./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread-complex/safestack_relacy.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) 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/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread-complex/safestack_relacy.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1d61eb304445c3cb39dfadfa4748d680ea5f0f4958f8bc176e8bc3c77c47e674 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 21:06:33,638 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 21:06:33,649 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 21:06:33,689 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 21:06:33,689 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 21:06:33,692 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 21:06:33,694 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 21:06:33,697 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 21:06:33,699 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 21:06:33,703 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 21:06:33,704 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 21:06:33,707 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 21:06:33,707 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 21:06:33,709 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 21:06:33,710 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 21:06:33,715 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 21:06:33,715 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 21:06:33,717 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 21:06:33,718 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 21:06:33,723 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 21:06:33,724 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 21:06:33,725 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 21:06:33,726 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 21:06:33,727 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 21:06:33,733 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 21:06:33,733 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 21:06:33,733 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 21:06:33,735 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 21:06:33,735 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 21:06:33,736 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 21:06:33,736 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 21:06:33,738 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 21:06:33,739 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 21:06:33,740 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 21:06:33,741 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 21:06:33,741 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 21:06:33,741 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 21:06:33,742 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 21:06:33,742 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 21:06:33,742 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 21:06:33,743 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 21:06:33,744 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 21:06:33,777 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 21:06:33,777 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 21:06:33,778 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 21:06:33,778 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 21:06:33,779 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 21:06:33,779 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 21:06:33,780 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 21:06:33,780 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 21:06:33,780 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 21:06:33,780 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 21:06:33,781 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 21:06:33,781 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 21:06:33,781 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 21:06:33,781 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 21:06:33,782 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 21:06:33,782 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 21:06:33,782 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 21:06:33,782 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 21:06:33,782 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 21:06:33,782 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 21:06:33,783 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 21:06:33,783 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 21:06:33,783 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 21:06:33,783 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 21:06:33,783 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 21:06:33,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:06:33,784 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 21:06:33,784 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 21:06:33,784 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 21:06:33,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 21:06:33,784 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 21:06:33,785 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 21:06:33,785 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 21:06:33,785 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 21:06:33,785 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d61eb304445c3cb39dfadfa4748d680ea5f0f4958f8bc176e8bc3c77c47e674 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 21:06:34,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 21:06:34,117 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 21:06:34,120 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 21:06:34,121 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 21:06:34,121 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 21:06:34,122 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-complex/safestack_relacy.i [2023-08-29 21:06:35,350 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 21:06:35,675 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 21:06:35,679 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/safestack_relacy.i [2023-08-29 21:06:35,702 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/391c682de/09a8f7e989c6478585571a758f9b4b58/FLAGc589bb99d [2023-08-29 21:06:35,722 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/391c682de/09a8f7e989c6478585571a758f9b4b58 [2023-08-29 21:06:35,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 21:06:35,725 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 21:06:35,728 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 21:06:35,728 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 21:06:35,731 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 21:06:35,731 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:06:35" (1/1) ... [2023-08-29 21:06:35,732 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7beb4362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:35, skipping insertion in model container [2023-08-29 21:06:35,732 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:06:35" (1/1) ... [2023-08-29 21:06:35,738 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 21:06:35,810 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 21:06:36,414 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/safestack_relacy.i[78860,78873] [2023-08-29 21:06:36,420 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:06:36,429 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 21:06:36,479 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/safestack_relacy.i[78860,78873] [2023-08-29 21:06:36,482 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:06:36,598 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 21:06:36,599 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 21:06:36,605 INFO L208 MainTranslator]: Completed translation [2023-08-29 21:06:36,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:36 WrapperNode [2023-08-29 21:06:36,605 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 21:06:36,606 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 21:06:36,606 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 21:06:36,606 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 21:06:36,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:36" (1/1) ... [2023-08-29 21:06:36,648 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:36" (1/1) ... [2023-08-29 21:06:36,681 INFO L138 Inliner]: procedures = 481, calls = 74, calls flagged for inlining = 19, calls inlined = 19, statements flattened = 283 [2023-08-29 21:06:36,681 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 21:06:36,682 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 21:06:36,682 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 21:06:36,682 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 21:06:36,690 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:36" (1/1) ... [2023-08-29 21:06:36,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:36" (1/1) ... [2023-08-29 21:06:36,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:36" (1/1) ... [2023-08-29 21:06:36,695 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:36" (1/1) ... [2023-08-29 21:06:36,708 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:36" (1/1) ... [2023-08-29 21:06:36,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:36" (1/1) ... [2023-08-29 21:06:36,715 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:36" (1/1) ... [2023-08-29 21:06:36,717 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:36" (1/1) ... [2023-08-29 21:06:36,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 21:06:36,729 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 21:06:36,729 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 21:06:36,730 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 21:06:36,730 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:36" (1/1) ... [2023-08-29 21:06:36,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:06:36,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:06:36,770 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) [2023-08-29 21:06:36,792 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 [2023-08-29 21:06:36,808 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-29 21:06:36,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 21:06:36,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-29 21:06:36,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 21:06:36,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 21:06:36,810 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2023-08-29 21:06:36,810 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2023-08-29 21:06:36,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 21:06:36,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 21:06:36,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 21:06:36,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 21:06:36,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 21:06:36,812 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 21:06:37,160 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 21:06:37,161 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 21:06:37,555 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 21:06:37,668 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 21:06:37,669 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-29 21:06:37,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:06:37 BoogieIcfgContainer [2023-08-29 21:06:37,672 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 21:06:37,674 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 21:06:37,674 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 21:06:37,677 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 21:06:37,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 09:06:35" (1/3) ... [2023-08-29 21:06:37,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16699188 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:06:37, skipping insertion in model container [2023-08-29 21:06:37,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:36" (2/3) ... [2023-08-29 21:06:37,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16699188 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:06:37, skipping insertion in model container [2023-08-29 21:06:37,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:06:37" (3/3) ... [2023-08-29 21:06:37,681 INFO L112 eAbstractionObserver]: Analyzing ICFG safestack_relacy.i [2023-08-29 21:06:37,695 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 21:06:37,696 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 68 error locations. [2023-08-29 21:06:37,696 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 21:06:37,845 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-29 21:06:37,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 304 places, 318 transitions, 644 flow [2023-08-29 21:06:38,027 INFO L130 PetriNetUnfolder]: 19/339 cut-off events. [2023-08-29 21:06:38,028 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:06:38,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 339 events. 19/339 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 826 event pairs, 0 based on Foata normal form. 0/244 useless extension candidates. Maximal degree in co-relation 243. Up to 4 conditions per place. [2023-08-29 21:06:38,037 INFO L82 GeneralOperation]: Start removeDead. Operand has 304 places, 318 transitions, 644 flow [2023-08-29 21:06:38,047 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 304 places, 318 transitions, 644 flow [2023-08-29 21:06:38,050 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:06:38,061 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 304 places, 318 transitions, 644 flow [2023-08-29 21:06:38,065 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 304 places, 318 transitions, 644 flow [2023-08-29 21:06:38,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 304 places, 318 transitions, 644 flow [2023-08-29 21:06:38,113 INFO L130 PetriNetUnfolder]: 19/339 cut-off events. [2023-08-29 21:06:38,113 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:06:38,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 339 events. 19/339 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 826 event pairs, 0 based on Foata normal form. 0/244 useless extension candidates. Maximal degree in co-relation 243. Up to 4 conditions per place. [2023-08-29 21:06:38,124 INFO L119 LiptonReduction]: Number of co-enabled transitions 11718 [2023-08-29 21:06:51,496 INFO L134 LiptonReduction]: Checked pairs total: 22994 [2023-08-29 21:06:51,497 INFO L136 LiptonReduction]: Total number of compositions: 423 [2023-08-29 21:06:51,508 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:06:51,514 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@5c73b167, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:06:51,514 INFO L358 AbstractCegarLoop]: Starting to check reachability of 123 error locations. [2023-08-29 21:06:51,515 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-29 21:06:51,516 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:06:51,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:06:51,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 21:06:51,517 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:06:51,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:06:51,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1527, now seen corresponding path program 1 times [2023-08-29 21:06:51,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:06:51,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319711571] [2023-08-29 21:06:51,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:06:51,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:06:51,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:06:51,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:06:51,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:06:51,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319711571] [2023-08-29 21:06:51,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319711571] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:06:51,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:06:51,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 21:06:51,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14489774] [2023-08-29 21:06:51,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:06:51,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 21:06:51,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:06:51,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 21:06:51,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 21:06:51,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 741 [2023-08-29 21:06:51,778 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 114 transitions, 236 flow. Second operand has 2 states, 2 states have (on average 272.5) internal successors, (545), 2 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:51,778 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:06:51,778 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 741 [2023-08-29 21:06:51,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:06:52,022 INFO L130 PetriNetUnfolder]: 569/1200 cut-off events. [2023-08-29 21:06:52,022 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:06:52,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2346 conditions, 1200 events. 569/1200 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 6694 event pairs, 495 based on Foata normal form. 12/494 useless extension candidates. Maximal degree in co-relation 2296. Up to 1139 conditions per place. [2023-08-29 21:06:52,030 INFO L137 encePairwiseOnDemand]: 706/741 looper letters, 72 selfloop transitions, 0 changer transitions 0/78 dead transitions. [2023-08-29 21:06:52,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 78 transitions, 308 flow [2023-08-29 21:06:52,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 21:06:52,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 21:06:52,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 651 transitions. [2023-08-29 21:06:52,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392712550607287 [2023-08-29 21:06:52,049 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 651 transitions. [2023-08-29 21:06:52,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 651 transitions. [2023-08-29 21:06:52,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:06:52,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 651 transitions. [2023-08-29 21:06:52,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 325.5) internal successors, (651), 2 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:52,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 741.0) internal successors, (2223), 3 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:52,067 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 741.0) internal successors, (2223), 3 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:52,068 INFO L175 Difference]: Start difference. First operand has 106 places, 114 transitions, 236 flow. Second operand 2 states and 651 transitions. [2023-08-29 21:06:52,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 78 transitions, 308 flow [2023-08-29 21:06:52,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 78 transitions, 308 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:06:52,075 INFO L231 Difference]: Finished difference. Result has 74 places, 78 transitions, 164 flow [2023-08-29 21:06:52,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=164, PETRI_PLACES=74, PETRI_TRANSITIONS=78} [2023-08-29 21:06:52,080 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -32 predicate places. [2023-08-29 21:06:52,081 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 78 transitions, 164 flow [2023-08-29 21:06:52,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 272.5) internal successors, (545), 2 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:52,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:06:52,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:06:52,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 21:06:52,083 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:06:52,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:06:52,092 INFO L85 PathProgramCache]: Analyzing trace with hash 49054, now seen corresponding path program 1 times [2023-08-29 21:06:52,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:06:52,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115424848] [2023-08-29 21:06:52,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:06:52,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:06:52,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:06:52,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:06:52,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:06:52,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115424848] [2023-08-29 21:06:52,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115424848] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:06:52,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:06:52,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:06:52,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056685907] [2023-08-29 21:06:52,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:06:52,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:06:52,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:06:52,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:06:52,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:06:52,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 741 [2023-08-29 21:06:52,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 78 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 267.6666666666667) internal successors, (803), 3 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:52,319 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:06:52,319 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 741 [2023-08-29 21:06:52,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:06:52,559 INFO L130 PetriNetUnfolder]: 569/1203 cut-off events. [2023-08-29 21:06:52,559 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:06:52,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2353 conditions, 1203 events. 