./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --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-3-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 c6847e0a77224cc67de11826c53270ee36a6eb5754e5add0bb0a49165dff2879 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 03:21:13,707 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 03:21:13,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 03:21:13,743 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 03:21:13,743 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 03:21:13,744 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 03:21:13,745 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 03:21:13,747 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 03:21:13,748 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 03:21:13,749 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 03:21:13,750 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 03:21:13,751 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 03:21:13,751 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 03:21:13,752 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 03:21:13,753 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 03:21:13,754 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 03:21:13,755 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 03:21:13,756 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 03:21:13,757 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 03:21:13,766 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 03:21:13,768 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 03:21:13,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 03:21:13,770 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 03:21:13,771 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 03:21:13,774 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 03:21:13,775 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 03:21:13,775 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 03:21:13,776 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 03:21:13,776 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 03:21:13,777 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 03:21:13,778 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 03:21:13,778 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 03:21:13,779 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 03:21:13,780 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 03:21:13,781 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 03:21:13,781 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 03:21:13,781 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 03:21:13,782 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 03:21:13,782 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 03:21:13,783 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 03:21:13,783 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 03:21:13,787 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 03:21:13,826 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 03:21:13,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 03:21:13,828 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 03:21:13,828 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 03:21:13,829 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 03:21:13,829 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 03:21:13,829 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 03:21:13,830 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 03:21:13,830 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 03:21:13,830 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 03:21:13,831 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 03:21:13,831 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 03:21:13,831 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 03:21:13,831 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 03:21:13,832 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 03:21:13,832 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 03:21:13,832 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 03:21:13,832 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 03:21:13,832 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 03:21:13,833 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 03:21:13,833 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 03:21:13,833 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 03:21:13,833 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 03:21:13,833 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 03:21:13,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 03:21:13,834 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 03:21:13,834 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 03:21:13,834 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 03:21:13,834 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 03:21:13,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 03:21:13,835 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 03:21:13,835 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 03:21:13,835 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 03:21:13,835 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 03:21:13,836 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 03:21:13,836 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6847e0a77224cc67de11826c53270ee36a6eb5754e5add0bb0a49165dff2879 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 03:21:14,145 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 03:21:14,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 03:21:14,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 03:21:14,176 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 03:21:14,177 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 03:21:14,178 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-08-31 03:21:15,255 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 03:21:15,447 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 03:21:15,447 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-08-31 03:21:15,459 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fa992c11/0c5194f0a7664ed1ab09a9f23e28f3f9/FLAG5a6a4aa05 [2023-08-31 03:21:15,470 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fa992c11/0c5194f0a7664ed1ab09a9f23e28f3f9 [2023-08-31 03:21:15,472 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 03:21:15,473 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 03:21:15,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 03:21:15,474 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 03:21:15,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 03:21:15,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 03:21:15" (1/1) ... [2023-08-31 03:21:15,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@893b0a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:21:15, skipping insertion in model container [2023-08-31 03:21:15,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 03:21:15" (1/1) ... [2023-08-31 03:21:15,484 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 03:21:15,510 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 03:21:15,717 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-3-nl.wvr.c[3615,3628] [2023-08-31 03:21:15,729 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 03:21:15,740 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 03:21:15,778 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-3-nl.wvr.c[3615,3628] [2023-08-31 03:21:15,788 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 03:21:15,797 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 03:21:15,803 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 03:21:15,809 INFO L208 MainTranslator]: Completed translation [2023-08-31 03:21:15,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:21:15 WrapperNode [2023-08-31 03:21:15,810 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 03:21:15,811 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 03:21:15,811 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 03:21:15,811 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 03:21:15,817 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:21:15" (1/1) ... [2023-08-31 03:21:15,837 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:21:15" (1/1) ... [2023-08-31 03:21:15,879 INFO L138 Inliner]: procedures = 26, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 265 [2023-08-31 03:21:15,881 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 03:21:15,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 03:21:15,883 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 03:21:15,883 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 03:21:15,891 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:21:15" (1/1) ... [2023-08-31 03:21:15,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:21:15" (1/1) ... [2023-08-31 03:21:15,902 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:21:15" (1/1) ... [2023-08-31 03:21:15,904 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:21:15" (1/1) ... [2023-08-31 03:21:15,910 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:21:15" (1/1) ... [2023-08-31 03:21:15,926 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:21:15" (1/1) ... [2023-08-31 03:21:15,931 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:21:15" (1/1) ... [2023-08-31 03:21:15,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:21:15" (1/1) ... [2023-08-31 03:21:15,939 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 03:21:15,941 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 03:21:15,941 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 03:21:15,942 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 03:21:15,942 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:21:15" (1/1) ... [2023-08-31 03:21:15,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 03:21:15,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:21:15,974 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) [2023-08-31 03:21:15,999 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 [2023-08-31 03:21:16,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 03:21:16,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 03:21:16,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 03:21:16,018 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 03:21:16,018 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 03:21:16,018 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 03:21:16,018 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 03:21:16,018 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 03:21:16,018 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-31 03:21:16,019 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-31 03:21:16,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 03:21:16,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 03:21:16,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 03:21:16,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 03:21:16,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 03:21:16,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 03:21:16,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 03:21:16,021 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 03:21:16,131 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 03:21:16,133 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 03:21:16,474 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 03:21:16,619 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 03:21:16,619 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-31 03:21:16,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 03:21:16 BoogieIcfgContainer [2023-08-31 03:21:16,621 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 03:21:16,623 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 03:21:16,623 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 03:21:16,626 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 03:21:16,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 03:21:15" (1/3) ... [2023-08-31 03:21:16,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29e4750b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 03:21:16, skipping insertion in model container [2023-08-31 03:21:16,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:21:15" (2/3) ... [2023-08-31 03:21:16,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29e4750b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 03:21:16, skipping insertion in model container [2023-08-31 03:21:16,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 03:21:16" (3/3) ... [2023-08-31 03:21:16,628 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-3-nl.wvr.c [2023-08-31 03:21:16,635 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 03:21:16,643 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 03:21:16,643 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 03:21:16,644 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 03:21:16,748 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 03:21:16,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 214 transitions, 452 flow [2023-08-31 03:21:16,864 INFO L130 PetriNetUnfolder]: 18/211 cut-off events. [2023-08-31 03:21:16,864 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 03:21:16,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224 conditions, 211 events. 18/211 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 128 event pairs, 0 based on Foata normal form. 0/192 useless extension candidates. Maximal degree in co-relation 173. Up to 3 conditions per place. [2023-08-31 03:21:16,874 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 214 transitions, 452 flow [2023-08-31 03:21:16,883 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 193 places, 201 transitions, 420 flow [2023-08-31 03:21:16,887 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 03:21:16,895 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 193 places, 201 transitions, 420 flow [2023-08-31 03:21:16,896 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 193 places, 201 transitions, 420 flow [2023-08-31 03:21:16,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 201 transitions, 420 flow [2023-08-31 03:21:16,943 INFO L130 PetriNetUnfolder]: 18/201 cut-off events. [2023-08-31 03:21:16,943 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 03:21:16,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 201 events. 18/201 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 127 event pairs, 0 based on Foata normal form. 0/183 useless extension candidates. Maximal degree in co-relation 173. Up to 3 conditions per place. [2023-08-31 03:21:16,946 INFO L119 LiptonReduction]: Number of co-enabled transitions 1880 [2023-08-31 03:21:24,166 INFO L134 LiptonReduction]: Checked pairs total: 2630 [2023-08-31 03:21:24,167 INFO L136 LiptonReduction]: Total number of compositions: 208 [2023-08-31 03:21:24,179 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 03:21:24,184 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;@64cee893, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 03:21:24,184 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-31 03:21:24,190 INFO L130 PetriNetUnfolder]: 6/27 cut-off events. [2023-08-31 03:21:24,191 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 03:21:24,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:21:24,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:21:24,192 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:21:24,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:21:24,196 INFO L85 PathProgramCache]: Analyzing trace with hash -2034446607, now seen corresponding path program 1 times [2023-08-31 03:21:24,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:21:24,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311675107] [2023-08-31 03:21:24,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:21:24,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:21:24,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:21:24,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:21:24,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:21:24,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311675107] [2023-08-31 03:21:24,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311675107] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:21:24,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:21:24,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 03:21:24,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50662808] [2023-08-31 03:21:24,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:21:24,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-31 03:21:24,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:21:24,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-31 03:21:24,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-31 03:21:24,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 422 [2023-08-31 03:21:24,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 74 flow. Second operand has 2 states, 2 states have (on average 199.0) internal successors, (398), 2 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:24,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:21:24,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 422 [2023-08-31 03:21:24,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:21:24,701 INFO L130 PetriNetUnfolder]: 323/460 cut-off events. [2023-08-31 03:21:24,701 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2023-08-31 03:21:24,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 972 conditions, 460 events. 323/460 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1341 event pairs, 190 based on Foata normal form. 0/327 useless extension candidates. Maximal degree in co-relation 765. Up to 460 conditions per place. [2023-08-31 03:21:24,709 INFO L137 encePairwiseOnDemand]: 421/422 looper letters, 26 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2023-08-31 03:21:24,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 124 flow [2023-08-31 03:21:24,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-31 03:21:24,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-31 03:21:24,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 405 transitions. [2023-08-31 03:21:24,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47985781990521326 [2023-08-31 03:21:24,731 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 405 transitions. [2023-08-31 03:21:24,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 405 transitions. [2023-08-31 03:21:24,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:21:24,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 405 transitions. [2023-08-31 03:21:24,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 202.5) internal successors, (405), 2 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:24,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 422.0) internal successors, (1266), 3 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:24,744 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 422.0) internal successors, (1266), 3 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:24,746 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 74 flow. Second operand 2 states and 405 transitions. [2023-08-31 03:21:24,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 124 flow [2023-08-31 03:21:24,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 112 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-31 03:21:24,750 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 60 flow [2023-08-31 03:21:24,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=60, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-08-31 03:21:24,754 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -5 predicate places. [2023-08-31 03:21:24,755 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 60 flow [2023-08-31 03:21:24,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 199.0) internal successors, (398), 2 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:24,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:21:24,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:21:24,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 03:21:24,756 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:21:24,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:21:24,757 INFO L85 PathProgramCache]: Analyzing trace with hash -192981207, now seen corresponding path program 1 times [2023-08-31 03:21:24,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:21:24,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237871624] [2023-08-31 03:21:24,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:21:24,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:21:24,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:21:25,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:21:25,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:21:25,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237871624] [2023-08-31 03:21:25,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237871624] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:21:25,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:21:25,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 03:21:25,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041307779] [2023-08-31 03:21:25,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:21:25,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 03:21:25,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:21:25,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 03:21:25,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 03:21:25,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 422 [2023-08-31 03:21:25,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 60 flow. Second operand has 4 states, 4 states have (on average 184.25) internal successors, (737), 4 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:25,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:21:25,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 422 [2023-08-31 03:21:25,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:21:25,247 INFO L130 PetriNetUnfolder]: 354/534 cut-off events. [2023-08-31 03:21:25,247 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-31 03:21:25,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1092 conditions, 534 events. 