491 transitions. [2023-09-01 14:04:35,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:04:35,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 491 transitions. [2023-09-01 14:04:35,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.75) internal successors, (491), 4 states have internal predecessors, (491), 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) [2023-09-01 14:04:35,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 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) [2023-09-01 14:04:35,802 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 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) [2023-09-01 14:04:35,804 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 4 states and 491 transitions. [2023-09-01 14:04:35,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 24 transitions, 112 flow [2023-09-01 14:04:35,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 24 transitions, 100 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 14:04:35,808 INFO L231 Difference]: Finished difference. Result has 22 places, 18 transitions, 58 flow [2023-09-01 14:04:35,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=58, PETRI_PLACES=22, PETRI_TRANSITIONS=18} [2023-09-01 14:04:35,813 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-09-01 14:04:35,814 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 18 transitions, 58 flow [2023-09-01 14:04:35,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 119.25) internal successors, (477), 4 states have internal predecessors, (477), 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) [2023-09-01 14:04:35,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:04:35,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:04:35,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 14:04:35,818 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:04:35,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:04:35,820 INFO L85 PathProgramCache]: Analyzing trace with hash -799736851, now seen corresponding path program 1 times [2023-09-01 14:04:35,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:04:35,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025579528] [2023-09-01 14:04:35,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:04:35,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:04:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:04:36,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:04:36,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:04:36,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025579528] [2023-09-01 14:04:36,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025579528] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:04:36,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:04:36,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-09-01 14:04:36,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243724778] [2023-09-01 14:04:36,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:04:36,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 14:04:36,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:04:36,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 14:04:36,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-09-01 14:04:36,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 271 [2023-09-01 14:04:36,633 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 58 flow. Second operand has 8 states, 8 states have (on average 109.875) internal successors, (879), 8 states have internal predecessors, (879), 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) [2023-09-01 14:04:36,634 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:04:36,634 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 271 [2023-09-01 14:04:36,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:04:36,783 INFO L130 PetriNetUnfolder]: 78/140 cut-off events. [2023-09-01 14:04:36,783 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-09-01 14:04:36,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 140 events. 78/140 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 378 event pairs, 1 based on Foata normal form. 1/106 useless extension candidates. Maximal degree in co-relation 352. Up to 89 conditions per place. [2023-09-01 14:04:36,785 INFO L137 encePairwiseOnDemand]: 262/271 looper letters, 32 selfloop transitions, 13 changer transitions 5/50 dead transitions. [2023-09-01 14:04:36,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 50 transitions, 249 flow [2023-09-01 14:04:36,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 14:04:36,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 14:04:36,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 914 transitions. [2023-09-01 14:04:36,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4215867158671587 [2023-09-01 14:04:36,789 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 914 transitions. [2023-09-01 14:04:36,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 914 transitions. [2023-09-01 14:04:36,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:04:36,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 914 transitions. [2023-09-01 14:04:36,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 114.25) internal successors, (914), 8 states have internal predecessors, (914), 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) [2023-09-01 14:04:36,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 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) [2023-09-01 14:04:36,796 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 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) [2023-09-01 14:04:36,796 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 58 flow. Second operand 8 states and 914 transitions. [2023-09-01 14:04:36,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 50 transitions, 249 flow [2023-09-01 14:04:36,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 50 transitions, 245 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 14:04:36,798 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 147 flow [2023-09-01 14:04:36,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=147, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2023-09-01 14:04:36,799 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-09-01 14:04:36,799 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 147 flow [2023-09-01 14:04:36,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 109.875) internal successors, (879), 8 states have internal predecessors, (879), 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) [2023-09-01 14:04:36,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:04:36,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:04:36,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 14:04:36,801 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:04:36,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:04:36,801 INFO L85 PathProgramCache]: Analyzing trace with hash 143763307, now seen corresponding path program 2 times [2023-09-01 14:04:36,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:04:36,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188691592] [2023-09-01 14:04:36,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:04:36,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:04:36,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:04:37,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:04:37,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:04:37,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188691592] [2023-09-01 14:04:37,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188691592] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:04:37,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:04:37,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-09-01 14:04:37,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556478195] [2023-09-01 14:04:37,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:04:37,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 14:04:37,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:04:37,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 14:04:37,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-09-01 14:04:37,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 271 [2023-09-01 14:04:37,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 147 flow. Second operand has 8 states, 8 states have (on average 108.875) internal successors, (871), 8 states have internal predecessors, (871), 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) [2023-09-01 14:04:37,291 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:04:37,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 271 [2023-09-01 14:04:37,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:04:37,424 INFO L130 PetriNetUnfolder]: 88/156 cut-off events. [2023-09-01 14:04:37,424 INFO L131 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2023-09-01 14:04:37,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 156 events. 88/156 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 408 event pairs, 9 based on Foata normal form. 1/127 useless extension candidates. Maximal degree in co-relation 559. Up to 120 conditions per place. [2023-09-01 14:04:37,429 INFO L137 encePairwiseOnDemand]: 262/271 looper letters, 29 selfloop transitions, 17 changer transitions 5/51 dead transitions. [2023-09-01 14:04:37,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 51 transitions, 345 flow [2023-09-01 14:04:37,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 14:04:37,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 14:04:37,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 901 transitions. [2023-09-01 14:04:37,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41559040590405905 [2023-09-01 14:04:37,433 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 901 transitions. [2023-09-01 14:04:37,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 901 transitions. [2023-09-01 14:04:37,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:04:37,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 901 transitions. [2023-09-01 14:04:37,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 112.625) internal successors, (901), 8 states have internal predecessors, (901), 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) [2023-09-01 14:04:37,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 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) [2023-09-01 14:04:37,440 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 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) [2023-09-01 14:04:37,440 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 147 flow. Second operand 8 states and 901 transitions. [2023-09-01 14:04:37,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 51 transitions, 345 flow [2023-09-01 14:04:37,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 51 transitions, 299 flow, removed 22 selfloop flow, removed 2 redundant places. [2023-09-01 14:04:37,445 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 222 flow [2023-09-01 14:04:37,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=222, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-09-01 14:04:37,447 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 18 predicate places. [2023-09-01 14:04:37,449 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 222 flow [2023-09-01 14:04:37,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 108.875) internal successors, (871), 8 states have internal predecessors, (871), 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) [2023-09-01 14:04:37,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:04:37,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:04:37,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 14:04:37,451 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:04:37,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:04:37,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1615625679, now seen corresponding path program 3 times [2023-09-01 14:04:37,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:04:37,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607578813] [2023-09-01 14:04:37,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:04:37,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:04:37,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:04:37,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:04:37,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:04:37,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607578813] [2023-09-01 14:04:37,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607578813] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:04:37,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:04:37,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 14:04:37,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508503161] [2023-09-01 14:04:37,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:04:37,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 14:04:37,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:04:37,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 14:04:37,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 14:04:37,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 271 [2023-09-01 14:04:37,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 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) [2023-09-01 14:04:37,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:04:37,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 271 [2023-09-01 14:04:37,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:04:37,618 INFO L130 PetriNetUnfolder]: 63/119 cut-off events. [2023-09-01 14:04:37,619 INFO L131 PetriNetUnfolder]: For 122/125 co-relation queries the response was YES. [2023-09-01 14:04:37,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 119 events. 63/119 cut-off events. For 122/125 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 297 event pairs, 10 based on Foata normal form. 9/108 useless extension candidates. Maximal degree in co-relation 435. Up to 103 conditions per place. [2023-09-01 14:04:37,620 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 25 selfloop transitions, 7 changer transitions 0/34 dead transitions. [2023-09-01 14:04:37,620 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 243 flow [2023-09-01 14:04:37,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 14:04:37,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 14:04:37,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 378 transitions. [2023-09-01 14:04:37,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46494464944649444 [2023-09-01 14:04:37,627 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 378 transitions. [2023-09-01 14:04:37,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 378 transitions. [2023-09-01 14:04:37,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:04:37,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 378 transitions. [2023-09-01 14:04:37,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 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) [2023-09-01 14:04:37,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 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) [2023-09-01 14:04:37,630 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 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) [2023-09-01 14:04:37,630 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 222 flow. Second operand 3 states and 378 transitions. [2023-09-01 14:04:37,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 243 flow [2023-09-01 14:04:37,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 34 transitions, 222 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-09-01 14:04:37,636 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 165 flow [2023-09-01 14:04:37,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-09-01 14:04:37,638 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2023-09-01 14:04:37,638 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 165 flow [2023-09-01 14:04:37,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 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) [2023-09-01 14:04:37,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:04:37,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:04:37,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 14:04:37,639 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:04:37,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:04:37,640 INFO L85 PathProgramCache]: Analyzing trace with hash 2042112127, now seen corresponding path program 4 times [2023-09-01 14:04:37,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:04:37,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884141539] [2023-09-01 14:04:37,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:04:37,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:04:37,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:04:38,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:04:38,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:04:38,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884141539] [2023-09-01 14:04:38,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884141539] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:04:38,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:04:38,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-09-01 14:04:38,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390035974] [2023-09-01 14:04:38,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:04:38,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 14:04:38,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:04:38,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 14:04:38,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-09-01 14:04:38,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 271 [2023-09-01 14:04:38,101 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 165 flow. Second operand has 8 states, 8 states have (on average 108.875) internal successors, (871), 8 states have internal predecessors, (871), 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) [2023-09-01 14:04:38,101 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:04:38,102 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 271 [2023-09-01 14:04:38,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:04:38,204 INFO L130 PetriNetUnfolder]: 66/130 cut-off events. [2023-09-01 14:04:38,205 INFO L131 PetriNetUnfolder]: For 107/107 co-relation queries the response was YES. [2023-09-01 14:04:38,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 466 conditions, 130 events. 66/130 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 353 event pairs, 11 based on Foata normal form. 1/113 useless extension candidates. Maximal degree in co-relation 442. Up to 94 conditions per place. [2023-09-01 14:04:38,206 INFO L137 encePairwiseOnDemand]: 262/271 looper letters, 29 selfloop transitions, 12 changer transitions 5/46 dead transitions. [2023-09-01 14:04:38,206 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 46 transitions, 296 flow [2023-09-01 14:04:38,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 14:04:38,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 14:04:38,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 896 transitions. [2023-09-01 14:04:38,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4132841328413284 [2023-09-01 14:04:38,209 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 896 transitions. [2023-09-01 14:04:38,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 896 transitions. [2023-09-01 14:04:38,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:04:38,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 896 transitions. [2023-09-01 14:04:38,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 112.0) internal successors, (896), 8 states have internal predecessors, (896), 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) [2023-09-01 14:04:38,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 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) [2023-09-01 14:04:38,215 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 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) [2023-09-01 14:04:38,215 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 165 flow. Second operand 8 states and 896 transitions. [2023-09-01 14:04:38,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 46 transitions, 296 flow [2023-09-01 14:04:38,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 46 transitions, 282 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 14:04:38,218 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 185 flow [2023-09-01 14:04:38,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=185, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2023-09-01 14:04:38,219 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 21 predicate places. [2023-09-01 14:04:38,219 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 185 flow [2023-09-01 14:04:38,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 108.875) internal successors, (871), 8 states have internal predecessors, (871), 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) [2023-09-01 14:04:38,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:04:38,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:04:38,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 14:04:38,220 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:04:38,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:04:38,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1023024236, now seen corresponding path program 1 times [2023-09-01 14:04:38,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:04:38,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871416288] [2023-09-01 14:04:38,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:04:38,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:04:38,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:04:38,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:04:38,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:04:38,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871416288] [2023-09-01 14:04:38,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871416288] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:04:38,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558866048] [2023-09-01 14:04:38,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:04:38,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:04:38,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:04:38,343 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:04:38,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 14:04:38,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:04:38,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 14:04:38,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:04:38,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:04:38,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:04:38,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:04:38,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558866048] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:04:38,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:04:38,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-09-01 14:04:38,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655550215] [2023-09-01 14:04:38,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:04:38,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 14:04:38,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:04:38,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 14:04:38,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-09-01 14:04:38,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 271 [2023-09-01 14:04:38,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 185 flow. Second operand has 12 states, 12 states have (on average 114.08333333333333) internal successors, (1369), 12 states have internal predecessors, (1369), 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) [2023-09-01 14:04:38,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:04:38,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 271 [2023-09-01 14:04:38,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:04:38,777 INFO L130 PetriNetUnfolder]: 98/203 cut-off events. [2023-09-01 14:04:38,777 INFO L131 PetriNetUnfolder]: For 311/325 co-relation queries the response was YES. [2023-09-01 14:04:38,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 776 conditions, 203 events. 98/203 cut-off events. For 311/325 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 697 event pairs, 36 based on Foata normal form. 14/197 useless extension candidates. Maximal degree in co-relation 757. Up to 112 conditions per place. [2023-09-01 14:04:38,779 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 46 selfloop transitions, 7 changer transitions 4/59 dead transitions. [2023-09-01 14:04:38,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 451 flow [2023-09-01 14:04:38,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 14:04:38,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 14:04:38,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 710 transitions. [2023-09-01 14:04:38,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43665436654366546 [2023-09-01 14:04:38,782 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 710 transitions. [2023-09-01 14:04:38,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 710 transitions. [2023-09-01 14:04:38,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:04:38,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 710 transitions. [2023-09-01 14:04:38,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 118.33333333333333) internal successors, (710), 6 states have internal predecessors, (710), 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) [2023-09-01 14:04:38,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 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) [2023-09-01 14:04:38,806 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 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) [2023-09-01 14:04:38,806 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 185 flow. Second operand 6 states and 710 transitions. [2023-09-01 14:04:38,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 451 flow [2023-09-01 14:04:38,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 59 transitions, 401 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-09-01 14:04:38,808 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 238 flow [2023-09-01 14:04:38,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=238, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2023-09-01 14:04:38,809 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-09-01 14:04:38,809 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 238 flow [2023-09-01 14:04:38,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 114.08333333333333) internal successors, (1369), 12 states have internal predecessors, (1369), 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) [2023-09-01 14:04:38,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:04:38,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:04:38,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 14:04:39,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-09-01 14:04:39,017 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:04:39,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:04:39,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1249123538, now seen corresponding path program 1 times [2023-09-01 14:04:39,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:04:39,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111118084] [2023-09-01 14:04:39,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:04:39,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:04:39,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:04:39,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:04:39,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:04:39,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111118084] [2023-09-01 14:04:39,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111118084] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:04:39,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:04:39,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 14:04:39,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595291309] [2023-09-01 14:04:39,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:04:39,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:04:39,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:04:39,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:04:39,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-09-01 14:04:39,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 271 [2023-09-01 14:04:39,146 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 238 flow. Second operand has 5 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 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) [2023-09-01 14:04:39,146 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:04:39,146 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 271 [2023-09-01 14:04:39,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:04:39,223 INFO L130 PetriNetUnfolder]: 109/232 cut-off events. [2023-09-01 14:04:39,223 INFO L131 PetriNetUnfolder]: For 320/334 co-relation queries the response was YES. [2023-09-01 14:04:39,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 872 conditions, 232 events. 109/232 cut-off events. For 320/334 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 828 event pairs, 15 based on Foata normal form. 16/216 useless extension candidates. Maximal degree in co-relation 646. Up to 83 conditions per place. [2023-09-01 14:04:39,225 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 34 selfloop transitions, 10 changer transitions 11/57 dead transitions. [2023-09-01 14:04:39,225 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 432 flow [2023-09-01 14:04:39,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:04:39,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:04:39,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 512 transitions. [2023-09-01 14:04:39,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47232472324723246 [2023-09-01 14:04:39,228 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 512 transitions. [2023-09-01 14:04:39,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 512 transitions. [2023-09-01 14:04:39,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:04:39,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 512 transitions. [2023-09-01 14:04:39,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 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) [2023-09-01 14:04:39,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 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) [2023-09-01 14:04:39,232 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 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) [2023-09-01 14:04:39,232 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 238 flow. Second operand 4 states and 512 transitions. [2023-09-01 14:04:39,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 432 flow [2023-09-01 14:04:39,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 407 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-09-01 14:04:39,235 INFO L231 Difference]: Finished difference. Result has 45 places, 31 transitions, 214 flow [2023-09-01 14:04:39,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=214, PETRI_PLACES=45, PETRI_TRANSITIONS=31} [2023-09-01 14:04:39,236 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 24 predicate places. [2023-09-01 14:04:39,236 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 31 transitions, 214 flow [2023-09-01 14:04:39,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 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) [2023-09-01 14:04:39,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:04:39,237 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:04:39,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 14:04:39,237 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:04:39,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:04:39,238 INFO L85 PathProgramCache]: Analyzing trace with hash 935567924, now seen corresponding path program 2 times [2023-09-01 14:04:39,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:04:39,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848565288] [2023-09-01 14:04:39,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:04:39,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:04:39,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:04:39,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:04:39,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:04:39,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848565288] [2023-09-01 14:04:39,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848565288] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:04:39,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649006447] [2023-09-01 14:04:39,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:04:39,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:04:39,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:04:39,731 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:04:39,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 14:04:39,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:04:39,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:04:39,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 14:04:39,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:04:40,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:04:40,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:04:40,135 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 14:04:40,136 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 25 treesize of output 12 [2023-09-01 14:04:40,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:04:40,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649006447] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:04:40,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:04:40,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2023-09-01 14:04:40,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064477908] [2023-09-01 14:04:40,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:04:40,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 14:04:40,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:04:40,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 14:04:40,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2023-09-01 14:04:40,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 271 [2023-09-01 14:04:40,643 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 31 transitions, 214 flow. Second operand has 20 states, 20 states have (on average 105.95) internal successors, (2119), 20 states have internal predecessors, (2119), 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) [2023-09-01 14:04:40,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:04:40,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 271 [2023-09-01 14:04:40,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:04:41,222 INFO L130 PetriNetUnfolder]: 261/504 cut-off events. [2023-09-01 14:04:41,223 INFO L131 PetriNetUnfolder]: For 771/785 co-relation queries the response was YES. [2023-09-01 14:04:41,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2219 conditions, 504 events. 261/504 cut-off events. For 771/785 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2184 event pairs, 30 based on Foata normal form. 6/389 useless extension candidates. Maximal degree in co-relation 1540. Up to 263 conditions per place. [2023-09-01 14:04:41,227 INFO L137 encePairwiseOnDemand]: 263/271 looper letters, 92 selfloop transitions, 49 changer transitions 0/143 dead transitions. [2023-09-01 14:04:41,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 143 transitions, 1152 flow [2023-09-01 14:04:41,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 14:04:41,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 14:04:41,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2093 transitions. [2023-09-01 14:04:41,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40648669644591184 [2023-09-01 14:04:41,232 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2093 transitions. [2023-09-01 14:04:41,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2093 transitions. [2023-09-01 14:04:41,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:04:41,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2093 transitions. [2023-09-01 14:04:41,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 110.15789473684211) internal successors, (2093), 19 states have internal predecessors, (2093), 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) [2023-09-01 14:04:41,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 271.0) internal successors, (5420), 20 states have internal predecessors, (5420), 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) [2023-09-01 14:04:41,246 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 271.0) internal successors, (5420), 20 states have internal predecessors, (5420), 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) [2023-09-01 14:04:41,246 INFO L175 Difference]: Start difference. First operand has 45 places, 31 transitions, 214 flow. Second operand 19 states and 2093 transitions. [2023-09-01 14:04:41,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 143 transitions, 1152 flow [2023-09-01 14:04:41,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 143 transitions, 959 flow, removed 93 selfloop flow, removed 3 redundant places. [2023-09-01 14:04:41,251 INFO L231 Difference]: Finished difference. Result has 63 places, 83 transitions, 708 flow [2023-09-01 14:04:41,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=708, PETRI_PLACES=63, PETRI_TRANSITIONS=83} [2023-09-01 14:04:41,252 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 42 predicate places. [2023-09-01 14:04:41,252 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 83 transitions, 708 flow [2023-09-01 14:04:41,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 105.95) internal successors, (2119), 20 states have internal predecessors, (2119), 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) [2023-09-01 14:04:41,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:04:41,254 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:04:41,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 14:04:41,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-09-01 14:04:41,465 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:04:41,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:04:41,466 INFO L85 PathProgramCache]: Analyzing trace with hash -912937574, now seen corresponding path program 3 times [2023-09-01 14:04:41,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:04:41,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822461491] [2023-09-01 14:04:41,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:04:41,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:04:41,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:04:41,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:04:41,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:04:41,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822461491] [2023-09-01 14:04:41,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822461491] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:04:41,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002344682] [2023-09-01 14:04:41,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:04:41,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:04:41,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:04:41,953 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:04:41,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 14:04:42,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 14:04:42,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:04:42,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 38 conjunts are in the unsatisfiable core [2023-09-01 14:04:42,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:04:42,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:04:42,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 14:04:42,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:04:42,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:04:42,462 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:04:42,463 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 45 treesize of output 37 [2023-09-01 14:04:42,468 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 24 treesize of output 18 [2023-09-01 14:04:42,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:04:42,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002344682] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:04:42,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:04:42,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2023-09-01 14:04:42,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913822833] [2023-09-01 14:04:42,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:04:42,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 14:04:42,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:04:42,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 14:04:42,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=503, Unknown=2, NotChecked=0, Total=600 [2023-09-01 14:04:43,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 271 [2023-09-01 14:04:43,448 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 83 transitions, 708 flow. Second operand has 25 states, 25 states have (on average 82.72) internal successors, (2068), 25 states have internal predecessors, (2068), 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) [2023-09-01 14:04:43,448 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:04:43,448 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 271 [2023-09-01 14:04:43,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:04:45,371 INFO L130 PetriNetUnfolder]: 506/972 cut-off events. [2023-09-01 14:04:45,371 INFO L131 PetriNetUnfolder]: For 3068/3068 co-relation queries the response was YES. [2023-09-01 14:04:45,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4513 conditions, 972 events. 