569/1203 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 6715 event pairs, 495 based on Foata normal form. 0/483 useless extension candidates. Maximal degree in co-relation 2349. Up to 1139 conditions per place. [2023-08-29 21:06:52,565 INFO L137 encePairwiseOnDemand]: 736/741 looper letters, 73 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2023-08-29 21:06:52,565 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 81 transitions, 320 flow [2023-08-29 21:06:52,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:06:52,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:06:52,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 879 transitions. [2023-08-29 21:06:52,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39541160593792174 [2023-08-29 21:06:52,568 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 879 transitions. [2023-08-29 21:06:52,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 879 transitions. [2023-08-29 21:06:52,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:06:52,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 879 transitions. [2023-08-29 21:06:52,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 293.0) internal successors, (879), 3 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:52,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 741.0) internal successors, (2964), 4 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:52,576 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 741.0) internal successors, (2964), 4 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:52,576 INFO L175 Difference]: Start difference. First operand has 74 places, 78 transitions, 164 flow. Second operand 3 states and 879 transitions. [2023-08-29 21:06:52,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 81 transitions, 320 flow [2023-08-29 21:06:52,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 81 transitions, 320 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:06:52,579 INFO L231 Difference]: Finished difference. Result has 77 places, 79 transitions, 180 flow [2023-08-29 21:06:52,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=77, PETRI_TRANSITIONS=79} [2023-08-29 21:06:52,580 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -29 predicate places. [2023-08-29 21:06:52,580 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 79 transitions, 180 flow [2023-08-29 21:06:52,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 267.6666666666667) internal successors, (803), 3 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:52,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:06:52,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:06:52,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 21:06:52,581 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:06:52,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:06:52,582 INFO L85 PathProgramCache]: Analyzing trace with hash 49023, now seen corresponding path program 1 times [2023-08-29 21:06:52,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:06:52,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392175116] [2023-08-29 21:06:52,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:06:52,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:06:52,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:06:52,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:06:52,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:06:52,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392175116] [2023-08-29 21:06:52,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392175116] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:06:52,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:06:52,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:06:52,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974570707] [2023-08-29 21:06:52,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:06:52,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:06:52,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:06:52,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:06:52,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:06:52,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 741 [2023-08-29 21:06:52,765 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 79 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 267.6666666666667) internal successors, (803), 3 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:52,766 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:06:52,766 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 741 [2023-08-29 21:06:52,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:06:53,170 INFO L130 PetriNetUnfolder]: 1069/2224 cut-off events. [2023-08-29 21:06:53,172 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 21:06:53,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4368 conditions, 2224 events. 1069/2224 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 13269 event pairs, 429 based on Foata normal form. 12/949 useless extension candidates. Maximal degree in co-relation 4362. Up to 1163 conditions per place. [2023-08-29 21:06:53,182 INFO L137 encePairwiseOnDemand]: 728/741 looper letters, 125 selfloop transitions, 4 changer transitions 0/134 dead transitions. [2023-08-29 21:06:53,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 134 transitions, 549 flow [2023-08-29 21:06:53,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:06:53,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:06:53,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 938 transitions. [2023-08-29 21:06:53,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219523166891588 [2023-08-29 21:06:53,186 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 938 transitions. [2023-08-29 21:06:53,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 938 transitions. [2023-08-29 21:06:53,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:06:53,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 938 transitions. [2023-08-29 21:06:53,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 312.6666666666667) internal successors, (938), 3 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:53,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 741.0) internal successors, (2964), 4 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:53,193 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 741.0) internal successors, (2964), 4 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:53,193 INFO L175 Difference]: Start difference. First operand has 77 places, 79 transitions, 180 flow. Second operand 3 states and 938 transitions. [2023-08-29 21:06:53,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 134 transitions, 549 flow [2023-08-29 21:06:53,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 134 transitions, 547 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:06:53,198 INFO L231 Difference]: Finished difference. Result has 77 places, 80 transitions, 210 flow [2023-08-29 21:06:53,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=77, PETRI_TRANSITIONS=80} [2023-08-29 21:06:53,199 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -29 predicate places. [2023-08-29 21:06:53,202 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 80 transitions, 210 flow [2023-08-29 21:06:53,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 267.6666666666667) internal successors, (803), 3 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:53,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:06:53,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:06:53,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 21:06:53,203 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:06:53,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:06:53,204 INFO L85 PathProgramCache]: Analyzing trace with hash 49024, now seen corresponding path program 1 times [2023-08-29 21:06:53,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:06:53,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453771425] [2023-08-29 21:06:53,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:06:53,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:06:53,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:06:53,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:06:53,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:06:53,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453771425] [2023-08-29 21:06:53,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453771425] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:06:53,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:06:53,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:06:53,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7464854] [2023-08-29 21:06:53,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:06:53,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:06:53,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:06:53,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:06:53,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:06:53,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 741 [2023-08-29 21:06:53,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 80 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 267.6666666666667) internal successors, (803), 3 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:53,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:06:53,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 741 [2023-08-29 21:06:53,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:06:53,775 INFO L130 PetriNetUnfolder]: 1058/2212 cut-off events. [2023-08-29 21:06:53,775 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 21:06:53,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4525 conditions, 2212 events. 1058/2212 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 13238 event pairs, 924 based on Foata normal form. 1/993 useless extension candidates. Maximal degree in co-relation 4518. Up to 2102 conditions per place. [2023-08-29 21:06:53,787 INFO L137 encePairwiseOnDemand]: 738/741 looper letters, 72 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-08-29 21:06:53,787 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 80 transitions, 358 flow [2023-08-29 21:06:53,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:06:53,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:06:53,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 873 transitions. [2023-08-29 21:06:53,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39271255060728744 [2023-08-29 21:06:53,790 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 873 transitions. [2023-08-29 21:06:53,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 873 transitions. [2023-08-29 21:06:53,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:06:53,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 873 transitions. [2023-08-29 21:06:53,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 291.0) internal successors, (873), 3 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:53,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 741.0) internal successors, (2964), 4 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:53,802 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 741.0) internal successors, (2964), 4 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:53,802 INFO L175 Difference]: Start difference. First operand has 77 places, 80 transitions, 210 flow. Second operand 3 states and 873 transitions. [2023-08-29 21:06:53,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 80 transitions, 358 flow [2023-08-29 21:06:53,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 80 transitions, 352 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-29 21:06:53,807 INFO L231 Difference]: Finished difference. Result has 79 places, 80 transitions, 212 flow [2023-08-29 21:06:53,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=79, PETRI_TRANSITIONS=80} [2023-08-29 21:06:53,809 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -27 predicate places. [2023-08-29 21:06:53,809 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 80 transitions, 212 flow [2023-08-29 21:06:53,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 267.6666666666667) internal successors, (803), 3 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:53,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:06:53,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 21:06:53,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 21:06:53,810 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:06:53,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:06:53,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1521710, now seen corresponding path program 1 times [2023-08-29 21:06:53,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:06:53,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567632725] [2023-08-29 21:06:53,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:06:53,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:06:53,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:06:53,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:06:53,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:06:53,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567632725] [2023-08-29 21:06:53,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567632725] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:06:53,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851340054] [2023-08-29 21:06:53,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:06:53,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:06:53,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:06:53,997 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) [2023-08-29 21:06:54,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-29 21:06:54,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:06:54,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-29 21:06:54,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:06:54,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:06:54,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:06:54,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:06:54,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851340054] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:06:54,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:06:54,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-29 21:06:54,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770671434] [2023-08-29 21:06:54,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:06:54,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 21:06:54,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:06:54,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 21:06:54,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:06:54,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 741 [2023-08-29 21:06:54,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 80 transitions, 212 flow. Second operand has 8 states, 8 states have (on average 265.125) internal successors, (2121), 8 states have internal predecessors, (2121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:54,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:06:54,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 741 [2023-08-29 21:06:54,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:06:55,518 INFO L130 PetriNetUnfolder]: 1645/3435 cut-off events. [2023-08-29 21:06:55,519 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-29 21:06:55,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6885 conditions, 3435 events. 1645/3435 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 22657 event pairs, 594 based on Foata normal form. 3/1590 useless extension candidates. Maximal degree in co-relation 6877. Up to 2174 conditions per place. [2023-08-29 21:06:55,548 INFO L137 encePairwiseOnDemand]: 734/741 looper letters, 166 selfloop transitions, 11 changer transitions 0/183 dead transitions. [2023-08-29 21:06:55,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 183 transitions, 808 flow [2023-08-29 21:06:55,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:06:55,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:06:55,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1763 transitions. [2023-08-29 21:06:55,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39653621232568603 [2023-08-29 21:06:55,553 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1763 transitions. [2023-08-29 21:06:55,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1763 transitions. [2023-08-29 21:06:55,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:06:55,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1763 transitions. [2023-08-29 21:06:55,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 293.8333333333333) internal successors, (1763), 6 states have internal predecessors, (1763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:55,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 741.0) internal successors, (5187), 7 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:55,567 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 741.0) internal successors, (5187), 7 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:55,567 INFO L175 Difference]: Start difference. First operand has 79 places, 80 transitions, 212 flow. Second operand 6 states and 1763 transitions. [2023-08-29 21:06:55,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 183 transitions, 808 flow [2023-08-29 21:06:55,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 183 transitions, 804 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:06:55,570 INFO L231 Difference]: Finished difference. Result has 85 places, 89 transitions, 282 flow [2023-08-29 21:06:55,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=282, PETRI_PLACES=85, PETRI_TRANSITIONS=89} [2023-08-29 21:06:55,571 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -21 predicate places. [2023-08-29 21:06:55,572 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 89 transitions, 282 flow [2023-08-29 21:06:55,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 265.125) internal successors, (2121), 8 states have internal predecessors, (2121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:55,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:06:55,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 21:06:55,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-29 21:06:55,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:06:55,779 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:06:55,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:06:55,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1521741, now seen corresponding path program 1 times [2023-08-29 21:06:55,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:06:55,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31398164] [2023-08-29 21:06:55,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:06:55,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:06:55,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:06:55,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:06:55,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:06:55,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31398164] [2023-08-29 21:06:55,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31398164] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:06:55,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797032006] [2023-08-29 21:06:55,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:06:55,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:06:55,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:06:55,852 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) [2023-08-29 21:06:55,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-29 21:06:55,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:06:55,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 21:06:55,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:06:55,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:06:55,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:06:56,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:06:56,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797032006] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:06:56,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:06:56,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-29 21:06:56,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118863847] [2023-08-29 21:06:56,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:06:56,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 21:06:56,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:06:56,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 21:06:56,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:06:56,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 741 [2023-08-29 21:06:56,064 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 89 transitions, 282 flow. Second operand has 8 states, 8 states have (on average 266.125) internal successors, (2129), 8 states have internal predecessors, (2129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:56,064 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:06:56,064 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 741 [2023-08-29 21:06:56,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:06:56,472 INFO L130 PetriNetUnfolder]: 1464/3059 cut-off events. [2023-08-29 21:06:56,472 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-29 21:06:56,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6405 conditions, 3059 events. 