354/534 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1723 event pairs, 212 based on Foata normal form. 52/442 useless extension candidates. Maximal degree in co-relation 1089. Up to 460 conditions per place. [2023-08-31 03:21:25,250 INFO L137 encePairwiseOnDemand]: 415/422 looper letters, 25 selfloop transitions, 2 changer transitions 25/53 dead transitions. [2023-08-31 03:21:25,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 53 transitions, 222 flow [2023-08-31 03:21:25,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 03:21:25,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 03:21:25,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 953 transitions. [2023-08-31 03:21:25,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45165876777251185 [2023-08-31 03:21:25,253 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 953 transitions. [2023-08-31 03:21:25,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 953 transitions. [2023-08-31 03:21:25,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:21:25,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 953 transitions. [2023-08-31 03:21:25,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 190.6) internal successors, (953), 5 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:25,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 422.0) internal successors, (2532), 6 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:25,262 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 422.0) internal successors, (2532), 6 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:25,262 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 60 flow. Second operand 5 states and 953 transitions. [2023-08-31 03:21:25,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 53 transitions, 222 flow [2023-08-31 03:21:25,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 53 transitions, 222 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 03:21:25,264 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 86 flow [2023-08-31 03:21:25,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=86, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2023-08-31 03:21:25,265 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2023-08-31 03:21:25,265 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 86 flow [2023-08-31 03:21:25,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 184.25) internal successors, (737), 4 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:25,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:21:25,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:21:25,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 03:21:25,266 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:21:25,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:21:25,267 INFO L85 PathProgramCache]: Analyzing trace with hash -122480723, now seen corresponding path program 1 times [2023-08-31 03:21:25,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:21:25,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995494235] [2023-08-31 03:21:25,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:21:25,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:21:25,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:21:25,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:21:25,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:21:25,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995494235] [2023-08-31 03:21:25,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995494235] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:21:25,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:21:25,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 03:21:25,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527823245] [2023-08-31 03:21:25,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:21:25,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 03:21:25,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:21:25,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 03:21:25,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 03:21:25,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 422 [2023-08-31 03:21:25,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 184.5) internal successors, (738), 4 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:25,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:21:25,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 422 [2023-08-31 03:21:25,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:21:25,610 INFO L130 PetriNetUnfolder]: 452/664 cut-off events. [2023-08-31 03:21:25,610 INFO L131 PetriNetUnfolder]: For 443/443 co-relation queries the response was YES. [2023-08-31 03:21:25,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1897 conditions, 664 events. 452/664 cut-off events. For 443/443 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2352 event pairs, 280 based on Foata normal form. 46/539 useless extension candidates. Maximal degree in co-relation 1890. Up to 461 conditions per place. [2023-08-31 03:21:25,614 INFO L137 encePairwiseOnDemand]: 415/422 looper letters, 26 selfloop transitions, 2 changer transitions 14/43 dead transitions. [2023-08-31 03:21:25,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 43 transitions, 218 flow [2023-08-31 03:21:25,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:21:25,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:21:25,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 761 transitions. [2023-08-31 03:21:25,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45082938388625593 [2023-08-31 03:21:25,616 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 761 transitions. [2023-08-31 03:21:25,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 761 transitions. [2023-08-31 03:21:25,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:21:25,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 761 transitions. [2023-08-31 03:21:25,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 190.25) internal successors, (761), 4 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:25,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:25,623 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:25,623 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 86 flow. Second operand 4 states and 761 transitions. [2023-08-31 03:21:25,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 43 transitions, 218 flow [2023-08-31 03:21:25,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 43 transitions, 198 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-08-31 03:21:25,625 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 94 flow [2023-08-31 03:21:25,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-08-31 03:21:25,626 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-08-31 03:21:25,626 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 94 flow [2023-08-31 03:21:25,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 184.5) internal successors, (738), 4 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:25,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:21:25,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:21:25,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 03:21:25,628 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:21:25,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:21:25,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1322683899, now seen corresponding path program 1 times [2023-08-31 03:21:25,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:21:25,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177388510] [2023-08-31 03:21:25,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:21:25,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:21:25,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:21:26,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:21:26,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:21:26,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177388510] [2023-08-31 03:21:26,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177388510] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:21:26,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:21:26,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-31 03:21:26,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669978508] [2023-08-31 03:21:26,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:21:26,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-31 03:21:26,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:21:26,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-31 03:21:26,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-08-31 03:21:26,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 422 [2023-08-31 03:21:26,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 94 flow. Second operand has 9 states, 9 states have (on average 175.66666666666666) internal successors, (1581), 9 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:26,990 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:21:26,990 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 422 [2023-08-31 03:21:26,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:21:27,413 INFO L130 PetriNetUnfolder]: 594/862 cut-off events. [2023-08-31 03:21:27,413 INFO L131 PetriNetUnfolder]: For 150/150 co-relation queries the response was YES. [2023-08-31 03:21:27,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2259 conditions, 862 events. 594/862 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2894 event pairs, 13 based on Foata normal form. 1/652 useless extension candidates. Maximal degree in co-relation 2251. Up to 576 conditions per place. [2023-08-31 03:21:27,418 INFO L137 encePairwiseOnDemand]: 411/422 looper letters, 71 selfloop transitions, 28 changer transitions 3/102 dead transitions. [2023-08-31 03:21:27,419 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 102 transitions, 519 flow [2023-08-31 03:21:27,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 03:21:27,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 03:21:27,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1658 transitions. [2023-08-31 03:21:27,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365455502896261 [2023-08-31 03:21:27,423 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1658 transitions. [2023-08-31 03:21:27,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1658 transitions. [2023-08-31 03:21:27,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:21:27,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1658 transitions. [2023-08-31 03:21:27,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 184.22222222222223) internal successors, (1658), 9 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:27,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 422.0) internal successors, (4220), 10 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:27,435 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 422.0) internal successors, (4220), 10 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:27,435 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 94 flow. Second operand 9 states and 1658 transitions. [2023-08-31 03:21:27,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 102 transitions, 519 flow [2023-08-31 03:21:27,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 102 transitions, 515 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 03:21:27,438 INFO L231 Difference]: Finished difference. Result has 45 places, 55 transitions, 287 flow [2023-08-31 03:21:27,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=287, PETRI_PLACES=45, PETRI_TRANSITIONS=55} [2023-08-31 03:21:27,439 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 13 predicate places. [2023-08-31 03:21:27,440 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 55 transitions, 287 flow [2023-08-31 03:21:27,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 175.66666666666666) internal successors, (1581), 9 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:27,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:21:27,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:21:27,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 03:21:27,442 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:21:27,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:21:27,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1126960381, now seen corresponding path program 2 times [2023-08-31 03:21:27,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:21:27,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32378660] [2023-08-31 03:21:27,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:21:27,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:21:27,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:21:27,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:21:27,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:21:27,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32378660] [2023-08-31 03:21:27,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32378660] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:21:27,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:21:27,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 03:21:27,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482104085] [2023-08-31 03:21:27,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:21:27,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 03:21:27,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:21:27,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 03:21:27,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 03:21:27,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 422 [2023-08-31 03:21:27,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 55 transitions, 287 flow. Second operand has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:27,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:21:27,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 422 [2023-08-31 03:21:27,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:21:27,775 INFO L130 PetriNetUnfolder]: 485/716 cut-off events. [2023-08-31 03:21:27,776 INFO L131 PetriNetUnfolder]: For 453/466 co-relation queries the response was YES. [2023-08-31 03:21:27,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2447 conditions, 716 events. 485/716 cut-off events. For 453/466 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2231 event pairs, 107 based on Foata normal form. 27/569 useless extension candidates. Maximal degree in co-relation 2435. Up to 632 conditions per place. [2023-08-31 03:21:27,781 INFO L137 encePairwiseOnDemand]: 418/422 looper letters, 55 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2023-08-31 03:21:27,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 62 transitions, 421 flow [2023-08-31 03:21:27,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 03:21:27,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 03:21:27,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 593 transitions. [2023-08-31 03:21:27,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684044233807267 [2023-08-31 03:21:27,784 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 593 transitions. [2023-08-31 03:21:27,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 593 transitions. [2023-08-31 03:21:27,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:21:27,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 593 transitions. [2023-08-31 03:21:27,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:27,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:27,788 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:27,789 INFO L175 Difference]: Start difference. First operand has 45 places, 55 transitions, 287 flow. Second operand 3 states and 593 transitions. [2023-08-31 03:21:27,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 62 transitions, 421 flow [2023-08-31 03:21:27,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 62 transitions, 363 flow, removed 28 selfloop flow, removed 2 redundant places. [2023-08-31 03:21:27,794 INFO L231 Difference]: Finished difference. Result has 46 places, 53 transitions, 238 flow [2023-08-31 03:21:27,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=46, PETRI_TRANSITIONS=53} [2023-08-31 03:21:27,795 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 14 predicate places. [2023-08-31 03:21:27,795 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 53 transitions, 238 flow [2023-08-31 03:21:27,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:27,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:21:27,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:21:27,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 03:21:27,796 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:21:27,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:21:27,797 INFO L85 PathProgramCache]: Analyzing trace with hash 247356795, now seen corresponding path program 3 times [2023-08-31 03:21:27,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:21:27,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066624420] [2023-08-31 03:21:27,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:21:27,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:21:27,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:21:28,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:21:28,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:21:28,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066624420] [2023-08-31 03:21:28,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066624420] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:21:28,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:21:28,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-31 03:21:28,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228770988] [2023-08-31 03:21:28,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:21:28,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-31 03:21:28,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:21:28,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-31 03:21:28,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-08-31 03:21:28,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 422 [2023-08-31 03:21:28,726 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 53 transitions, 238 flow. Second operand has 9 states, 9 states have (on average 174.66666666666666) internal successors, (1572), 9 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:28,726 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:21:28,726 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 422 [2023-08-31 03:21:28,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:21:29,066 INFO L130 PetriNetUnfolder]: 604/893 cut-off events. [2023-08-31 03:21:29,066 INFO L131 PetriNetUnfolder]: For 559/559 co-relation queries the response was YES. [2023-08-31 03:21:29,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2910 conditions, 893 events. 