506/972 cut-off events. For 3068/3068 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4911 event pairs, 50 based on Foata normal form. 34/943 useless extension candidates. Maximal degree in co-relation 3660. Up to 357 conditions per place. [2023-09-01 14:04:45,379 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 150 selfloop transitions, 104 changer transitions 2/256 dead transitions. [2023-09-01 14:04:45,379 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 256 transitions, 2421 flow [2023-09-01 14:04:45,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-09-01 14:04:45,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-09-01 14:04:45,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2425 transitions. [2023-09-01 14:04:45,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3195835529783869 [2023-09-01 14:04:45,388 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2425 transitions. [2023-09-01 14:04:45,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2425 transitions. [2023-09-01 14:04:45,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:04:45,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2425 transitions. [2023-09-01 14:04:45,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 86.60714285714286) internal successors, (2425), 28 states have internal predecessors, (2425), 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) [2023-09-01 14:04:45,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 271.0) internal successors, (7859), 29 states have internal predecessors, (7859), 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) [2023-09-01 14:04:45,405 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 271.0) internal successors, (7859), 29 states have internal predecessors, (7859), 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) [2023-09-01 14:04:45,406 INFO L175 Difference]: Start difference. First operand has 63 places, 83 transitions, 708 flow. Second operand 28 states and 2425 transitions. [2023-09-01 14:04:45,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 256 transitions, 2421 flow [2023-09-01 14:04:45,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 256 transitions, 2240 flow, removed 81 selfloop flow, removed 3 redundant places. [2023-09-01 14:04:45,426 INFO L231 Difference]: Finished difference. Result has 101 places, 163 transitions, 1768 flow [2023-09-01 14:04:45,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1768, PETRI_PLACES=101, PETRI_TRANSITIONS=163} [2023-09-01 14:04:45,428 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 80 predicate places. [2023-09-01 14:04:45,428 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 163 transitions, 1768 flow [2023-09-01 14:04:45,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 82.72) internal successors, (2068), 25 states have internal predecessors, (2068), 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) [2023-09-01 14:04:45,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:04:45,429 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:04:45,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 14:04:45,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:04:45,645 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:04:45,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:04:45,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1416627676, now seen corresponding path program 4 times [2023-09-01 14:04:45,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:04:45,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108818474] [2023-09-01 14:04:45,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:04:45,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:04:45,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:04:46,295 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:04:46,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:04:46,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108818474] [2023-09-01 14:04:46,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108818474] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:04:46,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245638335] [2023-09-01 14:04:46,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:04:46,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:04:46,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:04:46,301 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:04:46,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 14:04:46,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:04:46,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:04:46,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 14:04:46,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:04:46,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:04:46,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:04:46,552 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 14:04:46,553 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 25 treesize of output 12 [2023-09-01 14:04:46,609 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:04:46,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245638335] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 14:04:46,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 14:04:46,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 7] total 19 [2023-09-01 14:04:46,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617211407] [2023-09-01 14:04:46,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:04:46,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 14:04:46,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:04:46,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 14:04:46,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2023-09-01 14:04:46,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 271 [2023-09-01 14:04:46,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 163 transitions, 1768 flow. Second operand has 6 states, 6 states have (on average 109.66666666666667) internal successors, (658), 6 states have internal predecessors, (658), 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) [2023-09-01 14:04:46,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:04:46,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 271 [2023-09-01 14:04:46,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:04:46,883 INFO L130 PetriNetUnfolder]: 503/943 cut-off events. [2023-09-01 14:04:46,884 INFO L131 PetriNetUnfolder]: For 5747/5747 co-relation queries the response was YES. [2023-09-01 14:04:46,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5172 conditions, 943 events. 503/943 cut-off events. For 5747/5747 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4608 event pairs, 86 based on Foata normal form. 2/945 useless extension candidates. Maximal degree in co-relation 5136. Up to 403 conditions per place. [2023-09-01 14:04:46,894 INFO L137 encePairwiseOnDemand]: 265/271 looper letters, 119 selfloop transitions, 64 changer transitions 1/184 dead transitions. [2023-09-01 14:04:46,894 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 184 transitions, 2292 flow [2023-09-01 14:04:46,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 14:04:46,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 14:04:46,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 683 transitions. [2023-09-01 14:04:46,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4200492004920049 [2023-09-01 14:04:46,897 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 683 transitions. [2023-09-01 14:04:46,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 683 transitions. [2023-09-01 14:04:46,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:04:46,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 683 transitions. [2023-09-01 14:04:46,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 113.83333333333333) internal successors, (683), 6 states have internal predecessors, (683), 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) [2023-09-01 14:04:46,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 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) [2023-09-01 14:04:46,901 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 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) [2023-09-01 14:04:46,902 INFO L175 Difference]: Start difference. First operand has 101 places, 163 transitions, 1768 flow. Second operand 6 states and 683 transitions. [2023-09-01 14:04:46,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 184 transitions, 2292 flow [2023-09-01 14:04:46,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 184 transitions, 2052 flow, removed 113 selfloop flow, removed 6 redundant places. [2023-09-01 14:04:46,931 INFO L231 Difference]: Finished difference. Result has 98 places, 164 transitions, 1728 flow [2023-09-01 14:04:46,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=1462, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1728, PETRI_PLACES=98, PETRI_TRANSITIONS=164} [2023-09-01 14:04:46,932 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 77 predicate places. [2023-09-01 14:04:46,932 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 164 transitions, 1728 flow [2023-09-01 14:04:46,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 109.66666666666667) internal successors, (658), 6 states have internal predecessors, (658), 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) [2023-09-01 14:04:46,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:04:46,933 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:04:46,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 14:04:47,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:04:47,139 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:04:47,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:04:47,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1886042083, now seen corresponding path program 1 times [2023-09-01 14:04:47,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:04:47,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440935071] [2023-09-01 14:04:47,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:04:47,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:04:47,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:04:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:04:47,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:04:47,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440935071] [2023-09-01 14:04:47,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440935071] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:04:47,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715015637] [2023-09-01 14:04:47,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:04:47,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:04:47,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:04:47,994 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:04:48,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 14:04:48,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:04:48,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 52 conjunts are in the unsatisfiable core [2023-09-01 14:04:48,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:04:48,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:04:48,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:04:48,726 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:04:48,727 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 40 treesize of output 32 [2023-09-01 14:04:49,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:04:49,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715015637] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:04:49,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:04:49,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 27 [2023-09-01 14:04:49,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325116904] [2023-09-01 14:04:49,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:04:49,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 14:04:49,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:04:49,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 14:04:49,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2023-09-01 14:04:50,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 271 [2023-09-01 14:04:50,597 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 164 transitions, 1728 flow. Second operand has 29 states, 29 states have (on average 91.82758620689656) internal successors, (2663), 29 states have internal predecessors, (2663), 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) [2023-09-01 14:04:50,597 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:04:50,597 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 271 [2023-09-01 14:04:50,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:04:53,494 INFO L130 PetriNetUnfolder]: 539/1015 cut-off events. [2023-09-01 14:04:53,495 INFO L131 PetriNetUnfolder]: For 6979/6979 co-relation queries the response was YES. [2023-09-01 14:04:53,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5600 conditions, 1015 events. 539/1015 cut-off events. For 6979/6979 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5132 event pairs, 75 based on Foata normal form. 2/1017 useless extension candidates. Maximal degree in co-relation 5564. Up to 497 conditions per place. [2023-09-01 14:04:53,504 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 136 selfloop transitions, 83 changer transitions 7/226 dead transitions. [2023-09-01 14:04:53,504 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 226 transitions, 2636 flow [2023-09-01 14:04:53,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 14:04:53,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 14:04:53,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1892 transitions. [2023-09-01 14:04:53,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34907749077490774 [2023-09-01 14:04:53,509 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1892 transitions. [2023-09-01 14:04:53,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1892 transitions. [2023-09-01 14:04:53,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:04:53,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1892 transitions. [2023-09-01 14:04:53,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 94.6) internal successors, (1892), 20 states have internal predecessors, (1892), 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) [2023-09-01 14:04:53,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 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) [2023-09-01 14:04:53,522 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 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) [2023-09-01 14:04:53,522 INFO L175 Difference]: Start difference. First operand has 98 places, 164 transitions, 1728 flow. Second operand 20 states and 1892 transitions. [2023-09-01 14:04:53,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 226 transitions, 2636 flow [2023-09-01 14:04:53,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 226 transitions, 2604 flow, removed 11 selfloop flow, removed 1 redundant places. [2023-09-01 14:04:53,552 INFO L231 Difference]: Finished difference. Result has 123 places, 180 transitions, 2111 flow [2023-09-01 14:04:53,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=1700, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2111, PETRI_PLACES=123, PETRI_TRANSITIONS=180} [2023-09-01 14:04:53,553 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 102 predicate places. [2023-09-01 14:04:53,553 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 180 transitions, 2111 flow [2023-09-01 14:04:53,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 91.82758620689656) internal successors, (2663), 29 states have internal predecessors, (2663), 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) [2023-09-01 14:04:53,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:04:53,555 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:04:53,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 14:04:53,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-09-01 14:04:53,761 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:04:53,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:04:53,762 INFO L85 PathProgramCache]: Analyzing trace with hash 2035982271, now seen corresponding path program 2 times [2023-09-01 14:04:53,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:04:53,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748097397] [2023-09-01 14:04:53,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:04:53,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:04:53,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:04:54,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:04:54,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:04:54,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748097397] [2023-09-01 14:04:54,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748097397] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:04:54,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048897973] [2023-09-01 14:04:54,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:04:54,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:04:54,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:04:54,619 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:04:54,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 14:04:54,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:04:54,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:04:54,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 57 conjunts are in the unsatisfiable core [2023-09-01 14:04:54,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:04:55,145 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 12 treesize of output 3 [2023-09-01 14:04:55,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:04:55,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:04:55,611 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:04:55,611 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 40 treesize of output 32 [2023-09-01 14:04:55,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:04:55,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048897973] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:04:55,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:04:55,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 26 [2023-09-01 14:04:55,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23094918] [2023-09-01 14:04:55,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:04:55,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 14:04:55,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:04:55,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 14:04:55,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2023-09-01 14:04:57,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 271 [2023-09-01 14:04:57,307 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 180 transitions, 2111 flow. Second operand has 28 states, 28 states have (on average 91.89285714285714) internal successors, (2573), 28 states have internal predecessors, (2573), 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) [2023-09-01 14:04:57,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:04:57,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 271 [2023-09-01 14:04:57,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:04:58,276 INFO L130 PetriNetUnfolder]: 598/1158 cut-off events. [2023-09-01 14:04:58,276 INFO L131 PetriNetUnfolder]: For 9311/9311 co-relation queries the response was YES. [2023-09-01 14:04:58,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6864 conditions, 1158 events. 598/1158 cut-off events. For 9311/9311 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6291 event pairs, 52 based on Foata normal form. 2/1160 useless extension candidates. Maximal degree in co-relation 6820. Up to 856 conditions per place. [2023-09-01 14:04:58,287 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 174 selfloop transitions, 76 changer transitions 6/256 dead transitions. [2023-09-01 14:04:58,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 256 transitions, 3098 flow [2023-09-01 14:04:58,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 14:04:58,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 14:04:58,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2001 transitions. [2023-09-01 14:04:58,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35160780179230366 [2023-09-01 14:04:58,292 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2001 transitions. [2023-09-01 14:04:58,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2001 transitions. [2023-09-01 14:04:58,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:04:58,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2001 transitions. [2023-09-01 14:04:58,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 95.28571428571429) internal successors, (2001), 21 states have internal predecessors, (2001), 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) [2023-09-01 14:04:58,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 271.0) internal successors, (5962), 22 states have internal predecessors, (5962), 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) [2023-09-01 14:04:58,303 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 271.0) internal successors, (5962), 22 states have internal predecessors, (5962), 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) [2023-09-01 14:04:58,303 INFO L175 Difference]: Start difference. First operand has 123 places, 180 transitions, 2111 flow. Second operand 21 states and 2001 transitions. [2023-09-01 14:04:58,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 256 transitions, 3098 flow [2023-09-01 14:04:58,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 256 transitions, 3019 flow, removed 22 selfloop flow, removed 7 redundant places. [2023-09-01 14:04:58,343 INFO L231 Difference]: Finished difference. Result has 142 places, 202 transitions, 2525 flow [2023-09-01 14:04:58,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=2034, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2525, PETRI_PLACES=142, PETRI_TRANSITIONS=202} [2023-09-01 14:04:58,344 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 121 predicate places. [2023-09-01 14:04:58,344 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 202 transitions, 2525 flow [2023-09-01 14:04:58,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 91.89285714285714) internal successors, (2573), 28 states have internal predecessors, (2573), 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) [2023-09-01 14:04:58,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:04:58,346 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:04:58,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-09-01 14:04:58,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:04:58,553 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:04:58,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:04:58,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1472029166, now seen corresponding path program 5 times [2023-09-01 14:04:58,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:04:58,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676719021] [2023-09-01 14:04:58,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:04:58,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:04:58,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:04:59,289 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:04:59,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:04:59,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676719021] [2023-09-01 14:04:59,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676719021] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:04:59,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738504236] [2023-09-01 14:04:59,290 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:04:59,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:04:59,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:04:59,291 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:04:59,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 14:04:59,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 14:04:59,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:04:59,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 35 conjunts are in the unsatisfiable core [2023-09-01 14:04:59,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:04:59,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:04:59,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 14:04:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:04:59,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:04:59,582 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_332 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_332) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset)) 0))) is different from false [2023-09-01 14:04:59,596 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:04:59,596 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 45 treesize of output 37 [2023-09-01 14:04:59,600 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 24 treesize of output 18 [2023-09-01 14:04:59,697 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:04:59,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738504236] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:04:59,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:04:59,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 21 [2023-09-01 14:04:59,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443286273] [2023-09-01 14:04:59,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:04:59,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 14:04:59,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:04:59,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 14:04:59,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=360, Unknown=1, NotChecked=38, Total=462 [2023-09-01 14:04:59,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 271 [2023-09-01 14:04:59,713 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 202 transitions, 2525 flow. Second operand has 22 states, 22 states have (on average 83.0909090909091) internal successors, (1828), 22 states have internal predecessors, (1828), 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) [2023-09-01 14:04:59,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:04:59,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 271 [2023-09-01 14:04:59,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:05:00,945 INFO L130 PetriNetUnfolder]: 717/1365 cut-off events. [2023-09-01 14:05:00,946 INFO L131 PetriNetUnfolder]: For 14585/14585 co-relation queries the response was YES. [2023-09-01 14:05:00,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8683 conditions, 1365 events. 717/1365 cut-off events. For 14585/14585 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 7598 event pairs, 56 based on Foata normal form. 16/1381 useless extension candidates. Maximal degree in co-relation 8632. Up to 417 conditions per place. [2023-09-01 14:05:00,961 INFO L137 encePairwiseOnDemand]: 263/271 looper letters, 155 selfloop transitions, 136 changer transitions 2/293 dead transitions. [2023-09-01 14:05:00,962 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 293 transitions, 4017 flow [2023-09-01 14:05:00,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 14:05:00,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 14:05:00,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1633 transitions. [2023-09-01 14:05:00,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31714896096329387 [2023-09-01 14:05:00,966 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1633 transitions. [2023-09-01 14:05:00,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1633 transitions. [2023-09-01 14:05:00,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:05:00,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1633 transitions. [2023-09-01 14:05:00,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 85.94736842105263) internal successors, (1633), 19 states have internal predecessors, (1633), 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) [2023-09-01 14:05:00,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 271.0) internal successors, (5420), 20 states have internal predecessors, (5420), 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) [2023-09-01 14:05:00,975 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 271.0) internal successors, (5420), 20 states have internal predecessors, (5420), 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) [2023-09-01 14:05:00,975 INFO L175 Difference]: Start difference. First operand has 142 places, 202 transitions, 2525 flow. Second operand 19 states and 1633 transitions. [2023-09-01 14:05:00,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 293 transitions, 4017 flow [2023-09-01 14:05:01,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 293 transitions, 3858 flow, removed 41 selfloop flow, removed 10 redundant places. [2023-09-01 14:05:01,050 INFO L231 Difference]: Finished difference. Result has 154 places, 234 transitions, 3280 flow [2023-09-01 14:05:01,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=2399, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3280, PETRI_PLACES=154, PETRI_TRANSITIONS=234} [2023-09-01 14:05:01,052 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 133 predicate places. [2023-09-01 14:05:01,052 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 234 transitions, 3280 flow [2023-09-01 14:05:01,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 83.0909090909091) internal successors, (1828), 22 states have internal predecessors, (1828), 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) [2023-09-01 14:05:01,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:05:01,053 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:05:01,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 14:05:01,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:05:01,259 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:05:01,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:05:01,259 INFO L85 PathProgramCache]: Analyzing trace with hash 154671513, now seen corresponding path program 3 times [2023-09-01 14:05:01,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:05:01,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333290831] [2023-09-01 14:05:01,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:05:01,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:05:01,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:05:01,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:05:01,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:05:01,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333290831] [2023-09-01 14:05:01,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333290831] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:05:01,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124243003] [2023-09-01 14:05:01,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:05:01,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:05:01,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:05:01,997 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:05:02,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 14:05:02,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 14:05:02,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:05:02,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 47 conjunts are in the unsatisfiable core [2023-09-01 14:05:02,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:05:02,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:05:02,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:05:03,039 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:05:03,039 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 40 treesize of output 32 [2023-09-01 14:05:03,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:05:03,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124243003] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:05:03,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:05:03,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 25 [2023-09-01 14:05:03,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289834533] [2023-09-01 14:05:03,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:05:03,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 14:05:03,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:05:03,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 14:05:03,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2023-09-01 14:05:04,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 271 [2023-09-01 14:05:04,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 234 transitions, 3280 flow. Second operand has 27 states, 27 states have (on average 91.96296296296296) internal successors, (2483), 27 states have internal predecessors, (2483), 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) [2023-09-01 14:05:04,456 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:05:04,456 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 271 [2023-09-01 14:05:04,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:05:05,244 INFO L130 PetriNetUnfolder]: 724/1390 cut-off events. [2023-09-01 14:05:05,244 INFO L131 PetriNetUnfolder]: For 16455/16455 co-relation queries the response was YES. [2023-09-01 14:05:05,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9474 conditions, 1390 events. 724/1390 cut-off events. For 16455/16455 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 7851 event pairs, 169 based on Foata normal form. 2/1392 useless extension candidates. Maximal degree in co-relation 9418. Up to 1206 conditions per place. [2023-09-01 14:05:05,256 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 201 selfloop transitions, 56 changer transitions 14/271 dead transitions. [2023-09-01 14:05:05,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 271 transitions, 4013 flow [2023-09-01 14:05:05,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 14:05:05,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 14:05:05,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1702 transitions. [2023-09-01 14:05:05,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34891348913489134 [2023-09-01 14:05:05,260 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1702 transitions. [2023-09-01 14:05:05,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1702 transitions. [2023-09-01 14:05:05,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:05:05,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1702 transitions. [2023-09-01 14:05:05,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 94.55555555555556) internal successors, (1702), 18 states have internal predecessors, (1702), 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) [2023-09-01 14:05:05,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 271.0) internal successors, (5149), 19 states have internal predecessors, (5149), 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) [2023-09-01 14:05:05,268 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 271.0) internal successors, (5149), 19 states have internal predecessors, (5149), 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) [2023-09-01 14:05:05,268 INFO L175 Difference]: Start difference. First operand has 154 places, 234 transitions, 3280 flow. Second operand 18 states and 1702 transitions. [2023-09-01 14:05:05,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 271 transitions, 4013 flow [2023-09-01 14:05:05,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 271 transitions, 3910 flow, removed 21 selfloop flow, removed 11 redundant places. [2023-09-01 14:05:05,334 INFO L231 Difference]: Finished difference. Result has 165 places, 236 transitions, 3332 flow [2023-09-01 14:05:05,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=3177, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3332, PETRI_PLACES=165, PETRI_TRANSITIONS=236} [2023-09-01 14:05:05,335 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 144 predicate places. [2023-09-01 14:05:05,335 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 236 transitions, 3332 flow [2023-09-01 14:05:05,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 91.96296296296296) internal successors, (2483), 27 states have internal predecessors, (2483), 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) [2023-09-01 14:05:05,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:05:05,336 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:05:05,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 14:05:05,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-09-01 14:05:05,543 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:05:05,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:05:05,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1820848081, now seen corresponding path program 4 times [2023-09-01 14:05:05,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:05:05,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517629911] [2023-09-01 14:05:05,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:05:05,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:05:05,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:05:06,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:05:06,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:05:06,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517629911] [2023-09-01 14:05:06,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517629911] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:05:06,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152231959] [2023-09-01 14:05:06,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:05:06,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:05:06,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:05:06,513 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:05:06,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 14:05:06,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:05:06,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:05:06,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 55 conjunts are in the unsatisfiable core [2023-09-01 14:05:06,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:05:07,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:05:07,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:05:07,281 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:05:07,282 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 42 treesize of output 34 [2023-09-01 14:05:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:05:07,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152231959] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:05:07,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:05:07,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 31 [2023-09-01 14:05:07,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497969105] [2023-09-01 14:05:07,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:05:07,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 14:05:07,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:05:07,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 14:05:07,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2023-09-01 14:05:09,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 271 [2023-09-01 14:05:09,777 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 236 transitions, 3332 flow. Second operand has 33 states, 33 states have (on average 85.63636363636364) internal successors, (2826), 33 states have internal predecessors, (2826), 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) [2023-09-01 14:05:09,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:05:09,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 271 [2023-09-01 14:05:09,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:05:12,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:05:13,653 INFO L130 PetriNetUnfolder]: 853/1644 cut-off events. [2023-09-01 14:05:13,653 INFO L131 PetriNetUnfolder]: For 22584/22584 co-relation queries the response was YES. [2023-09-01 14:05:13,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11840 conditions, 1644 events. 