1464/3059 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 19523 event pairs, 1232 based on Foata normal form. 1/1447 useless extension candidates. Maximal degree in co-relation 6394. Up to 2895 conditions per place. [2023-08-29 21:06:56,490 INFO L137 encePairwiseOnDemand]: 736/741 looper letters, 77 selfloop transitions, 4 changer transitions 0/87 dead transitions. [2023-08-29 21:06:56,491 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 87 transitions, 434 flow [2023-08-29 21:06:56,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:06:56,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:06:56,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1399 transitions. [2023-08-29 21:06:56,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3775978407557355 [2023-08-29 21:06:56,496 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1399 transitions. [2023-08-29 21:06:56,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1399 transitions. [2023-08-29 21:06:56,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:06:56,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1399 transitions. [2023-08-29 21:06:56,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 279.8) internal successors, (1399), 5 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:56,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 741.0) internal successors, (4446), 6 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:56,505 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 741.0) internal successors, (4446), 6 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:56,506 INFO L175 Difference]: Start difference. First operand has 85 places, 89 transitions, 282 flow. Second operand 5 states and 1399 transitions. [2023-08-29 21:06:56,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 87 transitions, 434 flow [2023-08-29 21:06:56,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 87 transitions, 424 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-29 21:06:56,513 INFO L231 Difference]: Finished difference. Result has 89 places, 87 transitions, 276 flow [2023-08-29 21:06:56,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=276, PETRI_PLACES=89, PETRI_TRANSITIONS=87} [2023-08-29 21:06:56,515 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -17 predicate places. [2023-08-29 21:06:56,515 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 87 transitions, 276 flow [2023-08-29 21:06:56,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 266.125) internal successors, (2129), 8 states have internal predecessors, (2129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:56,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:06:56,517 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-08-29 21:06:56,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-29 21:06:56,722 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,SelfDestructingSolverStorable5 [2023-08-29 21:06:56,723 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:06:56,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:06:56,723 INFO L85 PathProgramCache]: Analyzing trace with hash 47175007, now seen corresponding path program 2 times [2023-08-29 21:06:56,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:06:56,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930859190] [2023-08-29 21:06:56,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:06:56,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:06:56,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:06:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:06:56,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:06:56,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930859190] [2023-08-29 21:06:56,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930859190] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:06:56,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:06:56,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:06:56,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541941347] [2023-08-29 21:06:56,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:06:56,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:06:56,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:06:56,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:06:56,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:06:56,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 741 [2023-08-29 21:06:56,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 87 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 269.0) internal successors, (807), 3 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:56,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:06:56,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 741 [2023-08-29 21:06:56,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:06:57,338 INFO L130 PetriNetUnfolder]: 1398/2918 cut-off events. [2023-08-29 21:06:57,338 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-08-29 21:06:57,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6031 conditions, 2918 events. 1398/2918 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 18388 event pairs, 396 based on Foata normal form. 0/1374 useless extension candidates. Maximal degree in co-relation 6018. Up to 1775 conditions per place. [2023-08-29 21:06:57,349 INFO L137 encePairwiseOnDemand]: 735/741 looper letters, 101 selfloop transitions, 7 changer transitions 0/114 dead transitions. [2023-08-29 21:06:57,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 114 transitions, 549 flow [2023-08-29 21:06:57,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:06:57,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:06:57,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 904 transitions. [2023-08-29 21:06:57,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40665766981556456 [2023-08-29 21:06:57,352 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 904 transitions. [2023-08-29 21:06:57,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 904 transitions. [2023-08-29 21:06:57,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:06:57,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 904 transitions. [2023-08-29 21:06:57,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 301.3333333333333) internal successors, (904), 3 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:57,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 741.0) internal successors, (2964), 4 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:57,358 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 741.0) internal successors, (2964), 4 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:57,358 INFO L175 Difference]: Start difference. First operand has 89 places, 87 transitions, 276 flow. Second operand 3 states and 904 transitions. [2023-08-29 21:06:57,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 114 transitions, 549 flow [2023-08-29 21:06:57,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 114 transitions, 537 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-29 21:06:57,361 INFO L231 Difference]: Finished difference. Result has 87 places, 88 transitions, 295 flow [2023-08-29 21:06:57,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=295, PETRI_PLACES=87, PETRI_TRANSITIONS=88} [2023-08-29 21:06:57,362 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -19 predicate places. [2023-08-29 21:06:57,362 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 88 transitions, 295 flow [2023-08-29 21:06:57,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 269.0) internal successors, (807), 3 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:57,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:06:57,363 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-08-29 21:06:57,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 21:06:57,363 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:06:57,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:06:57,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1462426561, now seen corresponding path program 1 times [2023-08-29 21:06:57,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:06:57,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321964048] [2023-08-29 21:06:57,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:06:57,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:06:57,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:06:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:06:57,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:06:57,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321964048] [2023-08-29 21:06:57,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321964048] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:06:57,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:06:57,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:06:57,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877839336] [2023-08-29 21:06:57,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:06:57,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:06:57,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:06:57,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:06:57,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:06:57,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 741 [2023-08-29 21:06:57,661 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 88 transitions, 295 flow. Second operand has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:57,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:06:57,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 741 [2023-08-29 21:06:57,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:06:58,072 INFO L130 PetriNetUnfolder]: 1203/2541 cut-off events. [2023-08-29 21:06:58,072 INFO L131 PetriNetUnfolder]: For 125/125 co-relation queries the response was YES. [2023-08-29 21:06:58,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5426 conditions, 2541 events. 1203/2541 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 16115 event pairs, 380 based on Foata normal form. 0/1229 useless extension candidates. Maximal degree in co-relation 5413. Up to 1751 conditions per place. [2023-08-29 21:06:58,088 INFO L137 encePairwiseOnDemand]: 730/741 looper letters, 112 selfloop transitions, 17 changer transitions 3/138 dead transitions. [2023-08-29 21:06:58,088 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 138 transitions, 696 flow [2023-08-29 21:06:58,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:06:58,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:06:58,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1158 transitions. [2023-08-29 21:06:58,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39068825910931176 [2023-08-29 21:06:58,092 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1158 transitions. [2023-08-29 21:06:58,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1158 transitions. [2023-08-29 21:06:58,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:06:58,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1158 transitions. [2023-08-29 21:06:58,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 289.5) internal successors, (1158), 4 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:58,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 741.0) internal successors, (3705), 5 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:58,100 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 741.0) internal successors, (3705), 5 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:58,100 INFO L175 Difference]: Start difference. First operand has 87 places, 88 transitions, 295 flow. Second operand 4 states and 1158 transitions. [2023-08-29 21:06:58,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 138 transitions, 696 flow [2023-08-29 21:06:58,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 138 transitions, 679 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-29 21:06:58,103 INFO L231 Difference]: Finished difference. Result has 91 places, 97 transitions, 401 flow [2023-08-29 21:06:58,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=401, PETRI_PLACES=91, PETRI_TRANSITIONS=97} [2023-08-29 21:06:58,104 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -15 predicate places. [2023-08-29 21:06:58,104 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 97 transitions, 401 flow [2023-08-29 21:06:58,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:58,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:06:58,105 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-08-29 21:06:58,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 21:06:58,105 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:06:58,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:06:58,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1462426560, now seen corresponding path program 1 times [2023-08-29 21:06:58,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:06:58,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580881654] [2023-08-29 21:06:58,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:06:58,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:06:58,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:06:58,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:06:58,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:06:58,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580881654] [2023-08-29 21:06:58,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580881654] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:06:58,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:06:58,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:06:58,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287702586] [2023-08-29 21:06:58,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:06:58,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:06:58,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:06:58,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:06:58,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:06:58,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 741 [2023-08-29 21:06:58,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 97 transitions, 401 flow. Second operand has 3 states, 3 states have (on average 268.3333333333333) internal successors, (805), 3 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:58,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:06:58,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 741 [2023-08-29 21:06:58,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:06:58,596 INFO L130 PetriNetUnfolder]: 1053/2231 cut-off events. [2023-08-29 21:06:58,596 INFO L131 PetriNetUnfolder]: For 804/804 co-relation queries the response was YES. [2023-08-29 21:06:58,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5475 conditions, 2231 events. 1053/2231 cut-off events. For 804/804 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 13382 event pairs, 431 based on Foata normal form. 0/1408 useless extension candidates. Maximal degree in co-relation 5460. Up to 1134 conditions per place. [2023-08-29 21:06:58,608 INFO L137 encePairwiseOnDemand]: 735/741 looper letters, 134 selfloop transitions, 4 changer transitions 0/144 dead transitions. [2023-08-29 21:06:58,608 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 144 transitions, 788 flow [2023-08-29 21:06:58,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:06:58,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:06:58,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 925 transitions. [2023-08-29 21:06:58,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4161043634727845 [2023-08-29 21:06:58,612 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 925 transitions. [2023-08-29 21:06:58,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 925 transitions. [2023-08-29 21:06:58,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:06:58,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 925 transitions. [2023-08-29 21:06:58,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 308.3333333333333) internal successors, (925), 3 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:58,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 741.0) internal successors, (2964), 4 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:58,630 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 741.0) internal successors, (2964), 4 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:58,630 INFO L175 Difference]: Start difference. First operand has 91 places, 97 transitions, 401 flow. Second operand 3 states and 925 transitions. [2023-08-29 21:06:58,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 144 transitions, 788 flow [2023-08-29 21:06:58,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 144 transitions, 762 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:06:58,635 INFO L231 Difference]: Finished difference. Result has 92 places, 97 transitions, 391 flow [2023-08-29 21:06:58,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=391, PETRI_PLACES=92, PETRI_TRANSITIONS=97} [2023-08-29 21:06:58,637 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -14 predicate places. [2023-08-29 21:06:58,637 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 97 transitions, 391 flow [2023-08-29 21:06:58,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 268.3333333333333) internal successors, (805), 3 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:58,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:06:58,638 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-29 21:06:58,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 21:06:58,638 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:06:58,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:06:58,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1909425408, now seen corresponding path program 2 times [2023-08-29 21:06:58,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:06:58,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005228273] [2023-08-29 21:06:58,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:06:58,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:06:58,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:06:58,785 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:06:58,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:06:58,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005228273] [2023-08-29 21:06:58,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005228273] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:06:58,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037998967] [2023-08-29 21:06:58,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 21:06:58,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:06:58,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:06:58,787 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) [2023-08-29 21:06:58,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-29 21:06:58,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 21:06:58,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 21:06:58,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 21:06:58,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:06:58,954 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 21:06:58,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:06:58,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037998967] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:06:58,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 21:06:58,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2023-08-29 21:06:58,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073797143] [2023-08-29 21:06:58,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:06:58,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:06:58,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:06:58,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:06:58,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2023-08-29 21:06:58,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 741 [2023-08-29 21:06:58,983 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 97 transitions, 391 flow. Second operand has 5 states, 5 states have (on average 267.2) internal successors, (1336), 5 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:58,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:06:58,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 741 [2023-08-29 21:06:58,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:06:59,236 INFO L130 PetriNetUnfolder]: 884/1859 cut-off events. [2023-08-29 21:06:59,236 INFO L131 PetriNetUnfolder]: For 643/643 co-relation queries the response was YES. [2023-08-29 21:06:59,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4622 conditions, 1859 events. 884/1859 cut-off events. For 643/643 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 11103 event pairs, 626 based on Foata normal form. 1/1216 useless extension candidates. Maximal degree in co-relation 4606. Up to 1770 conditions per place. [2023-08-29 21:06:59,245 INFO L137 encePairwiseOnDemand]: 739/741 looper letters, 76 selfloop transitions, 3 changer transitions 0/85 dead transitions. [2023-08-29 21:06:59,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 85 transitions, 460 flow [2023-08-29 21:06:59,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:06:59,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:06:59,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1400 transitions. [2023-08-29 21:06:59,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37786774628879893 [2023-08-29 21:06:59,250 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1400 transitions. [2023-08-29 21:06:59,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1400 transitions. [2023-08-29 21:06:59,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:06:59,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1400 transitions. [2023-08-29 21:06:59,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:59,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 741.0) internal successors, (4446), 6 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:59,259 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 741.0) internal successors, (4446), 6 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:59,259 INFO L175 Difference]: Start difference. First operand has 92 places, 97 transitions, 391 flow. Second operand 5 states and 1400 transitions. [2023-08-29 21:06:59,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 85 transitions, 460 flow [2023-08-29 21:06:59,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 85 transitions, 440 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-29 21:06:59,261 INFO L231 Difference]: Finished difference. Result has 88 places, 85 transitions, 288 flow [2023-08-29 21:06:59,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=288, PETRI_PLACES=88, PETRI_TRANSITIONS=85} [2023-08-29 21:06:59,262 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -18 predicate places. [2023-08-29 21:06:59,262 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 85 transitions, 288 flow [2023-08-29 21:06:59,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 267.2) internal successors, (1336), 5 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:06:59,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:06:59,263 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-29 21:06:59,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-29 21:06:59,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:06:59,470 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:06:59,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:06:59,470 INFO L85 PathProgramCache]: Analyzing trace with hash -997547746, now seen corresponding path program 1 times [2023-08-29 21:06:59,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:06:59,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401836704] [2023-08-29 21:06:59,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:06:59,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:06:59,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:06:59,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:06:59,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:06:59,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401836704] [2023-08-29 21:06:59,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401836704] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:06:59,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171016855] [2023-08-29 21:06:59,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:06:59,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:06:59,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:06:59,656 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) [2023-08-29 21:06:59,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-29 21:06:59,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:06:59,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-29 21:06:59,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:06:59,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:06:59,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:06:59,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:06:59,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171016855] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:06:59,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:06:59,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2023-08-29 21:06:59,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581783457] [2023-08-29 21:06:59,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:06:59,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-29 21:06:59,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:06:59,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-29 21:06:59,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-08-29 21:07:00,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 741 [2023-08-29 21:07:00,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 85 transitions, 288 flow. Second operand has 11 states, 11 states have (on average 255.9090909090909) internal successors, (2815), 11 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:00,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:07:00,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 741 [2023-08-29 21:07:00,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:07:01,158 INFO L130 PetriNetUnfolder]: 867/1952 cut-off events. [2023-08-29 21:07:01,158 INFO L131 PetriNetUnfolder]: For 573/573 co-relation queries the response was YES. [2023-08-29 21:07:01,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4745 conditions, 1952 events. 