604/893 cut-off events. For 559/559 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2922 event pairs, 123 based on Foata normal form. 1/692 useless extension candidates. Maximal degree in co-relation 2897. Up to 754 conditions per place. [2023-08-31 03:21:29,073 INFO L137 encePairwiseOnDemand]: 411/422 looper letters, 70 selfloop transitions, 26 changer transitions 3/99 dead transitions. [2023-08-31 03:21:29,073 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 99 transitions, 606 flow [2023-08-31 03:21:29,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 03:21:29,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 03:21:29,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1627 transitions. [2023-08-31 03:21:29,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4283833596629805 [2023-08-31 03:21:29,078 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1627 transitions. [2023-08-31 03:21:29,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1627 transitions. [2023-08-31 03:21:29,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:21:29,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1627 transitions. [2023-08-31 03:21:29,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 180.77777777777777) internal successors, (1627), 9 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:29,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 422.0) internal successors, (4220), 10 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:29,087 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 422.0) internal successors, (4220), 10 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:29,087 INFO L175 Difference]: Start difference. First operand has 46 places, 53 transitions, 238 flow. Second operand 9 states and 1627 transitions. [2023-08-31 03:21:29,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 99 transitions, 606 flow [2023-08-31 03:21:29,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 99 transitions, 577 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-08-31 03:21:29,092 INFO L231 Difference]: Finished difference. Result has 57 places, 71 transitions, 413 flow [2023-08-31 03:21:29,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=413, PETRI_PLACES=57, PETRI_TRANSITIONS=71} [2023-08-31 03:21:29,093 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 25 predicate places. [2023-08-31 03:21:29,093 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 71 transitions, 413 flow [2023-08-31 03:21:29,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 174.66666666666666) internal successors, (1572), 9 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:29,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:21:29,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:21:29,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 03:21:29,095 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:21:29,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:21:29,095 INFO L85 PathProgramCache]: Analyzing trace with hash 740987369, now seen corresponding path program 4 times [2023-08-31 03:21:29,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:21:29,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507977118] [2023-08-31 03:21:29,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:21:29,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:21:29,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:21:29,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:21:29,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:21:29,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507977118] [2023-08-31 03:21:29,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507977118] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:21:29,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:21:29,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 03:21:29,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590558529] [2023-08-31 03:21:29,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:21:29,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 03:21:29,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:21:29,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 03:21:29,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 03:21:29,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 422 [2023-08-31 03:21:29,239 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 71 transitions, 413 flow. Second operand has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:29,239 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:21:29,239 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 422 [2023-08-31 03:21:29,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:21:29,368 INFO L130 PetriNetUnfolder]: 532/822 cut-off events. [2023-08-31 03:21:29,369 INFO L131 PetriNetUnfolder]: For 759/768 co-relation queries the response was YES. [2023-08-31 03:21:29,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2790 conditions, 822 events. 532/822 cut-off events. For 759/768 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2946 event pairs, 156 based on Foata normal form. 63/725 useless extension candidates. Maximal degree in co-relation 2773. Up to 541 conditions per place. [2023-08-31 03:21:29,375 INFO L137 encePairwiseOnDemand]: 417/422 looper letters, 60 selfloop transitions, 7 changer transitions 0/69 dead transitions. [2023-08-31 03:21:29,375 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 69 transitions, 501 flow [2023-08-31 03:21:29,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 03:21:29,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 03:21:29,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 588 transitions. [2023-08-31 03:21:29,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46445497630331756 [2023-08-31 03:21:29,378 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 588 transitions. [2023-08-31 03:21:29,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 588 transitions. [2023-08-31 03:21:29,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:21:29,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 588 transitions. [2023-08-31 03:21:29,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:29,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:29,382 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:29,382 INFO L175 Difference]: Start difference. First operand has 57 places, 71 transitions, 413 flow. Second operand 3 states and 588 transitions. [2023-08-31 03:21:29,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 69 transitions, 501 flow [2023-08-31 03:21:29,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 69 transitions, 459 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-08-31 03:21:29,389 INFO L231 Difference]: Finished difference. Result has 54 places, 60 transitions, 324 flow [2023-08-31 03:21:29,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=54, PETRI_TRANSITIONS=60} [2023-08-31 03:21:29,389 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 22 predicate places. [2023-08-31 03:21:29,390 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 60 transitions, 324 flow [2023-08-31 03:21:29,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:29,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:21:29,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:21:29,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 03:21:29,391 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:21:29,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:21:29,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1391984997, now seen corresponding path program 5 times [2023-08-31 03:21:29,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:21:29,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732481269] [2023-08-31 03:21:29,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:21:29,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:21:29,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:21:30,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:21:30,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:21:30,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732481269] [2023-08-31 03:21:30,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732481269] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:21:30,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:21:30,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-31 03:21:30,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117158857] [2023-08-31 03:21:30,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:21:30,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-31 03:21:30,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:21:30,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-31 03:21:30,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-08-31 03:21:30,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 422 [2023-08-31 03:21:30,336 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 60 transitions, 324 flow. Second operand has 9 states, 9 states have (on average 175.66666666666666) internal successors, (1581), 9 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:30,336 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:21:30,336 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 422 [2023-08-31 03:21:30,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:21:30,709 INFO L130 PetriNetUnfolder]: 607/947 cut-off events. [2023-08-31 03:21:30,709 INFO L131 PetriNetUnfolder]: For 773/773 co-relation queries the response was YES. [2023-08-31 03:21:30,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3310 conditions, 947 events. 607/947 cut-off events. For 773/773 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3552 event pairs, 113 based on Foata normal form. 1/766 useless extension candidates. Maximal degree in co-relation 3294. Up to 719 conditions per place. [2023-08-31 03:21:30,717 INFO L137 encePairwiseOnDemand]: 411/422 looper letters, 83 selfloop transitions, 23 changer transitions 3/109 dead transitions. [2023-08-31 03:21:30,717 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 109 transitions, 717 flow [2023-08-31 03:21:30,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 03:21:30,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 03:21:30,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1639 transitions. [2023-08-31 03:21:30,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154291732490785 [2023-08-31 03:21:30,722 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1639 transitions. [2023-08-31 03:21:30,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1639 transitions. [2023-08-31 03:21:30,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:21:30,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1639 transitions. [2023-08-31 03:21:30,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 182.11111111111111) internal successors, (1639), 9 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:30,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 422.0) internal successors, (4220), 10 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:30,732 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 422.0) internal successors, (4220), 10 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:30,732 INFO L175 Difference]: Start difference. First operand has 54 places, 60 transitions, 324 flow. Second operand 9 states and 1639 transitions. [2023-08-31 03:21:30,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 109 transitions, 717 flow [2023-08-31 03:21:30,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 109 transitions, 704 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-31 03:21:30,738 INFO L231 Difference]: Finished difference. Result has 64 places, 69 transitions, 460 flow [2023-08-31 03:21:30,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=460, PETRI_PLACES=64, PETRI_TRANSITIONS=69} [2023-08-31 03:21:30,739 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 32 predicate places. [2023-08-31 03:21:30,739 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 69 transitions, 460 flow [2023-08-31 03:21:30,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 175.66666666666666) internal successors, (1581), 9 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:30,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:21:30,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:21:30,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 03:21:30,741 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:21:30,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:21:30,741 INFO L85 PathProgramCache]: Analyzing trace with hash 948876929, now seen corresponding path program 6 times [2023-08-31 03:21:30,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:21:30,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215036947] [2023-08-31 03:21:30,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:21:30,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:21:30,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:21:31,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:21:31,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:21:31,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215036947] [2023-08-31 03:21:31,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215036947] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:21:31,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:21:31,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-31 03:21:31,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235530109] [2023-08-31 03:21:31,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:21:31,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-31 03:21:31,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:21:31,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-31 03:21:31,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-08-31 03:21:31,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 422 [2023-08-31 03:21:31,555 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 69 transitions, 460 flow. Second operand has 9 states, 9 states have (on average 174.66666666666666) internal successors, (1572), 9 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:31,555 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:21:31,555 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 422 [2023-08-31 03:21:31,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:21:31,933 INFO L130 PetriNetUnfolder]: 616/971 cut-off events. [2023-08-31 03:21:31,933 INFO L131 PetriNetUnfolder]: For 1279/1279 co-relation queries the response was YES. [2023-08-31 03:21:31,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3656 conditions, 971 events. 616/971 cut-off events. For 1279/1279 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3710 event pairs, 163 based on Foata normal form. 1/800 useless extension candidates. Maximal degree in co-relation 3637. Up to 832 conditions per place. [2023-08-31 03:21:31,941 INFO L137 encePairwiseOnDemand]: 411/422 looper letters, 86 selfloop transitions, 19 changer transitions 3/108 dead transitions. [2023-08-31 03:21:31,941 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 108 transitions, 824 flow [2023-08-31 03:21:31,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 03:21:31,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 03:21:31,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1622 transitions. [2023-08-31 03:21:31,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42706687730384413 [2023-08-31 03:21:31,947 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1622 transitions. [2023-08-31 03:21:31,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1622 transitions. [2023-08-31 03:21:31,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:21:31,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1622 transitions. [2023-08-31 03:21:31,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 180.22222222222223) internal successors, (1622), 9 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:31,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 422.0) internal successors, (4220), 10 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:31,957 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 422.0) internal successors, (4220), 10 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:31,957 INFO L175 Difference]: Start difference. First operand has 64 places, 69 transitions, 460 flow. Second operand 9 states and 1622 transitions. [2023-08-31 03:21:31,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 108 transitions, 824 flow [2023-08-31 03:21:31,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 108 transitions, 755 flow, removed 15 selfloop flow, removed 5 redundant places. [2023-08-31 03:21:31,968 INFO L231 Difference]: Finished difference. Result has 71 places, 76 transitions, 532 flow [2023-08-31 03:21:31,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=532, PETRI_PLACES=71, PETRI_TRANSITIONS=76} [2023-08-31 03:21:31,969 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 39 predicate places. [2023-08-31 03:21:31,969 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 76 transitions, 532 flow [2023-08-31 03:21:31,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 174.66666666666666) internal successors, (1572), 9 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:31,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:21:31,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:21:31,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 03:21:31,971 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:21:31,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:21:31,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1017322832, now seen corresponding path program 1 times [2023-08-31 03:21:31,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:21:31,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761056839] [2023-08-31 03:21:31,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:21:31,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:21:32,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:21:32,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:21:32,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:21:32,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761056839] [2023-08-31 03:21:32,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761056839] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:21:32,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:21:32,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 03:21:32,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764279255] [2023-08-31 03:21:32,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:21:32,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 03:21:32,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:21:32,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 03:21:32,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 03:21:32,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 422 [2023-08-31 03:21:32,117 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 76 transitions, 532 flow. Second operand has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:32,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:21:32,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 422 [2023-08-31 03:21:32,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:21:32,316 INFO L130 PetriNetUnfolder]: 804/1266 cut-off events. [2023-08-31 03:21:32,317 INFO L131 PetriNetUnfolder]: For 2099/2107 co-relation queries the response was YES. [2023-08-31 03:21:32,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4864 conditions, 1266 events. 