853/1644 cut-off events. For 22584/22584 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 9730 event pairs, 114 based on Foata normal form. 7/1651 useless extension candidates. Maximal degree in co-relation 11779. Up to 1253 conditions per place. [2023-09-01 14:05:13,669 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 242 selfloop transitions, 95 changer transitions 15/352 dead transitions. [2023-09-01 14:05:13,669 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 352 transitions, 5208 flow [2023-09-01 14:05:13,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 14:05:13,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 14:05:13,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2312 transitions. [2023-09-01 14:05:13,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32812943514050524 [2023-09-01 14:05:13,672 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2312 transitions. [2023-09-01 14:05:13,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2312 transitions. [2023-09-01 14:05:13,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:05:13,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2312 transitions. [2023-09-01 14:05:13,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 88.92307692307692) internal successors, (2312), 26 states have internal predecessors, (2312), 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) [2023-09-01 14:05:13,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 271.0) internal successors, (7317), 27 states have internal predecessors, (7317), 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) [2023-09-01 14:05:13,683 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 271.0) internal successors, (7317), 27 states have internal predecessors, (7317), 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) [2023-09-01 14:05:13,684 INFO L175 Difference]: Start difference. First operand has 165 places, 236 transitions, 3332 flow. Second operand 26 states and 2312 transitions. [2023-09-01 14:05:13,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 352 transitions, 5208 flow [2023-09-01 14:05:13,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 352 transitions, 5066 flow, removed 6 selfloop flow, removed 15 redundant places. [2023-09-01 14:05:13,765 INFO L231 Difference]: Finished difference. Result has 185 places, 286 transitions, 4391 flow [2023-09-01 14:05:13,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=3218, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4391, PETRI_PLACES=185, PETRI_TRANSITIONS=286} [2023-09-01 14:05:13,765 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 164 predicate places. [2023-09-01 14:05:13,765 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 286 transitions, 4391 flow [2023-09-01 14:05:13,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 85.63636363636364) internal successors, (2826), 33 states have internal predecessors, (2826), 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) [2023-09-01 14:05:13,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:05:13,766 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:05:13,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 14:05:13,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 14:05:13,972 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:05:13,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:05:13,973 INFO L85 PathProgramCache]: Analyzing trace with hash -2088997291, now seen corresponding path program 5 times [2023-09-01 14:05:13,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:05:13,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659644411] [2023-09-01 14:05:13,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:05:13,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:05:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:05:14,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:05:14,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:05:14,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659644411] [2023-09-01 14:05:14,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659644411] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:05:14,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383706345] [2023-09-01 14:05:14,742 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:05:14,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:05:14,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:05:14,744 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:05:14,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 14:05:14,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:05:14,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:05:14,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 45 conjunts are in the unsatisfiable core [2023-09-01 14:05:14,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:05:15,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:05:15,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:05:15,246 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:05:15,247 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 53 treesize of output 37 [2023-09-01 14:05:15,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:05:15,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383706345] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:05:15,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:05:15,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 26 [2023-09-01 14:05:15,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538192984] [2023-09-01 14:05:15,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:05:15,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 14:05:15,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:05:15,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 14:05:15,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2023-09-01 14:05:16,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 271 [2023-09-01 14:05:16,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 286 transitions, 4391 flow. Second operand has 28 states, 28 states have (on average 90.85714285714286) internal successors, (2544), 28 states have internal predecessors, (2544), 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) [2023-09-01 14:05:16,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:05:16,843 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 271 [2023-09-01 14:05:16,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:05:18,747 INFO L130 PetriNetUnfolder]: 842/1620 cut-off events. [2023-09-01 14:05:18,748 INFO L131 PetriNetUnfolder]: For 21513/21513 co-relation queries the response was YES. [2023-09-01 14:05:18,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12057 conditions, 1620 events. 842/1620 cut-off events. For 21513/21513 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 9571 event pairs, 122 based on Foata normal form. 2/1622 useless extension candidates. Maximal degree in co-relation 11986. Up to 927 conditions per place. [2023-09-01 14:05:18,758 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 215 selfloop transitions, 100 changer transitions 15/330 dead transitions. [2023-09-01 14:05:18,759 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 330 transitions, 5409 flow [2023-09-01 14:05:18,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 14:05:18,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 14:05:18,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1858 transitions. [2023-09-01 14:05:18,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34280442804428046 [2023-09-01 14:05:18,762 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1858 transitions. [2023-09-01 14:05:18,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1858 transitions. [2023-09-01 14:05:18,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:05:18,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1858 transitions. [2023-09-01 14:05:18,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 92.9) internal successors, (1858), 20 states have internal predecessors, (1858), 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) [2023-09-01 14:05:18,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 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) [2023-09-01 14:05:18,769 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 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) [2023-09-01 14:05:18,769 INFO L175 Difference]: Start difference. First operand has 185 places, 286 transitions, 4391 flow. Second operand 20 states and 1858 transitions. [2023-09-01 14:05:18,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 330 transitions, 5409 flow [2023-09-01 14:05:18,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 330 transitions, 5217 flow, removed 73 selfloop flow, removed 11 redundant places. [2023-09-01 14:05:18,857 INFO L231 Difference]: Finished difference. Result has 195 places, 288 transitions, 4446 flow [2023-09-01 14:05:18,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=4199, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4446, PETRI_PLACES=195, PETRI_TRANSITIONS=288} [2023-09-01 14:05:18,858 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 174 predicate places. [2023-09-01 14:05:18,858 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 288 transitions, 4446 flow [2023-09-01 14:05:18,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 90.85714285714286) internal successors, (2544), 28 states have internal predecessors, (2544), 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) [2023-09-01 14:05:18,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:05:18,858 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:05:18,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 14:05:19,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 14:05:19,059 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:05:19,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:05:19,059 INFO L85 PathProgramCache]: Analyzing trace with hash -348873531, now seen corresponding path program 6 times [2023-09-01 14:05:19,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:05:19,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829820854] [2023-09-01 14:05:19,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:05:19,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:05:19,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:05:20,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:05:20,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:05:20,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829820854] [2023-09-01 14:05:20,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829820854] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:05:20,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945133990] [2023-09-01 14:05:20,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:05:20,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:05:20,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:05:20,169 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:05:20,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 14:05:20,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 14:05:20,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:05:20,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 59 conjunts are in the unsatisfiable core [2023-09-01 14:05:20,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:05:20,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:05:20,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 14:05:21,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:05:21,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:05:21,304 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:05:21,305 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 59 treesize of output 51 [2023-09-01 14:05:21,308 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 38 treesize of output 32 [2023-09-01 14:05:21,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:05:21,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945133990] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:05:21,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:05:21,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 30 [2023-09-01 14:05:21,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728948441] [2023-09-01 14:05:21,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:05:21,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 14:05:21,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:05:21,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 14:05:21,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=902, Unknown=2, NotChecked=0, Total=992 [2023-09-01 14:05:23,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:05:25,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:05:27,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:05:29,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:05:31,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:05:34,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:05:36,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:05:36,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 271 [2023-09-01 14:05:36,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 288 transitions, 4446 flow. Second operand has 32 states, 32 states have (on average 69.65625) internal successors, (2229), 32 states have internal predecessors, (2229), 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) [2023-09-01 14:05:36,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:05:36,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 271 [2023-09-01 14:05:36,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:05:39,148 INFO L130 PetriNetUnfolder]: 855/1645 cut-off events. [2023-09-01 14:05:39,148 INFO L131 PetriNetUnfolder]: For 26143/26143 co-relation queries the response was YES. [2023-09-01 14:05:39,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12289 conditions, 1645 events. 855/1645 cut-off events. For 26143/26143 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 9772 event pairs, 102 based on Foata normal form. 2/1647 useless extension candidates. Maximal degree in co-relation 12215. Up to 887 conditions per place. [2023-09-01 14:05:39,161 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 202 selfloop transitions, 139 changer transitions 7/348 dead transitions. [2023-09-01 14:05:39,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 348 transitions, 5735 flow [2023-09-01 14:05:39,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 14:05:39,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 14:05:39,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1452 transitions. [2023-09-01 14:05:39,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26789667896678965 [2023-09-01 14:05:39,165 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1452 transitions. [2023-09-01 14:05:39,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1452 transitions. [2023-09-01 14:05:39,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:05:39,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1452 transitions. [2023-09-01 14:05:39,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 72.6) internal successors, (1452), 20 states have internal predecessors, (1452), 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) [2023-09-01 14:05:39,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 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) [2023-09-01 14:05:39,171 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 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) [2023-09-01 14:05:39,171 INFO L175 Difference]: Start difference. First operand has 195 places, 288 transitions, 4446 flow. Second operand 20 states and 1452 transitions. [2023-09-01 14:05:39,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 348 transitions, 5735 flow [2023-09-01 14:05:39,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 348 transitions, 5673 flow, removed 11 selfloop flow, removed 13 redundant places. [2023-09-01 14:05:39,311 INFO L231 Difference]: Finished difference. Result has 205 places, 302 transitions, 4984 flow [2023-09-01 14:05:39,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=4388, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4984, PETRI_PLACES=205, PETRI_TRANSITIONS=302} [2023-09-01 14:05:39,312 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 184 predicate places. [2023-09-01 14:05:39,312 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 302 transitions, 4984 flow [2023-09-01 14:05:39,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 69.65625) internal successors, (2229), 32 states have internal predecessors, (2229), 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) [2023-09-01 14:05:39,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:05:39,313 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:05:39,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 14:05:39,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-09-01 14:05:39,513 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:05:39,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:05:39,514 INFO L85 PathProgramCache]: Analyzing trace with hash 2032706171, now seen corresponding path program 7 times [2023-09-01 14:05:39,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:05:39,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264182314] [2023-09-01 14:05:39,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:05:39,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:05:39,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:05:40,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:05:40,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:05:40,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264182314] [2023-09-01 14:05:40,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264182314] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:05:40,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475841330] [2023-09-01 14:05:40,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:05:40,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:05:40,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:05:40,385 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:05:40,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 14:05:40,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:05:40,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 67 conjunts are in the unsatisfiable core [2023-09-01 14:05:40,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:05:40,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:05:40,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 14:05:40,965 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:05:40,967 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:05:40,967 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 17 treesize of output 10 [2023-09-01 14:05:41,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:05:41,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:05:41,340 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:05:41,340 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 59 treesize of output 51 [2023-09-01 14:05:41,349 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 38 treesize of output 32 [2023-09-01 14:05:41,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:05:41,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475841330] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:05:41,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:05:41,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-09-01 14:05:41,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060080166] [2023-09-01 14:05:41,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:05:41,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 14:05:41,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:05:41,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 14:05:41,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=919, Unknown=7, NotChecked=0, Total=1056 [2023-09-01 14:05:44,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:05:45,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 271 [2023-09-01 14:05:45,377 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 302 transitions, 4984 flow. Second operand has 33 states, 33 states have (on average 72.57575757575758) internal successors, (2395), 33 states have internal predecessors, (2395), 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) [2023-09-01 14:05:45,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:05:45,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 271 [2023-09-01 14:05:45,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:06:01,047 WARN L222 SmtUtils]: Spent 10.24s on a formula simplification. DAG size of input: 41 DAG size of output: 40 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:06:05,356 INFO L130 PetriNetUnfolder]: 1005/1978 cut-off events. [2023-09-01 14:06:05,356 INFO L131 PetriNetUnfolder]: For 38067/38067 co-relation queries the response was YES. [2023-09-01 14:06:05,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15509 conditions, 1978 events. 1005/1978 cut-off events. For 38067/38067 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 12752 event pairs, 57 based on Foata normal form. 4/1982 useless extension candidates. Maximal degree in co-relation 15430. Up to 622 conditions per place. [2023-09-01 14:06:05,373 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 211 selfloop transitions, 219 changer transitions 16/446 dead transitions. [2023-09-01 14:06:05,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 446 transitions, 7297 flow [2023-09-01 14:06:05,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-09-01 14:06:05,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-09-01 14:06:05,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2296 transitions. [2023-09-01 14:06:05,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2824108241082411 [2023-09-01 14:06:05,377 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2296 transitions. [2023-09-01 14:06:05,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2296 transitions. [2023-09-01 14:06:05,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:06:05,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2296 transitions. [2023-09-01 14:06:05,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 76.53333333333333) internal successors, (2296), 30 states have internal predecessors, (2296), 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) [2023-09-01 14:06:05,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 271.0) internal successors, (8401), 31 states have internal predecessors, (8401), 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) [2023-09-01 14:06:05,387 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 271.0) internal successors, (8401), 31 states have internal predecessors, (8401), 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) [2023-09-01 14:06:05,387 INFO L175 Difference]: Start difference. First operand has 205 places, 302 transitions, 4984 flow. Second operand 30 states and 2296 transitions. [2023-09-01 14:06:05,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 446 transitions, 7297 flow [2023-09-01 14:06:05,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 446 transitions, 7040 flow, removed 56 selfloop flow, removed 11 redundant places. [2023-09-01 14:06:05,582 INFO L231 Difference]: Finished difference. Result has 235 places, 344 transitions, 6076 flow [2023-09-01 14:06:05,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=4770, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=6076, PETRI_PLACES=235, PETRI_TRANSITIONS=344} [2023-09-01 14:06:05,583 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 214 predicate places. [2023-09-01 14:06:05,583 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 344 transitions, 6076 flow [2023-09-01 14:06:05,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 72.57575757575758) internal successors, (2395), 33 states have internal predecessors, (2395), 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) [2023-09-01 14:06:05,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:06:05,584 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:06:05,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 14:06:05,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-09-01 14:06:05,790 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:06:05,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:06:05,791 INFO L85 PathProgramCache]: Analyzing trace with hash 151395413, now seen corresponding path program 8 times [2023-09-01 14:06:05,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:06:05,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405395790] [2023-09-01 14:06:05,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:06:05,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:06:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:06:06,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:06:06,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:06:06,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405395790] [2023-09-01 14:06:06,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405395790] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:06:06,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532347924] [2023-09-01 14:06:06,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:06:06,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:06:06,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:06:06,565 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:06:06,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 14:06:06,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:06:06,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:06:06,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 70 conjunts are in the unsatisfiable core [2023-09-01 14:06:06,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:06:06,788 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 15 treesize of output 11 [2023-09-01 14:06:06,838 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 15 treesize of output 11 [2023-09-01 14:06:06,888 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 6 treesize of output 5 [2023-09-01 14:06:07,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:06:07,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 14:06:07,199 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 11 treesize of output 3 [2023-09-01 14:06:07,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:06:07,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:06:08,499 INFO L321 Elim1Store]: treesize reduction 48, result has 64.7 percent of original size [2023-09-01 14:06:08,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 201 treesize of output 221 [2023-09-01 14:06:08,523 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 339 treesize of output 324 [2023-09-01 14:06:08,557 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:06:08,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 248 treesize of output 254 [2023-09-01 14:06:08,578 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:06:08,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 220 treesize of output 217 [2023-09-01 14:06:08,589 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 208 treesize of output 196 [2023-09-01 14:06:08,601 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 196 treesize of output 184 [2023-09-01 14:06:08,621 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:06:08,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 184 treesize of output 181 [2023-09-01 14:06:08,649 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:06:08,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 188 treesize of output 194 [2023-09-01 14:06:08,675 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:06:08,676 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 195 treesize of output 187 [2023-09-01 14:06:08,691 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 169 treesize of output 163 [2023-09-01 14:06:10,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:06:10,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532347924] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:06:10,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:06:10,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 32 [2023-09-01 14:06:10,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270262340] [2023-09-01 14:06:10,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:06:10,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-09-01 14:06:10,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:06:10,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-09-01 14:06:10,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=977, Unknown=8, NotChecked=0, Total=1122 [2023-09-01 14:06:12,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:06:13,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 271 [2023-09-01 14:06:13,010 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 344 transitions, 6076 flow. Second operand has 34 states, 34 states have (on average 69.47058823529412) internal successors, (2362), 34 states have internal predecessors, (2362), 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) [2023-09-01 14:06:13,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:06:13,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 271 [2023-09-01 14:06:13,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:06:28,457 WARN L222 SmtUtils]: Spent 14.19s on a formula simplification. DAG size of input: 45 DAG size of output: 44 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:06:35,155 INFO L130 PetriNetUnfolder]: 1088/2139 cut-off events. [2023-09-01 14:06:35,156 INFO L131 PetriNetUnfolder]: For 53045/53045 co-relation queries the response was YES. [2023-09-01 14:06:35,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18420 conditions, 2139 events. 1088/2139 cut-off events. For 53045/53045 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 13993 event pairs, 79 based on Foata normal form. 29/2168 useless extension candidates. Maximal degree in co-relation 18329. Up to 893 conditions per place. [2023-09-01 14:06:35,175 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 210 selfloop transitions, 257 changer transitions 33/500 dead transitions. [2023-09-01 14:06:35,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 500 transitions, 8844 flow [2023-09-01 14:06:35,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-09-01 14:06:35,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-09-01 14:06:35,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2927 transitions. [2023-09-01 14:06:35,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2700184501845018 [2023-09-01 14:06:35,180 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2927 transitions. [2023-09-01 14:06:35,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2927 transitions. [2023-09-01 14:06:35,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:06:35,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2927 transitions. [2023-09-01 14:06:35,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 73.175) internal successors, (2927), 40 states have internal predecessors, (2927), 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) [2023-09-01 14:06:35,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 271.0) internal successors, (11111), 41 states have internal predecessors, (11111), 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) [2023-09-01 14:06:35,192 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 271.0) internal successors, (11111), 41 states have internal predecessors, (11111), 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) [2023-09-01 14:06:35,192 INFO L175 Difference]: Start difference. First operand has 235 places, 344 transitions, 6076 flow. Second operand 40 states and 2927 transitions. [2023-09-01 14:06:35,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 500 transitions, 8844 flow [2023-09-01 14:06:35,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 500 transitions, 8504 flow, removed 119 selfloop flow, removed 18 redundant places. [2023-09-01 14:06:35,445 INFO L231 Difference]: Finished difference. Result has 266 places, 390 transitions, 7617 flow [2023-09-01 14:06:35,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=5380, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=7617, PETRI_PLACES=266, PETRI_TRANSITIONS=390} [2023-09-01 14:06:35,445 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 245 predicate places. [2023-09-01 14:06:35,445 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 390 transitions, 7617 flow [2023-09-01 14:06:35,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 69.47058823529412) internal successors, (2362), 34 states have internal predecessors, (2362), 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) [2023-09-01 14:06:35,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:06:35,446 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:06:35,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 14:06:35,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:06:35,646 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:06:35,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:06:35,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1739213093, now seen corresponding path program 9 times [2023-09-01 14:06:35,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:06:35,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786002211] [2023-09-01 14:06:35,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:06:35,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:06:35,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:06:36,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:06:36,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:06:36,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786002211] [2023-09-01 14:06:36,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786002211] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:06:36,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567797293] [2023-09-01 14:06:36,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:06:36,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:06:36,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:06:36,533 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:06:36,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 14:06:36,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 14:06:36,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:06:36,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 69 conjunts are in the unsatisfiable core [2023-09-01 14:06:36,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:06:37,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:06:37,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 14:06:37,565 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 11 treesize of output 3 [2023-09-01 14:06:37,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:06:37,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:06:38,074 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:06:38,074 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 59 treesize of output 51 [2023-09-01 14:06:38,080 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 38 treesize of output 32 [2023-09-01 14:06:38,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:06:38,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567797293] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:06:38,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:06:38,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-09-01 14:06:38,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970056031] [2023-09-01 14:06:38,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:06:38,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-09-01 14:06:38,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:06:38,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-09-01 14:06:38,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=997, Unknown=3, NotChecked=0, Total=1190 [2023-09-01 14:06:39,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 271 [2023-09-01 14:06:39,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 390 transitions, 7617 flow. Second operand has 35 states, 35 states have (on average 79.54285714285714) internal successors, (2784), 35 states have internal predecessors, (2784), 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) [2023-09-01 14:06:39,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:06:39,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 271 [2023-09-01 14:06:39,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:06:44,373 INFO L130 PetriNetUnfolder]: 1112/2200 cut-off events. [2023-09-01 14:06:44,373 INFO L131 PetriNetUnfolder]: For 58596/58596 co-relation queries the response was YES. [2023-09-01 14:06:44,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19782 conditions, 2200 events. 1112/2200 cut-off events. For 58596/58596 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 14466 event pairs, 152 based on Foata normal form. 7/2207 useless extension candidates. Maximal degree in co-relation 19679. Up to 1378 conditions per place. [2023-09-01 14:06:44,392 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 272 selfloop transitions, 184 changer transitions 42/498 dead transitions. [2023-09-01 14:06:44,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 498 transitions, 9510 flow [2023-09-01 14:06:44,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-09-01 14:06:44,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-09-01 14:06:44,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2745 transitions. [2023-09-01 14:06:44,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3069439785306944 [2023-09-01 14:06:44,397 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2745 transitions. [2023-09-01 14:06:44,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2745 transitions. [2023-09-01 14:06:44,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:06:44,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2745 transitions. [2023-09-01 14:06:44,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 83.18181818181819) internal successors, (2745), 33 states have internal predecessors, (2745), 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) [2023-09-01 14:06:44,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 271.0) internal successors, (9214), 34 states have internal predecessors, (9214), 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) [2023-09-01 14:06:44,407 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 271.0) internal successors, (9214), 34 states have internal predecessors, (9214), 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) [2023-09-01 14:06:44,408 INFO L175 Difference]: Start difference. First operand has 266 places, 390 transitions, 7617 flow. Second operand 33 states and 2745 transitions. [2023-09-01 14:06:44,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 498 transitions, 9510 flow [2023-09-01 14:06:44,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 498 transitions, 8650 flow, removed 395 selfloop flow, removed 18 redundant places. [2023-09-01 14:06:44,758 INFO L231 Difference]: Finished difference. Result has 289 places, 397 transitions, 7587 flow [2023-09-01 14:06:44,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=6977, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=7587, PETRI_PLACES=289, PETRI_TRANSITIONS=397} [2023-09-01 14:06:44,759 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 268 predicate places. [2023-09-01 14:06:44,759 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 397 transitions, 7587 flow [2023-09-01 14:06:44,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 79.54285714285714) internal successors, (2784), 35 states have internal predecessors, (2784), 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) [2023-09-01 14:06:44,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:06:44,760 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:06:44,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-09-01 14:06:44,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:06:44,961 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:06:44,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:06:44,961 INFO L85 PathProgramCache]: Analyzing trace with hash -890919087, now seen corresponding path program 10 times [2023-09-01 14:06:44,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:06:44,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946640290] [2023-09-01 14:06:44,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:06:44,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:06:44,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:06:45,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:06:45,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:06:45,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946640290] [2023-09-01 14:06:45,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946640290] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:06:45,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668983000] [2023-09-01 14:06:45,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:06:45,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:06:45,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:06:45,666 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:06:45,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 14:06:45,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:06:45,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:06:45,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 73 conjunts are in the unsatisfiable core [2023-09-01 14:06:45,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:06:45,814 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 16 treesize of output 12 [2023-09-01 14:06:45,851 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 15 treesize of output 11 [2023-09-01 14:06:45,900 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 6 treesize of output 5 [2023-09-01 14:06:45,943 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 6 treesize of output 5 [2023-09-01 14:06:46,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:06:46,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:06:46,710 WARN L839 $PredicateComparison]: unable to prove that (or (< c_~n~0 (+ 2 c_~q_back~0)) (<= c_~N~0 0) (< c_~q_back~0 0) (< 1 c_~N~0) (let ((.cse1 (+ c_~q~0.offset (* 4 c_~q_back~0)))) (and (or (forall ((~C~0 Int)) (let ((.cse0 (* 2 ~C~0))) (= (mod (+ c_~x~0 .cse0) 4294967296) (mod (+ c_~y~0 .cse0) 4294967296)))) (forall ((v_ArrVal_619 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_619) c_~q~0.base) .cse1) 1)))) (forall ((v_ArrVal_619 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_619) c_~q~0.base))) (or (= c_~N~0 (select .cse2 (+ (* c_~q_front~0 4) c_~q~0.offset))) (not (= (select .cse2 .cse1) 1)))))))) is different from false [2023-09-01 14:06:47,087 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:06:47,088 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 61 [2023-09-01 14:06:47,099 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 14:06:47,099 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 300 treesize of output 271 [2023-09-01 14:06:47,110 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:06:47,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 80 [2023-09-01 14:06:47,124 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 14:06:47,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 91 treesize of output 67 [2023-09-01 14:06:47,143 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:06:47,143 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 44 [2023-09-01 14:06:47,147 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 154 treesize of output 138 [2023-09-01 14:06:47,153 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 10 treesize of output 4 [2023-09-01 14:06:47,158 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 10 treesize of output 4 [2023-09-01 14:06:47,165 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 10 treesize of output 4 [2023-09-01 14:06:47,174 INFO L321 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2023-09-01 14:06:47,174 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 1 [2023-09-01 14:06:47,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:06:47,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668983000] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:06:47,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:06:47,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 32 [2023-09-01 14:06:47,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735815296] [2023-09-01 14:06:47,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:06:47,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-09-01 14:06:47,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:06:47,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-09-01 14:06:47,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=910, Unknown=2, NotChecked=62, Total=1122 [2023-09-01 14:06:47,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 271 [2023-09-01 14:06:47,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 397 transitions, 7587 flow. Second operand has 34 states, 34 states have (on average 69.58823529411765) internal successors, (2366), 34 states have internal predecessors, (2366), 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) [2023-09-01 14:06:47,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:06:47,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 271 [2023-09-01 14:06:47,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:06:50,988 INFO L130 PetriNetUnfolder]: 1147/2254 cut-off events. [2023-09-01 14:06:50,988 INFO L131 PetriNetUnfolder]: For 39997/39997 co-relation queries the response was YES. [2023-09-01 14:06:51,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19365 conditions, 2254 events. 