867/1952 cut-off events. For 573/573 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 12832 event pairs, 492 based on Foata normal form. 26/1284 useless extension candidates. Maximal degree in co-relation 4732. Up to 1430 conditions per place. [2023-08-29 21:07:01,166 INFO L137 encePairwiseOnDemand]: 731/741 looper letters, 147 selfloop transitions, 13 changer transitions 2/168 dead transitions. [2023-08-29 21:07:01,167 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 168 transitions, 812 flow [2023-08-29 21:07:01,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:07:01,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:07:01,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1681 transitions. [2023-08-29 21:07:01,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780926675663518 [2023-08-29 21:07:01,173 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1681 transitions. [2023-08-29 21:07:01,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1681 transitions. [2023-08-29 21:07:01,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:07:01,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1681 transitions. [2023-08-29 21:07:01,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 280.1666666666667) internal successors, (1681), 6 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:01,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 741.0) internal successors, (5187), 7 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:01,184 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 741.0) internal successors, (5187), 7 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:01,184 INFO L175 Difference]: Start difference. First operand has 88 places, 85 transitions, 288 flow. Second operand 6 states and 1681 transitions. [2023-08-29 21:07:01,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 168 transitions, 812 flow [2023-08-29 21:07:01,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 168 transitions, 797 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-29 21:07:01,189 INFO L231 Difference]: Finished difference. Result has 93 places, 88 transitions, 337 flow [2023-08-29 21:07:01,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=337, PETRI_PLACES=93, PETRI_TRANSITIONS=88} [2023-08-29 21:07:01,189 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -13 predicate places. [2023-08-29 21:07:01,190 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 88 transitions, 337 flow [2023-08-29 21:07:01,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 255.9090909090909) internal successors, (2815), 11 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:01,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:07:01,191 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:07:01,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-29 21:07:01,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:07:01,397 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting threadErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:07:01,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:07:01,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1096320209, now seen corresponding path program 1 times [2023-08-29 21:07:01,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:07:01,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634402284] [2023-08-29 21:07:01,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:07:01,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:07:01,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:07:02,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:07:02,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:07:02,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634402284] [2023-08-29 21:07:02,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634402284] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:07:02,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244935902] [2023-08-29 21:07:02,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:07:02,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:07:02,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:07:02,195 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) [2023-08-29 21:07:02,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-29 21:07:02,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:07:02,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 72 conjunts are in the unsatisfiable core [2023-08-29 21:07:02,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:07:02,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 8 [2023-08-29 21:07:02,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-29 21:07:02,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:07:02,423 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 18 [2023-08-29 21:07:02,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:07:02,471 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 18 [2023-08-29 21:07:02,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:07:02,509 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 18 [2023-08-29 21:07:02,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:07:02,540 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 14 treesize of output 16 [2023-08-29 21:07:02,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:07:02,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:07:02,650 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_~#stack~0.offset| 24))) (and (forall ((v_ArrVal_179 (Array Int Int))) (<= (+ (* (select (select (store |c_#memory_int| |c_~#threads~0.base| v_ArrVal_179) |c_~#stack~0.base|) .cse0) 8) 8 |c_~#stack~0.offset|) (select |c_#length| |c_~#stack~0.base|))) (forall ((v_ArrVal_179 (Array Int Int))) (<= 0 (+ (* (select (select (store |c_#memory_int| |c_~#threads~0.base| v_ArrVal_179) |c_~#stack~0.base|) .cse0) 8) |c_~#stack~0.offset| 4))))) is different from false [2023-08-29 21:07:04,699 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| |c_~#stack~0.base|)) (.cse2 (+ |c_~#stack~0.offset| 24)) (.cse0 (+ (* |c_ULTIMATE.start_Init_~pushCount#1| 8) |c_~#stack~0.offset|))) (and (forall ((|v_ULTIMATE.start_atomic_store_~obj#1.offset_150| Int)) (or (< .cse0 (+ 4 |v_ULTIMATE.start_atomic_store_~obj#1.offset_150|)) (forall ((v_ArrVal_177 Int) (v_ArrVal_179 (Array Int Int))) (<= (+ 8 |c_~#stack~0.offset| (* (select (select (store (store |c_#memory_int| |c_~#stack~0.base| (store .cse1 |v_ULTIMATE.start_atomic_store_~obj#1.offset_150| v_ArrVal_177)) |c_~#threads~0.base| v_ArrVal_179) |c_~#stack~0.base|) .cse2) 8)) (select |c_#length| |c_~#stack~0.base|))))) (forall ((|v_ULTIMATE.start_atomic_store_~obj#1.offset_150| Int)) (or (forall ((v_ArrVal_177 Int) (v_ArrVal_179 (Array Int Int))) (<= 0 (+ |c_~#stack~0.offset| 4 (* (select (select (store (store |c_#memory_int| |c_~#stack~0.base| (store .cse1 |v_ULTIMATE.start_atomic_store_~obj#1.offset_150| v_ArrVal_177)) |c_~#threads~0.base| v_ArrVal_179) |c_~#stack~0.base|) .cse2) 8)))) (< .cse0 (+ 4 |v_ULTIMATE.start_atomic_store_~obj#1.offset_150|)))))) is different from false [2023-08-29 21:07:06,783 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* |c_ULTIMATE.start_Init_~pushCount#1| 8) |c_~#stack~0.offset|)) (.cse1 (select |c_#memory_int| |c_~#stack~0.base|)) (.cse2 (+ |c_~#stack~0.offset| 24)) (.cse3 (+ |c_~#stack~0.offset| 4 (* |c_ULTIMATE.start_Init_~i~0#1| 8)))) (and (forall ((|v_ULTIMATE.start_atomic_store_~obj#1.offset_151| Int)) (or (forall ((v_ArrVal_175 Int) (|v_ULTIMATE.start_atomic_store_~obj#1.offset_150| Int)) (or (< .cse0 (+ 4 |v_ULTIMATE.start_atomic_store_~obj#1.offset_150|)) (forall ((v_ArrVal_177 Int) (v_ArrVal_179 (Array Int Int))) (<= (+ (* 8 (select (select (store (store |c_#memory_int| |c_~#stack~0.base| (store (store .cse1 |v_ULTIMATE.start_atomic_store_~obj#1.offset_151| v_ArrVal_175) |v_ULTIMATE.start_atomic_store_~obj#1.offset_150| v_ArrVal_177)) |c_~#threads~0.base| v_ArrVal_179) |c_~#stack~0.base|) .cse2)) 8 |c_~#stack~0.offset|) (select |c_#length| |c_~#stack~0.base|))))) (< .cse3 |v_ULTIMATE.start_atomic_store_~obj#1.offset_151|))) (forall ((|v_ULTIMATE.start_atomic_store_~obj#1.offset_151| Int)) (or (forall ((v_ArrVal_175 Int) (|v_ULTIMATE.start_atomic_store_~obj#1.offset_150| Int)) (or (< .cse0 (+ 4 |v_ULTIMATE.start_atomic_store_~obj#1.offset_150|)) (forall ((v_ArrVal_177 Int) (v_ArrVal_179 (Array Int Int))) (<= 0 (+ (* 8 (select (select (store (store |c_#memory_int| |c_~#stack~0.base| (store (store .cse1 |v_ULTIMATE.start_atomic_store_~obj#1.offset_151| v_ArrVal_175) |v_ULTIMATE.start_atomic_store_~obj#1.offset_150| v_ArrVal_177)) |c_~#threads~0.base| v_ArrVal_179) |c_~#stack~0.base|) .cse2)) |c_~#stack~0.offset| 4))))) (< .cse3 |v_ULTIMATE.start_atomic_store_~obj#1.offset_151|))))) is different from false [2023-08-29 21:07:08,940 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (* |c_ULTIMATE.start_Init_~i~0#1| 8))) (let ((.cse4 (+ |c_~#stack~0.offset| 4 .cse5)) (.cse2 (+ 12 |c_~#stack~0.offset| .cse5)) (.cse3 (+ (* |c_ULTIMATE.start_Init_~pushCount#1| 8) |c_~#stack~0.offset|)) (.cse0 (select |c_#memory_int| |c_~#stack~0.base|)) (.cse1 (+ |c_~#stack~0.offset| 24))) (and (forall ((|v_ULTIMATE.start_atomic_store_~obj#1.offset_152| Int)) (or (forall ((v_ArrVal_177 Int) (v_ArrVal_175 Int) (v_ArrVal_174 Int) (|v_ULTIMATE.start_atomic_store_~obj#1.offset_151| Int) (|v_ULTIMATE.start_atomic_store_~obj#1.offset_150| Int) (v_ArrVal_179 (Array Int Int))) (or (<= (+ (* 8 (select (select (store (store |c_#memory_int| |c_~#stack~0.base| (store (store (store .cse0 |v_ULTIMATE.start_atomic_store_~obj#1.offset_152| v_ArrVal_174) |v_ULTIMATE.start_atomic_store_~obj#1.offset_151| v_ArrVal_175) |v_ULTIMATE.start_atomic_store_~obj#1.offset_150| v_ArrVal_177)) |c_~#threads~0.base| v_ArrVal_179) |c_~#stack~0.base|) .cse1)) 8 |c_~#stack~0.offset|) (select |c_#length| |c_~#stack~0.base|)) (< .cse2 |v_ULTIMATE.start_atomic_store_~obj#1.offset_151|) (< .cse3 (+ 4 |v_ULTIMATE.start_atomic_store_~obj#1.offset_150|)))) (< .cse4 |v_ULTIMATE.start_atomic_store_~obj#1.offset_152|))) (forall ((|v_ULTIMATE.start_atomic_store_~obj#1.offset_152| Int)) (or (< .cse4 |v_ULTIMATE.start_atomic_store_~obj#1.offset_152|) (forall ((v_ArrVal_177 Int) (v_ArrVal_175 Int) (v_ArrVal_174 Int) (|v_ULTIMATE.start_atomic_store_~obj#1.offset_151| Int) (|v_ULTIMATE.start_atomic_store_~obj#1.offset_150| Int) (v_ArrVal_179 (Array Int Int))) (or (< .cse2 |v_ULTIMATE.start_atomic_store_~obj#1.offset_151|) (< .cse3 (+ 4 |v_ULTIMATE.start_atomic_store_~obj#1.offset_150|)) (<= 0 (+ (* 8 (select (select (store (store |c_#memory_int| |c_~#stack~0.base| (store (store (store .cse0 |v_ULTIMATE.start_atomic_store_~obj#1.offset_152| v_ArrVal_174) |v_ULTIMATE.start_atomic_store_~obj#1.offset_151| v_ArrVal_175) |v_ULTIMATE.start_atomic_store_~obj#1.offset_150| v_ArrVal_177)) |c_~#threads~0.base| v_ArrVal_179) |c_~#stack~0.base|) .cse1)) |c_~#stack~0.offset| 4))))))))) is different from false [2023-08-29 21:07:08,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-08-29 21:07:08,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244935902] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:07:08,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:07:08,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-08-29 21:07:08,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438657867] [2023-08-29 21:07:08,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:07:08,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-29 21:07:08,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:07:08,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-29 21:07:08,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=102, Unknown=4, NotChecked=100, Total=272 [2023-08-29 21:07:09,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 741 [2023-08-29 21:07:09,058 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 88 transitions, 337 flow. Second operand has 17 states, 17 states have (on average 192.94117647058823) internal successors, (3280), 17 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:09,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:07:09,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 741 [2023-08-29 21:07:09,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:07:13,859 INFO L130 PetriNetUnfolder]: 925/2005 cut-off events. [2023-08-29 21:07:13,859 INFO L131 PetriNetUnfolder]: For 1614/1614 co-relation queries the response was YES. [2023-08-29 21:07:13,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5335 conditions, 2005 events. 925/2005 cut-off events. For 1614/1614 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12964 event pairs, 690 based on Foata normal form. 0/1301 useless extension candidates. Maximal degree in co-relation 5320. Up to 1913 conditions per place. [2023-08-29 21:07:13,869 INFO L137 encePairwiseOnDemand]: 736/741 looper letters, 94 selfloop transitions, 5 changer transitions 1/102 dead transitions. [2023-08-29 21:07:13,869 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 102 transitions, 574 flow [2023-08-29 21:07:13,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:07:13,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:07:13,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1043 transitions. [2023-08-29 21:07:13,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2815114709851552 [2023-08-29 21:07:13,873 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1043 transitions. [2023-08-29 21:07:13,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1043 transitions. [2023-08-29 21:07:13,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:07:13,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1043 transitions. [2023-08-29 21:07:13,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 208.6) internal successors, (1043), 5 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:13,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 741.0) internal successors, (4446), 6 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:13,880 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 741.0) internal successors, (4446), 6 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:13,880 INFO L175 Difference]: Start difference. First operand has 93 places, 88 transitions, 337 flow. Second operand 5 states and 1043 transitions. [2023-08-29 21:07:13,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 102 transitions, 574 flow [2023-08-29 21:07:13,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 102 transitions, 554 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-29 21:07:13,886 INFO L231 Difference]: Finished difference. Result has 94 places, 90 transitions, 342 flow [2023-08-29 21:07:13,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=342, PETRI_PLACES=94, PETRI_TRANSITIONS=90} [2023-08-29 21:07:13,888 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -12 predicate places. [2023-08-29 21:07:13,888 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 90 transitions, 342 flow [2023-08-29 21:07:13,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 192.94117647058823) internal successors, (3280), 17 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:13,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:07:13,889 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:07:13,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-29 21:07:14,096 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,SelfDestructingSolverStorable11 [2023-08-29 21:07:14,096 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting threadErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:07:14,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:07:14,096 INFO L85 PathProgramCache]: Analyzing trace with hash 373927313, now seen corresponding path program 1 times [2023-08-29 21:07:14,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:07:14,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577112525] [2023-08-29 21:07:14,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:07:14,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:07:14,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:07:14,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:07:14,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:07:14,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577112525] [2023-08-29 21:07:14,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577112525] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:07:14,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:07:14,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:07:14,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055981437] [2023-08-29 21:07:14,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:07:14,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:07:14,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:07:14,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:07:14,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:07:14,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 741 [2023-08-29 21:07:14,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 90 transitions, 342 flow. Second operand has 3 states, 3 states have (on average 271.3333333333333) internal successors, (814), 3 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:14,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:07:14,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 741 [2023-08-29 21:07:14,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:07:14,586 INFO L130 PetriNetUnfolder]: 1131/2462 cut-off events. [2023-08-29 21:07:14,586 INFO L131 PetriNetUnfolder]: For 1665/1665 co-relation queries the response was YES. [2023-08-29 21:07:14,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6578 conditions, 2462 events. 1131/2462 cut-off events. For 1665/1665 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 16713 event pairs, 624 based on Foata normal form. 0/1702 useless extension candidates. Maximal degree in co-relation 6561. Up to 1488 conditions per place. [2023-08-29 21:07:14,601 INFO L137 encePairwiseOnDemand]: 737/741 looper letters, 122 selfloop transitions, 4 changer transitions 0/132 dead transitions. [2023-08-29 21:07:14,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 132 transitions, 746 flow [2023-08-29 21:07:14,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:07:14,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:07:14,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 910 transitions. [2023-08-29 21:07:14,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4093567251461988 [2023-08-29 21:07:14,604 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 910 transitions. [2023-08-29 21:07:14,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 910 transitions. [2023-08-29 21:07:14,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:07:14,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 910 transitions. [2023-08-29 21:07:14,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 303.3333333333333) internal successors, (910), 3 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:14,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 741.0) internal successors, (2964), 4 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:14,610 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 741.0) internal successors, (2964), 4 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:14,610 INFO L175 Difference]: Start difference. First operand has 94 places, 90 transitions, 342 flow. Second operand 3 states and 910 transitions. [2023-08-29 21:07:14,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 132 transitions, 746 flow [2023-08-29 21:07:14,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 132 transitions, 725 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-08-29 21:07:14,616 INFO L231 Difference]: Finished difference. Result has 95 places, 90 transitions, 336 flow [2023-08-29 21:07:14,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=336, PETRI_PLACES=95, PETRI_TRANSITIONS=90} [2023-08-29 21:07:14,617 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -11 predicate places. [2023-08-29 21:07:14,617 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 90 transitions, 336 flow [2023-08-29 21:07:14,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 271.3333333333333) internal successors, (814), 3 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:14,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:07:14,618 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:07:14,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-29 21:07:14,618 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:07:14,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:07:14,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1543577850, now seen corresponding path program 1 times [2023-08-29 21:07:14,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:07:14,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984772632] [2023-08-29 21:07:14,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:07:14,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:07:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:07:14,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:07:14,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:07:14,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984772632] [2023-08-29 21:07:14,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984772632] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:07:14,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:07:14,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:07:14,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777786830] [2023-08-29 21:07:14,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:07:14,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:07:14,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:07:14,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:07:14,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:07:15,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 741 [2023-08-29 21:07:15,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 90 transitions, 336 flow. Second operand has 4 states, 4 states have (on average 262.25) internal successors, (1049), 4 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:15,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:07:15,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 741 [2023-08-29 21:07:15,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:07:15,740 INFO L130 PetriNetUnfolder]: 1741/3724 cut-off events. [2023-08-29 21:07:15,740 INFO L131 PetriNetUnfolder]: For 2644/2644 co-relation queries the response was YES. [2023-08-29 21:07:15,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10048 conditions, 3724 events. 