804/1266 cut-off events. For 2099/2107 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5315 event pairs, 219 based on Foata normal form. 20/1038 useless extension candidates. Maximal degree in co-relation 4841. Up to 576 conditions per place. [2023-08-31 03:21:32,326 INFO L137 encePairwiseOnDemand]: 417/422 looper letters, 63 selfloop transitions, 39 changer transitions 4/108 dead transitions. [2023-08-31 03:21:32,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 108 transitions, 904 flow [2023-08-31 03:21:32,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:21:32,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:21:32,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 800 transitions. [2023-08-31 03:21:32,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47393364928909953 [2023-08-31 03:21:32,329 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 800 transitions. [2023-08-31 03:21:32,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 800 transitions. [2023-08-31 03:21:32,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:21:32,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 800 transitions. [2023-08-31 03:21:32,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:32,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:32,334 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:32,335 INFO L175 Difference]: Start difference. First operand has 71 places, 76 transitions, 532 flow. Second operand 4 states and 800 transitions. [2023-08-31 03:21:32,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 108 transitions, 904 flow [2023-08-31 03:21:32,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 108 transitions, 842 flow, removed 19 selfloop flow, removed 4 redundant places. [2023-08-31 03:21:32,354 INFO L231 Difference]: Finished difference. Result has 72 places, 78 transitions, 640 flow [2023-08-31 03:21:32,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=640, PETRI_PLACES=72, PETRI_TRANSITIONS=78} [2023-08-31 03:21:32,356 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 40 predicate places. [2023-08-31 03:21:32,356 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 78 transitions, 640 flow [2023-08-31 03:21:32,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:32,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:21:32,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:21:32,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 03:21:32,369 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:21:32,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:21:32,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1082305135, now seen corresponding path program 1 times [2023-08-31 03:21:32,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:21:32,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793118359] [2023-08-31 03:21:32,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:21:32,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:21:32,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:21:32,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:21:32,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:21:32,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793118359] [2023-08-31 03:21:32,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793118359] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:21:32,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858344400] [2023-08-31 03:21:32,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:21:32,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:21:32,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:21:32,533 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) [2023-08-31 03:21:32,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 03:21:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:21:32,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 03:21:32,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:21:32,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:21:32,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:21:32,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:21:32,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858344400] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:21:32,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:21:32,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-31 03:21:32,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355030481] [2023-08-31 03:21:32,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:21:32,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 03:21:32,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:21:32,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 03:21:32,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-08-31 03:21:33,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 422 [2023-08-31 03:21:33,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 78 transitions, 640 flow. Second operand has 12 states, 12 states have (on average 176.16666666666666) internal successors, (2114), 12 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:33,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:21:33,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 422 [2023-08-31 03:21:33,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:21:33,421 INFO L130 PetriNetUnfolder]: 1246/1997 cut-off events. [2023-08-31 03:21:33,421 INFO L131 PetriNetUnfolder]: For 4938/4954 co-relation queries the response was YES. [2023-08-31 03:21:33,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8843 conditions, 1997 events. 1246/1997 cut-off events. For 4938/4954 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9188 event pairs, 582 based on Foata normal form. 80/1713 useless extension candidates. Maximal degree in co-relation 8818. Up to 1138 conditions per place. [2023-08-31 03:21:33,437 INFO L137 encePairwiseOnDemand]: 417/422 looper letters, 142 selfloop transitions, 7 changer transitions 5/156 dead transitions. [2023-08-31 03:21:33,437 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 156 transitions, 1568 flow [2023-08-31 03:21:33,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 03:21:33,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 03:21:33,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1099 transitions. [2023-08-31 03:21:33,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434044233807267 [2023-08-31 03:21:33,441 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1099 transitions. [2023-08-31 03:21:33,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1099 transitions. [2023-08-31 03:21:33,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:21:33,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1099 transitions. [2023-08-31 03:21:33,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:33,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:33,448 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:33,448 INFO L175 Difference]: Start difference. First operand has 72 places, 78 transitions, 640 flow. Second operand 6 states and 1099 transitions. [2023-08-31 03:21:33,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 156 transitions, 1568 flow [2023-08-31 03:21:33,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 156 transitions, 1530 flow, removed 16 selfloop flow, removed 1 redundant places. [2023-08-31 03:21:33,477 INFO L231 Difference]: Finished difference. Result has 79 places, 83 transitions, 704 flow [2023-08-31 03:21:33,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=704, PETRI_PLACES=79, PETRI_TRANSITIONS=83} [2023-08-31 03:21:33,478 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 47 predicate places. [2023-08-31 03:21:33,478 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 83 transitions, 704 flow [2023-08-31 03:21:33,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 176.16666666666666) internal successors, (2114), 12 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:33,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:21:33,479 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:21:33,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 03:21:33,686 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,SelfDestructingSolverStorable10 [2023-08-31 03:21:33,687 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:21:33,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:21:33,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1111418417, now seen corresponding path program 1 times [2023-08-31 03:21:33,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:21:33,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623997778] [2023-08-31 03:21:33,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:21:33,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:21:33,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:21:33,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:21:33,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:21:33,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623997778] [2023-08-31 03:21:33,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623997778] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:21:33,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204015672] [2023-08-31 03:21:33,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:21:33,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:21:33,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:21:33,833 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) [2023-08-31 03:21:33,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 03:21:33,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:21:33,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 03:21:33,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:21:34,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:21:34,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:21:34,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:21:34,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204015672] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:21:34,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:21:34,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 03:21:34,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019748870] [2023-08-31 03:21:34,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:21:34,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 03:21:34,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:21:34,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 03:21:34,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-08-31 03:21:34,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 422 [2023-08-31 03:21:34,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 83 transitions, 704 flow. Second operand has 12 states, 12 states have (on average 176.25) internal successors, (2115), 12 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:34,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:21:34,270 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 422 [2023-08-31 03:21:34,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:21:34,752 INFO L130 PetriNetUnfolder]: 1736/2875 cut-off events. [2023-08-31 03:21:34,752 INFO L131 PetriNetUnfolder]: For 7604/7636 co-relation queries the response was YES. [2023-08-31 03:21:34,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12104 conditions, 2875 events. 1736/2875 cut-off events. For 7604/7636 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 15170 event pairs, 907 based on Foata normal form. 108/2571 useless extension candidates. Maximal degree in co-relation 12076. Up to 1792 conditions per place. [2023-08-31 03:21:34,806 INFO L137 encePairwiseOnDemand]: 417/422 looper letters, 109 selfloop transitions, 6 changer transitions 23/140 dead transitions. [2023-08-31 03:21:34,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 140 transitions, 1384 flow [2023-08-31 03:21:34,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 03:21:34,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 03:21:34,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1099 transitions. [2023-08-31 03:21:34,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434044233807267 [2023-08-31 03:21:34,810 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1099 transitions. [2023-08-31 03:21:34,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1099 transitions. [2023-08-31 03:21:34,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:21:34,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1099 transitions. [2023-08-31 03:21:34,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:34,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:34,818 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:34,818 INFO L175 Difference]: Start difference. First operand has 79 places, 83 transitions, 704 flow. Second operand 6 states and 1099 transitions. [2023-08-31 03:21:34,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 140 transitions, 1384 flow [2023-08-31 03:21:34,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 140 transitions, 1332 flow, removed 21 selfloop flow, removed 3 redundant places. [2023-08-31 03:21:34,877 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 761 flow [2023-08-31 03:21:34,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=663, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=761, PETRI_PLACES=84, PETRI_TRANSITIONS=86} [2023-08-31 03:21:34,879 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 52 predicate places. [2023-08-31 03:21:34,879 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 761 flow [2023-08-31 03:21:34,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 176.25) internal successors, (2115), 12 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:34,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:21:34,880 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:21:34,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 03:21:35,088 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,SelfDestructingSolverStorable11 [2023-08-31 03:21:35,088 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:21:35,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:21:35,089 INFO L85 PathProgramCache]: Analyzing trace with hash 719392531, now seen corresponding path program 2 times [2023-08-31 03:21:35,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:21:35,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343772680] [2023-08-31 03:21:35,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:21:35,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:21:35,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:21:35,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:21:35,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:21:35,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343772680] [2023-08-31 03:21:35,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343772680] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:21:35,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64180758] [2023-08-31 03:21:35,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:21:35,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:21:35,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:21:35,994 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) [2023-08-31 03:21:35,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 03:21:36,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:21:36,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:21:36,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-31 03:21:36,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:21:36,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:21:36,427 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 [2023-08-31 03:21:36,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:21:36,517 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 [2023-08-31 03:21:36,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:21:36,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:21:36,815 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:21:36,816 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 167 treesize of output 151 [2023-08-31 03:21:36,826 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 64 treesize of output 58 [2023-08-31 03:21:36,838 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 58 treesize of output 46 [2023-08-31 03:21:37,088 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:21:37,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64180758] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:21:37,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:21:37,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 26 [2023-08-31 03:21:37,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230114004] [2023-08-31 03:21:37,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:21:37,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 03:21:37,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:21:37,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 03:21:37,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=582, Unknown=3, NotChecked=0, Total=702 [2023-08-31 03:21:38,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 422 [2023-08-31 03:21:38,203 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 761 flow. Second operand has 27 states, 27 states have (on average 148.25925925925927) internal successors, (4003), 27 states have internal predecessors, (4003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:38,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:21:38,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 422 [2023-08-31 03:21:38,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:21:41,177 INFO L130 PetriNetUnfolder]: 4086/6485 cut-off events. [2023-08-31 03:21:41,177 INFO L131 PetriNetUnfolder]: For 15273/15345 co-relation queries the response was YES. [2023-08-31 03:21:41,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25267 conditions, 6485 events. 