1147/2254 cut-off events. For 39997/39997 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 14849 event pairs, 85 based on Foata normal form. 2/2254 useless extension candidates. Maximal degree in co-relation 19255. Up to 1482 conditions per place. [2023-09-01 14:06:51,008 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 276 selfloop transitions, 213 changer transitions 11/500 dead transitions. [2023-09-01 14:06:51,008 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 500 transitions, 9913 flow [2023-09-01 14:06:51,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-09-01 14:06:51,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-09-01 14:06:51,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2180 transitions. [2023-09-01 14:06:51,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26814268142681424 [2023-09-01 14:06:51,011 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2180 transitions. [2023-09-01 14:06:51,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2180 transitions. [2023-09-01 14:06:51,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:06:51,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2180 transitions. [2023-09-01 14:06:51,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 72.66666666666667) internal successors, (2180), 30 states have internal predecessors, (2180), 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) [2023-09-01 14:06:51,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 271.0) internal successors, (8401), 31 states have internal predecessors, (8401), 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) [2023-09-01 14:06:51,020 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 271.0) internal successors, (8401), 31 states have internal predecessors, (8401), 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) [2023-09-01 14:06:51,020 INFO L175 Difference]: Start difference. First operand has 289 places, 397 transitions, 7587 flow. Second operand 30 states and 2180 transitions. [2023-09-01 14:06:51,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 500 transitions, 9913 flow [2023-09-01 14:06:51,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 500 transitions, 9360 flow, removed 92 selfloop flow, removed 27 redundant places. [2023-09-01 14:06:51,257 INFO L231 Difference]: Finished difference. Result has 292 places, 439 transitions, 8722 flow [2023-09-01 14:06:51,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=7133, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=8722, PETRI_PLACES=292, PETRI_TRANSITIONS=439} [2023-09-01 14:06:51,258 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 271 predicate places. [2023-09-01 14:06:51,258 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 439 transitions, 8722 flow [2023-09-01 14:06:51,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 69.58823529411765) internal successors, (2366), 34 states have internal predecessors, (2366), 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) [2023-09-01 14:06:51,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:06:51,258 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:06:51,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-09-01 14:06:51,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:06:51,459 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:06:51,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:06:51,459 INFO L85 PathProgramCache]: Analyzing trace with hash -451798573, now seen corresponding path program 11 times [2023-09-01 14:06:51,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:06:51,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690370763] [2023-09-01 14:06:51,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:06:51,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:06:51,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:06:52,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:06:52,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:06:52,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690370763] [2023-09-01 14:06:52,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690370763] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:06:52,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516404936] [2023-09-01 14:06:52,108 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:06:52,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:06:52,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:06:52,109 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:06:52,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 14:06:52,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:06:52,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:06:52,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 45 conjunts are in the unsatisfiable core [2023-09-01 14:06:52,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:06:52,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:06:52,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:06:52,994 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:06:52,994 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 53 treesize of output 37 [2023-09-01 14:06:53,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:06:53,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516404936] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:06:53,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:06:53,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 26 [2023-09-01 14:06:53,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442160325] [2023-09-01 14:06:53,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:06:53,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 14:06:53,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:06:53,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 14:06:53,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2023-09-01 14:06:54,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 271 [2023-09-01 14:06:54,574 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 439 transitions, 8722 flow. Second operand has 28 states, 28 states have (on average 91.85714285714286) internal successors, (2572), 28 states have internal predecessors, (2572), 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) [2023-09-01 14:06:54,574 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:06:54,574 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 271 [2023-09-01 14:06:54,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:06:56,076 INFO L130 PetriNetUnfolder]: 1145/2244 cut-off events. [2023-09-01 14:06:56,076 INFO L131 PetriNetUnfolder]: For 42686/42686 co-relation queries the response was YES. [2023-09-01 14:06:56,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19513 conditions, 2244 events. 1145/2244 cut-off events. For 42686/42686 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 14769 event pairs, 148 based on Foata normal form. 2/2244 useless extension candidates. Maximal degree in co-relation 19402. Up to 1033 conditions per place. [2023-09-01 14:06:56,093 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 319 selfloop transitions, 152 changer transitions 14/485 dead transitions. [2023-09-01 14:06:56,093 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 485 transitions, 10033 flow [2023-09-01 14:06:56,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 14:06:56,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 14:06:56,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2164 transitions. [2023-09-01 14:06:56,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34718434140863147 [2023-09-01 14:06:56,096 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2164 transitions. [2023-09-01 14:06:56,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2164 transitions. [2023-09-01 14:06:56,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:06:56,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2164 transitions. [2023-09-01 14:06:56,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 94.08695652173913) internal successors, (2164), 23 states have internal predecessors, (2164), 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) [2023-09-01 14:06:56,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 271.0) internal successors, (6504), 24 states have internal predecessors, (6504), 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) [2023-09-01 14:06:56,103 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 271.0) internal successors, (6504), 24 states have internal predecessors, (6504), 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) [2023-09-01 14:06:56,103 INFO L175 Difference]: Start difference. First operand has 292 places, 439 transitions, 8722 flow. Second operand 23 states and 2164 transitions. [2023-09-01 14:06:56,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 485 transitions, 10033 flow [2023-09-01 14:06:56,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 485 transitions, 9879 flow, removed 52 selfloop flow, removed 16 redundant places. [2023-09-01 14:06:56,349 INFO L231 Difference]: Finished difference. Result has 298 places, 438 transitions, 8934 flow [2023-09-01 14:06:56,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=8572, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=8934, PETRI_PLACES=298, PETRI_TRANSITIONS=438} [2023-09-01 14:06:56,350 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 277 predicate places. [2023-09-01 14:06:56,350 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 438 transitions, 8934 flow [2023-09-01 14:06:56,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 91.85714285714286) internal successors, (2572), 28 states have internal predecessors, (2572), 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) [2023-09-01 14:06:56,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:06:56,351 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:06:56,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-09-01 14:06:56,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-09-01 14:06:56,551 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:06:56,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:06:56,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1660800894, now seen corresponding path program 12 times [2023-09-01 14:06:56,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:06:56,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82161214] [2023-09-01 14:06:56,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:06:56,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:06:56,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:06:56,654 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:06:56,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:06:56,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82161214] [2023-09-01 14:06:56,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82161214] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:06:56,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786250692] [2023-09-01 14:06:56,655 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:06:56,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:06:56,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:06:56,657 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:06:56,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 14:06:56,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 14:06:56,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:06:56,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 14:06:56,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:06:56,880 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:06:56,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:06:56,963 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:06:56,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786250692] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:06:56,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:06:56,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-09-01 14:06:56,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047666300] [2023-09-01 14:06:56,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:06:56,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 14:06:56,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:06:56,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 14:06:56,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-09-01 14:06:57,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 271 [2023-09-01 14:06:57,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 438 transitions, 8934 flow. Second operand has 18 states, 18 states have (on average 114.11111111111111) internal successors, (2054), 18 states have internal predecessors, (2054), 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) [2023-09-01 14:06:57,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:06:57,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 271 [2023-09-01 14:06:57,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:06:57,469 INFO L130 PetriNetUnfolder]: 622/1286 cut-off events. [2023-09-01 14:06:57,469 INFO L131 PetriNetUnfolder]: For 30375/30384 co-relation queries the response was YES. [2023-09-01 14:06:57,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11547 conditions, 1286 events. 622/1286 cut-off events. For 30375/30384 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 7821 event pairs, 230 based on Foata normal form. 100/1385 useless extension candidates. Maximal degree in co-relation 11441. Up to 951 conditions per place. [2023-09-01 14:06:57,482 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 225 selfloop transitions, 12 changer transitions 35/282 dead transitions. [2023-09-01 14:06:57,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 282 transitions, 6244 flow [2023-09-01 14:06:57,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 14:06:57,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 14:06:57,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 941 transitions. [2023-09-01 14:06:57,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43404059040590404 [2023-09-01 14:06:57,490 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 941 transitions. [2023-09-01 14:06:57,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 941 transitions. [2023-09-01 14:06:57,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:06:57,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 941 transitions. [2023-09-01 14:06:57,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 117.625) internal successors, (941), 8 states have internal predecessors, (941), 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) [2023-09-01 14:06:57,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 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) [2023-09-01 14:06:57,493 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 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) [2023-09-01 14:06:57,493 INFO L175 Difference]: Start difference. First operand has 298 places, 438 transitions, 8934 flow. Second operand 8 states and 941 transitions. [2023-09-01 14:06:57,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 282 transitions, 6244 flow [2023-09-01 14:06:57,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 282 transitions, 5530 flow, removed 82 selfloop flow, removed 44 redundant places. [2023-09-01 14:06:57,666 INFO L231 Difference]: Finished difference. Result has 239 places, 238 transitions, 4373 flow [2023-09-01 14:06:57,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=4942, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4373, PETRI_PLACES=239, PETRI_TRANSITIONS=238} [2023-09-01 14:06:57,668 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 218 predicate places. [2023-09-01 14:06:57,668 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 238 transitions, 4373 flow [2023-09-01 14:06:57,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 114.11111111111111) internal successors, (2054), 18 states have internal predecessors, (2054), 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) [2023-09-01 14:06:57,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:06:57,669 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:06:57,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-09-01 14:06:57,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:06:57,875 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:06:57,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:06:57,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1692186566, now seen corresponding path program 13 times [2023-09-01 14:06:57,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:06:57,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767688850] [2023-09-01 14:06:57,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:06:57,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:06:57,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:06:58,404 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:06:58,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:06:58,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767688850] [2023-09-01 14:06:58,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767688850] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:06:58,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301287012] [2023-09-01 14:06:58,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:06:58,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:06:58,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:06:58,406 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:06:58,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 14:06:58,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:06:58,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 39 conjunts are in the unsatisfiable core [2023-09-01 14:06:58,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:06:58,806 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:06:58,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:06:58,891 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-09-01 14:06:58,891 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 26 treesize of output 14 [2023-09-01 14:06:59,174 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:06:59,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301287012] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:06:59,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:06:59,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 30 [2023-09-01 14:06:59,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213519789] [2023-09-01 14:06:59,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:06:59,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 14:06:59,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:06:59,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 14:06:59,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2023-09-01 14:06:59,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 271 [2023-09-01 14:06:59,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 238 transitions, 4373 flow. Second operand has 31 states, 31 states have (on average 100.80645161290323) internal successors, (3125), 31 states have internal predecessors, (3125), 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) [2023-09-01 14:06:59,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:06:59,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 271 [2023-09-01 14:06:59,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:07:02,982 INFO L130 PetriNetUnfolder]: 1066/2087 cut-off events. [2023-09-01 14:07:02,982 INFO L131 PetriNetUnfolder]: For 49787/49787 co-relation queries the response was YES. [2023-09-01 14:07:02,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16755 conditions, 2087 events. 1066/2087 cut-off events. For 49787/49787 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 13271 event pairs, 70 based on Foata normal form. 156/2243 useless extension candidates. Maximal degree in co-relation 16672. Up to 645 conditions per place. [2023-09-01 14:07:02,998 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 282 selfloop transitions, 325 changer transitions 0/607 dead transitions. [2023-09-01 14:07:02,998 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 607 transitions, 9744 flow [2023-09-01 14:07:02,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-09-01 14:07:02,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-09-01 14:07:03,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 6729 transitions. [2023-09-01 14:07:03,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3879727859778598 [2023-09-01 14:07:03,003 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 6729 transitions. [2023-09-01 14:07:03,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 6729 transitions. [2023-09-01 14:07:03,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:07:03,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 6729 transitions. [2023-09-01 14:07:03,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 105.140625) internal successors, (6729), 64 states have internal predecessors, (6729), 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) [2023-09-01 14:07:03,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 271.0) internal successors, (17615), 65 states have internal predecessors, (17615), 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) [2023-09-01 14:07:03,025 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 271.0) internal successors, (17615), 65 states have internal predecessors, (17615), 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) [2023-09-01 14:07:03,026 INFO L175 Difference]: Start difference. First operand has 239 places, 238 transitions, 4373 flow. Second operand 64 states and 6729 transitions. [2023-09-01 14:07:03,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 607 transitions, 9744 flow [2023-09-01 14:07:03,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 607 transitions, 9514 flow, removed 65 selfloop flow, removed 15 redundant places. [2023-09-01 14:07:03,194 INFO L231 Difference]: Finished difference. Result has 306 places, 416 transitions, 8531 flow [2023-09-01 14:07:03,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=4251, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=8531, PETRI_PLACES=306, PETRI_TRANSITIONS=416} [2023-09-01 14:07:03,195 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 285 predicate places. [2023-09-01 14:07:03,195 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 416 transitions, 8531 flow [2023-09-01 14:07:03,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 100.80645161290323) internal successors, (3125), 31 states have internal predecessors, (3125), 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) [2023-09-01 14:07:03,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:07:03,196 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:07:03,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-09-01 14:07:03,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:07:03,401 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:07:03,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:07:03,402 INFO L85 PathProgramCache]: Analyzing trace with hash 305707381, now seen corresponding path program 14 times [2023-09-01 14:07:03,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:07:03,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348742652] [2023-09-01 14:07:03,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:07:03,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:07:03,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:07:03,557 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:07:03,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:07:03,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348742652] [2023-09-01 14:07:03,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348742652] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:07:03,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064311760] [2023-09-01 14:07:03,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:07:03,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:07:03,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:07:03,561 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:07:03,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 14:07:03,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:07:03,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:07:03,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 14:07:03,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:07:03,743 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:07:03,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:07:03,887 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:07:03,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064311760] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:07:03,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:07:03,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 7] total 18 [2023-09-01 14:07:03,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088334381] [2023-09-01 14:07:03,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:07:03,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 14:07:03,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:07:03,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 14:07:03,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2023-09-01 14:07:03,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 271 [2023-09-01 14:07:03,993 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 416 transitions, 8531 flow. Second operand has 19 states, 19 states have (on average 112.6842105263158) internal successors, (2141), 19 states have internal predecessors, (2141), 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) [2023-09-01 14:07:03,993 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:07:03,993 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 271 [2023-09-01 14:07:03,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:07:05,006 INFO L130 PetriNetUnfolder]: 1652/3232 cut-off events. [2023-09-01 14:07:05,007 INFO L131 PetriNetUnfolder]: For 180787/180791 co-relation queries the response was YES. [2023-09-01 14:07:05,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31572 conditions, 3232 events. 1652/3232 cut-off events. For 180787/180791 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 22502 event pairs, 205 based on Foata normal form. 60/3289 useless extension candidates. Maximal degree in co-relation 31463. Up to 1156 conditions per place. [2023-09-01 14:07:05,040 INFO L137 encePairwiseOnDemand]: 264/271 looper letters, 229 selfloop transitions, 314 changer transitions 91/644 dead transitions. [2023-09-01 14:07:05,040 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 644 transitions, 14300 flow [2023-09-01 14:07:05,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 14:07:05,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 14:07:05,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1631 transitions. [2023-09-01 14:07:05,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42988929889298894 [2023-09-01 14:07:05,047 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1631 transitions. [2023-09-01 14:07:05,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1631 transitions. [2023-09-01 14:07:05,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:07:05,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1631 transitions. [2023-09-01 14:07:05,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 116.5) internal successors, (1631), 14 states have internal predecessors, (1631), 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) [2023-09-01 14:07:05,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 271.0) internal successors, (4065), 15 states have internal predecessors, (4065), 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) [2023-09-01 14:07:05,053 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 271.0) internal successors, (4065), 15 states have internal predecessors, (4065), 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) [2023-09-01 14:07:05,053 INFO L175 Difference]: Start difference. First operand has 306 places, 416 transitions, 8531 flow. Second operand 14 states and 1631 transitions. [2023-09-01 14:07:05,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 644 transitions, 14300 flow [2023-09-01 14:07:05,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 644 transitions, 12090 flow, removed 1056 selfloop flow, removed 19 redundant places. [2023-09-01 14:07:05,791 INFO L231 Difference]: Finished difference. Result has 303 places, 519 transitions, 10343 flow [2023-09-01 14:07:05,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=7138, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10343, PETRI_PLACES=303, PETRI_TRANSITIONS=519} [2023-09-01 14:07:05,792 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 282 predicate places. [2023-09-01 14:07:05,792 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 519 transitions, 10343 flow [2023-09-01 14:07:05,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 112.6842105263158) internal successors, (2141), 19 states have internal predecessors, (2141), 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) [2023-09-01 14:07:05,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:07:05,792 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:07:05,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-09-01 14:07:05,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:07:05,998 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:07:05,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:07:05,999 INFO L85 PathProgramCache]: Analyzing trace with hash 90872472, now seen corresponding path program 15 times [2023-09-01 14:07:05,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:07:05,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684040808] [2023-09-01 14:07:05,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:07:05,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:07:06,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:07:06,512 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:07:06,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:07:06,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684040808] [2023-09-01 14:07:06,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684040808] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:07:06,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24119694] [2023-09-01 14:07:06,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:07:06,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:07:06,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:07:06,514 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:07:06,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 14:07:06,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 14:07:06,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:07:06,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 14:07:06,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:07:06,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:07:06,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-09-01 14:07:06,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:07:06,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:07:06,926 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:07:06,926 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 47 treesize of output 40 [2023-09-01 14:07:06,930 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 25 treesize of output 18 [2023-09-01 14:07:07,010 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:07:07,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24119694] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:07:07,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:07:07,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 24 [2023-09-01 14:07:07,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879008876] [2023-09-01 14:07:07,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:07:07,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 14:07:07,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:07:07,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 14:07:07,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=526, Unknown=4, NotChecked=0, Total=600 [2023-09-01 14:07:07,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 271 [2023-09-01 14:07:07,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 519 transitions, 10343 flow. Second operand has 25 states, 25 states have (on average 82.84) internal successors, (2071), 25 states have internal predecessors, (2071), 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) [2023-09-01 14:07:07,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:07:07,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 271 [2023-09-01 14:07:07,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:07:09,705 INFO L130 PetriNetUnfolder]: 1517/2958 cut-off events. [2023-09-01 14:07:09,705 INFO L131 PetriNetUnfolder]: For 217974/217974 co-relation queries the response was YES. [2023-09-01 14:07:09,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28066 conditions, 2958 events. 1517/2958 cut-off events. For 217974/217974 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 19600 event pairs, 109 based on Foata normal form. 250/3208 useless extension candidates. Maximal degree in co-relation 27960. Up to 1175 conditions per place. [2023-09-01 14:07:09,735 INFO L137 encePairwiseOnDemand]: 262/271 looper letters, 399 selfloop transitions, 281 changer transitions 30/710 dead transitions. [2023-09-01 14:07:09,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 710 transitions, 14163 flow [2023-09-01 14:07:09,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-09-01 14:07:09,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-09-01 14:07:09,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2778 transitions. [2023-09-01 14:07:09,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3203413284132841 [2023-09-01 14:07:09,739 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2778 transitions. [2023-09-01 14:07:09,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2778 transitions. [2023-09-01 14:07:09,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:07:09,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2778 transitions. [2023-09-01 14:07:09,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 86.8125) internal successors, (2778), 32 states have internal predecessors, (2778), 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) [2023-09-01 14:07:09,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 271.0) internal successors, (8943), 33 states have internal predecessors, (8943), 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) [2023-09-01 14:07:09,747 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 271.0) internal successors, (8943), 33 states have internal predecessors, (8943), 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) [2023-09-01 14:07:09,747 INFO L175 Difference]: Start difference. First operand has 303 places, 519 transitions, 10343 flow. Second operand 32 states and 2778 transitions. [2023-09-01 14:07:09,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 710 transitions, 14163 flow [2023-09-01 14:07:10,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 710 transitions, 12483 flow, removed 654 selfloop flow, removed 24 redundant places. [2023-09-01 14:07:10,696 INFO L231 Difference]: Finished difference. Result has 275 places, 555 transitions, 10622 flow [2023-09-01 14:07:10,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=8491, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=10622, PETRI_PLACES=275, PETRI_TRANSITIONS=555} [2023-09-01 14:07:10,697 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 254 predicate places. [2023-09-01 14:07:10,697 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 555 transitions, 10622 flow [2023-09-01 14:07:10,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 82.84) internal successors, (2071), 25 states have internal predecessors, (2071), 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) [2023-09-01 14:07:10,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:07:10,697 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:07:10,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-09-01 14:07:10,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-09-01 14:07:10,898 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:07:10,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:07:10,899 INFO L85 PathProgramCache]: Analyzing trace with hash 752855597, now seen corresponding path program 16 times [2023-09-01 14:07:10,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:07:10,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61272056] [2023-09-01 14:07:10,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:07:10,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:07:10,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:07:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:07:11,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:07:11,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61272056] [2023-09-01 14:07:11,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61272056] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:07:11,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103273087] [2023-09-01 14:07:11,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:07:11,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:07:11,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:07:11,880 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:07:11,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 14:07:11,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:07:11,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:07:11,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 75 conjunts are in the unsatisfiable core [2023-09-01 14:07:11,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:07:12,656 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:07:12,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:07:13,122 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:07:13,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 75 [2023-09-01 14:07:13,722 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:07:13,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103273087] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:07:13,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:07:13,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-09-01 14:07:13,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402560845] [2023-09-01 14:07:13,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:07:13,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-09-01 14:07:13,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:07:13,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-09-01 14:07:13,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1403, Unknown=0, NotChecked=0, Total=1640 [2023-09-01 14:07:16,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 271 [2023-09-01 14:07:16,757 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 555 transitions, 10622 flow. Second operand has 41 states, 41 states have (on average 90.53658536585365) internal successors, (3712), 41 states have internal predecessors, (3712), 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) [2023-09-01 14:07:16,757 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:07:16,757 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 271 [2023-09-01 14:07:16,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:07:21,823 INFO L130 PetriNetUnfolder]: 1536/2998 cut-off events. [2023-09-01 14:07:21,823 INFO L131 PetriNetUnfolder]: For 75600/75600 co-relation queries the response was YES. [2023-09-01 14:07:21,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25073 conditions, 2998 events. 