1741/3724 cut-off events. For 2644/2644 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 22850 event pairs, 438 based on Foata normal form. 116/2794 useless extension candidates. Maximal degree in co-relation 10030. Up to 1887 conditions per place. [2023-08-29 21:07:15,754 INFO L137 encePairwiseOnDemand]: 724/741 looper letters, 141 selfloop transitions, 12 changer transitions 1/158 dead transitions. [2023-08-29 21:07:15,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 158 transitions, 878 flow [2023-08-29 21:07:15,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:07:15,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:07:15,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1180 transitions. [2023-08-29 21:07:15,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.398110661268556 [2023-08-29 21:07:15,758 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1180 transitions. [2023-08-29 21:07:15,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1180 transitions. [2023-08-29 21:07:15,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:07:15,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1180 transitions. [2023-08-29 21:07:15,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:15,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 741.0) internal successors, (3705), 5 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:15,765 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 741.0) internal successors, (3705), 5 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:15,765 INFO L175 Difference]: Start difference. First operand has 95 places, 90 transitions, 336 flow. Second operand 4 states and 1180 transitions. [2023-08-29 21:07:15,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 158 transitions, 878 flow [2023-08-29 21:07:15,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 158 transitions, 864 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:07:15,772 INFO L231 Difference]: Finished difference. Result has 98 places, 96 transitions, 442 flow [2023-08-29 21:07:15,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=442, PETRI_PLACES=98, PETRI_TRANSITIONS=96} [2023-08-29 21:07:15,773 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -8 predicate places. [2023-08-29 21:07:15,773 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 96 transitions, 442 flow [2023-08-29 21:07:15,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 262.25) internal successors, (1049), 4 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:15,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:07:15,774 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:07:15,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-29 21:07:15,774 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:07:15,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:07:15,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1887680263, now seen corresponding path program 1 times [2023-08-29 21:07:15,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:07:15,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584977492] [2023-08-29 21:07:15,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:07:15,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:07:15,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:07:16,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:07:16,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:07:16,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584977492] [2023-08-29 21:07:16,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584977492] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:07:16,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019357153] [2023-08-29 21:07:16,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:07:16,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:07:16,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:07:16,085 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) [2023-08-29 21:07:16,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-29 21:07:16,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:07:16,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 21:07:16,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:07:16,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:07:16,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-08-29 21:07:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:07:16,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:07:24,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:07:24,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019357153] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:07:24,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:07:24,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2023-08-29 21:07:24,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044260545] [2023-08-29 21:07:24,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:07:24,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 21:07:24,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:07:24,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 21:07:24,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-08-29 21:07:28,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 741 [2023-08-29 21:07:28,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 96 transitions, 442 flow. Second operand has 15 states, 15 states have (on average 252.8) internal successors, (3792), 15 states have internal predecessors, (3792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:28,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:07:28,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 741 [2023-08-29 21:07:28,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:07:30,112 INFO L130 PetriNetUnfolder]: 1778/4304 cut-off events. [2023-08-29 21:07:30,113 INFO L131 PetriNetUnfolder]: For 3887/3887 co-relation queries the response was YES. [2023-08-29 21:07:30,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12137 conditions, 4304 events. 1778/4304 cut-off events. For 3887/3887 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 31218 event pairs, 805 based on Foata normal form. 64/3298 useless extension candidates. Maximal degree in co-relation 12117. Up to 2707 conditions per place. [2023-08-29 21:07:30,131 INFO L137 encePairwiseOnDemand]: 728/741 looper letters, 259 selfloop transitions, 43 changer transitions 3/311 dead transitions. [2023-08-29 21:07:30,131 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 311 transitions, 1864 flow [2023-08-29 21:07:30,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 21:07:30,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 21:07:30,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2515 transitions. [2023-08-29 21:07:30,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37711800869695605 [2023-08-29 21:07:30,137 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2515 transitions. [2023-08-29 21:07:30,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2515 transitions. [2023-08-29 21:07:30,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:07:30,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2515 transitions. [2023-08-29 21:07:30,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 279.44444444444446) internal successors, (2515), 9 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:30,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 741.0) internal successors, (7410), 10 states have internal predecessors, (7410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:30,152 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 741.0) internal successors, (7410), 10 states have internal predecessors, (7410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:30,152 INFO L175 Difference]: Start difference. First operand has 98 places, 96 transitions, 442 flow. Second operand 9 states and 2515 transitions. [2023-08-29 21:07:30,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 311 transitions, 1864 flow [2023-08-29 21:07:30,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 311 transitions, 1831 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-08-29 21:07:30,168 INFO L231 Difference]: Finished difference. Result has 109 places, 132 transitions, 899 flow [2023-08-29 21:07:30,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=899, PETRI_PLACES=109, PETRI_TRANSITIONS=132} [2023-08-29 21:07:30,169 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 3 predicate places. [2023-08-29 21:07:30,169 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 132 transitions, 899 flow [2023-08-29 21:07:30,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 252.8) internal successors, (3792), 15 states have internal predecessors, (3792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:30,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:07:30,170 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:07:30,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-29 21:07:30,377 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,SelfDestructingSolverStorable14 [2023-08-29 21:07:30,377 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting threadErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:07:30,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:07:30,377 INFO L85 PathProgramCache]: Analyzing trace with hash -606276608, now seen corresponding path program 1 times [2023-08-29 21:07:30,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:07:30,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211541700] [2023-08-29 21:07:30,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:07:30,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:07:30,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:07:30,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:07:30,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:07:30,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211541700] [2023-08-29 21:07:30,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211541700] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:07:30,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:07:30,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:07:30,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893896599] [2023-08-29 21:07:30,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:07:30,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:07:30,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:07:30,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:07:30,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:07:30,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 741 [2023-08-29 21:07:30,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 132 transitions, 899 flow. Second operand has 4 states, 4 states have (on average 266.5) internal successors, (1066), 4 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:30,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:07:30,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 741 [2023-08-29 21:07:30,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:07:31,237 INFO L130 PetriNetUnfolder]: 1840/4399 cut-off events. [2023-08-29 21:07:31,238 INFO L131 PetriNetUnfolder]: For 8952/8952 co-relation queries the response was YES. [2023-08-29 21:07:31,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13628 conditions, 4399 events. 1840/4399 cut-off events. For 8952/8952 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 32397 event pairs, 445 based on Foata normal form. 0/3198 useless extension candidates. Maximal degree in co-relation 13604. Up to 2527 conditions per place. [2023-08-29 21:07:31,259 INFO L137 encePairwiseOnDemand]: 728/741 looper letters, 120 selfloop transitions, 49 changer transitions 0/175 dead transitions. [2023-08-29 21:07:31,260 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 175 transitions, 1477 flow [2023-08-29 21:07:31,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:07:31,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:07:31,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1422 transitions. [2023-08-29 21:07:31,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3838056680161943 [2023-08-29 21:07:31,263 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1422 transitions. [2023-08-29 21:07:31,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1422 transitions. [2023-08-29 21:07:31,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:07:31,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1422 transitions. [2023-08-29 21:07:31,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 284.4) internal successors, (1422), 5 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:31,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 741.0) internal successors, (4446), 6 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:31,272 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 741.0) internal successors, (4446), 6 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:31,272 INFO L175 Difference]: Start difference. First operand has 109 places, 132 transitions, 899 flow. Second operand 5 states and 1422 transitions. [2023-08-29 21:07:31,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 175 transitions, 1477 flow [2023-08-29 21:07:31,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 175 transitions, 1438 flow, removed 16 selfloop flow, removed 3 redundant places. [2023-08-29 21:07:31,291 INFO L231 Difference]: Finished difference. Result has 110 places, 134 transitions, 994 flow [2023-08-29 21:07:31,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=994, PETRI_PLACES=110, PETRI_TRANSITIONS=134} [2023-08-29 21:07:31,292 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 4 predicate places. [2023-08-29 21:07:31,292 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 134 transitions, 994 flow [2023-08-29 21:07:31,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 266.5) internal successors, (1066), 4 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:31,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:07:31,293 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:07:31,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-29 21:07:31,293 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting threadErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:07:31,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:07:31,294 INFO L85 PathProgramCache]: Analyzing trace with hash -606276603, now seen corresponding path program 1 times [2023-08-29 21:07:31,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:07:31,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120704409] [2023-08-29 21:07:31,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:07:31,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:07:31,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:07:31,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:07:31,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:07:31,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120704409] [2023-08-29 21:07:31,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120704409] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:07:31,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:07:31,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:07:31,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215327120] [2023-08-29 21:07:31,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:07:31,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:07:31,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:07:31,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:07:31,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:07:31,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 741 [2023-08-29 21:07:31,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 134 transitions, 994 flow. Second operand has 4 states, 4 states have (on average 269.5) internal successors, (1078), 4 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:31,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:07:31,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 741 [2023-08-29 21:07:31,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:07:32,344 INFO L130 PetriNetUnfolder]: 2146/5015 cut-off events. [2023-08-29 21:07:32,345 INFO L131 PetriNetUnfolder]: For 10383/10383 co-relation queries the response was YES. [2023-08-29 21:07:32,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16212 conditions, 5015 events. 2146/5015 cut-off events. For 10383/10383 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 36996 event pairs, 514 based on Foata normal form. 0/3840 useless extension candidates. Maximal degree in co-relation 16188. Up to 1951 conditions per place. [2023-08-29 21:07:32,373 INFO L137 encePairwiseOnDemand]: 731/741 looper letters, 140 selfloop transitions, 46 changer transitions 0/192 dead transitions. [2023-08-29 21:07:32,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 192 transitions, 1683 flow [2023-08-29 21:07:32,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:07:32,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:07:32,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1451 transitions. [2023-08-29 21:07:32,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3916329284750337 [2023-08-29 21:07:32,377 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1451 transitions. [2023-08-29 21:07:32,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1451 transitions. [2023-08-29 21:07:32,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:07:32,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1451 transitions. [2023-08-29 21:07:32,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 290.2) internal successors, (1451), 5 states have internal predecessors, (1451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:32,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 741.0) internal successors, (4446), 6 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:32,387 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 741.0) internal successors, (4446), 6 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:32,387 INFO L175 Difference]: Start difference. First operand has 110 places, 134 transitions, 994 flow. Second operand 5 states and 1451 transitions. [2023-08-29 21:07:32,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 192 transitions, 1683 flow [2023-08-29 21:07:32,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 192 transitions, 1581 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:07:32,406 INFO L231 Difference]: Finished difference. Result has 111 places, 140 transitions, 1062 flow [2023-08-29 21:07:32,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=904, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1062, PETRI_PLACES=111, PETRI_TRANSITIONS=140} [2023-08-29 21:07:32,407 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 5 predicate places. [2023-08-29 21:07:32,407 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 140 transitions, 1062 flow [2023-08-29 21:07:32,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 269.5) internal successors, (1078), 4 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:32,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:07:32,408 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:07:32,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-29 21:07:32,408 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting threadErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:07:32,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:07:32,408 INFO L85 PathProgramCache]: Analyzing trace with hash -606276508, now seen corresponding path program 1 times [2023-08-29 21:07:32,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:07:32,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686796451] [2023-08-29 21:07:32,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:07:32,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:07:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:07:32,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:07:32,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:07:32,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686796451] [2023-08-29 21:07:32,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686796451] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:07:32,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:07:32,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 21:07:32,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028461739] [2023-08-29 21:07:32,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:07:32,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:07:32,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:07:32,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:07:32,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:07:33,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 741 [2023-08-29 21:07:33,454 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 140 transitions, 1062 flow. Second operand has 7 states, 7 states have (on average 255.0) internal successors, (1785), 7 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:33,454 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:07:33,454 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 741 [2023-08-29 21:07:33,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:07:34,317 INFO L130 PetriNetUnfolder]: 2509/5631 cut-off events. [2023-08-29 21:07:34,317 INFO L131 PetriNetUnfolder]: For 11411/11411 co-relation queries the response was YES. [2023-08-29 21:07:34,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18160 conditions, 5631 events. 