4086/6485 cut-off events. For 15273/15345 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 37263 event pairs, 505 based on Foata normal form. 73/5398 useless extension candidates. Maximal degree in co-relation 25237. Up to 2119 conditions per place. [2023-08-31 03:21:41,216 INFO L137 encePairwiseOnDemand]: 410/422 looper letters, 341 selfloop transitions, 121 changer transitions 2/466 dead transitions. [2023-08-31 03:21:41,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 466 transitions, 3979 flow [2023-08-31 03:21:41,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-31 03:21:41,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-31 03:21:41,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 5132 transitions. [2023-08-31 03:21:41,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36851931638661495 [2023-08-31 03:21:41,229 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 5132 transitions. [2023-08-31 03:21:41,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 5132 transitions. [2023-08-31 03:21:41,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:21:41,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 5132 transitions. [2023-08-31 03:21:41,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 155.5151515151515) internal successors, (5132), 33 states have internal predecessors, (5132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:41,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 422.0) internal successors, (14348), 34 states have internal predecessors, (14348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:41,260 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 422.0) internal successors, (14348), 34 states have internal predecessors, (14348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:41,260 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 761 flow. Second operand 33 states and 5132 transitions. [2023-08-31 03:21:41,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 466 transitions, 3979 flow [2023-08-31 03:21:41,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 466 transitions, 3826 flow, removed 66 selfloop flow, removed 3 redundant places. [2023-08-31 03:21:41,399 INFO L231 Difference]: Finished difference. Result has 134 places, 195 transitions, 1983 flow [2023-08-31 03:21:41,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=704, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1983, PETRI_PLACES=134, PETRI_TRANSITIONS=195} [2023-08-31 03:21:41,400 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 102 predicate places. [2023-08-31 03:21:41,400 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 195 transitions, 1983 flow [2023-08-31 03:21:41,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 148.25925925925927) internal successors, (4003), 27 states have internal predecessors, (4003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:41,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:21:41,402 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:21:41,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-31 03:21:41,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:21:41,609 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:21:41,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:21:41,610 INFO L85 PathProgramCache]: Analyzing trace with hash -676808391, now seen corresponding path program 3 times [2023-08-31 03:21:41,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:21:41,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273957952] [2023-08-31 03:21:41,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:21:41,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:21:41,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:21:42,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:21:42,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:21:42,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273957952] [2023-08-31 03:21:42,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273957952] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:21:42,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942027416] [2023-08-31 03:21:42,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:21:42,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:21:42,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:21:42,813 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) [2023-08-31 03:21:42,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 03:21:43,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 03:21:43,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:21:43,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-31 03:21:43,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:21:43,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:21:43,137 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 [2023-08-31 03:21:43,175 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-31 03:21:43,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:21:43,220 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_473 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_473) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 0))) is different from false [2023-08-31 03:21:43,234 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:21:43,235 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 [2023-08-31 03:21:43,239 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 [2023-08-31 03:21:43,325 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 1 not checked. [2023-08-31 03:21:43,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942027416] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:21:43,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:21:43,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 20 [2023-08-31 03:21:43,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090947229] [2023-08-31 03:21:43,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:21:43,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 03:21:43,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:21:43,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 03:21:43,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=328, Unknown=1, NotChecked=36, Total=420 [2023-08-31 03:21:43,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 422 [2023-08-31 03:21:43,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 195 transitions, 1983 flow. Second operand has 21 states, 21 states have (on average 135.85714285714286) internal successors, (2853), 21 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:43,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:21:43,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 422 [2023-08-31 03:21:43,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:21:45,666 INFO L130 PetriNetUnfolder]: 5557/8726 cut-off events. [2023-08-31 03:21:45,667 INFO L131 PetriNetUnfolder]: For 62459/62539 co-relation queries the response was YES. [2023-08-31 03:21:45,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43984 conditions, 8726 events. 5557/8726 cut-off events. For 62459/62539 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 51935 event pairs, 1190 based on Foata normal form. 32/8276 useless extension candidates. Maximal degree in co-relation 43935. Up to 4321 conditions per place. [2023-08-31 03:21:45,729 INFO L137 encePairwiseOnDemand]: 413/422 looper letters, 204 selfloop transitions, 118 changer transitions 0/324 dead transitions. [2023-08-31 03:21:45,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 324 transitions, 3620 flow [2023-08-31 03:21:45,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 03:21:45,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 03:21:45,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1831 transitions. [2023-08-31 03:21:45,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3337586584032082 [2023-08-31 03:21:45,734 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1831 transitions. [2023-08-31 03:21:45,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1831 transitions. [2023-08-31 03:21:45,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:21:45,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1831 transitions. [2023-08-31 03:21:45,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 140.84615384615384) internal successors, (1831), 13 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:45,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 422.0) internal successors, (5908), 14 states have internal predecessors, (5908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:45,745 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 422.0) internal successors, (5908), 14 states have internal predecessors, (5908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:45,745 INFO L175 Difference]: Start difference. First operand has 134 places, 195 transitions, 1983 flow. Second operand 13 states and 1831 transitions. [2023-08-31 03:21:45,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 324 transitions, 3620 flow [2023-08-31 03:21:46,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 324 transitions, 3372 flow, removed 112 selfloop flow, removed 6 redundant places. [2023-08-31 03:21:46,115 INFO L231 Difference]: Finished difference. Result has 144 places, 224 transitions, 2427 flow [2023-08-31 03:21:46,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1795, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2427, PETRI_PLACES=144, PETRI_TRANSITIONS=224} [2023-08-31 03:21:46,116 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 112 predicate places. [2023-08-31 03:21:46,116 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 224 transitions, 2427 flow [2023-08-31 03:21:46,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 135.85714285714286) internal successors, (2853), 21 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:46,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:21:46,118 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:21:46,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 03:21:46,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:21:46,324 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:21:46,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:21:46,325 INFO L85 PathProgramCache]: Analyzing trace with hash -122393817, now seen corresponding path program 2 times [2023-08-31 03:21:46,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:21:46,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347941223] [2023-08-31 03:21:46,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:21:46,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:21:46,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:21:46,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 03:21:46,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:21:46,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347941223] [2023-08-31 03:21:46,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347941223] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:21:46,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:21:46,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 03:21:46,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039574206] [2023-08-31 03:21:46,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:21:46,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 03:21:46,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:21:46,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 03:21:46,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-31 03:21:46,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 422 [2023-08-31 03:21:46,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 224 transitions, 2427 flow. Second operand has 5 states, 5 states have (on average 190.0) internal successors, (950), 5 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:46,466 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:21:46,466 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 422 [2023-08-31 03:21:46,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:21:48,143 INFO L130 PetriNetUnfolder]: 6639/10416 cut-off events. [2023-08-31 03:21:48,143 INFO L131 PetriNetUnfolder]: For 87974/88078 co-relation queries the response was YES. [2023-08-31 03:21:48,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55064 conditions, 10416 events. 6639/10416 cut-off events. For 87974/88078 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 63517 event pairs, 1207 based on Foata normal form. 202/10028 useless extension candidates. Maximal degree in co-relation 55014. Up to 6858 conditions per place. [2023-08-31 03:21:48,233 INFO L137 encePairwiseOnDemand]: 418/422 looper letters, 195 selfloop transitions, 47 changer transitions 44/288 dead transitions. [2023-08-31 03:21:48,233 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 288 transitions, 3520 flow [2023-08-31 03:21:48,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:21:48,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:21:48,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 806 transitions. [2023-08-31 03:21:48,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4774881516587678 [2023-08-31 03:21:48,242 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 806 transitions. [2023-08-31 03:21:48,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 806 transitions. [2023-08-31 03:21:48,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:21:48,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 806 transitions. [2023-08-31 03:21:48,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 201.5) internal successors, (806), 4 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:48,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:48,250 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:48,250 INFO L175 Difference]: Start difference. First operand has 144 places, 224 transitions, 2427 flow. Second operand 4 states and 806 transitions. [2023-08-31 03:21:48,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 288 transitions, 3520 flow [2023-08-31 03:21:48,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 288 transitions, 3440 flow, removed 27 selfloop flow, removed 10 redundant places. [2023-08-31 03:21:48,749 INFO L231 Difference]: Finished difference. Result has 139 places, 185 transitions, 1903 flow [2023-08-31 03:21:48,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1996, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1903, PETRI_PLACES=139, PETRI_TRANSITIONS=185} [2023-08-31 03:21:48,750 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 107 predicate places. [2023-08-31 03:21:48,750 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 185 transitions, 1903 flow [2023-08-31 03:21:48,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 190.0) internal successors, (950), 5 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:48,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:21:48,750 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:21:48,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-31 03:21:48,751 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:21:48,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:21:48,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1898689555, now seen corresponding path program 4 times [2023-08-31 03:21:48,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:21:48,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850202995] [2023-08-31 03:21:48,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:21:48,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:21:48,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:21:49,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:21:49,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:21:49,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850202995] [2023-08-31 03:21:49,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850202995] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:21:49,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626663770] [2023-08-31 03:21:49,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:21:49,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:21:49,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:21:49,643 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) [2023-08-31 03:21:49,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 03:21:49,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:21:49,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:21:49,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-31 03:21:49,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:21:49,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:21:49,914 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 [2023-08-31 03:21:49,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:21:49,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:21:50,013 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_562 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_562) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 0))) is different from false [2023-08-31 03:21:50,029 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:21:50,029 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 [2023-08-31 03:21:50,040 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 [2023-08-31 03:21:50,107 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-31 03:21:50,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626663770] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 03:21:50,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 03:21:50,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 8] total 22 [2023-08-31 03:21:50,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714705998] [2023-08-31 03:21:50,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:21:50,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 03:21:50,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:21:50,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 03:21:50,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=397, Unknown=1, NotChecked=40, Total=506 [2023-08-31 03:21:50,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 422 [2023-08-31 03:21:50,110 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 185 transitions, 1903 flow. Second operand has 7 states, 7 states have (on average 162.42857142857142) internal successors, (1137), 7 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:50,111 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:21:50,111 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 422 [2023-08-31 03:21:50,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:21:51,661 INFO L130 PetriNetUnfolder]: 7644/11819 cut-off events. [2023-08-31 03:21:51,661 INFO L131 PetriNetUnfolder]: For 127557/127645 co-relation queries the response was YES. [2023-08-31 03:21:51,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68124 conditions, 11819 events. 7644/11819 cut-off events. For 127557/127645 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 71589 event pairs, 1903 based on Foata normal form. 76/11273 useless extension candidates. Maximal degree in co-relation 68077. Up to 6403 conditions per place. [2023-08-31 03:21:51,748 INFO L137 encePairwiseOnDemand]: 408/422 looper letters, 167 selfloop transitions, 104 changer transitions 0/273 dead transitions. [2023-08-31 03:21:51,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 273 transitions, 3308 flow [2023-08-31 03:21:51,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 03:21:51,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 03:21:51,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1181 transitions. [2023-08-31 03:21:51,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3997968855788761 [2023-08-31 03:21:51,752 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1181 transitions. [2023-08-31 03:21:51,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1181 transitions. [2023-08-31 03:21:51,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:21:51,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1181 transitions. [2023-08-31 03:21:51,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 168.71428571428572) internal successors, (1181), 7 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:51,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 422.0) internal successors, (3376), 8 states have internal predecessors, (3376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:51,758 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 422.0) internal successors, (3376), 8 states have internal predecessors, (3376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:51,758 INFO L175 Difference]: Start difference. First operand has 139 places, 185 transitions, 1903 flow. Second operand 7 states and 1181 transitions. [2023-08-31 03:21:51,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 273 transitions, 3308 flow [2023-08-31 03:21:52,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 273 transitions, 3162 flow, removed 73 selfloop flow, removed 5 redundant places. [2023-08-31 03:21:52,445 INFO L231 Difference]: Finished difference. Result has 126 places, 224 transitions, 2706 flow [2023-08-31 03:21:52,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1831, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2706, PETRI_PLACES=126, PETRI_TRANSITIONS=224} [2023-08-31 03:21:52,446 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 94 predicate places. [2023-08-31 03:21:52,446 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 224 transitions, 2706 flow [2023-08-31 03:21:52,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 162.42857142857142) internal successors, (1137), 7 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:52,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:21:52,447 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:21:52,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-31 03:21:52,655 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,SelfDestructingSolverStorable15 [2023-08-31 03:21:52,655 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:21:52,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:21:52,656 INFO L85 PathProgramCache]: Analyzing trace with hash 2146947131, now seen corresponding path program 5 times [2023-08-31 03:21:52,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:21:52,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964508682] [2023-08-31 03:21:52,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:21:52,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:21:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:21:54,302 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:21:54,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:21:54,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964508682] [2023-08-31 03:21:54,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964508682] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:21:54,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11840035] [2023-08-31 03:21:54,303 