1536/2998 cut-off events. For 75600/75600 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 19757 event pairs, 240 based on Foata normal form. 2/3000 useless extension candidates. Maximal degree in co-relation 24971. Up to 2509 conditions per place. [2023-09-01 14:07:21,849 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 499 selfloop transitions, 126 changer transitions 36/661 dead transitions. [2023-09-01 14:07:21,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 661 transitions, 13020 flow [2023-09-01 14:07:21,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 14:07:21,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 14:07:21,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2539 transitions. [2023-09-01 14:07:21,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34700013666803337 [2023-09-01 14:07:21,856 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2539 transitions. [2023-09-01 14:07:21,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2539 transitions. [2023-09-01 14:07:21,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:07:21,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2539 transitions. [2023-09-01 14:07:21,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 94.03703703703704) internal successors, (2539), 27 states have internal predecessors, (2539), 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) [2023-09-01 14:07:21,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 271.0) internal successors, (7588), 28 states have internal predecessors, (7588), 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) [2023-09-01 14:07:21,863 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 271.0) internal successors, (7588), 28 states have internal predecessors, (7588), 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) [2023-09-01 14:07:21,863 INFO L175 Difference]: Start difference. First operand has 275 places, 555 transitions, 10622 flow. Second operand 27 states and 2539 transitions. [2023-09-01 14:07:21,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 661 transitions, 13020 flow [2023-09-01 14:07:22,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 661 transitions, 12426 flow, removed 160 selfloop flow, removed 18 redundant places. [2023-09-01 14:07:22,243 INFO L231 Difference]: Finished difference. Result has 295 places, 583 transitions, 11054 flow [2023-09-01 14:07:22,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=10054, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=11054, PETRI_PLACES=295, PETRI_TRANSITIONS=583} [2023-09-01 14:07:22,243 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 274 predicate places. [2023-09-01 14:07:22,243 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 583 transitions, 11054 flow [2023-09-01 14:07:22,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 90.53658536585365) internal successors, (3712), 41 states have internal predecessors, (3712), 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) [2023-09-01 14:07:22,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:07:22,244 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:07:22,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-09-01 14:07:22,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-09-01 14:07:22,445 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:07:22,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:07:22,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1567382327, now seen corresponding path program 17 times [2023-09-01 14:07:22,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:07:22,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621962002] [2023-09-01 14:07:22,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:07:22,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:07:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:07:23,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:07:23,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:07:23,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621962002] [2023-09-01 14:07:23,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621962002] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:07:23,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470084574] [2023-09-01 14:07:23,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:07:23,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:07:23,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:07:23,517 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:07:23,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-09-01 14:07:23,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 14:07:23,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:07:23,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 80 conjunts are in the unsatisfiable core [2023-09-01 14:07:23,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:07:24,175 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:07:24,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:07:24,177 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:07:24,182 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:07:24,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 18 [2023-09-01 14:07:24,308 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:07:24,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:07:24,676 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-09-01 14:07:24,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 66 [2023-09-01 14:07:25,475 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:07:25,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470084574] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:07:25,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:07:25,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 37 [2023-09-01 14:07:25,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069570338] [2023-09-01 14:07:25,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:07:25,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-09-01 14:07:25,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:07:25,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-09-01 14:07:25,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1300, Unknown=0, NotChecked=0, Total=1482 [2023-09-01 14:07:28,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 271 [2023-09-01 14:07:28,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 583 transitions, 11054 flow. Second operand has 39 states, 39 states have (on average 89.51282051282051) internal successors, (3491), 39 states have internal predecessors, (3491), 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) [2023-09-01 14:07:28,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:07:28,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 271 [2023-09-01 14:07:28,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:07:36,465 INFO L130 PetriNetUnfolder]: 1603/3134 cut-off events. [2023-09-01 14:07:36,465 INFO L131 PetriNetUnfolder]: For 78264/78264 co-relation queries the response was YES. [2023-09-01 14:07:36,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26337 conditions, 3134 events. 1603/3134 cut-off events. For 78264/78264 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 21032 event pairs, 226 based on Foata normal form. 1/3135 useless extension candidates. Maximal degree in co-relation 26228. Up to 830 conditions per place. [2023-09-01 14:07:36,495 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 398 selfloop transitions, 279 changer transitions 18/695 dead transitions. [2023-09-01 14:07:36,495 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 695 transitions, 13965 flow [2023-09-01 14:07:36,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 14:07:36,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 14:07:36,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2243 transitions. [2023-09-01 14:07:36,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3448646986469865 [2023-09-01 14:07:36,498 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2243 transitions. [2023-09-01 14:07:36,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2243 transitions. [2023-09-01 14:07:36,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:07:36,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2243 transitions. [2023-09-01 14:07:36,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 93.45833333333333) internal successors, (2243), 24 states have internal predecessors, (2243), 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) [2023-09-01 14:07:36,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 271.0) internal successors, (6775), 25 states have internal predecessors, (6775), 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) [2023-09-01 14:07:36,502 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 271.0) internal successors, (6775), 25 states have internal predecessors, (6775), 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) [2023-09-01 14:07:36,502 INFO L175 Difference]: Start difference. First operand has 295 places, 583 transitions, 11054 flow. Second operand 24 states and 2243 transitions. [2023-09-01 14:07:36,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 695 transitions, 13965 flow [2023-09-01 14:07:36,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 695 transitions, 13622 flow, removed 37 selfloop flow, removed 18 redundant places. [2023-09-01 14:07:36,959 INFO L231 Difference]: Finished difference. Result has 296 places, 604 transitions, 11826 flow [2023-09-01 14:07:36,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=10752, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=11826, PETRI_PLACES=296, PETRI_TRANSITIONS=604} [2023-09-01 14:07:36,960 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 275 predicate places. [2023-09-01 14:07:36,960 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 604 transitions, 11826 flow [2023-09-01 14:07:36,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 89.51282051282051) internal successors, (3491), 39 states have internal predecessors, (3491), 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) [2023-09-01 14:07:36,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:07:36,961 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:07:36,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-09-01 14:07:37,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-09-01 14:07:37,168 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:07:37,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:07:37,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1919810157, now seen corresponding path program 18 times [2023-09-01 14:07:37,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:07:37,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577563322] [2023-09-01 14:07:37,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:07:37,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:07:37,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:07:38,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:07:38,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:07:38,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577563322] [2023-09-01 14:07:38,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577563322] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:07:38,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290843766] [2023-09-01 14:07:38,032 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:07:38,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:07:38,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:07:38,033 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:07:38,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-09-01 14:07:38,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 14:07:38,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:07:38,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 80 conjunts are in the unsatisfiable core [2023-09-01 14:07:38,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:07:38,729 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:07:38,729 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 25 treesize of output 7 [2023-09-01 14:07:38,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:07:38,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:07:39,305 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:07:39,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 66 [2023-09-01 14:07:39,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:07:39,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290843766] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:07:39,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:07:39,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-09-01 14:07:39,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871478305] [2023-09-01 14:07:39,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:07:39,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-09-01 14:07:39,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:07:39,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-09-01 14:07:39,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1399, Unknown=0, NotChecked=0, Total=1640 [2023-09-01 14:07:42,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 271 [2023-09-01 14:07:42,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 604 transitions, 11826 flow. Second operand has 41 states, 41 states have (on average 89.53658536585365) internal successors, (3671), 41 states have internal predecessors, (3671), 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) [2023-09-01 14:07:42,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:07:42,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 271 [2023-09-01 14:07:42,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:07:56,979 WARN L222 SmtUtils]: Spent 5.07s on a formula simplification. DAG size of input: 90 DAG size of output: 66 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:08:05,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 14:08:10,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:08:10,415 INFO L130 PetriNetUnfolder]: 1707/3362 cut-off events. [2023-09-01 14:08:10,415 INFO L131 PetriNetUnfolder]: For 82719/82719 co-relation queries the response was YES. [2023-09-01 14:08:10,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28735 conditions, 3362 events. 1707/3362 cut-off events. For 82719/82719 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 23231 event pairs, 97 based on Foata normal form. 13/3375 useless extension candidates. Maximal degree in co-relation 28631. Up to 988 conditions per place. [2023-09-01 14:08:10,446 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 359 selfloop transitions, 395 changer transitions 39/793 dead transitions. [2023-09-01 14:08:10,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 793 transitions, 15307 flow [2023-09-01 14:08:10,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-09-01 14:08:10,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-09-01 14:08:10,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 4733 transitions. [2023-09-01 14:08:10,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34244989508718615 [2023-09-01 14:08:10,452 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 4733 transitions. [2023-09-01 14:08:10,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 4733 transitions. [2023-09-01 14:08:10,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:08:10,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 4733 transitions. [2023-09-01 14:08:10,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 92.80392156862744) internal successors, (4733), 51 states have internal predecessors, (4733), 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) [2023-09-01 14:08:10,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 271.0) internal successors, (14092), 52 states have internal predecessors, (14092), 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) [2023-09-01 14:08:10,467 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 271.0) internal successors, (14092), 52 states have internal predecessors, (14092), 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) [2023-09-01 14:08:10,467 INFO L175 Difference]: Start difference. First operand has 296 places, 604 transitions, 11826 flow. Second operand 51 states and 4733 transitions. [2023-09-01 14:08:10,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 793 transitions, 15307 flow [2023-09-01 14:08:10,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 793 transitions, 15083 flow, removed 82 selfloop flow, removed 13 redundant places. [2023-09-01 14:08:11,007 INFO L231 Difference]: Finished difference. Result has 346 places, 666 transitions, 13827 flow [2023-09-01 14:08:11,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=11669, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=338, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=13827, PETRI_PLACES=346, PETRI_TRANSITIONS=666} [2023-09-01 14:08:11,008 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 325 predicate places. [2023-09-01 14:08:11,008 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 666 transitions, 13827 flow [2023-09-01 14:08:11,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 89.53658536585365) internal successors, (3671), 41 states have internal predecessors, (3671), 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) [2023-09-01 14:08:11,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:08:11,009 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:08:11,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-09-01 14:08:11,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:08:11,213 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:08:11,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:08:11,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1480689643, now seen corresponding path program 19 times [2023-09-01 14:08:11,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:08:11,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597102862] [2023-09-01 14:08:11,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:08:11,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:08:11,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:08:12,200 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:08:12,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:08:12,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597102862] [2023-09-01 14:08:12,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597102862] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:08:12,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121467696] [2023-09-01 14:08:12,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:08:12,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:08:12,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:08:12,201 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:08:12,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-09-01 14:08:12,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:08:12,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 83 conjunts are in the unsatisfiable core [2023-09-01 14:08:12,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:08:13,030 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:08:13,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:08:13,450 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:08:13,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 66 [2023-09-01 14:08:14,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:08:14,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121467696] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:08:14,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:08:14,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-09-01 14:08:14,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327975710] [2023-09-01 14:08:14,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:08:14,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-09-01 14:08:14,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:08:14,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-09-01 14:08:14,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1425, Unknown=0, NotChecked=0, Total=1640 [2023-09-01 14:08:16,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 271 [2023-09-01 14:08:16,790 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 666 transitions, 13827 flow. Second operand has 41 states, 41 states have (on average 89.53658536585365) internal successors, (3671), 41 states have internal predecessors, (3671), 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) [2023-09-01 14:08:16,791 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:08:16,791 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 271 [2023-09-01 14:08:16,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:08:26,865 INFO L130 PetriNetUnfolder]: 1711/3360 cut-off events. [2023-09-01 14:08:26,865 INFO L131 PetriNetUnfolder]: For 91331/91331 co-relation queries the response was YES. [2023-09-01 14:08:26,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30439 conditions, 3360 events. 1711/3360 cut-off events. For 91331/91331 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 23140 event pairs, 103 based on Foata normal form. 3/3363 useless extension candidates. Maximal degree in co-relation 30321. Up to 982 conditions per place. [2023-09-01 14:08:26,895 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 365 selfloop transitions, 373 changer transitions 30/768 dead transitions. [2023-09-01 14:08:26,895 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 768 transitions, 16096 flow [2023-09-01 14:08:26,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-09-01 14:08:26,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-09-01 14:08:26,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3625 transitions. [2023-09-01 14:08:26,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34298419907275995 [2023-09-01 14:08:26,899 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3625 transitions. [2023-09-01 14:08:26,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3625 transitions. [2023-09-01 14:08:26,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:08:26,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3625 transitions. [2023-09-01 14:08:26,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 92.94871794871794) internal successors, (3625), 39 states have internal predecessors, (3625), 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) [2023-09-01 14:08:26,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 271.0) internal successors, (10840), 40 states have internal predecessors, (10840), 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) [2023-09-01 14:08:26,908 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 271.0) internal successors, (10840), 40 states have internal predecessors, (10840), 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) [2023-09-01 14:08:26,908 INFO L175 Difference]: Start difference. First operand has 346 places, 666 transitions, 13827 flow. Second operand 39 states and 3625 transitions. [2023-09-01 14:08:26,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 768 transitions, 16096 flow [2023-09-01 14:08:27,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 768 transitions, 15445 flow, removed 131 selfloop flow, removed 25 redundant places. [2023-09-01 14:08:27,407 INFO L231 Difference]: Finished difference. Result has 357 places, 668 transitions, 14145 flow [2023-09-01 14:08:27,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=13222, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=363, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=14145, PETRI_PLACES=357, PETRI_TRANSITIONS=668} [2023-09-01 14:08:27,408 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 336 predicate places. [2023-09-01 14:08:27,408 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 668 transitions, 14145 flow [2023-09-01 14:08:27,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 89.53658536585365) internal successors, (3671), 41 states have internal predecessors, (3671), 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) [2023-09-01 14:08:27,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:08:27,409 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:08:27,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-09-01 14:08:27,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:08:27,609 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:08:27,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:08:27,610 INFO L85 PathProgramCache]: Analyzing trace with hash -873840017, now seen corresponding path program 20 times [2023-09-01 14:08:27,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:08:27,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840039307] [2023-09-01 14:08:27,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:08:27,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:08:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:08:28,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:08:28,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:08:28,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840039307] [2023-09-01 14:08:28,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840039307] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:08:28,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221529671] [2023-09-01 14:08:28,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:08:28,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:08:28,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:08:28,520 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:08:28,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-09-01 14:08:28,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:08:28,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:08:28,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 98 conjunts are in the unsatisfiable core [2023-09-01 14:08:28,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:08:28,744 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 11 treesize of output 7 [2023-09-01 14:08:28,791 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 11 treesize of output 7 [2023-09-01 14:08:28,830 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 11 treesize of output 7 [2023-09-01 14:08:28,884 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 6 treesize of output 5 [2023-09-01 14:08:28,938 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 6 treesize of output 5 [2023-09-01 14:08:29,367 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:08:29,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:08:29,368 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:08:29,372 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:08:29,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 18 [2023-09-01 14:08:29,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:08:29,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:08:42,663 WARN L222 SmtUtils]: Spent 8.13s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:08:43,461 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:08:43,461 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 75 [2023-09-01 14:08:43,472 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 14:08:43,472 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 145 treesize of output 129 [2023-09-01 14:08:43,482 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 14:08:43,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 129 treesize of output 117 [2023-09-01 14:08:43,492 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 14:08:43,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 117 treesize of output 93 [2023-09-01 14:08:43,533 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:08:43,533 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 183 treesize of output 109 [2023-09-01 14:08:43,586 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-09-01 14:08:43,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 530 treesize of output 500 [2023-09-01 14:08:43,604 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:08:43,624 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:08:43,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 167 treesize of output 178 [2023-09-01 14:08:43,682 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-09-01 14:08:43,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 167 treesize of output 153 [2023-09-01 14:08:44,612 INFO L321 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2023-09-01 14:08:44,612 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 183 treesize of output 1 [2023-09-01 14:08:44,709 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:08:44,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221529671] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:08:44,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:08:44,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 40 [2023-09-01 14:08:44,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020803190] [2023-09-01 14:08:44,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:08:44,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-09-01 14:08:44,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:08:44,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-09-01 14:08:44,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1485, Unknown=4, NotChecked=0, Total=1722 [2023-09-01 14:08:47,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 271 [2023-09-01 14:08:47,452 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 668 transitions, 14145 flow. Second operand has 42 states, 42 states have (on average 69.45238095238095) internal successors, (2917), 42 states have internal predecessors, (2917), 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) [2023-09-01 14:08:47,452 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:08:47,452 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 271 [2023-09-01 14:08:47,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:08:51,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:09:06,314 WARN L222 SmtUtils]: Spent 14.80s on a formula simplification. DAG size of input: 113 DAG size of output: 112 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:09:08,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:09:27,366 WARN L222 SmtUtils]: Spent 18.18s on a formula simplification. DAG size of input: 129 DAG size of output: 114 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:09:30,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:09:32,718 INFO L130 PetriNetUnfolder]: 1720/3372 cut-off events. [2023-09-01 14:09:32,718 INFO L131 PetriNetUnfolder]: For 93619/93619 co-relation queries the response was YES. [2023-09-01 14:09:32,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30904 conditions, 3372 events. 1720/3372 cut-off events. For 93619/93619 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 22910 event pairs, 203 based on Foata normal form. 2/3374 useless extension candidates. Maximal degree in co-relation 30784. Up to 1313 conditions per place. [2023-09-01 14:09:32,753 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 447 selfloop transitions, 293 changer transitions 34/774 dead transitions. [2023-09-01 14:09:32,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 774 transitions, 16753 flow [2023-09-01 14:09:32,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-09-01 14:09:32,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-09-01 14:09:32,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2043 transitions. [2023-09-01 14:09:32,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26924090669478123 [2023-09-01 14:09:32,757 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2043 transitions. [2023-09-01 14:09:32,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2043 transitions. [2023-09-01 14:09:32,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:09:32,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2043 transitions. [2023-09-01 14:09:32,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 72.96428571428571) internal successors, (2043), 28 states have internal predecessors, (2043), 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) [2023-09-01 14:09:32,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 271.0) internal successors, (7859), 29 states have internal predecessors, (7859), 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) [2023-09-01 14:09:32,764 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 271.0) internal successors, (7859), 29 states have internal predecessors, (7859), 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) [2023-09-01 14:09:32,764 INFO L175 Difference]: Start difference. First operand has 357 places, 668 transitions, 14145 flow. Second operand 28 states and 2043 transitions. [2023-09-01 14:09:32,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 774 transitions, 16753 flow [2023-09-01 14:09:33,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 774 transitions, 16609 flow, removed 18 selfloop flow, removed 24 redundant places. [2023-09-01 14:09:33,565 INFO L231 Difference]: Finished difference. Result has 359 places, 677 transitions, 14858 flow [2023-09-01 14:09:33,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=14026, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=14858, PETRI_PLACES=359, PETRI_TRANSITIONS=677} [2023-09-01 14:09:33,566 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 338 predicate places. [2023-09-01 14:09:33,566 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 677 transitions, 14858 flow [2023-09-01 14:09:33,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 69.45238095238095) internal successors, (2917), 42 states have internal predecessors, (2917), 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) [2023-09-01 14:09:33,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:09:33,566 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:09:33,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-09-01 14:09:33,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-09-01 14:09:33,769 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:09:33,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:09:33,769 INFO L85 PathProgramCache]: Analyzing trace with hash -146005971, now seen corresponding path program 21 times [2023-09-01 14:09:33,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:09:33,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226344732] [2023-09-01 14:09:33,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:09:33,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:09:33,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:09:34,695 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:09:34,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:09:34,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226344732] [2023-09-01 14:09:34,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226344732] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:09:34,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878912408] [2023-09-01 14:09:34,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:09:34,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:09:34,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:09:34,697 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:09:34,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-09-01 14:09:34,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 14:09:34,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:09:34,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 70 conjunts are in the unsatisfiable core [2023-09-01 14:09:34,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:09:35,300 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:09:35,301 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 25 treesize of output 7 [2023-09-01 14:09:35,407 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:09:35,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:09:36,009 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:09:36,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 78 [2023-09-01 14:09:36,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:09:36,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878912408] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:09:36,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:09:36,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 31 [2023-09-01 14:09:36,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007052444] [2023-09-01 14:09:36,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:09:36,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 14:09:36,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:09:36,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 14:09:36,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2023-09-01 14:09:38,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 271 [2023-09-01 14:09:38,978 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 677 transitions, 14858 flow. Second operand has 33 states, 33 states have (on average 91.78787878787878) internal successors, (3029), 33 states have internal predecessors, (3029), 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) [2023-09-01 14:09:38,978 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:09:38,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 271 [2023-09-01 14:09:38,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:09:43,471 INFO L130 PetriNetUnfolder]: 1741/3414 cut-off events. [2023-09-01 14:09:43,471 INFO L131 PetriNetUnfolder]: For 102046/102046 co-relation queries the response was YES. [2023-09-01 14:09:43,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32267 conditions, 3414 events. 