2509/5631 cut-off events. For 11411/11411 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 40269 event pairs, 355 based on Foata normal form. 0/4475 useless extension candidates. Maximal degree in co-relation 18135. Up to 2923 conditions per place. [2023-08-29 21:07:34,344 INFO L137 encePairwiseOnDemand]: 729/741 looper letters, 250 selfloop transitions, 43 changer transitions 1/298 dead transitions. [2023-08-29 21:07:34,344 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 298 transitions, 2422 flow [2023-08-29 21:07:34,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 21:07:34,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 21:07:34,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2477 transitions. [2023-08-29 21:07:34,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3714200029989504 [2023-08-29 21:07:34,350 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2477 transitions. [2023-08-29 21:07:34,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2477 transitions. [2023-08-29 21:07:34,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:07:34,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2477 transitions. [2023-08-29 21:07:34,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 275.22222222222223) internal successors, (2477), 9 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:34,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 741.0) internal successors, (7410), 10 states have internal predecessors, (7410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:34,362 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 741.0) internal successors, (7410), 10 states have internal predecessors, (7410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:34,362 INFO L175 Difference]: Start difference. First operand has 111 places, 140 transitions, 1062 flow. Second operand 9 states and 2477 transitions. [2023-08-29 21:07:34,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 298 transitions, 2422 flow [2023-08-29 21:07:34,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 298 transitions, 2364 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-29 21:07:34,386 INFO L231 Difference]: Finished difference. Result has 120 places, 154 transitions, 1192 flow [2023-08-29 21:07:34,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=1010, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1192, PETRI_PLACES=120, PETRI_TRANSITIONS=154} [2023-08-29 21:07:34,387 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 14 predicate places. [2023-08-29 21:07:34,387 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 154 transitions, 1192 flow [2023-08-29 21:07:34,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 255.0) internal successors, (1785), 7 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:34,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:07:34,388 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:07:34,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-29 21:07:34,388 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:07:34,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:07:34,388 INFO L85 PathProgramCache]: Analyzing trace with hash 413796138, now seen corresponding path program 1 times [2023-08-29 21:07:34,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:07:34,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011396873] [2023-08-29 21:07:34,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:07:34,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:07:34,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:07:34,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:07:34,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:07:34,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011396873] [2023-08-29 21:07:34,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011396873] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:07:34,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186214037] [2023-08-29 21:07:34,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:07:34,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:07:34,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:07:34,625 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) [2023-08-29 21:07:34,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-29 21:07:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:07:34,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 21:07:34,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:07:34,843 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-29 21:07:34,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-29 21:07:34,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-08-29 21:07:34,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-29 21:07:34,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:07:34,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186214037] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:07:34,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 21:07:34,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-29 21:07:34,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981236899] [2023-08-29 21:07:34,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:07:34,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:07:34,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:07:34,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:07:34,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-29 21:07:35,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 741 [2023-08-29 21:07:35,028 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 154 transitions, 1192 flow. Second operand has 5 states, 5 states have (on average 264.6) internal successors, (1323), 5 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:35,028 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:07:35,028 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 741 [2023-08-29 21:07:35,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:07:35,690 INFO L130 PetriNetUnfolder]: 2301/5291 cut-off events. [2023-08-29 21:07:35,690 INFO L131 PetriNetUnfolder]: For 11883/11883 co-relation queries the response was YES. [2023-08-29 21:07:35,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18077 conditions, 5291 events. 2301/5291 cut-off events. For 11883/11883 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 38029 event pairs, 580 based on Foata normal form. 79/4267 useless extension candidates. Maximal degree in co-relation 18049. Up to 2971 conditions per place. [2023-08-29 21:07:35,715 INFO L137 encePairwiseOnDemand]: 733/741 looper letters, 180 selfloop transitions, 31 changer transitions 1/218 dead transitions. [2023-08-29 21:07:35,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 218 transitions, 1911 flow [2023-08-29 21:07:35,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:07:35,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:07:35,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1440 transitions. [2023-08-29 21:07:35,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38866396761133604 [2023-08-29 21:07:35,720 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1440 transitions. [2023-08-29 21:07:35,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1440 transitions. [2023-08-29 21:07:35,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:07:35,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1440 transitions. [2023-08-29 21:07:35,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 288.0) internal successors, (1440), 5 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:35,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 741.0) internal successors, (4446), 6 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:35,727 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 741.0) internal successors, (4446), 6 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:35,727 INFO L175 Difference]: Start difference. First operand has 120 places, 154 transitions, 1192 flow. Second operand 5 states and 1440 transitions. [2023-08-29 21:07:35,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 218 transitions, 1911 flow [2023-08-29 21:07:35,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 218 transitions, 1855 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-29 21:07:35,753 INFO L231 Difference]: Finished difference. Result has 125 places, 154 transitions, 1268 flow [2023-08-29 21:07:35,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1268, PETRI_PLACES=125, PETRI_TRANSITIONS=154} [2023-08-29 21:07:35,753 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 19 predicate places. [2023-08-29 21:07:35,754 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 154 transitions, 1268 flow [2023-08-29 21:07:35,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 264.6) internal successors, (1323), 5 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:07:35,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:07:35,754 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:07:35,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-29 21:07:35,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:07:35,961 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting threadErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:07:35,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:07:35,961 INFO L85 PathProgramCache]: Analyzing trace with hash 9931233, now seen corresponding path program 1 times [2023-08-29 21:07:35,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:07:35,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716320734] [2023-08-29 21:07:35,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:07:35,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:07:36,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:07:37,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:07:37,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:07:37,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716320734] [2023-08-29 21:07:37,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716320734] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:07:37,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695230138] [2023-08-29 21:07:37,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:07:37,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:07:37,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:07:37,325 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) [2023-08-29 21:07:37,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-29 21:07:37,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:07:37,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 167 conjunts are in the unsatisfiable core [2023-08-29 21:07:37,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:07:37,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 8 [2023-08-29 21:07:37,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-29 21:07:37,570 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 18 [2023-08-29 21:07:37,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-08-29 21:07:37,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-08-29 21:07:37,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:07:37,693 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 21 treesize of output 21 [2023-08-29 21:07:37,808 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 0 case distinctions, treesize of input 33 treesize of output 24 [2023-08-29 21:07:38,003 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:07:38,005 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 1 case distinctions, treesize of input 26 treesize of output 21 [2023-08-29 21:07:38,013 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-29 21:07:38,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2023-08-29 21:07:38,108 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:07:38,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 31 [2023-08-29 21:07:38,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:07:38,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:07:38,440 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-29 21:07:38,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 113 [2023-08-29 21:07:38,461 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:07:38,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 164 [2023-08-29 21:08:08,614 WARN L222 SmtUtils]: Spent 29.27s on a formula simplification. DAG size of input: 79 DAG size of output: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 21:08:14,727 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:08:14,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695230138] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:08:14,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:08:14,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 11] total 30 [2023-08-29 21:08:14,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775425836] [2023-08-29 21:08:14,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:08:14,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-29 21:08:14,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:08:14,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-29 21:08:14,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=810, Unknown=21, NotChecked=0, Total=992 [2023-08-29 21:08:16,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 741 [2023-08-29 21:08:16,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 154 transitions, 1268 flow. Second operand has 32 states, 32 states have (on average 143.71875) internal successors, (4599), 32 states have internal predecessors, (4599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:08:16,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:08:16,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 741 [2023-08-29 21:08:16,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:08:34,108 INFO L130 PetriNetUnfolder]: 3102/6785 cut-off events. [2023-08-29 21:08:34,108 INFO L131 PetriNetUnfolder]: For 17954/17954 co-relation queries the response was YES. [2023-08-29 21:08:34,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24473 conditions, 6785 events. 3102/6785 cut-off events. For 17954/17954 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 49371 event pairs, 1239 based on Foata normal form. 15/5519 useless extension candidates. Maximal degree in co-relation 24441. Up to 4854 conditions per place. [2023-08-29 21:08:34,140 INFO L137 encePairwiseOnDemand]: 719/741 looper letters, 259 selfloop transitions, 111 changer transitions 1/372 dead transitions. [2023-08-29 21:08:34,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 372 transitions, 3395 flow [2023-08-29 21:08:34,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-29 21:08:34,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-29 21:08:34,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5525 transitions. [2023-08-29 21:08:34,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.20151730678046467 [2023-08-29 21:08:34,152 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5525 transitions. [2023-08-29 21:08:34,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5525 transitions. [2023-08-29 21:08:34,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:08:34,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5525 transitions. [2023-08-29 21:08:34,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 149.32432432432432) internal successors, (5525), 37 states have internal predecessors, (5525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:08:34,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 741.0) internal successors, (28158), 38 states have internal predecessors, (28158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:08:34,188 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 741.0) internal successors, (28158), 38 states have internal predecessors, (28158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:08:34,188 INFO L175 Difference]: Start difference. First operand has 125 places, 154 transitions, 1268 flow. Second operand 37 states and 5525 transitions. [2023-08-29 21:08:34,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 372 transitions, 3395 flow [2023-08-29 21:08:34,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 372 transitions, 3303 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 21:08:34,223 INFO L231 Difference]: Finished difference. Result has 172 places, 257 transitions, 2361 flow [2023-08-29 21:08:34,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=1206, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2361, PETRI_PLACES=172, PETRI_TRANSITIONS=257} [2023-08-29 21:08:34,224 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 66 predicate places. [2023-08-29 21:08:34,224 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 257 transitions, 2361 flow [2023-08-29 21:08:34,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 143.71875) internal successors, (4599), 32 states have internal predecessors, (4599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:08:34,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:08:34,226 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:08:34,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-29 21:08:34,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:08:34,432 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting threadErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:08:34,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:08:34,433 INFO L85 PathProgramCache]: Analyzing trace with hash 10536296, now seen corresponding path program 1 times [2023-08-29 21:08:34,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:08:34,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312499105] [2023-08-29 21:08:34,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:08:34,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:08:34,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:08:34,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:08:34,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:08:34,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312499105] [2023-08-29 21:08:34,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312499105] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:08:34,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:08:34,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-29 21:08:34,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618309059] [2023-08-29 21:08:34,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:08:34,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 21:08:34,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:08:34,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 21:08:34,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-08-29 21:08:36,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 741 [2023-08-29 21:08:36,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 257 transitions, 2361 flow. Second operand has 9 states, 9 states have (on average 257.0) internal successors, (2313), 9 states have internal predecessors, (2313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:08:36,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:08:36,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 741 [2023-08-29 21:08:36,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:08:37,829 INFO L130 PetriNetUnfolder]: 3261/7278 cut-off events. [2023-08-29 21:08:37,830 INFO L131 PetriNetUnfolder]: For 26445/26445 co-relation queries the response was YES. [2023-08-29 21:08:37,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30893 conditions, 7278 events. 3261/7278 cut-off events. For 26445/26445 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 54415 event pairs, 1547 based on Foata normal form. 8/6356 useless extension candidates. Maximal degree in co-relation 30846. Up to 5819 conditions per place. [2023-08-29 21:08:37,866 INFO L137 encePairwiseOnDemand]: 725/741 looper letters, 301 selfloop transitions, 100 changer transitions 1/406 dead transitions. [2023-08-29 21:08:37,867 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 406 transitions, 4373 flow [2023-08-29 21:08:37,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-29 21:08:37,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-29 21:08:37,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 4257 transitions. [2023-08-29 21:08:37,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3590587044534413 [2023-08-29 21:08:37,873 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 4257 transitions. [2023-08-29 21:08:37,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 4257 transitions. [2023-08-29 21:08:37,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:08:37,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 4257 transitions. [2023-08-29 21:08:37,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 266.0625) internal successors, (4257), 16 states have internal predecessors, (4257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:08:37,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 741.0) internal successors, (12597), 17 states have internal predecessors, (12597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:08:37,886 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 741.0) internal successors, (12597), 17 states have internal predecessors, (12597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:08:37,886 INFO L175 Difference]: Start difference. First operand has 172 places, 257 transitions, 2361 flow. Second operand 16 states and 4257 transitions. [2023-08-29 21:08:37,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 406 transitions, 4373 flow [2023-08-29 21:08:37,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 406 transitions, 4234 flow, removed 28 selfloop flow, removed 3 redundant places. [2023-08-29 21:08:37,971 INFO L231 Difference]: Finished difference. Result has 191 places, 298 transitions, 3036 flow [2023-08-29 21:08:37,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=2281, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3036, PETRI_PLACES=191, PETRI_TRANSITIONS=298} [2023-08-29 21:08:37,971 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 85 predicate places. [2023-08-29 21:08:37,972 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 298 transitions, 3036 flow [2023-08-29 21:08:37,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 257.0) internal successors, (2313), 9 states have internal predecessors, (2313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:08:37,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:08:37,972 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:08:37,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-29 21:08:37,973 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting threadErr32ASSERT_VIOLATIONMEMORY_LEAK === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:08:37,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:08:37,973 INFO L85 PathProgramCache]: Analyzing trace with hash 326626425, now seen corresponding path program 1 times [2023-08-29 21:08:37,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:08:37,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742077068] [2023-08-29 21:08:37,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:08:37,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:08:37,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:08:38,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:08:38,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:08:38,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742077068] [2023-08-29 21:08:38,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742077068] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:08:38,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:08:38,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:08:38,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039521927] [2023-08-29 21:08:38,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:08:38,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:08:38,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:08:38,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:08:38,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:08:38,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 741 [2023-08-29 21:08:38,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 298 transitions, 3036 flow. Second operand has 3 states, 3 states have (on average 267.3333333333333) internal successors, (802), 3 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:08:38,175 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:08:38,176 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 741 [2023-08-29 21:08:38,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:08:39,374 INFO L130 PetriNetUnfolder]: 3215/7266 cut-off events. [2023-08-29 21:08:39,375 INFO L131 PetriNetUnfolder]: For 31118/31118 co-relation queries the response was YES. [2023-08-29 21:08:39,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31986 conditions, 7266 events. 