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:21:54,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:21:54,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:21:54,305 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) [2023-08-31 03:21:54,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 03:21:54,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 03:21:54,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:21:54,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-31 03:21:54,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:21:54,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:21:54,656 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 [2023-08-31 03:21:54,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:21:54,714 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 [2023-08-31 03:21:54,760 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 03:21:54,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:21:54,811 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_624 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_624) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 0))) is different from false [2023-08-31 03:21:54,882 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:21:54,883 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 167 treesize of output 151 [2023-08-31 03:21:54,891 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 64 treesize of output 58 [2023-08-31 03:21:54,895 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 58 treesize of output 46 [2023-08-31 03:21:55,064 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-31 03:21:55,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11840035] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:21:55,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:21:55,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 28 [2023-08-31 03:21:55,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129187266] [2023-08-31 03:21:55,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:21:55,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-31 03:21:55,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:21:55,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-31 03:21:55,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=655, Unknown=1, NotChecked=52, Total=812 [2023-08-31 03:21:55,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 422 [2023-08-31 03:21:55,176 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 224 transitions, 2706 flow. Second operand has 29 states, 29 states have (on average 128.20689655172413) internal successors, (3718), 29 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:55,177 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:21:55,177 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 422 [2023-08-31 03:21:55,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:21:58,478 INFO L130 PetriNetUnfolder]: 8959/13906 cut-off events. [2023-08-31 03:21:58,478 INFO L131 PetriNetUnfolder]: For 151689/151689 co-relation queries the response was YES. [2023-08-31 03:21:58,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83573 conditions, 13906 events. 8959/13906 cut-off events. For 151689/151689 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 87807 event pairs, 902 based on Foata normal form. 140/13364 useless extension candidates. Maximal degree in co-relation 83527. Up to 5422 conditions per place. [2023-08-31 03:21:58,556 INFO L137 encePairwiseOnDemand]: 412/422 looper letters, 265 selfloop transitions, 238 changer transitions 2/505 dead transitions. [2023-08-31 03:21:58,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 505 transitions, 6880 flow [2023-08-31 03:21:58,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-31 03:21:58,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-31 03:21:58,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3333 transitions. [2023-08-31 03:21:58,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3159241706161137 [2023-08-31 03:21:58,572 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3333 transitions. [2023-08-31 03:21:58,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3333 transitions. [2023-08-31 03:21:58,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:21:58,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3333 transitions. [2023-08-31 03:21:58,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 133.32) internal successors, (3333), 25 states have internal predecessors, (3333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:58,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 422.0) internal successors, (10972), 26 states have internal predecessors, (10972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:58,594 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 422.0) internal successors, (10972), 26 states have internal predecessors, (10972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:58,595 INFO L175 Difference]: Start difference. First operand has 126 places, 224 transitions, 2706 flow. Second operand 25 states and 3333 transitions. [2023-08-31 03:21:58,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 505 transitions, 6880 flow [2023-08-31 03:21:59,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 505 transitions, 6459 flow, removed 79 selfloop flow, removed 5 redundant places. [2023-08-31 03:21:59,268 INFO L231 Difference]: Finished difference. Result has 145 places, 321 transitions, 4142 flow [2023-08-31 03:21:59,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2439, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4142, PETRI_PLACES=145, PETRI_TRANSITIONS=321} [2023-08-31 03:21:59,268 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 113 predicate places. [2023-08-31 03:21:59,269 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 321 transitions, 4142 flow [2023-08-31 03:21:59,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 128.20689655172413) internal successors, (3718), 29 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:59,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:21:59,270 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:21:59,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 03:21:59,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-31 03:21:59,476 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:21:59,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:21:59,477 INFO L85 PathProgramCache]: Analyzing trace with hash 591879251, now seen corresponding path program 1 times [2023-08-31 03:21:59,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:21:59,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191044329] [2023-08-31 03:21:59,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:21:59,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:21:59,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:21:59,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 03:21:59,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:21:59,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191044329] [2023-08-31 03:21:59,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191044329] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:21:59,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129531518] [2023-08-31 03:21:59,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:21:59,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:21:59,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:21:59,948 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) [2023-08-31 03:21:59,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 03:22:00,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:22:00,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-31 03:22:00,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:22:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-31 03:22:00,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:22:00,235 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 03:22:00,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2023-08-31 03:22:00,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-31 03:22:00,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129531518] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:22:00,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:22:00,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 3, 3] total 10 [2023-08-31 03:22:00,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128626921] [2023-08-31 03:22:00,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:22:00,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 03:22:00,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:22:00,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 03:22:00,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-08-31 03:22:00,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 422 [2023-08-31 03:22:00,601 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 321 transitions, 4142 flow. Second operand has 11 states, 11 states have (on average 170.63636363636363) internal successors, (1877), 11 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) [2023-08-31 03:22:00,601 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:22:00,601 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 422 [2023-08-31 03:22:00,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:22:03,210 INFO L130 PetriNetUnfolder]: 12725/18944 cut-off events. [2023-08-31 03:22:03,210 INFO L131 PetriNetUnfolder]: For 204604/204718 co-relation queries the response was YES. [2023-08-31 03:22:03,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120179 conditions, 18944 events. 12725/18944 cut-off events. For 204604/204718 co-relation queries the response was YES. Maximal size of possible extension queue 849. Compared 118273 event pairs, 3446 based on Foata normal form. 0/18502 useless extension candidates. Maximal degree in co-relation 120134. Up to 6583 conditions per place. [2023-08-31 03:22:03,335 INFO L137 encePairwiseOnDemand]: 413/422 looper letters, 721 selfloop transitions, 51 changer transitions 0/776 dead transitions. [2023-08-31 03:22:03,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 776 transitions, 11494 flow [2023-08-31 03:22:03,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 03:22:03,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 03:22:03,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1756 transitions. [2023-08-31 03:22:03,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4161137440758294 [2023-08-31 03:22:03,338 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1756 transitions. [2023-08-31 03:22:03,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1756 transitions. [2023-08-31 03:22:03,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:22:03,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1756 transitions. [2023-08-31 03:22:03,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 175.6) internal successors, (1756), 10 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:03,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 422.0) internal successors, (4642), 11 states have internal predecessors, (4642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:03,346 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 422.0) internal successors, (4642), 11 states have internal predecessors, (4642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:03,346 INFO L175 Difference]: Start difference. First operand has 145 places, 321 transitions, 4142 flow. Second operand 10 states and 1756 transitions. [2023-08-31 03:22:03,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 776 transitions, 11494 flow [2023-08-31 03:22:04,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 776 transitions, 11132 flow, removed 147 selfloop flow, removed 9 redundant places. [2023-08-31 03:22:04,286 INFO L231 Difference]: Finished difference. Result has 148 places, 355 transitions, 4612 flow [2023-08-31 03:22:04,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=3968, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4612, PETRI_PLACES=148, PETRI_TRANSITIONS=355} [2023-08-31 03:22:04,286 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 116 predicate places. [2023-08-31 03:22:04,287 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 355 transitions, 4612 flow [2023-08-31 03:22:04,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 170.63636363636363) internal successors, (1877), 11 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) [2023-08-31 03:22:04,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:22:04,287 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:22:04,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 03:22:04,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:22:04,488 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:22:04,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:22:04,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1826093481, now seen corresponding path program 2 times [2023-08-31 03:22:04,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:22:04,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636122388] [2023-08-31 03:22:04,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:22:04,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:22:04,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:22:05,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 03:22:05,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:22:05,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636122388] [2023-08-31 03:22:05,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636122388] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:22:05,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256223627] [2023-08-31 03:22:05,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:22:05,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:22:05,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:22:05,037 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) [2023-08-31 03:22:05,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 03:22:05,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:22:05,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:22:05,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 63 conjunts are in the unsatisfiable core [2023-08-31 03:22:05,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:22:06,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:22:06,112 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-31 03:22:06,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 36 [2023-08-31 03:22:06,124 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 7 treesize of output 3 [2023-08-31 03:22:06,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:22:06,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:22:06,645 INFO L321 Elim1Store]: treesize reduction 19, result has 79.6 percent of original size [2023-08-31 03:22:06,645 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 106 [2023-08-31 03:22:06,657 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 [2023-08-31 03:22:07,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:22:07,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256223627] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:22:07,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:22:07,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 14] total 34 [2023-08-31 03:22:07,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046572689] [2023-08-31 03:22:07,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:22:07,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-31 03:22:07,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:22:07,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-31 03:22:07,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2023-08-31 03:22:09,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 422 [2023-08-31 03:22:09,333 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 355 transitions, 4612 flow. Second operand has 35 states, 35 states have (on average 150.14285714285714) internal successors, (5255), 35 states have internal predecessors, (5255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:09,333 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:22:09,334 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 422 [2023-08-31 03:22:09,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:22:27,678 INFO L130 PetriNetUnfolder]: 33492/50240 cut-off events. [2023-08-31 03:22:27,679 INFO L131 PetriNetUnfolder]: For 548708/548808 co-relation queries the response was YES. [2023-08-31 03:22:27,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318100 conditions, 50240 events. 33492/50240 cut-off events. For 548708/548808 co-relation queries the response was YES. Maximal size of possible extension queue 1924. Compared 357984 event pairs, 3346 based on Foata normal form. 994/51222 useless extension candidates. Maximal degree in co-relation 318052. Up to 13786 conditions per place. [2023-08-31 03:22:28,198 INFO L137 encePairwiseOnDemand]: 408/422 looper letters, 1592 selfloop transitions, 1354 changer transitions 2/2952 dead transitions. [2023-08-31 03:22:28,199 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 2952 transitions, 41515 flow [2023-08-31 03:22:28,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2023-08-31 03:22:28,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2023-08-31 03:22:28,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 15569 transitions. [2023-08-31 03:22:28,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3726602518071712 [2023-08-31 03:22:28,222 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 15569 transitions. [2023-08-31 03:22:28,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 15569 transitions. [2023-08-31 03:22:28,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:22:28,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 15569 transitions. [2023-08-31 03:22:28,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 157.26262626262627) internal successors, (15569), 99 states have internal predecessors, (15569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:28,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 422.0) internal successors, (42200), 100 states have internal predecessors, (42200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:28,297 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 422.0) internal successors, (42200), 100 states have internal predecessors, (42200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:28,297 INFO L175 Difference]: Start difference. First operand has 148 places, 355 transitions, 4612 flow. Second operand 99 states and 15569 transitions. [2023-08-31 03:22:28,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 2952 transitions, 41515 flow [2023-08-31 03:22:32,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 2952 transitions, 41189 flow, removed 135 selfloop flow, removed 3 redundant places. [2023-08-31 03:22:32,052 INFO L231 Difference]: Finished difference. Result has 292 places, 1839 transitions, 30171 flow [2023-08-31 03:22:32,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=4537, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=30171, PETRI_PLACES=292, PETRI_TRANSITIONS=1839} [2023-08-31 03:22:32,053 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 260 predicate places. [2023-08-31 03:22:32,053 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 1839 transitions, 30171 flow [2023-08-31 03:22:32,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 150.14285714285714) internal successors, (5255), 35 states have internal predecessors, (5255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:32,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:22:32,054 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:22:32,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-31 03:22:32,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:22:32,254 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:22:32,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:22:32,255 INFO L85 PathProgramCache]: Analyzing trace with hash 42047138, now seen corresponding path program 1 times [2023-08-31 03:22:32,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:22:32,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994656826] [2023-08-31 