1741/3414 cut-off events. For 102046/102046 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 23267 event pairs, 287 based on Foata normal form. 3/3417 useless extension candidates. Maximal degree in co-relation 32142. Up to 3034 conditions per place. [2023-09-01 14:09:43,507 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 611 selfloop transitions, 121 changer transitions 33/765 dead transitions. [2023-09-01 14:09:43,507 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 765 transitions, 17051 flow [2023-09-01 14:09:43,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-09-01 14:09:43,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-09-01 14:09:43,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3585 transitions. [2023-09-01 14:09:43,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3481258496795494 [2023-09-01 14:09:43,510 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3585 transitions. [2023-09-01 14:09:43,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3585 transitions. [2023-09-01 14:09:43,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:09:43,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3585 transitions. [2023-09-01 14:09:43,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 94.34210526315789) internal successors, (3585), 38 states have internal predecessors, (3585), 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) [2023-09-01 14:09:43,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 271.0) internal successors, (10569), 39 states have internal predecessors, (10569), 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) [2023-09-01 14:09:43,518 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 271.0) internal successors, (10569), 39 states have internal predecessors, (10569), 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) [2023-09-01 14:09:43,518 INFO L175 Difference]: Start difference. First operand has 359 places, 677 transitions, 14858 flow. Second operand 38 states and 3585 transitions. [2023-09-01 14:09:43,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 765 transitions, 17051 flow [2023-09-01 14:09:44,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 765 transitions, 16810 flow, removed 19 selfloop flow, removed 14 redundant places. [2023-09-01 14:09:44,204 INFO L231 Difference]: Finished difference. Result has 385 places, 687 transitions, 15189 flow [2023-09-01 14:09:44,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=14633, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=15189, PETRI_PLACES=385, PETRI_TRANSITIONS=687} [2023-09-01 14:09:44,205 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 364 predicate places. [2023-09-01 14:09:44,205 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 687 transitions, 15189 flow [2023-09-01 14:09:44,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 91.78787878787878) internal successors, (3029), 33 states have internal predecessors, (3029), 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) [2023-09-01 14:09:44,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:09:44,206 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:09:44,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-09-01 14:09:44,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-09-01 14:09:44,406 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:09:44,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:09:44,407 INFO L85 PathProgramCache]: Analyzing trace with hash 293114543, now seen corresponding path program 22 times [2023-09-01 14:09:44,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:09:44,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446677100] [2023-09-01 14:09:44,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:09:44,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:09:44,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:09:45,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:09:45,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:09:45,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446677100] [2023-09-01 14:09:45,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446677100] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:09:45,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809439392] [2023-09-01 14:09:45,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:09:45,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:09:45,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:09:45,448 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:09:45,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-09-01 14:09:45,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:09:45,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:09:45,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 81 conjunts are in the unsatisfiable core [2023-09-01 14:09:45,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:09:46,096 INFO L321 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2023-09-01 14:09:46,097 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 22 [2023-09-01 14:09:46,332 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:09:46,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:09:46,957 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-09-01 14:09:46,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 69 [2023-09-01 14:09:47,878 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:09:47,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809439392] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:09:47,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:09:47,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 40 [2023-09-01 14:09:47,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549426679] [2023-09-01 14:09:47,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:09:47,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-09-01 14:09:47,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:09:47,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-09-01 14:09:47,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1500, Unknown=0, NotChecked=0, Total=1722 [2023-09-01 14:09:51,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 271 [2023-09-01 14:09:51,293 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 687 transitions, 15189 flow. Second operand has 42 states, 42 states have (on average 89.5) internal successors, (3759), 42 states have internal predecessors, (3759), 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) [2023-09-01 14:09:51,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:09:51,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 271 [2023-09-01 14:09:51,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:10:12,553 INFO L130 PetriNetUnfolder]: 1815/3574 cut-off events. [2023-09-01 14:10:12,553 INFO L131 PetriNetUnfolder]: For 108065/108065 co-relation queries the response was YES. [2023-09-01 14:10:12,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33920 conditions, 3574 events. 1815/3574 cut-off events. For 108065/108065 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 24856 event pairs, 247 based on Foata normal form. 11/3585 useless extension candidates. Maximal degree in co-relation 33789. Up to 920 conditions per place. [2023-09-01 14:10:12,591 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 481 selfloop transitions, 349 changer transitions 32/862 dead transitions. [2023-09-01 14:10:12,591 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 862 transitions, 19277 flow [2023-09-01 14:10:12,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-09-01 14:10:12,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-09-01 14:10:12,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3810 transitions. [2023-09-01 14:10:12,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34290342903429033 [2023-09-01 14:10:12,596 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3810 transitions. [2023-09-01 14:10:12,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3810 transitions. [2023-09-01 14:10:12,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:10:12,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3810 transitions. [2023-09-01 14:10:12,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 92.92682926829268) internal successors, (3810), 41 states have internal predecessors, (3810), 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) [2023-09-01 14:10:12,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 271.0) internal successors, (11382), 42 states have internal predecessors, (11382), 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) [2023-09-01 14:10:12,607 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 271.0) internal successors, (11382), 42 states have internal predecessors, (11382), 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) [2023-09-01 14:10:12,608 INFO L175 Difference]: Start difference. First operand has 385 places, 687 transitions, 15189 flow. Second operand 41 states and 3810 transitions. [2023-09-01 14:10:12,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 862 transitions, 19277 flow [2023-09-01 14:10:13,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 862 transitions, 18898 flow, removed 53 selfloop flow, removed 32 redundant places. [2023-09-01 14:10:13,309 INFO L231 Difference]: Finished difference. Result has 402 places, 733 transitions, 16737 flow [2023-09-01 14:10:13,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=14849, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=308, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=16737, PETRI_PLACES=402, PETRI_TRANSITIONS=733} [2023-09-01 14:10:13,311 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 381 predicate places. [2023-09-01 14:10:13,311 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 733 transitions, 16737 flow [2023-09-01 14:10:13,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 89.5) internal successors, (3759), 42 states have internal predecessors, (3759), 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) [2023-09-01 14:10:13,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:10:13,312 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:10:13,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-09-01 14:10:13,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:10:13,517 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:10:13,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:10:13,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1251386825, now seen corresponding path program 23 times [2023-09-01 14:10:13,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:10:13,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010345218] [2023-09-01 14:10:13,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:10:13,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:10:13,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:10:14,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:10:14,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:10:14,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010345218] [2023-09-01 14:10:14,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010345218] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:10:14,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743214301] [2023-09-01 14:10:14,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:10:14,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:10:14,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:10:14,496 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:10:14,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-09-01 14:10:14,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 14:10:14,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:10:14,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 74 conjunts are in the unsatisfiable core [2023-09-01 14:10:14,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:10:15,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:10:15,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:10:15,648 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:10:15,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 69 [2023-09-01 14:10:16,043 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:10:16,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743214301] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:10:16,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:10:16,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 35 [2023-09-01 14:10:16,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055369554] [2023-09-01 14:10:16,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:10:16,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-09-01 14:10:16,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:10:16,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-09-01 14:10:16,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1201, Unknown=0, NotChecked=0, Total=1332 [2023-09-01 14:10:20,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 271 [2023-09-01 14:10:20,436 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 733 transitions, 16737 flow. Second operand has 37 states, 37 states have (on average 91.64864864864865) internal successors, (3391), 37 states have internal predecessors, (3391), 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) [2023-09-01 14:10:20,436 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:10:20,436 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 271 [2023-09-01 14:10:20,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:10:26,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:10:30,097 INFO L130 PetriNetUnfolder]: 1876/3756 cut-off events. [2023-09-01 14:10:30,097 INFO L131 PetriNetUnfolder]: For 120464/120464 co-relation queries the response was YES. [2023-09-01 14:10:30,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36597 conditions, 3756 events. 1876/3756 cut-off events. For 120464/120464 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 27031 event pairs, 132 based on Foata normal form. 4/3760 useless extension candidates. Maximal degree in co-relation 36462. Up to 1236 conditions per place. [2023-09-01 14:10:30,134 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 429 selfloop transitions, 382 changer transitions 38/849 dead transitions. [2023-09-01 14:10:30,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 849 transitions, 19679 flow [2023-09-01 14:10:30,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-09-01 14:10:30,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-09-01 14:10:30,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3861 transitions. [2023-09-01 14:10:30,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34749347493474936 [2023-09-01 14:10:30,137 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3861 transitions. [2023-09-01 14:10:30,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3861 transitions. [2023-09-01 14:10:30,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:10:30,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3861 transitions. [2023-09-01 14:10:30,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 94.17073170731707) internal successors, (3861), 41 states have internal predecessors, (3861), 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) [2023-09-01 14:10:30,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 271.0) internal successors, (11382), 42 states have internal predecessors, (11382), 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) [2023-09-01 14:10:30,145 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 271.0) internal successors, (11382), 42 states have internal predecessors, (11382), 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) [2023-09-01 14:10:30,145 INFO L175 Difference]: Start difference. First operand has 402 places, 733 transitions, 16737 flow. Second operand 41 states and 3861 transitions. [2023-09-01 14:10:30,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 849 transitions, 19679 flow [2023-09-01 14:10:30,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 849 transitions, 19010 flow, removed 152 selfloop flow, removed 20 redundant places. [2023-09-01 14:10:30,909 INFO L231 Difference]: Finished difference. Result has 426 places, 753 transitions, 17601 flow [2023-09-01 14:10:30,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=16127, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=362, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=17601, PETRI_PLACES=426, PETRI_TRANSITIONS=753} [2023-09-01 14:10:30,911 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 405 predicate places. [2023-09-01 14:10:30,911 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 753 transitions, 17601 flow [2023-09-01 14:10:30,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 91.64864864864865) internal successors, (3391), 37 states have internal predecessors, (3391), 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) [2023-09-01 14:10:30,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:10:30,912 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:10:30,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-09-01 14:10:31,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:10:31,118 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:10:31,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:10:31,118 INFO L85 PathProgramCache]: Analyzing trace with hash 466362235, now seen corresponding path program 24 times [2023-09-01 14:10:31,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:10:31,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440772095] [2023-09-01 14:10:31,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:10:31,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:10:31,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:10:31,984 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:10:31,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:10:31,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440772095] [2023-09-01 14:10:31,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440772095] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:10:31,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554511454] [2023-09-01 14:10:31,985 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:10:31,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:10:31,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:10:31,986 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:10:31,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-09-01 14:10:32,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 14:10:32,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:10:32,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 79 conjunts are in the unsatisfiable core [2023-09-01 14:10:32,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:10:32,695 INFO L321 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2023-09-01 14:10:32,696 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 39 treesize of output 20 [2023-09-01 14:10:32,887 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:10:32,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:10:33,453 INFO L321 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2023-09-01 14:10:33,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 67 [2023-09-01 14:10:33,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:10:33,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554511454] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:10:33,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:10:33,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-09-01 14:10:33,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865580014] [2023-09-01 14:10:33,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:10:33,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-09-01 14:10:33,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:10:33,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-09-01 14:10:33,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1446, Unknown=0, NotChecked=0, Total=1640 [2023-09-01 14:10:39,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 271 [2023-09-01 14:10:39,159 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 753 transitions, 17601 flow. Second operand has 41 states, 41 states have (on average 90.53658536585365) internal successors, (3712), 41 states have internal predecessors, (3712), 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) [2023-09-01 14:10:39,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:10:39,159 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 271 [2023-09-01 14:10:39,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:10:47,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:10:49,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:10:55,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:10:57,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:10:59,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:11:06,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:11:06,410 INFO L130 PetriNetUnfolder]: 2101/4171 cut-off events. [2023-09-01 14:11:06,410 INFO L131 PetriNetUnfolder]: For 146486/146486 co-relation queries the response was YES. [2023-09-01 14:11:06,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41794 conditions, 4171 events. 2101/4171 cut-off events. For 146486/146486 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 30340 event pairs, 556 based on Foata normal form. 14/4185 useless extension candidates. Maximal degree in co-relation 41653. Up to 3511 conditions per place. [2023-09-01 14:11:06,457 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 735 selfloop transitions, 221 changer transitions 45/1001 dead transitions. [2023-09-01 14:11:06,457 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 1001 transitions, 23468 flow [2023-09-01 14:11:06,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-09-01 14:11:06,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-09-01 14:11:06,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4945 transitions. [2023-09-01 14:11:06,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34428740513820233 [2023-09-01 14:11:06,460 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4945 transitions. [2023-09-01 14:11:06,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4945 transitions. [2023-09-01 14:11:06,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:11:06,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4945 transitions. [2023-09-01 14:11:06,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 93.30188679245283) internal successors, (4945), 53 states have internal predecessors, (4945), 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) [2023-09-01 14:11:06,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 271.0) internal successors, (14634), 54 states have internal predecessors, (14634), 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) [2023-09-01 14:11:06,470 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 271.0) internal successors, (14634), 54 states have internal predecessors, (14634), 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) [2023-09-01 14:11:06,471 INFO L175 Difference]: Start difference. First operand has 426 places, 753 transitions, 17601 flow. Second operand 53 states and 4945 transitions. [2023-09-01 14:11:06,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 1001 transitions, 23468 flow [2023-09-01 14:11:07,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 1001 transitions, 22310 flow, removed 140 selfloop flow, removed 28 redundant places. [2023-09-01 14:11:07,566 INFO L231 Difference]: Finished difference. Result has 466 places, 878 transitions, 20266 flow [2023-09-01 14:11:07,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=16622, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=753, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=20266, PETRI_PLACES=466, PETRI_TRANSITIONS=878} [2023-09-01 14:11:07,568 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 445 predicate places. [2023-09-01 14:11:07,568 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 878 transitions, 20266 flow [2023-09-01 14:11:07,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 90.53658536585365) internal successors, (3712), 41 states have internal predecessors, (3712), 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) [2023-09-01 14:11:07,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:11:07,569 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:11:07,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-09-01 14:11:07,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:11:07,776 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:11:07,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:11:07,777 INFO L85 PathProgramCache]: Analyzing trace with hash 238203501, now seen corresponding path program 25 times [2023-09-01 14:11:07,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:11:07,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480864028] [2023-09-01 14:11:07,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:11:07,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:11:07,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:11:08,634 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:11:08,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:11:08,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480864028] [2023-09-01 14:11:08,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480864028] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:11:08,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273086735] [2023-09-01 14:11:08,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:11:08,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:11:08,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:11:08,635 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:11:08,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-09-01 14:11:08,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:11:08,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 78 conjunts are in the unsatisfiable core [2023-09-01 14:11:08,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:11:09,415 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:11:09,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:11:09,824 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:11:09,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 67 [2023-09-01 14:11:10,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:11:10,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273086735] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:11:10,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:11:10,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-09-01 14:11:10,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878195655] [2023-09-01 14:11:10,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:11:10,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-09-01 14:11:10,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:11:10,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-09-01 14:11:10,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1413, Unknown=0, NotChecked=0, Total=1640 [2023-09-01 14:11:13,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 271 [2023-09-01 14:11:13,430 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 878 transitions, 20266 flow. Second operand has 41 states, 41 states have (on average 89.53658536585365) internal successors, (3671), 41 states have internal predecessors, (3671), 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) [2023-09-01 14:11:13,430 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:11:13,430 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 271 [2023-09-01 14:11:13,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:11:21,115 INFO L130 PetriNetUnfolder]: 2144/4256 cut-off events. [2023-09-01 14:11:21,115 INFO L131 PetriNetUnfolder]: For 119056/119056 co-relation queries the response was YES. [2023-09-01 14:11:21,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42078 conditions, 4256 events. 2144/4256 cut-off events. For 119056/119056 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 31146 event pairs, 84 based on Foata normal form. 6/4262 useless extension candidates. Maximal degree in co-relation 41921. Up to 1462 conditions per place. [2023-09-01 14:11:21,168 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 551 selfloop transitions, 388 changer transitions 41/980 dead transitions. [2023-09-01 14:11:21,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 980 transitions, 23550 flow [2023-09-01 14:11:21,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-09-01 14:11:21,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-09-01 14:11:21,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3142 transitions. [2023-09-01 14:11:21,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3410028217929238 [2023-09-01 14:11:21,171 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3142 transitions. [2023-09-01 14:11:21,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3142 transitions. [2023-09-01 14:11:21,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:11:21,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3142 transitions. [2023-09-01 14:11:21,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 92.41176470588235) internal successors, (3142), 34 states have internal predecessors, (3142), 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) [2023-09-01 14:11:21,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 271.0) internal successors, (9485), 35 states have internal predecessors, (9485), 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) [2023-09-01 14:11:21,178 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 271.0) internal successors, (9485), 35 states have internal predecessors, (9485), 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) [2023-09-01 14:11:21,178 INFO L175 Difference]: Start difference. First operand has 466 places, 878 transitions, 20266 flow. Second operand 34 states and 3142 transitions. [2023-09-01 14:11:21,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 980 transitions, 23550 flow [2023-09-01 14:11:22,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 980 transitions, 22804 flow, removed 333 selfloop flow, removed 24 redundant places. [2023-09-01 14:11:22,404 INFO L231 Difference]: Finished difference. Result has 479 places, 894 transitions, 20886 flow [2023-09-01 14:11:22,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=19560, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=878, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=368, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=20886, PETRI_PLACES=479, PETRI_TRANSITIONS=894} [2023-09-01 14:11:22,405 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 458 predicate places. [2023-09-01 14:11:22,405 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 894 transitions, 20886 flow [2023-09-01 14:11:22,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 89.53658536585365) internal successors, (3671), 41 states have internal predecessors, (3671), 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) [2023-09-01 14:11:22,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:11:22,406 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:11:22,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-09-01 14:11:22,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-09-01 14:11:22,606 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:11:22,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:11:22,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1405158061, now seen corresponding path program 26 times [2023-09-01 14:11:22,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:11:22,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642903387] [2023-09-01 14:11:22,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:11:22,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:11:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:11:23,367 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:11:23,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:11:23,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642903387] [2023-09-01 14:11:23,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642903387] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:11:23,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371120937] [2023-09-01 14:11:23,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:11:23,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:11:23,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:11:23,369 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:11:23,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-09-01 14:11:23,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:11:23,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:11:23,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 80 conjunts are in the unsatisfiable core [2023-09-01 14:11:23,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:11:24,101 INFO L321 Elim1Store]: treesize reduction 9, result has 52.6 percent of original size [2023-09-01 14:11:24,101 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 37 treesize of output 22 [2023-09-01 14:11:24,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:11:24,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:11:24,941 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:11:24,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 118 treesize of output 147 [2023-09-01 14:11:26,548 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:11:26,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371120937] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:11:26,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:11:26,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-09-01 14:11:26,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303239494] [2023-09-01 14:11:26,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:11:26,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-09-01 14:11:26,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:11:26,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-09-01 14:11:26,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1420, Unknown=0, NotChecked=0, Total=1640 [2023-09-01 14:11:30,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 271 [2023-09-01 14:11:30,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 894 transitions, 20886 flow. Second operand has 41 states, 41 states have (on average 90.53658536585365) internal successors, (3712), 41 states have internal predecessors, (3712), 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) [2023-09-01 14:11:30,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:11:30,894 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 271 [2023-09-01 14:11:30,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:11:39,819 INFO L130 PetriNetUnfolder]: 2185/4306 cut-off events. [2023-09-01 14:11:39,820 INFO L131 PetriNetUnfolder]: For 126627/126627 co-relation queries the response was YES. [2023-09-01 14:11:39,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43002 conditions, 4306 events. 2185/4306 cut-off events. For 126627/126627 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 30985 event pairs, 638 based on Foata normal form. 3/4309 useless extension candidates. Maximal degree in co-relation 42842. Up to 4071 conditions per place. [2023-09-01 14:11:39,866 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 898 selfloop transitions, 84 changer transitions 21/1003 dead transitions. [2023-09-01 14:11:39,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 1003 transitions, 24438 flow [2023-09-01 14:11:39,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-09-01 14:11:39,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-09-01 14:11:39,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2714 transitions. [2023-09-01 14:11:39,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.345336556813844 [2023-09-01 14:11:39,868 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2714 transitions. [2023-09-01 14:11:39,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2714 transitions. [2023-09-01 14:11:39,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:11:39,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2714 transitions. [2023-09-01 14:11:39,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 93.58620689655173) internal successors, (2714), 29 states have internal predecessors, (2714), 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) [2023-09-01 14:11:39,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 271.0) internal successors, (8130), 30 states have internal predecessors, (8130), 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) [2023-09-01 14:11:39,875 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 271.0) internal successors, (8130), 30 states have internal predecessors, (8130), 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) [2023-09-01 14:11:39,875 INFO L175 Difference]: Start difference. First operand has 479 places, 894 transitions, 20886 flow. Second operand 29 states and 2714 transitions. [2023-09-01 14:11:39,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 1003 transitions, 24438 flow [2023-09-01 14:11:40,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 1003 transitions, 24303 flow, removed 25 selfloop flow, removed 21 redundant places. [2023-09-01 14:11:40,939 INFO L231 Difference]: Finished difference. Result has 494 places, 939 transitions, 22221 flow [2023-09-01 14:11:40,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=20759, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=894, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=817, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=22221, PETRI_PLACES=494, PETRI_TRANSITIONS=939} [2023-09-01 14:11:40,941 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 473 predicate places. [2023-09-01 14:11:40,941 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 939 transitions, 22221 flow [2023-09-01 14:11:40,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 90.53658536585365) internal successors, (3712), 41 states have internal predecessors, (3712), 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) [2023-09-01 14:11:40,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:11:40,942 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:11:40,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-09-01 14:11:41,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-09-01 14:11:41,148 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:11:41,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:11:41,149 INFO L85 PathProgramCache]: Analyzing trace with hash 966037547, now seen corresponding path program 27 times [2023-09-01 14:11:41,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:11:41,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515147108] [2023-09-01 14:11:41,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:11:41,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:11:41,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:11:42,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:11:42,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:11:42,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515147108] [2023-09-01 14:11:42,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515147108] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:11:42,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358263766] [2023-09-01 14:11:42,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:11:42,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:11:42,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:11:42,169 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:11:42,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-09-01 14:11:42,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 14:11:42,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:11:42,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 66 conjunts are in the unsatisfiable core [2023-09-01 14:11:42,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:11:42,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:11:42,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:11:43,192 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:11:43,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 80 [2023-09-01 14:11:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:11:43,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358263766] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:11:43,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:11:43,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 31 [2023-09-01 14:11:43,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081998179] [2023-09-01 14:11:43,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:11:43,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 14:11:43,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:11:43,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 14:11:43,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2023-09-01 14:11:45,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 271 [2023-09-01 14:11:45,348 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 939 transitions, 22221 flow. Second operand has 33 states, 33 states have (on average 92.78787878787878) internal successors, (3062), 33 states have internal predecessors, (3062), 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) [2023-09-01 14:11:45,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:11:45,348 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 271 [2023-09-01 14:11:45,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:11:48,362 INFO L130 PetriNetUnfolder]: 2203/4347 cut-off events. [2023-09-01 14:11:48,362 INFO L131 PetriNetUnfolder]: For 127838/127838 co-relation queries the response was YES. [2023-09-01 14:11:48,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43725 conditions, 4347 events. 