3215/7266 cut-off events. For 31118/31118 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 55519 event pairs, 1493 based on Foata normal form. 0/6288 useless extension candidates. Maximal degree in co-relation 31931. Up to 6298 conditions per place. [2023-08-29 21:08:39,415 INFO L137 encePairwiseOnDemand]: 735/741 looper letters, 313 selfloop transitions, 7 changer transitions 0/325 dead transitions. [2023-08-29 21:08:39,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 325 transitions, 3824 flow [2023-08-29 21:08:39,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:08:39,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:08:39,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 874 transitions. [2023-08-29 21:08:39,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39316239316239315 [2023-08-29 21:08:39,417 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 874 transitions. [2023-08-29 21:08:39,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 874 transitions. [2023-08-29 21:08:39,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:08:39,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 874 transitions. [2023-08-29 21:08:39,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 291.3333333333333) internal successors, (874), 3 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:08:39,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 741.0) internal successors, (2964), 4 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:08:39,421 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 741.0) internal successors, (2964), 4 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:08:39,421 INFO L175 Difference]: Start difference. First operand has 191 places, 298 transitions, 3036 flow. Second operand 3 states and 874 transitions. [2023-08-29 21:08:39,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 325 transitions, 3824 flow [2023-08-29 21:08:39,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 325 transitions, 3786 flow, removed 13 selfloop flow, removed 1 redundant places. [2023-08-29 21:08:39,522 INFO L231 Difference]: Finished difference. Result has 194 places, 303 transitions, 3071 flow [2023-08-29 21:08:39,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=2998, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3071, PETRI_PLACES=194, PETRI_TRANSITIONS=303} [2023-08-29 21:08:39,523 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 88 predicate places. [2023-08-29 21:08:39,523 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 303 transitions, 3071 flow [2023-08-29 21:08:39,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 267.3333333333333) internal successors, (802), 3 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:08:39,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:08:39,524 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:08:39,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-29 21:08:39,524 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting threadErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:08:39,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:08:39,524 INFO L85 PathProgramCache]: Analyzing trace with hash -382563135, now seen corresponding path program 1 times [2023-08-29 21:08:39,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:08:39,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410887918] [2023-08-29 21:08:39,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:08:39,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:08:39,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:08:40,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:08:40,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:08:40,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410887918] [2023-08-29 21:08:40,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410887918] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:08:40,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:08:40,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-29 21:08:40,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749243513] [2023-08-29 21:08:40,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:08:40,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 21:08:40,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:08:40,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 21:08:40,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-08-29 21:08:40,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 741 [2023-08-29 21:08:40,727 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 303 transitions, 3071 flow. Second operand has 9 states, 9 states have (on average 250.22222222222223) internal successors, (2252), 9 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:08:40,727 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:08:40,727 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 741 [2023-08-29 21:08:40,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:08:42,059 INFO L130 PetriNetUnfolder]: 2342/5774 cut-off events. [2023-08-29 21:08:42,059 INFO L131 PetriNetUnfolder]: For 23138/23138 co-relation queries the response was YES. [2023-08-29 21:08:42,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24317 conditions, 5774 events. 2342/5774 cut-off events. For 23138/23138 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 44695 event pairs, 761 based on Foata normal form. 129/5005 useless extension candidates. Maximal degree in co-relation 24260. Up to 2631 conditions per place. [2023-08-29 21:08:42,088 INFO L137 encePairwiseOnDemand]: 723/741 looper letters, 318 selfloop transitions, 59 changer transitions 1/383 dead transitions. [2023-08-29 21:08:42,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 383 transitions, 4301 flow [2023-08-29 21:08:42,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 21:08:42,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 21:08:42,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1895 transitions. [2023-08-29 21:08:42,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36533641796799693 [2023-08-29 21:08:42,092 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1895 transitions. [2023-08-29 21:08:42,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1895 transitions. [2023-08-29 21:08:42,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:08:42,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1895 transitions. [2023-08-29 21:08:42,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 270.7142857142857) internal successors, (1895), 7 states have internal predecessors, (1895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:08:42,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 741.0) internal successors, (5928), 8 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:08:42,098 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 741.0) internal successors, (5928), 8 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:08:42,098 INFO L175 Difference]: Start difference. First operand has 194 places, 303 transitions, 3071 flow. Second operand 7 states and 1895 transitions. [2023-08-29 21:08:42,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 383 transitions, 4301 flow [2023-08-29 21:08:42,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 383 transitions, 4167 flow, removed 56 selfloop flow, removed 9 redundant places. [2023-08-29 21:08:42,164 INFO L231 Difference]: Finished difference. Result has 184 places, 280 transitions, 2848 flow [2023-08-29 21:08:42,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=2502, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2848, PETRI_PLACES=184, PETRI_TRANSITIONS=280} [2023-08-29 21:08:42,164 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 78 predicate places. [2023-08-29 21:08:42,165 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 280 transitions, 2848 flow [2023-08-29 21:08:42,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 250.22222222222223) internal successors, (2252), 9 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:08:42,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:08:42,165 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:08:42,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-29 21:08:42,166 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting threadErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:08:42,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:08:42,166 INFO L85 PathProgramCache]: Analyzing trace with hash -2102690779, now seen corresponding path program 2 times [2023-08-29 21:08:42,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:08:42,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376901071] [2023-08-29 21:08:42,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:08:42,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:08:42,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:08:43,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:08:43,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:08:43,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376901071] [2023-08-29 21:08:43,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376901071] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:08:43,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841244243] [2023-08-29 21:08:43,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 21:08:43,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:08:43,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:08:43,525 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) [2023-08-29 21:08:43,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-29 21:08:43,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 21:08:43,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 21:08:43,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 101 conjunts are in the unsatisfiable core [2023-08-29 21:08:43,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:08:43,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-08-29 21:08:43,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:08:43,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:08:43,842 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 18 [2023-08-29 21:08:43,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:08:43,909 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 18 [2023-08-29 21:08:43,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:08:43,962 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 18 [2023-08-29 21:08:43,997 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 14 treesize of output 16 [2023-08-29 21:08:44,144 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 21:08:44,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2023-08-29 21:08:44,201 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 21:08:44,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-29 21:08:44,289 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-29 21:08:44,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 28 [2023-08-29 21:08:44,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:08:44,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:08:44,516 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-29 21:08:44,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 116 [2023-08-29 21:08:44,528 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:08:44,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 117 [2023-08-29 21:08:46,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:08:46,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841244243] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:08:46,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:08:46,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 12] total 32 [2023-08-29 21:08:46,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711779217] [2023-08-29 21:08:46,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:08:46,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-29 21:08:46,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:08:46,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-29 21:08:46,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=921, Unknown=22, NotChecked=0, Total=1056 [2023-08-29 21:08:48,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 741 [2023-08-29 21:08:48,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 280 transitions, 2848 flow. Second operand has 33 states, 33 states have (on average 152.78787878787878) internal successors, (5042), 33 states have internal predecessors, (5042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:08:48,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:08:48,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 741 [2023-08-29 21:08:48,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:08:56,452 INFO L130 PetriNetUnfolder]: 2488/5998 cut-off events. [2023-08-29 21:08:56,452 INFO L131 PetriNetUnfolder]: For 21972/21972 co-relation queries the response was YES. [2023-08-29 21:08:56,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25428 conditions, 5998 events. 2488/5998 cut-off events. For 21972/21972 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 45575 event pairs, 625 based on Foata normal form. 2/4959 useless extension candidates. Maximal degree in co-relation 25375. Up to 2076 conditions per place. [2023-08-29 21:08:56,484 INFO L137 encePairwiseOnDemand]: 716/741 looper letters, 392 selfloop transitions, 95 changer transitions 1/489 dead transitions. [2023-08-29 21:08:56,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 489 transitions, 5232 flow [2023-08-29 21:08:56,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-29 21:08:56,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-29 21:08:56,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3431 transitions. [2023-08-29 21:08:56,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.22048711522395734 [2023-08-29 21:08:56,490 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3431 transitions. [2023-08-29 21:08:56,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3431 transitions. [2023-08-29 21:08:56,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:08:56,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3431 transitions. [2023-08-29 21:08:56,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 163.38095238095238) internal successors, (3431), 21 states have internal predecessors, (3431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:08:56,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 741.0) internal successors, (16302), 22 states have internal predecessors, (16302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:08:56,504 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 741.0) internal successors, (16302), 22 states have internal predecessors, (16302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:08:56,504 INFO L175 Difference]: Start difference. First operand has 184 places, 280 transitions, 2848 flow. Second operand 21 states and 3431 transitions. [2023-08-29 21:08:56,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 489 transitions, 5232 flow [2023-08-29 21:08:56,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 489 transitions, 5163 flow, removed 23 selfloop flow, removed 3 redundant places. [2023-08-29 21:08:56,574 INFO L231 Difference]: Finished difference. Result has 207 places, 308 transitions, 3326 flow [2023-08-29 21:08:56,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=2698, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3326, PETRI_PLACES=207, PETRI_TRANSITIONS=308} [2023-08-29 21:08:56,575 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 101 predicate places. [2023-08-29 21:08:56,575 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 308 transitions, 3326 flow [2023-08-29 21:08:56,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 152.78787878787878) internal successors, (5042), 33 states have internal predecessors, (5042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:08:56,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:08:56,576 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] [2023-08-29 21:08:56,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-29 21:08:56,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-29 21:08:56,788 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting threadErr32ASSERT_VIOLATIONMEMORY_LEAK === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:08:56,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:08:56,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1426449561, now seen corresponding path program 1 times [2023-08-29 21:08:56,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:08:56,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797290149] [2023-08-29 21:08:56,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:08:56,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:08:56,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:08:56,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:08:56,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:08:56,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797290149] [2023-08-29 21:08:56,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797290149] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:08:56,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:08:56,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 21:08:56,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057633782] [2023-08-29 21:08:56,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:08:56,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 21:08:56,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:08:56,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 21:08:56,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-29 21:08:57,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 741 [2023-08-29 21:08:57,369 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 308 transitions, 3326 flow. Second operand has 6 states, 6 states have (on average 261.5) internal successors, (1569), 6 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:08:57,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:08:57,370 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 741 [2023-08-29 21:08:57,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:08:58,523 INFO L130 PetriNetUnfolder]: 2338/5830 cut-off events. [2023-08-29 21:08:58,523 INFO L131 PetriNetUnfolder]: For 23631/23631 co-relation queries the response was YES. [2023-08-29 21:08:58,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25806 conditions, 5830 events. 2338/5830 cut-off events. For 23631/23631 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 46121 event pairs, 671 based on Foata normal form. 0/4926 useless extension candidates. Maximal degree in co-relation 25748. Up to 4744 conditions per place. [2023-08-29 21:08:58,563 INFO L137 encePairwiseOnDemand]: 736/741 looper letters, 304 selfloop transitions, 12 changer transitions 0/321 dead transitions. [2023-08-29 21:08:58,563 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 321 transitions, 4033 flow [2023-08-29 21:08:58,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:08:58,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:08:58,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1116 transitions. [2023-08-29 21:08:58,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3765182186234818 [2023-08-29 21:08:58,565 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1116 transitions. [2023-08-29 21:08:58,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1116 transitions. [2023-08-29 21:08:58,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:08:58,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1116 transitions. [2023-08-29 21:08:58,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 279.0) internal successors, (1116), 4 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:08:58,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 741.0) internal successors, (3705), 5 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:08:58,569 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 741.0) internal successors, (3705), 5 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:08:58,569 INFO L175 Difference]: Start difference. First operand has 207 places, 308 transitions, 3326 flow. Second operand 4 states and 1116 transitions. [2023-08-29 21:08:58,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 321 transitions, 4033 flow [2023-08-29 21:08:58,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 321 transitions, 3925 flow, removed 25 selfloop flow, removed 7 redundant places. [2023-08-29 21:08:58,646 INFO L231 Difference]: Finished difference. Result has 202 places, 307 transitions, 3238 flow [2023-08-29 21:08:58,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=3214, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3238, PETRI_PLACES=202, PETRI_TRANSITIONS=307} [2023-08-29 21:08:58,646 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 96 predicate places. [2023-08-29 21:08:58,646 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 307 transitions, 3238 flow [2023-08-29 21:08:58,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 261.5) internal successors, (1569), 6 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:08:58,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:08:58,647 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] [2023-08-29 21:08:58,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-29 21:08:58,647 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting threadErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:08:58,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:08:58,647 INFO L85 PathProgramCache]: Analyzing trace with hash 355454510, now seen corresponding path program 1 times [2023-08-29 21:08:58,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:08:58,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000912686] [2023-08-29 21:08:58,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:08:58,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:08:58,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:08:58,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:08:58,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:08:58,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000912686] [2023-08-29 21:08:58,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000912686] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:08:58,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:08:58,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:08:58,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021171821] [2023-08-29 21:08:58,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:08:58,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:08:58,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:08:58,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:08:58,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:08:58,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 741 [2023-08-29 21:08:58,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 307 transitions, 3238 flow. Second operand has 4 states, 4 states have (on average 266.25) internal successors, (1065), 4 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:08:58,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:08:58,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 741 [2023-08-29 21:08:58,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:09:00,237 INFO L130 PetriNetUnfolder]: 2288/5579 cut-off events. [2023-08-29 21:09:00,237 INFO L131 PetriNetUnfolder]: For 22661/22661 co-relation queries the response was YES. [2023-08-29 21:09:00,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24245 conditions, 5579 events. 