03:22:32,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:22:32,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:22:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:22:34,783 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:22:34,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:22:34,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994656826] [2023-08-31 03:22:34,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994656826] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:22:34,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877190367] [2023-08-31 03:22:34,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:22:34,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:22:34,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:22:34,786 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) [2023-08-31 03:22:34,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 03:22:34,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:22:34,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 66 conjunts are in the unsatisfiable core [2023-08-31 03:22:34,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:22:35,638 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 03:22:35,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:22:38,100 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (* c_~q2_back~0 4)) (.cse5 (select (select |c_#memory_int| c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) (let ((.cse0 (forall ((~q2~0.base Int) (~q2~0.offset Int)) (not (= (select (select |c_#memory_int| ~q2~0.base) (+ ~q2~0.offset .cse4)) .cse5)))) (.cse2 (mod c_~x~0 4294967296)) (.cse1 (* c_~C~0 2))) (and (or .cse0 (= (mod (+ .cse1 c_~z~0) 4294967296) .cse2)) (forall ((~q2~0.base Int) (~q2~0.offset Int)) (let ((.cse3 (select |c_#memory_int| ~q2~0.base))) (or (= c_~N~0 (+ c_~t~0 (select .cse3 (+ ~q2~0.offset (* c_~q2_front~0 4))))) (not (= (select .cse3 (+ ~q2~0.offset .cse4)) .cse5))))) (or .cse0 (= .cse2 (mod (+ c_~y~0 .cse1) 4294967296)))))) is different from false [2023-08-31 03:22:40,169 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (* c_~q2_back~0 4)) (.cse5 (select (select |c_#memory_int| c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) (let ((.cse0 (forall ((~q2~0.base Int) (~q2~0.offset Int)) (not (= (select (select |c_#memory_int| ~q2~0.base) (+ ~q2~0.offset .cse4)) .cse5)))) (.cse2 (mod c_~x~0 4294967296)) (.cse1 (* c_~C~0 2))) (and (or .cse0 (= (mod (+ .cse1 c_~z~0) 4294967296) .cse2)) (forall ((~q2~0.base Int) (~q2~0.offset Int)) (let ((.cse3 (select |c_#memory_int| ~q2~0.base))) (or (= c_~N~0 (select .cse3 (+ ~q2~0.offset (* c_~q2_front~0 4)))) (not (= (select .cse3 (+ ~q2~0.offset .cse4)) .cse5))))) (or .cse0 (= .cse2 (mod (+ c_~y~0 .cse1) 4294967296)))))) is different from false [2023-08-31 03:23:10,377 WARN L222 SmtUtils]: Spent 30.10s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:23:10,511 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:23:10,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 118 treesize of output 293 [2023-08-31 03:23:17,945 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 1 not checked. [2023-08-31 03:23:17,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877190367] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:23:17,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:23:17,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 10] total 37 [2023-08-31 03:23:17,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138700050] [2023-08-31 03:23:17,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:23:17,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-31 03:23:17,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:23:17,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-31 03:23:17,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1237, Unknown=2, NotChecked=142, Total=1482 [2023-08-31 03:23:18,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 422 [2023-08-31 03:23:18,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 1839 transitions, 30171 flow. Second operand has 39 states, 39 states have (on average 114.23076923076923) internal successors, (4455), 39 states have internal predecessors, (4455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:18,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:23:18,131 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 422 [2023-08-31 03:23:18,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:23:27,056 WARN L222 SmtUtils]: Spent 6.06s on a formula simplification. DAG size of input: 80 DAG size of output: 43 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:23:36,638 WARN L222 SmtUtils]: Spent 6.07s on a formula simplification. DAG size of input: 83 DAG size of output: 45 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:23:55,940 INFO L130 PetriNetUnfolder]: 34227/51532 cut-off events. [2023-08-31 03:23:55,941 INFO L131 PetriNetUnfolder]: For 2469881/2469881 co-relation queries the response was YES. [2023-08-31 03:23:56,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 459528 conditions, 51532 events. 34227/51532 cut-off events. For 2469881/2469881 co-relation queries the response was YES. Maximal size of possible extension queue 1861. Compared 367605 event pairs, 9708 based on Foata normal form. 4/51536 useless extension candidates. Maximal degree in co-relation 459430. Up to 49396 conditions per place. [2023-08-31 03:23:56,932 INFO L137 encePairwiseOnDemand]: 405/422 looper letters, 1835 selfloop transitions, 214 changer transitions 4/2053 dead transitions. [2023-08-31 03:23:56,932 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 2053 transitions, 36706 flow [2023-08-31 03:23:56,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-31 03:23:56,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-31 03:23:56,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3324 transitions. [2023-08-31 03:23:56,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2813134732566012 [2023-08-31 03:23:56,937 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3324 transitions. [2023-08-31 03:23:56,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3324 transitions. [2023-08-31 03:23:56,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:23:56,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3324 transitions. [2023-08-31 03:23:56,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 118.71428571428571) internal successors, (3324), 28 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:56,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 422.0) internal successors, (12238), 29 states have internal predecessors, (12238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:56,951 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 422.0) internal successors, (12238), 29 states have internal predecessors, (12238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:56,951 INFO L175 Difference]: Start difference. First operand has 292 places, 1839 transitions, 30171 flow. Second operand 28 states and 3324 transitions. [2023-08-31 03:23:56,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 2053 transitions, 36706 flow [2023-08-31 03:24:45,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 2053 transitions, 33486 flow, removed 1504 selfloop flow, removed 15 redundant places. [2023-08-31 03:24:45,792 INFO L231 Difference]: Finished difference. Result has 316 places, 1938 transitions, 29317 flow [2023-08-31 03:24:45,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=27137, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1839, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=29317, PETRI_PLACES=316, PETRI_TRANSITIONS=1938} [2023-08-31 03:24:45,794 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 284 predicate places. [2023-08-31 03:24:45,794 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 1938 transitions, 29317 flow [2023-08-31 03:24:45,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 114.23076923076923) internal successors, (4455), 39 states have internal predecessors, (4455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:24:45,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:24:45,795 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:24:45,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-31 03:24:45,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:24:45,995 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:24:45,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:24:45,996 INFO L85 PathProgramCache]: Analyzing trace with hash -209186642, now seen corresponding path program 2 times [2023-08-31 03:24:45,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:24:45,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934181270] [2023-08-31 03:24:45,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:24:45,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:24:46,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:24:48,239 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:24:48,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:24:48,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934181270] [2023-08-31 03:24:48,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934181270] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:24:48,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006275267] [2023-08-31 03:24:48,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:24:48,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:24:48,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:24:48,241 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) [2023-08-31 03:24:48,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 03:24:48,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:24:48,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:24:48,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 87 conjunts are in the unsatisfiable core [2023-08-31 03:24:48,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:24:49,758 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:24:49,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:24:50,648 INFO L321 Elim1Store]: treesize reduction 22, result has 89.8 percent of original size [2023-08-31 03:24:50,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 118 treesize of output 246 [2023-08-31 03:24:51,912 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:24:51,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006275267] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:24:51,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:24:51,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 48 [2023-08-31 03:24:51,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064156286] [2023-08-31 03:24:51,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:24:51,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-08-31 03:24:51,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:24:51,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-08-31 03:24:51,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=2190, Unknown=0, NotChecked=0, Total=2450 [2023-08-31 03:24:55,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:25:00,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 422 [2023-08-31 03:25:00,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 1938 transitions, 29317 flow. Second operand has 50 states, 50 states have (on average 136.8) internal successors, (6840), 50 states have internal predecessors, (6840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:25:00,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:25:00,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 422 [2023-08-31 03:25:00,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:25:32,812 INFO L130 PetriNetUnfolder]: 36035/54426 cut-off events. [2023-08-31 03:25:32,812 INFO L131 PetriNetUnfolder]: For 2572159/2572159 co-relation queries the response was YES. [2023-08-31 03:25:33,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 466521 conditions, 54426 events. 36035/54426 cut-off events. For 2572159/2572159 co-relation queries the response was YES. Maximal size of possible extension queue 2116. Compared 395886 event pairs, 4909 based on Foata normal form. 9/53429 useless extension candidates. Maximal degree in co-relation 466416. Up to 25303 conditions per place. [2023-08-31 03:25:33,882 INFO L137 encePairwiseOnDemand]: 405/422 looper letters, 1258 selfloop transitions, 1232 changer transitions 14/2504 dead transitions. [2023-08-31 03:25:33,882 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 2504 transitions, 41186 flow [2023-08-31 03:25:33,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-31 03:25:33,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-31 03:25:33,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 7434 transitions. [2023-08-31 03:25:33,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387714181553044 [2023-08-31 03:25:33,892 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 7434 transitions. [2023-08-31 03:25:33,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 7434 transitions. [2023-08-31 03:25:33,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:25:33,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 7434 transitions. [2023-08-31 03:25:33,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 142.96153846153845) internal successors, (7434), 52 states have internal predecessors, (7434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:25:33,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 422.0) internal successors, (22366), 53 states have internal predecessors, (22366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:25:33,919 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 422.0) internal successors, (22366), 53 states have internal predecessors, (22366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:25:33,919 INFO L175 Difference]: Start difference. First operand has 316 places, 1938 transitions, 29317 flow. Second operand 52 states and 7434 transitions. [2023-08-31 03:25:33,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 2504 transitions, 41186 flow [2023-08-31 03:26:12,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 2504 transitions, 40954 flow, removed 98 selfloop flow, removed 9 redundant places. [2023-08-31 03:26:12,437 INFO L231 Difference]: Finished difference. Result has 377 places, 2185 transitions, 37981 flow [2023-08-31 03:26:12,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=29087, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1938, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1027, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=850, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=37981, PETRI_PLACES=377, PETRI_TRANSITIONS=2185} [2023-08-31 03:26:12,439 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 345 predicate places. [2023-08-31 03:26:12,439 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 2185 transitions, 37981 flow [2023-08-31 03:26:12,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 136.8) internal successors, (6840), 50 states have internal predecessors, (6840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:26:12,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:26:12,440 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:26:12,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-31 03:26:12,640 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,SelfDestructingSolverStorable20 [2023-08-31 03:26:12,640 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:26:12,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:26:12,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1868070854, now seen corresponding path program 3 times [2023-08-31 03:26:12,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:26:12,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305860636] [2023-08-31 03:26:12,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:26:12,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:26:12,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:26:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:26:14,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:26:14,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305860636] [2023-08-31 03:26:14,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305860636] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:26:14,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566170474] [2023-08-31 03:26:14,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:26:14,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:26:14,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:26:14,999 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) [2023-08-31 03:26:15,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 03:26:15,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 03:26:15,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:26:15,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 87 conjunts are in the unsatisfiable core [2023-08-31 03:26:15,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:26:16,338 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:26:16,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:26:17,297 INFO L321 Elim1Store]: treesize reduction 22, result has 89.8 percent of original size [2023-08-31 03:26:17,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 118 treesize of output 246 [2023-08-31 03:26:18,836 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:26:18,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566170474] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:26:18,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:26:18,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 48 [2023-08-31 03:26:18,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412969564] [2023-08-31 03:26:18,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:26:18,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-08-31 03:26:18,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:26:18,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-08-31 03:26:18,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=2192, Unknown=0, NotChecked=0, Total=2450 [2023-08-31 03:26:26,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 422 [2023-08-31 03:26:26,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 2185 transitions, 37981 flow. Second operand has 50 states, 50 states have (on average 136.8) internal successors, (6840), 50 states have internal predecessors, (6840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:26:26,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:26:26,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 422 [2023-08-31 03:26:26,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:27:05,695 INFO L130 PetriNetUnfolder]: 37942/57472 cut-off events. [2023-08-31 03:27:05,695 INFO L131 PetriNetUnfolder]: For 2943149/2943149 co-relation queries the response was YES. [2023-08-31 03:27:06,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 544149 conditions, 57472 events. 