2203/4347 cut-off events. For 127838/127838 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 31434 event pairs, 496 based on Foata normal form. 4/4351 useless extension candidates. Maximal degree in co-relation 43555. Up to 4100 conditions per place. [2023-09-01 14:11:48,409 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 895 selfloop transitions, 69 changer transitions 39/1003 dead transitions. [2023-09-01 14:11:48,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 1003 transitions, 24773 flow [2023-09-01 14:11:48,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-09-01 14:11:48,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-09-01 14:11:48,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2843 transitions. [2023-09-01 14:11:48,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34969249692496923 [2023-09-01 14:11:48,412 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2843 transitions. [2023-09-01 14:11:48,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2843 transitions. [2023-09-01 14:11:48,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:11:48,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2843 transitions. [2023-09-01 14:11:48,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 94.76666666666667) internal successors, (2843), 30 states have internal predecessors, (2843), 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) [2023-09-01 14:11:48,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 271.0) internal successors, (8401), 31 states have internal predecessors, (8401), 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) [2023-09-01 14:11:48,417 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 271.0) internal successors, (8401), 31 states have internal predecessors, (8401), 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) [2023-09-01 14:11:48,417 INFO L175 Difference]: Start difference. First operand has 494 places, 939 transitions, 22221 flow. Second operand 30 states and 2843 transitions. [2023-09-01 14:11:48,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 1003 transitions, 24773 flow [2023-09-01 14:11:49,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 1003 transitions, 24459 flow, removed 136 selfloop flow, removed 17 redundant places. [2023-09-01 14:11:49,602 INFO L231 Difference]: Finished difference. Result has 512 places, 943 transitions, 22102 flow [2023-09-01 14:11:49,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=21907, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=939, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=871, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=22102, PETRI_PLACES=512, PETRI_TRANSITIONS=943} [2023-09-01 14:11:49,603 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 491 predicate places. [2023-09-01 14:11:49,603 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 943 transitions, 22102 flow [2023-09-01 14:11:49,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 92.78787878787878) internal successors, (3062), 33 states have internal predecessors, (3062), 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) [2023-09-01 14:11:49,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:11:49,603 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:11:49,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-09-01 14:11:49,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-09-01 14:11:49,804 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:11:49,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:11:49,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1059899593, now seen corresponding path program 28 times [2023-09-01 14:11:49,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:11:49,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304223834] [2023-09-01 14:11:49,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:11:49,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:11:49,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:11:50,970 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:11:50,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:11:50,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304223834] [2023-09-01 14:11:50,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304223834] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:11:50,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113886205] [2023-09-01 14:11:50,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:11:50,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:11:50,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:11:50,972 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:11:50,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-09-01 14:11:51,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:11:51,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:11:51,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 73 conjunts are in the unsatisfiable core [2023-09-01 14:11:51,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:11:51,684 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:11:51,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:11:52,047 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:11:52,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 67 [2023-09-01 14:11:52,490 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:11:52,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113886205] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:11:52,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:11:52,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 10] total 36 [2023-09-01 14:11:52,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342118016] [2023-09-01 14:11:52,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:11:52,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-09-01 14:11:52,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:11:52,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-09-01 14:11:52,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1289, Unknown=0, NotChecked=0, Total=1406 [2023-09-01 14:11:57,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 271 [2023-09-01 14:11:57,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 943 transitions, 22102 flow. Second operand has 38 states, 38 states have (on average 86.60526315789474) internal successors, (3291), 38 states have internal predecessors, (3291), 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) [2023-09-01 14:11:57,524 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:11:57,524 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 271 [2023-09-01 14:11:57,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:12:03,714 INFO L130 PetriNetUnfolder]: 2195/4326 cut-off events. [2023-09-01 14:12:03,714 INFO L131 PetriNetUnfolder]: For 128199/128199 co-relation queries the response was YES. [2023-09-01 14:12:03,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43383 conditions, 4326 events. 2195/4326 cut-off events. For 128199/128199 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 31638 event pairs, 215 based on Foata normal form. 3/4323 useless extension candidates. Maximal degree in co-relation 43207. Up to 1959 conditions per place. [2023-09-01 14:12:03,763 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 614 selfloop transitions, 387 changer transitions 46/1047 dead transitions. [2023-09-01 14:12:03,763 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 1047 transitions, 25105 flow [2023-09-01 14:12:03,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-09-01 14:12:03,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-09-01 14:12:03,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3305 transitions. [2023-09-01 14:12:03,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32961005285728534 [2023-09-01 14:12:03,766 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3305 transitions. [2023-09-01 14:12:03,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3305 transitions. [2023-09-01 14:12:03,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:12:03,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3305 transitions. [2023-09-01 14:12:03,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 89.32432432432432) internal successors, (3305), 37 states have internal predecessors, (3305), 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) [2023-09-01 14:12:03,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 271.0) internal successors, (10298), 38 states have internal predecessors, (10298), 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) [2023-09-01 14:12:03,772 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 271.0) internal successors, (10298), 38 states have internal predecessors, (10298), 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) [2023-09-01 14:12:03,773 INFO L175 Difference]: Start difference. First operand has 512 places, 943 transitions, 22102 flow. Second operand 37 states and 3305 transitions. [2023-09-01 14:12:03,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 1047 transitions, 25105 flow [2023-09-01 14:12:04,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 1047 transitions, 24908 flow, removed 55 selfloop flow, removed 23 redundant places. [2023-09-01 14:12:04,982 INFO L231 Difference]: Finished difference. Result has 524 places, 944 transitions, 22728 flow [2023-09-01 14:12:04,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=21911, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=942, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=382, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=22728, PETRI_PLACES=524, PETRI_TRANSITIONS=944} [2023-09-01 14:12:04,985 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 503 predicate places. [2023-09-01 14:12:04,985 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 944 transitions, 22728 flow [2023-09-01 14:12:04,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 86.60526315789474) internal successors, (3291), 38 states have internal predecessors, (3291), 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) [2023-09-01 14:12:04,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:12:04,986 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:12:04,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-09-01 14:12:05,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-09-01 14:12:05,192 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:12:05,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:12:05,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1213639111, now seen corresponding path program 29 times [2023-09-01 14:12:05,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:12:05,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239254780] [2023-09-01 14:12:05,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:12:05,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:12:05,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:12:06,235 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:12:06,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:12:06,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239254780] [2023-09-01 14:12:06,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239254780] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:12:06,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787052331] [2023-09-01 14:12:06,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:12:06,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:12:06,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:12:06,237 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:12:06,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-09-01 14:12:06,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 14:12:06,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:12:06,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 96 conjunts are in the unsatisfiable core [2023-09-01 14:12:06,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:12:06,431 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 16 treesize of output 12 [2023-09-01 14:12:06,482 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 16 treesize of output 12 [2023-09-01 14:12:06,527 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 15 treesize of output 11 [2023-09-01 14:12:06,577 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 6 treesize of output 5 [2023-09-01 14:12:06,628 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 6 treesize of output 5 [2023-09-01 14:12:06,965 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:12:06,965 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 25 treesize of output 7 [2023-09-01 14:12:07,141 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:12:07,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:12:09,022 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:12:09,022 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 76 [2023-09-01 14:12:09,030 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:12:09,030 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 149 treesize of output 132 [2023-09-01 14:12:09,038 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:12:09,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 132 treesize of output 106 [2023-09-01 14:12:09,047 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:12:09,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 106 treesize of output 93 [2023-09-01 14:12:09,074 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:12:09,074 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 184 treesize of output 110 [2023-09-01 14:12:09,101 INFO L321 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-09-01 14:12:09,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 538 treesize of output 493 [2023-09-01 14:12:09,119 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:12:09,121 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:12:09,131 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:12:09,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 170 treesize of output 164 [2023-09-01 14:12:09,158 INFO L321 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-09-01 14:12:09,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 137 [2023-09-01 14:12:09,555 INFO L321 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2023-09-01 14:12:09,555 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 184 treesize of output 1 [2023-09-01 14:12:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:12:09,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787052331] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:12:09,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:12:09,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 40 [2023-09-01 14:12:09,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858768894] [2023-09-01 14:12:09,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:12:09,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-09-01 14:12:09,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:12:09,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-09-01 14:12:09,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1449, Unknown=6, NotChecked=0, Total=1722 [2023-09-01 14:12:11,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 271 [2023-09-01 14:12:11,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 944 transitions, 22728 flow. Second operand has 42 states, 42 states have (on average 69.4047619047619) internal successors, (2915), 42 states have internal predecessors, (2915), 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) [2023-09-01 14:12:11,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:12:11,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 271 [2023-09-01 14:12:11,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:12:18,432 WARN L222 SmtUtils]: Spent 6.55s on a formula simplification that was a NOOP. DAG size: 127 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:12:20,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:12:36,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:12:45,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 14:12:49,437 INFO L130 PetriNetUnfolder]: 2405/4729 cut-off events. [2023-09-01 14:12:49,438 INFO L131 PetriNetUnfolder]: For 158703/158703 co-relation queries the response was YES. [2023-09-01 14:12:49,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49191 conditions, 4729 events. 2405/4729 cut-off events. For 158703/158703 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 34670 event pairs, 114 based on Foata normal form. 10/4733 useless extension candidates. Maximal degree in co-relation 49014. Up to 2479 conditions per place. [2023-09-01 14:12:49,500 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 613 selfloop transitions, 541 changer transitions 33/1187 dead transitions. [2023-09-01 14:12:49,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 1187 transitions, 29512 flow [2023-09-01 14:12:49,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-09-01 14:12:49,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-09-01 14:12:49,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3759 transitions. [2023-09-01 14:12:49,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2667470905478286 [2023-09-01 14:12:49,504 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3759 transitions. [2023-09-01 14:12:49,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3759 transitions. [2023-09-01 14:12:49,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:12:49,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3759 transitions. [2023-09-01 14:12:49,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 72.28846153846153) internal successors, (3759), 52 states have internal predecessors, (3759), 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) [2023-09-01 14:12:49,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 271.0) internal successors, (14363), 53 states have internal predecessors, (14363), 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) [2023-09-01 14:12:49,512 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 271.0) internal successors, (14363), 53 states have internal predecessors, (14363), 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) [2023-09-01 14:12:49,512 INFO L175 Difference]: Start difference. First operand has 524 places, 944 transitions, 22728 flow. Second operand 52 states and 3759 transitions. [2023-09-01 14:12:49,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 1187 transitions, 29512 flow [2023-09-01 14:12:51,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 1187 transitions, 28607 flow, removed 69 selfloop flow, removed 28 redundant places. [2023-09-01 14:12:51,192 INFO L231 Difference]: Finished difference. Result has 556 places, 1078 transitions, 26936 flow [2023-09-01 14:12:51,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=21986, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=944, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=425, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=26936, PETRI_PLACES=556, PETRI_TRANSITIONS=1078} [2023-09-01 14:12:51,195 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 535 predicate places. [2023-09-01 14:12:51,195 INFO L495 AbstractCegarLoop]: Abstraction has has 556 places, 1078 transitions, 26936 flow [2023-09-01 14:12:51,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 69.4047619047619) internal successors, (2915), 42 states have internal predecessors, (2915), 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) [2023-09-01 14:12:51,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:12:51,196 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:12:51,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-09-01 14:12:51,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-09-01 14:12:51,402 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:12:51,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:12:51,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1938992087, now seen corresponding path program 30 times [2023-09-01 14:12:51,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:12:51,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514294615] [2023-09-01 14:12:51,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:12:51,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:12:51,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:12:52,517 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:12:52,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:12:52,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514294615] [2023-09-01 14:12:52,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514294615] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:12:52,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805823630] [2023-09-01 14:12:52,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:12:52,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:12:52,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:12:52,520 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:12:52,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-09-01 14:12:52,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 14:12:52,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:12:52,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 68 conjunts are in the unsatisfiable core [2023-09-01 14:12:52,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:12:53,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:12:53,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:12:53,948 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:12:53,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 77 [2023-09-01 14:12:54,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:12:54,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805823630] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:12:54,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:12:54,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 33 [2023-09-01 14:12:54,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654347444] [2023-09-01 14:12:54,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:12:54,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-09-01 14:12:54,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:12:54,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-09-01 14:12:54,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2023-09-01 14:12:59,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 271 [2023-09-01 14:12:59,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 1078 transitions, 26936 flow. Second operand has 35 states, 35 states have (on average 92.74285714285715) internal successors, (3246), 35 states have internal predecessors, (3246), 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) [2023-09-01 14:12:59,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:12:59,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 271 [2023-09-01 14:12:59,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:13:04,391 INFO L130 PetriNetUnfolder]: 2396/4703 cut-off events. [2023-09-01 14:13:04,391 INFO L131 PetriNetUnfolder]: For 160562/160562 co-relation queries the response was YES. [2023-09-01 14:13:04,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49657 conditions, 4703 events. 2396/4703 cut-off events. For 160562/160562 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 34296 event pairs, 493 based on Foata normal form. 7/4704 useless extension candidates. Maximal degree in co-relation 49472. Up to 4161 conditions per place. [2023-09-01 14:13:04,444 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 931 selfloop transitions, 158 changer transitions 61/1150 dead transitions. [2023-09-01 14:13:04,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 1150 transitions, 29749 flow [2023-09-01 14:13:04,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-09-01 14:13:04,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-09-01 14:13:04,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2960 transitions. [2023-09-01 14:13:04,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35233900726104034 [2023-09-01 14:13:04,446 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2960 transitions. [2023-09-01 14:13:04,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2960 transitions. [2023-09-01 14:13:04,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:13:04,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2960 transitions. [2023-09-01 14:13:04,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 95.48387096774194) internal successors, (2960), 31 states have internal predecessors, (2960), 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) [2023-09-01 14:13:04,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 271.0) internal successors, (8672), 32 states have internal predecessors, (8672), 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) [2023-09-01 14:13:04,452 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 271.0) internal successors, (8672), 32 states have internal predecessors, (8672), 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) [2023-09-01 14:13:04,452 INFO L175 Difference]: Start difference. First operand has 556 places, 1078 transitions, 26936 flow. Second operand 31 states and 2960 transitions. [2023-09-01 14:13:04,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 1150 transitions, 29749 flow [2023-09-01 14:13:05,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 1150 transitions, 29099 flow, removed 284 selfloop flow, removed 22 redundant places. [2023-09-01 14:13:05,812 INFO L231 Difference]: Finished difference. Result has 567 places, 1065 transitions, 26208 flow [2023-09-01 14:13:05,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=26252, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1075, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=918, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=26208, PETRI_PLACES=567, PETRI_TRANSITIONS=1065} [2023-09-01 14:13:05,813 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 546 predicate places. [2023-09-01 14:13:05,814 INFO L495 AbstractCegarLoop]: Abstraction has has 567 places, 1065 transitions, 26208 flow [2023-09-01 14:13:05,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 92.74285714285715) internal successors, (3246), 35 states have internal predecessors, (3246), 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) [2023-09-01 14:13:05,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:13:05,814 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:13:05,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-09-01 14:13:06,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:13:06,020 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:13:06,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:13:06,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1499871573, now seen corresponding path program 31 times [2023-09-01 14:13:06,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:13:06,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106788629] [2023-09-01 14:13:06,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:13:06,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:13:06,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:13:07,331 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:13:07,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:13:07,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106788629] [2023-09-01 14:13:07,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106788629] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:13:07,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584303972] [2023-09-01 14:13:07,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:13:07,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:13:07,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:13:07,332 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:13:07,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-09-01 14:13:07,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:13:07,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 80 conjunts are in the unsatisfiable core [2023-09-01 14:13:07,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:13:08,430 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:13:08,431 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 25 treesize of output 7 [2023-09-01 14:13:08,776 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:13:08,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:13:09,503 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:13:09,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 67 [2023-09-01 14:13:10,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:13:10,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584303972] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:13:10,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:13:10,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-09-01 14:13:10,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515922922] [2023-09-01 14:13:10,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:13:10,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-09-01 14:13:10,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:13:10,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-09-01 14:13:10,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1393, Unknown=0, NotChecked=0, Total=1640 [2023-09-01 14:13:17,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 271 [2023-09-01 14:13:17,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 567 places, 1065 transitions, 26208 flow. Second operand has 41 states, 41 states have (on average 89.53658536585365) internal successors, (3671), 41 states have internal predecessors, (3671), 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) [2023-09-01 14:13:17,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:13:17,031 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 271 [2023-09-01 14:13:17,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:13:26,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:13:34,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 14:13:45,895 WARN L222 SmtUtils]: Spent 5.82s on a formula simplification. DAG size of input: 83 DAG size of output: 58 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:13:52,277 INFO L130 PetriNetUnfolder]: 2459/4820 cut-off events. [2023-09-01 14:13:52,277 INFO L131 PetriNetUnfolder]: For 165346/165346 co-relation queries the response was YES. [2023-09-01 14:13:52,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50712 conditions, 4820 events. 2459/4820 cut-off events. For 165346/165346 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 35673 event pairs, 105 based on Foata normal form. 13/4827 useless extension candidates. Maximal degree in co-relation 50524. Up to 2116 conditions per place. [2023-09-01 14:13:52,336 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 689 selfloop transitions, 501 changer transitions 40/1230 dead transitions. [2023-09-01 14:13:52,336 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 597 places, 1230 transitions, 30966 flow [2023-09-01 14:13:52,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-09-01 14:13:52,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-09-01 14:13:52,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 4540 transitions. [2023-09-01 14:13:52,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3418932148505158 [2023-09-01 14:13:52,339 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 4540 transitions. [2023-09-01 14:13:52,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 4540 transitions. [2023-09-01 14:13:52,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:13:52,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 4540 transitions. [2023-09-01 14:13:52,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 92.65306122448979) internal successors, (4540), 49 states have internal predecessors, (4540), 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) [2023-09-01 14:13:52,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 271.0) internal successors, (13550), 50 states have internal predecessors, (13550), 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) [2023-09-01 14:13:52,352 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 271.0) internal successors, (13550), 50 states have internal predecessors, (13550), 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) [2023-09-01 14:13:52,352 INFO L175 Difference]: Start difference. First operand has 567 places, 1065 transitions, 26208 flow. Second operand 49 states and 4540 transitions. [2023-09-01 14:13:52,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 597 places, 1230 transitions, 30966 flow [2023-09-01 14:13:53,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 572 places, 1230 transitions, 30574 flow, removed 118 selfloop flow, removed 25 redundant places. [2023-09-01 14:13:53,883 INFO L231 Difference]: Finished difference. Result has 584 places, 1116 transitions, 28477 flow [2023-09-01 14:13:53,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=25757, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1062, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=450, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=28477, PETRI_PLACES=584, PETRI_TRANSITIONS=1116} [2023-09-01 14:13:53,884 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 563 predicate places. [2023-09-01 14:13:53,884 INFO L495 AbstractCegarLoop]: Abstraction has has 584 places, 1116 transitions, 28477 flow [2023-09-01 14:13:53,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 89.53658536585365) internal successors, (3671), 41 states have internal predecessors, (3671), 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) [2023-09-01 14:13:53,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:13:53,885 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:13:53,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-09-01 14:13:54,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:13:54,089 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:13:54,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:13:54,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1388879115, now seen corresponding path program 32 times [2023-09-01 14:13:54,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:13:54,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218769850] [2023-09-01 14:13:54,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:13:54,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:13:54,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:13:55,735 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:13:55,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:13:55,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218769850] [2023-09-01 14:13:55,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218769850] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:13:55,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247071936] [2023-09-01 14:13:55,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:13:55,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:13:55,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:13:55,736 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:13:55,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-09-01 14:13:55,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:13:55,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:13:55,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 81 conjunts are in the unsatisfiable core [2023-09-01 14:13:55,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:13:56,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:13:56,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-09-01 14:13:57,098 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:13:57,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:13:58,328 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:13:58,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 420 treesize of output 336 [2023-09-01 14:13:58,376 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:13:58,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 295 treesize of output 294 [2023-09-01 14:13:58,417 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:13:58,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 275 treesize of output 261 [2023-09-01 14:13:58,457 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:13:58,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 242 treesize of output 228 [2023-09-01 14:14:02,016 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:14:02,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247071936] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:14:02,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:14:02,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2023-09-01 14:14:02,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302540534] [2023-09-01 14:14:02,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:14:02,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-09-01 14:14:02,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:14:02,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-09-01 14:14:02,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1702, Unknown=1, NotChecked=0, Total=1892 [2023-09-01 14:14:09,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 271 [2023-09-01 14:14:09,624 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 584 places, 1116 transitions, 28477 flow. Second operand has 44 states, 44 states have (on average 72.43181818181819) internal successors, (3187), 44 states have internal predecessors, (3187), 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) [2023-09-01 14:14:09,624 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:14:09,624 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 271 [2023-09-01 14:14:09,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:14:28,222 INFO L130 PetriNetUnfolder]: 2638/5149 cut-off events. [2023-09-01 14:14:28,222 INFO L131 PetriNetUnfolder]: For 193978/193978 co-relation queries the response was YES. [2023-09-01 14:14:28,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56382 conditions, 5149 events. 2638/5149 cut-off events. For 193978/193978 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 38463 event pairs, 296 based on Foata normal form. 4/5143 useless extension candidates. Maximal degree in co-relation 56191. Up to 3911 conditions per place. [2023-09-01 14:14:28,290 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 916 selfloop transitions, 357 changer transitions 65/1338 dead transitions. [2023-09-01 14:14:28,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 619 places, 1338 transitions, 35102 flow [2023-09-01 14:14:28,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-09-01 14:14:28,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-09-01 14:14:28,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3343 transitions. [2023-09-01 14:14:28,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2803589399530359 [2023-09-01 14:14:28,293 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3343 transitions. [2023-09-01 14:14:28,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3343 transitions. [2023-09-01 14:14:28,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:14:28,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3343 transitions. [2023-09-01 14:14:28,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 75.97727272727273) internal successors, (3343), 44 states have internal predecessors, (3343), 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) [2023-09-01 14:14:28,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 271.0) internal successors, (12195), 45 states have internal predecessors, (12195), 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) [2023-09-01 14:14:28,303 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 271.0) internal successors, (12195), 45 states have internal predecessors, (12195), 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) [2023-09-01 14:14:28,303 INFO L175 Difference]: Start difference. First operand has 584 places, 1116 transitions, 28477 flow. Second operand 44 states and 3343 transitions. [2023-09-01 14:14:28,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 619 places, 1338 transitions, 35102 flow [2023-09-01 14:14:30,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 586 places, 1338 transitions, 34322 flow, removed 249 selfloop flow, removed 33 redundant places. [2023-09-01 14:14:30,279 INFO L231 Difference]: Finished difference. Result has 608 places, 1196 transitions, 31934 flow [2023-09-01 14:14:30,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=27795, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=766, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=31934, PETRI_PLACES=608, PETRI_TRANSITIONS=1196} [2023-09-01 14:14:30,280 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 587 predicate places. [2023-09-01 14:14:30,280 INFO L495 AbstractCegarLoop]: Abstraction has has 608 places, 1196 transitions, 31934 flow [2023-09-01 14:14:30,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 72.43181818181819) internal successors, (3187), 44 states have internal predecessors, (3187), 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) [2023-09-01 14:14:30,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:14:30,281 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:14:30,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-09-01 14:14:30,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:14:30,481 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:14:30,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:14:30,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1667642457, now seen corresponding path program 33 times [2023-09-01 14:14:30,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:14:30,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948658062] [2023-09-01 14:14:30,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:14:30,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:14:30,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:14:31,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:14:31,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:14:31,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948658062] [2023-09-01 14:14:31,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948658062] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:14:31,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511828137] [2023-09-01 14:14:31,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:14:31,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:14:31,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:14:31,845 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:14:31,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-09-01 14:14:32,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 14:14:32,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:14:32,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 76 conjunts are in the unsatisfiable core [2023-09-01 14:14:32,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:14:32,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:14:32,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-09-01 14:14:33,283 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:14:33,283 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 25 treesize of output 7 [2023-09-01 14:14:33,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:14:33,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:14:34,716 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:14:34,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 240 treesize of output 207 [2023-09-01 14:14:34,761 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:14:34,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 166 treesize of output 165 [2023-09-01 14:14:34,799 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:14:34,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 146 treesize of output 145 [2023-09-01 14:14:34,809 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 126 treesize of output 119 [2023-09-01 14:14:36,183 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:14:36,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511828137] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:14:36,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:14:36,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 36 [2023-09-01 14:14:36,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119805690] [2023-09-01 14:14:36,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:14:36,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-09-01 14:14:36,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:14:36,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-09-01 14:14:36,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1256, Unknown=1, NotChecked=0, Total=1406 [2023-09-01 14:14:37,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 271 [2023-09-01 14:14:37,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 608 places, 1196 transitions, 31934 flow. Second operand has 38 states, 38 states have (on average 72.55263157894737) internal successors, (2757), 38 states have internal predecessors, (2757), 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) [2023-09-01 14:14:37,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:14:37,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 271 [2023-09-01 14:14:37,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:14:48,597 INFO L130 PetriNetUnfolder]: 2615/5090 cut-off events. [2023-09-01 14:14:48,597 INFO L131 PetriNetUnfolder]: For 200351/200351 co-relation queries the response was YES. [2023-09-01 14:14:48,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56665 conditions, 5090 events. 