37942/57472 cut-off events. For 2943149/2943149 co-relation queries the response was YES. Maximal size of possible extension queue 2314. Compared 424486 event pairs, 5018 based on Foata normal form. 8/56516 useless extension candidates. Maximal degree in co-relation 544025. Up to 25826 conditions per place. [2023-08-31 03:27:07,074 INFO L137 encePairwiseOnDemand]: 405/422 looper letters, 1327 selfloop transitions, 1393 changer transitions 12/2732 dead transitions. [2023-08-31 03:27:07,074 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 2732 transitions, 50040 flow [2023-08-31 03:27:07,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-31 03:27:07,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-31 03:27:07,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 7467 transitions. [2023-08-31 03:27:07,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3402752460809333 [2023-08-31 03:27:07,082 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 7467 transitions. [2023-08-31 03:27:07,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 7467 transitions. [2023-08-31 03:27:07,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:27:07,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 7467 transitions. [2023-08-31 03:27:07,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 143.59615384615384) internal successors, (7467), 52 states have internal predecessors, (7467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:27:07,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 422.0) internal successors, (22366), 53 states have internal predecessors, (22366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:27:07,112 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 422.0) internal successors, (22366), 53 states have internal predecessors, (22366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:27:07,113 INFO L175 Difference]: Start difference. First operand has 377 places, 2185 transitions, 37981 flow. Second operand 52 states and 7467 transitions. [2023-08-31 03:27:07,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 2732 transitions, 50040 flow [2023-08-31 03:28:34,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 2732 transitions, 48928 flow, removed 498 selfloop flow, removed 16 redundant places. [2023-08-31 03:28:34,505 INFO L231 Difference]: Finished difference. Result has 428 places, 2392 transitions, 43521 flow [2023-08-31 03:28:34,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=36945, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=916, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=43521, PETRI_PLACES=428, PETRI_TRANSITIONS=2392} [2023-08-31 03:28:34,508 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 396 predicate places. [2023-08-31 03:28:34,508 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 2392 transitions, 43521 flow [2023-08-31 03:28:34,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 136.8) internal successors, (6840), 50 states have internal predecessors, (6840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:28:34,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:28:34,509 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:28:34,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-31 03:28:34,715 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,SelfDestructingSolverStorable21 [2023-08-31 03:28:34,716 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:28:34,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:28:34,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1059594603, now seen corresponding path program 3 times [2023-08-31 03:28:34,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:28:34,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500264127] [2023-08-31 03:28:34,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:28:34,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:28:34,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:28:36,776 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:28:36,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:28:36,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500264127] [2023-08-31 03:28:36,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500264127] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:28:36,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140078520] [2023-08-31 03:28:36,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:28:36,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:28:36,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:28:36,778 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) [2023-08-31 03:28:36,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-31 03:28:36,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 03:28:36,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:28:36,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-31 03:28:36,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:28:37,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:28:37,087 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 [2023-08-31 03:28:37,113 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 03:28:37,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:28:37,158 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:28:37,158 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 44 treesize of output 36 [2023-08-31 03:28:37,160 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 [2023-08-31 03:28:37,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 03:28:37,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140078520] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:28:37,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:28:37,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6, 6] total 25 [2023-08-31 03:28:37,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3857567] [2023-08-31 03:28:37,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:28:37,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-31 03:28:37,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:28:37,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-31 03:28:37,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=578, Unknown=5, NotChecked=0, Total=650 [2023-08-31 03:28:37,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 422 [2023-08-31 03:28:37,834 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 2392 transitions, 43521 flow. Second operand has 26 states, 26 states have (on average 117.61538461538461) internal successors, (3058), 26 states have internal predecessors, (3058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:28:37,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:28:37,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 422 [2023-08-31 03:28:37,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:29:11,514 INFO L130 PetriNetUnfolder]: 45569/67870 cut-off events. [2023-08-31 03:29:11,514 INFO L131 PetriNetUnfolder]: For 3273273/3273273 co-relation queries the response was YES. [2023-08-31 03:29:13,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 689130 conditions, 67870 events. 45569/67870 cut-off events. For 3273273/3273273 co-relation queries the response was YES. Maximal size of possible extension queue 2877. Compared 500782 event pairs, 7386 based on Foata normal form. 604/67814 useless extension candidates. Maximal degree in co-relation 688991. Up to 22605 conditions per place. [2023-08-31 03:29:13,516 INFO L137 encePairwiseOnDemand]: 407/422 looper letters, 2869 selfloop transitions, 377 changer transitions 0/3246 dead transitions. [2023-08-31 03:29:13,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 3246 transitions, 66218 flow [2023-08-31 03:29:13,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-31 03:29:13,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-31 03:29:13,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2450 transitions. [2023-08-31 03:29:13,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2902843601895735 [2023-08-31 03:29:13,520 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2450 transitions. [2023-08-31 03:29:13,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2450 transitions. [2023-08-31 03:29:13,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:29:13,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2450 transitions. [2023-08-31 03:29:13,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 122.5) internal successors, (2450), 20 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:29:13,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 422.0) internal successors, (8862), 21 states have internal predecessors, (8862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:29:13,531 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 422.0) internal successors, (8862), 21 states have internal predecessors, (8862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:29:13,531 INFO L175 Difference]: Start difference. First operand has 428 places, 2392 transitions, 43521 flow. Second operand 20 states and 2450 transitions. [2023-08-31 03:29:13,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 3246 transitions, 66218 flow [2023-08-31 03:30:12,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 3246 transitions, 63784 flow, removed 1017 selfloop flow, removed 38 redundant places. [2023-08-31 03:30:12,707 INFO L231 Difference]: Finished difference. Result has 397 places, 2174 transitions, 38785 flow [2023-08-31 03:30:12,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=35765, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2059, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1767, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=38785, PETRI_PLACES=397, PETRI_TRANSITIONS=2174} [2023-08-31 03:30:12,709 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 365 predicate places. [2023-08-31 03:30:12,710 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 2174 transitions, 38785 flow [2023-08-31 03:30:12,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 117.61538461538461) internal successors, (3058), 26 states have internal predecessors, (3058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:30:12,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:30:12,711 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:30:12,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-31 03:30:12,919 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,SelfDestructingSolverStorable22 [2023-08-31 03:30:12,920 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:30:12,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:30:12,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1816562324, now seen corresponding path program 4 times [2023-08-31 03:30:12,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:30:12,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870501499] [2023-08-31 03:30:12,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:30:12,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:30:12,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:30:14,842 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:30:14,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:30:14,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870501499] [2023-08-31 03:30:14,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870501499] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:30:14,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117470759] [2023-08-31 03:30:14,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:30:14,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:30:14,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:30:14,845 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) [2023-08-31 03:30:14,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-31 03:30:15,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:30:15,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:30:15,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-31 03:30:15,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:30:15,614 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 03:30:15,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:30:48,191 WARN L222 SmtUtils]: Spent 30.05s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:31:18,494 WARN L222 SmtUtils]: Spent 30.17s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:31:18,599 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:31:18,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 129 treesize of output 296 [2023-08-31 03:31:22,092 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 03:31:22,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117470759] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:31:22,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:31:22,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 10] total 36 [2023-08-31 03:31:22,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018410192] [2023-08-31 03:31:22,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:31:22,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-31 03:31:22,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:31:22,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-31 03:31:22,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1307, Unknown=0, NotChecked=0, Total=1406 [2023-08-31 03:31:24,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:31:26,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:31:29,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:31:31,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:31:33,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:31:35,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:31:37,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:31:39,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:31:42,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:31:44,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:31:46,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:31:49,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:31:51,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:31:53,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:31:55,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:31:57,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:31:57,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 422 [2023-08-31 03:31:57,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 2174 transitions, 38785 flow. Second operand has 38 states, 38 states have (on average 130.26315789473685) internal successors, (4950), 38 states have internal predecessors, (4950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:31:57,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:31:57,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 422 [2023-08-31 03:31:57,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:32:32,735 INFO L130 PetriNetUnfolder]: 46884/70146 cut-off events. [2023-08-31 03:32:32,735 INFO L131 PetriNetUnfolder]: For 2616750/2616750 co-relation queries the response was YES. [2023-08-31 03:32:34,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684873 conditions, 70146 events. 46884/70146 cut-off events. For 2616750/2616750 co-relation queries the response was YES. Maximal size of possible extension queue 2872. Compared 520101 event pairs, 11476 based on Foata normal form. 5/69387 useless extension candidates. Maximal degree in co-relation 684741. Up to 59492 conditions per place. [2023-08-31 03:32:34,643 INFO L137 encePairwiseOnDemand]: 405/422 looper letters, 1873 selfloop transitions, 677 changer transitions 33/2583 dead transitions. [2023-08-31 03:32:34,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 2583 transitions, 49423 flow [2023-08-31 03:32:34,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-31 03:32:34,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-31 03:32:34,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5025 transitions. [2023-08-31 03:32:34,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3218265659023953 [2023-08-31 03:32:34,648 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5025 transitions. [2023-08-31 03:32:34,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5025 transitions. [2023-08-31 03:32:34,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:32:34,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5025 transitions. [2023-08-31 03:32:34,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 135.8108108108108) internal successors, (5025), 37 states have internal predecessors, (5025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:32:34,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 422.0) internal successors, (16036), 38 states have internal predecessors, (16036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:32:34,669 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 422.0) internal successors, (16036), 38 states have internal predecessors, (16036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:32:34,669 INFO L175 Difference]: Start difference. First operand has 397 places, 2174 transitions, 38785 flow. Second operand 37 states and 5025 transitions. [2023-08-31 03:32:34,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 2583 transitions, 49423 flow [2023-08-31 03:33:19,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 2583 transitions, 48867 flow, removed 126 selfloop flow, removed 9 redundant places. [2023-08-31 03:33:19,261 INFO L231 Difference]: Finished difference. Result has 434 places, 2381 transitions, 44197 flow [2023-08-31 03:33:19,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=38393, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=485, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=44197, PETRI_PLACES=434, PETRI_TRANSITIONS=2381} [2023-08-31 03:33:19,263 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 402 predicate places. [2023-08-31 03:33:19,263 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 2381 transitions, 44197 flow [2023-08-31 03:33:19,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 130.26315789473685) internal successors, (4950), 38 states have internal predecessors, (4950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:33:19,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:33:19,264 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:33:19,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-31 03:33:19,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-31 03:33:19,464 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:33:19,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:33:19,465 INFO L85 PathProgramCache]: Analyzing trace with hash 629112284, now seen corresponding path program 5 times [2023-08-31 03:33:19,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:33:19,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681666456] [2023-08-31 03:33:19,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:33:19,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:33:19,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:33:21,555 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:21,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:33:21,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681666456] [2023-08-31 03:33:21,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681666456] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:33:21,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928006658] [2023-08-31 03:33:21,555 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:33:21,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:33:21,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:33:21,556 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) [2023-08-31 03:33:21,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-31 03:33:21,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:33:21,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:33:21,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 82 conjunts are in the unsatisfiable core [2023-08-31 03:33:21,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:33:22,703 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:33:22,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:33:23,572 INFO L321 Elim1Store]: treesize reduction 22, result has 89.8 percent of original size [2023-08-31 03:33:23,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 129 treesize of output 249 [2023-08-31 03:33:25,173 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:33:25,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928006658] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:33:25,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:33:25,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 44 [2023-08-31 03:33:25,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383273533] [2023-08-31 03:33:25,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:33:25,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-08-31 03:33:25,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:33:25,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-08-31 03:33:25,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1856, Unknown=0, NotChecked=0, Total=2070 [2023-08-31 03:33:31,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 422 [2023-08-31 03:33:31,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 2381 transitions, 44197 flow. Second operand has 46 states, 46 states have (on average 135.91304347826087) internal successors, (6252), 46 states have internal predecessors, (6252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:33:31,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:33:31,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 422 [2023-08-31 03:33:31,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:34:16,783 WARN L222 SmtUtils]: Spent 21.69s on a formula simplification. DAG size of input: 123 DAG size of output: 74 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Killed by 15