2615/5090 cut-off events. For 200351/200351 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 37823 event pairs, 317 based on Foata normal form. 3/5087 useless extension candidates. Maximal degree in co-relation 56459. Up to 4473 conditions per place. [2023-09-01 14:14:48,666 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 1035 selfloop transitions, 222 changer transitions 24/1281 dead transitions. [2023-09-01 14:14:48,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 622 places, 1281 transitions, 35396 flow [2023-09-01 14:14:48,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-09-01 14:14:48,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-09-01 14:14:48,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2489 transitions. [2023-09-01 14:14:48,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2783182377278318 [2023-09-01 14:14:48,669 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2489 transitions. [2023-09-01 14:14:48,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2489 transitions. [2023-09-01 14:14:48,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:14:48,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2489 transitions. [2023-09-01 14:14:48,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 75.42424242424242) internal successors, (2489), 33 states have internal predecessors, (2489), 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) [2023-09-01 14:14:48,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 271.0) internal successors, (9214), 34 states have internal predecessors, (9214), 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) [2023-09-01 14:14:48,674 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 271.0) internal successors, (9214), 34 states have internal predecessors, (9214), 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) [2023-09-01 14:14:48,674 INFO L175 Difference]: Start difference. First operand has 608 places, 1196 transitions, 31934 flow. Second operand 33 states and 2489 transitions. [2023-09-01 14:14:48,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 622 places, 1281 transitions, 35396 flow [2023-09-01 14:14:50,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 594 places, 1281 transitions, 34921 flow, removed 169 selfloop flow, removed 28 redundant places. [2023-09-01 14:14:50,704 INFO L231 Difference]: Finished difference. Result has 604 places, 1213 transitions, 32490 flow [2023-09-01 14:14:50,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=31485, PETRI_DIFFERENCE_MINUEND_PLACES=562, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=982, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=32490, PETRI_PLACES=604, PETRI_TRANSITIONS=1213} [2023-09-01 14:14:50,705 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 583 predicate places. [2023-09-01 14:14:50,705 INFO L495 AbstractCegarLoop]: Abstraction has has 604 places, 1213 transitions, 32490 flow [2023-09-01 14:14:50,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 72.55263157894737) internal successors, (2757), 38 states have internal predecessors, (2757), 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) [2023-09-01 14:14:50,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:14:50,706 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:14:50,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-09-01 14:14:50,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-09-01 14:14:50,912 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:14:50,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:14:50,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1869265919, now seen corresponding path program 34 times [2023-09-01 14:14:50,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:14:50,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136126429] [2023-09-01 14:14:50,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:14:50,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:14:50,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:14:52,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:14:52,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:14:52,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136126429] [2023-09-01 14:14:52,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136126429] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:14:52,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43775982] [2023-09-01 14:14:52,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:14:52,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:14:52,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:14:52,726 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:14:52,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-09-01 14:14:52,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:14:52,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:14:52,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 85 conjunts are in the unsatisfiable core [2023-09-01 14:14:52,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:14:53,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:14:53,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2023-09-01 14:14:54,092 INFO L321 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2023-09-01 14:14:54,093 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 22 [2023-09-01 14:14:54,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:14:54,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:14:55,646 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-09-01 14:14:55,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 94 [2023-09-01 14:14:55,659 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:14:55,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 49 treesize of output 36 [2023-09-01 14:14:57,062 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:14:57,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43775982] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:14:57,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:14:57,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2023-09-01 14:14:57,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289012917] [2023-09-01 14:14:57,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:14:57,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-09-01 14:14:57,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:14:57,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-09-01 14:14:57,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1668, Unknown=4, NotChecked=0, Total=1892 [2023-09-01 14:15:02,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 271 [2023-09-01 14:15:02,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 1213 transitions, 32490 flow. Second operand has 44 states, 44 states have (on average 69.43181818181819) internal successors, (3055), 44 states have internal predecessors, (3055), 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) [2023-09-01 14:15:02,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:15:02,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 271 [2023-09-01 14:15:02,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:15:12,004 INFO L130 PetriNetUnfolder]: 2504/4905 cut-off events. [2023-09-01 14:15:12,004 INFO L131 PetriNetUnfolder]: For 197961/197961 co-relation queries the response was YES. [2023-09-01 14:15:12,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54501 conditions, 4905 events. 2504/4905 cut-off events. For 197961/197961 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 36364 event pairs, 220 based on Foata normal form. 51/4950 useless extension candidates. Maximal degree in co-relation 54298. Up to 1134 conditions per place. [2023-09-01 14:15:12,069 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 727 selfloop transitions, 494 changer transitions 39/1260 dead transitions. [2023-09-01 14:15:12,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 1260 transitions, 34959 flow [2023-09-01 14:15:12,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-09-01 14:15:12,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-09-01 14:15:12,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2116 transitions. [2023-09-01 14:15:12,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2692454510752004 [2023-09-01 14:15:12,072 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2116 transitions. [2023-09-01 14:15:12,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2116 transitions. [2023-09-01 14:15:12,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:15:12,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2116 transitions. [2023-09-01 14:15:12,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 72.96551724137932) internal successors, (2116), 29 states have internal predecessors, (2116), 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) [2023-09-01 14:15:12,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 271.0) internal successors, (8130), 30 states have internal predecessors, (8130), 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) [2023-09-01 14:15:12,080 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 271.0) internal successors, (8130), 30 states have internal predecessors, (8130), 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) [2023-09-01 14:15:12,080 INFO L175 Difference]: Start difference. First operand has 604 places, 1213 transitions, 32490 flow. Second operand 29 states and 2116 transitions. [2023-09-01 14:15:12,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 1260 transitions, 34959 flow [2023-09-01 14:15:13,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 590 places, 1260 transitions, 33567 flow, removed 121 selfloop flow, removed 31 redundant places. [2023-09-01 14:15:13,982 INFO L231 Difference]: Finished difference. Result has 599 places, 1143 transitions, 30549 flow [2023-09-01 14:15:13,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=29321, PETRI_DIFFERENCE_MINUEND_PLACES=562, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=477, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=661, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=30549, PETRI_PLACES=599, PETRI_TRANSITIONS=1143} [2023-09-01 14:15:13,983 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 578 predicate places. [2023-09-01 14:15:13,983 INFO L495 AbstractCegarLoop]: Abstraction has has 599 places, 1143 transitions, 30549 flow [2023-09-01 14:15:13,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 69.43181818181819) internal successors, (3055), 44 states have internal predecessors, (3055), 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) [2023-09-01 14:15:13,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:15:13,984 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:15:13,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-09-01 14:15:14,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-09-01 14:15:14,190 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:15:14,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:15:14,190 INFO L85 PathProgramCache]: Analyzing trace with hash -230793813, now seen corresponding path program 35 times [2023-09-01 14:15:14,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:15:14,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141742348] [2023-09-01 14:15:14,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:15:14,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:15:14,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:15:15,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:15:15,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:15:15,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141742348] [2023-09-01 14:15:15,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141742348] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:15:15,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522069879] [2023-09-01 14:15:15,614 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:15:15,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:15:15,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:15:15,616 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:15:15,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-09-01 14:15:15,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 14:15:15,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:15:15,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 80 conjunts are in the unsatisfiable core [2023-09-01 14:15:15,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:15:16,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:15:16,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2023-09-01 14:15:16,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:15:16,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:15:17,670 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:15:17,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 94 [2023-09-01 14:15:17,681 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:15:17,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 49 treesize of output 36 [2023-09-01 14:15:18,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:15:18,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522069879] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:15:18,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:15:18,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 11] total 38 [2023-09-01 14:15:18,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684182635] [2023-09-01 14:15:18,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:15:18,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-09-01 14:15:18,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:15:18,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-09-01 14:15:18,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1434, Unknown=6, NotChecked=0, Total=1560 [2023-09-01 14:15:19,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 271 [2023-09-01 14:15:19,654 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 599 places, 1143 transitions, 30549 flow. Second operand has 40 states, 40 states have (on average 72.525) internal successors, (2901), 40 states have internal predecessors, (2901), 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) [2023-09-01 14:15:19,654 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:15:19,654 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 271 [2023-09-01 14:15:19,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:15:29,487 INFO L130 PetriNetUnfolder]: 2486/4864 cut-off events. [2023-09-01 14:15:29,487 INFO L131 PetriNetUnfolder]: For 190473/190473 co-relation queries the response was YES. [2023-09-01 14:15:29,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53820 conditions, 4864 events. 2486/4864 cut-off events. For 190473/190473 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 35565 event pairs, 75 based on Foata normal form. 3/4861 useless extension candidates. Maximal degree in co-relation 53620. Up to 1785 conditions per place. [2023-09-01 14:15:29,547 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 673 selfloop transitions, 498 changer transitions 48/1219 dead transitions. [2023-09-01 14:15:29,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 615 places, 1219 transitions, 33613 flow [2023-09-01 14:15:29,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-09-01 14:15:29,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-09-01 14:15:29,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2196 transitions. [2023-09-01 14:15:29,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2794248632141494 [2023-09-01 14:15:29,550 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2196 transitions. [2023-09-01 14:15:29,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2196 transitions. [2023-09-01 14:15:29,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:15:29,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2196 transitions. [2023-09-01 14:15:29,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 75.72413793103448) internal successors, (2196), 29 states have internal predecessors, (2196), 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) [2023-09-01 14:15:29,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 271.0) internal successors, (8130), 30 states have internal predecessors, (8130), 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) [2023-09-01 14:15:29,556 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 271.0) internal successors, (8130), 30 states have internal predecessors, (8130), 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) [2023-09-01 14:15:29,556 INFO L175 Difference]: Start difference. First operand has 599 places, 1143 transitions, 30549 flow. Second operand 29 states and 2196 transitions. [2023-09-01 14:15:29,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 615 places, 1219 transitions, 33613 flow [2023-09-01 14:15:31,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 579 places, 1219 transitions, 31813 flow, removed 124 selfloop flow, removed 36 redundant places. [2023-09-01 14:15:31,314 INFO L231 Difference]: Finished difference. Result has 585 places, 1130 transitions, 29448 flow [2023-09-01 14:15:31,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=28767, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=496, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=29448, PETRI_PLACES=585, PETRI_TRANSITIONS=1130} [2023-09-01 14:15:31,315 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 564 predicate places. [2023-09-01 14:15:31,315 INFO L495 AbstractCegarLoop]: Abstraction has has 585 places, 1130 transitions, 29448 flow [2023-09-01 14:15:31,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 72.525) internal successors, (2901), 40 states have internal predecessors, (2901), 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) [2023-09-01 14:15:31,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:15:31,316 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:15:31,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-09-01 14:15:31,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-09-01 14:15:31,516 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:15:31,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:15:31,516 INFO L85 PathProgramCache]: Analyzing trace with hash 272795179, now seen corresponding path program 36 times [2023-09-01 14:15:31,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:15:31,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807967778] [2023-09-01 14:15:31,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:15:31,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:15:31,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:15:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:15:32,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:15:32,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807967778] [2023-09-01 14:15:32,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807967778] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:15:32,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979562876] [2023-09-01 14:15:32,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:15:32,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:15:32,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:15:32,793 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:15:32,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-09-01 14:15:32,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 14:15:32,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:15:33,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 80 conjunts are in the unsatisfiable core [2023-09-01 14:15:33,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:15:33,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:15:33,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-09-01 14:15:34,031 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:15:34,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:15:34,805 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (* c_~q_front~0 4))) (let ((.cse0 (+ c_~q~0.offset (* 4 c_~q_back~0))) (.cse2 (+ .cse5 c_~q~0.offset)) (.cse3 (+ .cse5 c_~q~0.offset 4))) (and (or (forall ((v_ArrVal_1617 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1617) c_~q~0.base) .cse0) 1))) (= (mod (+ c_~y~0 (* c_~C~0 3)) 4294967296) (mod (+ (* c_~C~0 2) c_~x~0) 4294967296))) (forall ((v_ArrVal_1617 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1617) c_~q~0.base))) (or (< |c_thread1Thread1of1ForFork0_~i~0#1| (+ (select .cse1 .cse2) (select .cse1 .cse3))) (not (= (select .cse1 .cse0) 1))))) (forall ((v_ArrVal_1617 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1617) c_~q~0.base))) (or (not (= (select .cse4 .cse0) 1)) (< (+ (select .cse4 .cse2) (select .cse4 .cse3)) (+ 2 |c_thread1Thread1of1ForFork0_~i~0#1|)))))))) is different from false [2023-09-01 14:15:34,854 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:15:34,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 240 treesize of output 207 [2023-09-01 14:15:34,877 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:15:34,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 166 treesize of output 165 [2023-09-01 14:15:34,898 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:15:34,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 146 treesize of output 145 [2023-09-01 14:15:34,904 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 126 treesize of output 119 [2023-09-01 14:15:36,041 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:15:36,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979562876] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:15:36,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:15:36,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 11] total 38 [2023-09-01 14:15:36,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024266762] [2023-09-01 14:15:36,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:15:36,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-09-01 14:15:36,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:15:36,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-09-01 14:15:36,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1368, Unknown=1, NotChecked=74, Total=1560 [2023-09-01 14:15:36,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 271 [2023-09-01 14:15:36,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 585 places, 1130 transitions, 29448 flow. Second operand has 40 states, 40 states have (on average 72.525) internal successors, (2901), 40 states have internal predecessors, (2901), 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) [2023-09-01 14:15:36,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:15:36,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 271 [2023-09-01 14:15:36,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:15:42,161 INFO L130 PetriNetUnfolder]: 2435/4749 cut-off events. [2023-09-01 14:15:42,161 INFO L131 PetriNetUnfolder]: For 180159/180159 co-relation queries the response was YES. [2023-09-01 14:15:42,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51411 conditions, 4749 events. 2435/4749 cut-off events. For 180159/180159 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 34466 event pairs, 293 based on Foata normal form. 2/4737 useless extension candidates. Maximal degree in co-relation 51217. Up to 4351 conditions per place. [2023-09-01 14:15:42,218 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 1024 selfloop transitions, 114 changer transitions 39/1177 dead transitions. [2023-09-01 14:15:42,218 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 1177 transitions, 32089 flow [2023-09-01 14:15:42,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-09-01 14:15:42,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-09-01 14:15:42,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1877 transitions. [2023-09-01 14:15:42,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2770479704797048 [2023-09-01 14:15:42,220 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1877 transitions. [2023-09-01 14:15:42,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1877 transitions. [2023-09-01 14:15:42,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:15:42,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1877 transitions. [2023-09-01 14:15:42,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 75.08) internal successors, (1877), 25 states have internal predecessors, (1877), 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) [2023-09-01 14:15:42,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 271.0) internal successors, (7046), 26 states have internal predecessors, (7046), 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) [2023-09-01 14:15:42,225 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 271.0) internal successors, (7046), 26 states have internal predecessors, (7046), 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) [2023-09-01 14:15:42,225 INFO L175 Difference]: Start difference. First operand has 585 places, 1130 transitions, 29448 flow. Second operand 25 states and 1877 transitions. [2023-09-01 14:15:42,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 1177 transitions, 32089 flow [2023-09-01 14:15:43,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 1177 transitions, 31752 flow, removed 34 selfloop flow, removed 28 redundant places. [2023-09-01 14:15:43,946 INFO L231 Difference]: Finished difference. Result has 568 places, 1118 transitions, 28870 flow [2023-09-01 14:15:43,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=29113, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1016, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=28870, PETRI_PLACES=568, PETRI_TRANSITIONS=1118} [2023-09-01 14:15:43,947 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 547 predicate places. [2023-09-01 14:15:43,947 INFO L495 AbstractCegarLoop]: Abstraction has has 568 places, 1118 transitions, 28870 flow [2023-09-01 14:15:43,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 72.525) internal successors, (2901), 40 states have internal predecessors, (2901), 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) [2023-09-01 14:15:43,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:15:43,948 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:15:43,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-09-01 14:15:44,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-09-01 14:15:44,149 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:15:44,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:15:44,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1052465565, now seen corresponding path program 37 times [2023-09-01 14:15:44,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:15:44,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928287315] [2023-09-01 14:15:44,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:15:44,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:15:44,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:15:45,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:15:45,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:15:45,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928287315] [2023-09-01 14:15:45,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928287315] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:15:45,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176509845] [2023-09-01 14:15:45,842 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:15:45,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:15:45,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:15:45,843 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:15:45,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-09-01 14:15:45,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:15:45,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 74 conjunts are in the unsatisfiable core [2023-09-01 14:15:45,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:15:45,986 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 44 treesize of output 42 [2023-09-01 14:15:46,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-09-01 14:15:46,919 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:15:46,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:15:48,021 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:15:48,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 148 treesize of output 141 [2023-09-01 14:15:48,047 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:15:48,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 100 treesize of output 99 [2023-09-01 14:15:48,054 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 80 treesize of output 73 [2023-09-01 14:15:49,443 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:15:49,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176509845] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:15:49,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:15:49,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 36 [2023-09-01 14:15:49,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564761261] [2023-09-01 14:15:49,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:15:49,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-09-01 14:15:49,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:15:49,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-09-01 14:15:49,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1301, Unknown=4, NotChecked=0, Total=1406 [2023-09-01 14:15:56,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 271 [2023-09-01 14:15:56,744 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 568 places, 1118 transitions, 28870 flow. Second operand has 38 states, 38 states have (on average 69.55263157894737) internal successors, (2643), 38 states have internal predecessors, (2643), 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) [2023-09-01 14:15:56,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:15:56,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 271 [2023-09-01 14:15:56,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:16:08,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:16:12,807 INFO L130 PetriNetUnfolder]: 2403/4676 cut-off events. [2023-09-01 14:16:12,807 INFO L131 PetriNetUnfolder]: For 173828/173828 co-relation queries the response was YES. [2023-09-01 14:16:12,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50210 conditions, 4676 events. 2403/4676 cut-off events. For 173828/173828 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 33764 event pairs, 42 based on Foata normal form. 2/4664 useless extension candidates. Maximal degree in co-relation 50021. Up to 1855 conditions per place. [2023-09-01 14:16:12,872 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 698 selfloop transitions, 475 changer transitions 22/1195 dead transitions. [2023-09-01 14:16:12,872 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 1195 transitions, 31734 flow [2023-09-01 14:16:12,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-09-01 14:16:12,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-09-01 14:16:12,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2386 transitions. [2023-09-01 14:16:12,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26680084982668006 [2023-09-01 14:16:12,875 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2386 transitions. [2023-09-01 14:16:12,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2386 transitions. [2023-09-01 14:16:12,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:16:12,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2386 transitions. [2023-09-01 14:16:12,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 72.3030303030303) internal successors, (2386), 33 states have internal predecessors, (2386), 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) [2023-09-01 14:16:12,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 271.0) internal successors, (9214), 34 states have internal predecessors, (9214), 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) [2023-09-01 14:16:12,882 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 271.0) internal successors, (9214), 34 states have internal predecessors, (9214), 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) [2023-09-01 14:16:12,882 INFO L175 Difference]: Start difference. First operand has 568 places, 1118 transitions, 28870 flow. Second operand 33 states and 2386 transitions. [2023-09-01 14:16:12,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 1195 transitions, 31734 flow [2023-09-01 14:16:14,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 568 places, 1195 transitions, 31344 flow, removed 24 selfloop flow, removed 22 redundant places. [2023-09-01 14:16:14,530 INFO L231 Difference]: Finished difference. Result has 572 places, 1119 transitions, 29439 flow [2023-09-01 14:16:14,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=28490, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=472, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=644, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=29439, PETRI_PLACES=572, PETRI_TRANSITIONS=1119} [2023-09-01 14:16:14,531 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 551 predicate places. [2023-09-01 14:16:14,531 INFO L495 AbstractCegarLoop]: Abstraction has has 572 places, 1119 transitions, 29439 flow [2023-09-01 14:16:14,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 69.55263157894737) internal successors, (2643), 38 states have internal predecessors, (2643), 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) [2023-09-01 14:16:14,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:16:14,532 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:16:14,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-09-01 14:16:14,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:16:14,732 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:16:14,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:16:14,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1439749739, now seen corresponding path program 38 times [2023-09-01 14:16:14,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:16:14,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790861714] [2023-09-01 14:16:14,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:16:14,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:16:14,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:16:16,033 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:16:16,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:16:16,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790861714] [2023-09-01 14:16:16,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790861714] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:16:16,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412350487] [2023-09-01 14:16:16,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:16:16,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:16:16,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:16:16,034 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:16:16,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-09-01 14:16:16,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:16:16,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:16:16,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 92 conjunts are in the unsatisfiable core [2023-09-01 14:16:16,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:16:16,382 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 15 treesize of output 11 [2023-09-01 14:16:16,460 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 15 treesize of output 11 [2023-09-01 14:16:16,572 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 6 treesize of output 5 [2023-09-01 14:16:16,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:16:16,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 14:16:17,271 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:16:17,271 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 25 treesize of output 7 [2023-09-01 14:16:17,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:16:17,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:16:19,699 INFO L321 Elim1Store]: treesize reduction 48, result has 64.7 percent of original size [2023-09-01 14:16:19,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 379 treesize of output 304 [2023-09-01 14:16:19,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 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 385 treesize of output 368 [2023-09-01 14:16:19,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 259 treesize of output 246 [2023-09-01 14:16:19,782 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:16:19,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 262 treesize of output 261 [2023-09-01 14:16:19,796 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 233 treesize of output 219 [2023-09-01 14:16:19,810 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 593 treesize of output 568 [2023-09-01 14:16:19,955 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:16:19,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 519 treesize of output 549 [2023-09-01 14:16:20,017 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:16:20,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 467 treesize of output 446 [2023-09-01 14:16:20,104 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:16:20,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 427 treesize of output 438 [2023-09-01 14:16:20,193 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:16:20,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 401 treesize of output 412 [2023-09-01 14:16:20,287 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:16:20,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 391 treesize of output 431 [2023-09-01 14:16:20,366 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:16:20,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 349 treesize of output 328 [2023-09-01 14:17:31,584 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:17:31,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412350487] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:17:31,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:17:31,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2023-09-01 14:17:31,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886798309] [2023-09-01 14:17:31,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:17:31,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-09-01 14:17:31,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:17:31,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-09-01 14:17:31,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1633, Unknown=5, NotChecked=0, Total=1892 [2023-09-01 14:17:35,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:17:37,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] Killed by 15