2288/5579 cut-off events. For 22661/22661 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 42519 event pairs, 939 based on Foata normal form. 261/5004 useless extension candidates. Maximal degree in co-relation 24186. Up to 4272 conditions per place. [2023-08-29 21:09:00,280 INFO L137 encePairwiseOnDemand]: 725/741 looper letters, 279 selfloop transitions, 44 changer transitions 1/328 dead transitions. [2023-08-29 21:09:00,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 328 transitions, 3930 flow [2023-08-29 21:09:00,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:09:00,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:09:00,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1145 transitions. [2023-08-29 21:09:00,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38630229419703105 [2023-08-29 21:09:00,282 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1145 transitions. [2023-08-29 21:09:00,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1145 transitions. [2023-08-29 21:09:00,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:09:00,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1145 transitions. [2023-08-29 21:09:00,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 286.25) internal successors, (1145), 4 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:00,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 741.0) internal successors, (3705), 5 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:00,285 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 741.0) internal successors, (3705), 5 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:00,286 INFO L175 Difference]: Start difference. First operand has 202 places, 307 transitions, 3238 flow. Second operand 4 states and 1145 transitions. [2023-08-29 21:09:00,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 328 transitions, 3930 flow [2023-08-29 21:09:00,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 328 transitions, 3894 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-08-29 21:09:00,362 INFO L231 Difference]: Finished difference. Result has 197 places, 291 transitions, 3172 flow [2023-08-29 21:09:00,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=2938, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3172, PETRI_PLACES=197, PETRI_TRANSITIONS=291} [2023-08-29 21:09:00,362 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 91 predicate places. [2023-08-29 21:09:00,362 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 291 transitions, 3172 flow [2023-08-29 21:09:00,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 266.25) internal successors, (1065), 4 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:00,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:09:00,363 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] [2023-08-29 21:09:00,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-29 21:09:00,363 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting threadErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:09:00,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:09:00,363 INFO L85 PathProgramCache]: Analyzing trace with hash 355454509, now seen corresponding path program 1 times [2023-08-29 21:09:00,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:09:00,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888687509] [2023-08-29 21:09:00,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:09:00,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:09:00,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:09:00,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:09:00,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:09:00,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888687509] [2023-08-29 21:09:00,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888687509] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:09:00,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:09:00,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-29 21:09:00,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654783064] [2023-08-29 21:09:00,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:09:00,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 21:09:00,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:09:00,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 21:09:00,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:09:01,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 741 [2023-08-29 21:09:01,461 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 291 transitions, 3172 flow. Second operand has 8 states, 8 states have (on average 257.625) internal successors, (2061), 8 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:01,461 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:09:01,461 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 741 [2023-08-29 21:09:01,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:09:02,521 INFO L130 PetriNetUnfolder]: 1990/4838 cut-off events. [2023-08-29 21:09:02,521 INFO L131 PetriNetUnfolder]: For 22931/22931 co-relation queries the response was YES. [2023-08-29 21:09:02,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21953 conditions, 4838 events. 1990/4838 cut-off events. For 22931/22931 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 35331 event pairs, 499 based on Foata normal form. 410/4508 useless extension candidates. Maximal degree in co-relation 21894. Up to 1629 conditions per place. [2023-08-29 21:09:02,562 INFO L137 encePairwiseOnDemand]: 717/741 looper letters, 206 selfloop transitions, 142 changer transitions 1/354 dead transitions. [2023-08-29 21:09:02,562 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 354 transitions, 4266 flow [2023-08-29 21:09:02,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 21:09:02,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 21:09:02,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2698 transitions. [2023-08-29 21:09:02,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3641025641025641 [2023-08-29 21:09:02,566 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2698 transitions. [2023-08-29 21:09:02,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2698 transitions. [2023-08-29 21:09:02,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:09:02,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2698 transitions. [2023-08-29 21:09:02,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 269.8) internal successors, (2698), 10 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:02,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 741.0) internal successors, (8151), 11 states have internal predecessors, (8151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:02,574 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 741.0) internal successors, (8151), 11 states have internal predecessors, (8151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:02,574 INFO L175 Difference]: Start difference. First operand has 197 places, 291 transitions, 3172 flow. Second operand 10 states and 2698 transitions. [2023-08-29 21:09:02,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 354 transitions, 4266 flow [2023-08-29 21:09:02,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 354 transitions, 4233 flow, removed 14 selfloop flow, removed 2 redundant places. [2023-08-29 21:09:02,640 INFO L231 Difference]: Finished difference. Result has 193 places, 271 transitions, 3291 flow [2023-08-29 21:09:02,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=2904, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3291, PETRI_PLACES=193, PETRI_TRANSITIONS=271} [2023-08-29 21:09:02,640 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 87 predicate places. [2023-08-29 21:09:02,640 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 271 transitions, 3291 flow [2023-08-29 21:09:02,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 257.625) internal successors, (2061), 8 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:02,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:09:02,641 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:09:02,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-29 21:09:02,641 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting threadErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:09:02,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:09:02,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1989042393, now seen corresponding path program 1 times [2023-08-29 21:09:02,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:09:02,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319578503] [2023-08-29 21:09:02,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:09:02,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:09:02,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:09:02,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:09:02,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:09:02,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319578503] [2023-08-29 21:09:02,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319578503] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:09:02,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008019185] [2023-08-29 21:09:02,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:09:02,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:09:02,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:09:02,794 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) [2023-08-29 21:09:02,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-29 21:09:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:09:02,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 21:09:02,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:09:03,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:09:03,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:09:03,050 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:09:03,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008019185] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:09:03,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:09:03,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2023-08-29 21:09:03,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759700742] [2023-08-29 21:09:03,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:09:03,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 21:09:03,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:09:03,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 21:09:03,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:09:03,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 741 [2023-08-29 21:09:03,236 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 271 transitions, 3291 flow. Second operand has 8 states, 8 states have (on average 265.25) internal successors, (2122), 8 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:03,236 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:09:03,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 741 [2023-08-29 21:09:03,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:09:03,815 INFO L130 PetriNetUnfolder]: 1095/2740 cut-off events. [2023-08-29 21:09:03,815 INFO L131 PetriNetUnfolder]: For 13483/13483 co-relation queries the response was YES. [2023-08-29 21:09:03,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13225 conditions, 2740 events. 1095/2740 cut-off events. For 13483/13483 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 16851 event pairs, 357 based on Foata normal form. 28/2307 useless extension candidates. Maximal degree in co-relation 13166. Up to 1101 conditions per place. [2023-08-29 21:09:03,833 INFO L137 encePairwiseOnDemand]: 732/741 looper letters, 194 selfloop transitions, 71 changer transitions 1/271 dead transitions. [2023-08-29 21:09:03,833 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 271 transitions, 3477 flow [2023-08-29 21:09:03,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:09:03,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:09:03,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1663 transitions. [2023-08-29 21:09:03,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37404408457040034 [2023-08-29 21:09:03,835 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1663 transitions. [2023-08-29 21:09:03,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1663 transitions. [2023-08-29 21:09:03,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:09:03,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1663 transitions. [2023-08-29 21:09:03,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 277.1666666666667) internal successors, (1663), 6 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:03,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 741.0) internal successors, (5187), 7 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:03,839 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 741.0) internal successors, (5187), 7 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:03,839 INFO L175 Difference]: Start difference. First operand has 193 places, 271 transitions, 3291 flow. Second operand 6 states and 1663 transitions. [2023-08-29 21:09:03,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 271 transitions, 3477 flow [2023-08-29 21:09:03,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 271 transitions, 3118 flow, removed 38 selfloop flow, removed 16 redundant places. [2023-08-29 21:09:03,876 INFO L231 Difference]: Finished difference. Result has 182 places, 226 transitions, 2516 flow [2023-08-29 21:09:03,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=2261, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2516, PETRI_PLACES=182, PETRI_TRANSITIONS=226} [2023-08-29 21:09:03,876 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 76 predicate places. [2023-08-29 21:09:03,877 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 226 transitions, 2516 flow [2023-08-29 21:09:03,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 265.25) internal successors, (2122), 8 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:03,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:09:03,877 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] [2023-08-29 21:09:03,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-29 21:09:04,081 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,SelfDestructingSolverStorable27 [2023-08-29 21:09:04,081 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:09:04,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:09:04,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1270206247, now seen corresponding path program 1 times [2023-08-29 21:09:04,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:09:04,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845745460] [2023-08-29 21:09:04,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:09:04,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:09:04,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:09:04,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:09:04,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:09:04,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845745460] [2023-08-29 21:09:04,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845745460] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:09:04,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957114969] [2023-08-29 21:09:04,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:09:04,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:09:04,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:09:04,497 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) [2023-08-29 21:09:04,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-29 21:09:04,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:09:04,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-29 21:09:04,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:09:04,849 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-29 21:09:04,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-29 21:09:04,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-08-29 21:09:04,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-08-29 21:09:05,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:09:05,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-08-29 21:09:05,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:09:05,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:09:08,287 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~i~2#1| 4))) (and (forall ((v_ArrVal_775 Int) (|v_threadThread1of1ForFork0_Push_~#head1~1#1.base_87| Int)) (or (forall ((v_ArrVal_776 Int)) (<= (+ .cse0 |c_~#threads~0.offset| 4) (select (store |c_#length| |v_threadThread1of1ForFork0_Push_~#head1~1#1.base_87| v_ArrVal_776) |c_~#threads~0.base|))) (not (= (select (store |c_#valid| |c_threadThread1of1ForFork0_Pop_~#head2~0#1.base| v_ArrVal_775) |v_threadThread1of1ForFork0_Push_~#head1~1#1.base_87|) 0)))) (or (<= 0 (+ .cse0 |c_~#threads~0.offset|)) (forall ((v_ArrVal_775 Int) (|v_threadThread1of1ForFork0_Push_~#head1~1#1.base_87| Int)) (not (= (select (store |c_#valid| |c_threadThread1of1ForFork0_Pop_~#head2~0#1.base| v_ArrVal_775) |v_threadThread1of1ForFork0_Push_~#head1~1#1.base_87|) 0)))))) is different from false [2023-08-29 21:09:10,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:09:10,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957114969] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:09:10,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:09:10,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 16 [2023-08-29 21:09:10,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687379084] [2023-08-29 21:09:10,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:09:10,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-29 21:09:10,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:09:10,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-29 21:09:10,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=195, Unknown=1, NotChecked=30, Total=306 [2023-08-29 21:09:10,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 741 [2023-08-29 21:09:10,778 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 226 transitions, 2516 flow. Second operand has 18 states, 18 states have (on average 186.66666666666666) internal successors, (3360), 18 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:10,778 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:09:10,778 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 741 [2023-08-29 21:09:10,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:09:20,914 WARN L222 SmtUtils]: Spent 8.92s on a formula simplification. DAG size of input: 37 DAG size of output: 26 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 21:09:21,713 INFO L130 PetriNetUnfolder]: 1174/3011 cut-off events. [2023-08-29 21:09:21,713 INFO L131 PetriNetUnfolder]: For 16592/16592 co-relation queries the response was YES. [2023-08-29 21:09:21,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14781 conditions, 3011 events. 1174/3011 cut-off events. For 16592/16592 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 19471 event pairs, 274 based on Foata normal form. 82/2614 useless extension candidates. Maximal degree in co-relation 14727. Up to 1392 conditions per place. [2023-08-29 21:09:21,731 INFO L137 encePairwiseOnDemand]: 727/741 looper letters, 381 selfloop transitions, 81 changer transitions 2/465 dead transitions. [2023-08-29 21:09:21,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 465 transitions, 5641 flow [2023-08-29 21:09:21,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 21:09:21,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 21:09:21,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2416 transitions. [2023-08-29 21:09:21,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27170490328385066 [2023-08-29 21:09:21,736 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2416 transitions. [2023-08-29 21:09:21,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2416 transitions. [2023-08-29 21:09:21,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:09:21,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2416 transitions. [2023-08-29 21:09:21,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 201.33333333333334) internal successors, (2416), 12 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:21,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 741.0) internal successors, (9633), 13 states have internal predecessors, (9633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:21,744 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 741.0) internal successors, (9633), 13 states have internal predecessors, (9633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:21,745 INFO L175 Difference]: Start difference. First operand has 182 places, 226 transitions, 2516 flow. Second operand 12 states and 2416 transitions. [2023-08-29 21:09:21,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 465 transitions, 5641 flow [2023-08-29 21:09:21,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 465 transitions, 5446 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-29 21:09:21,780 INFO L231 Difference]: Finished difference. Result has 193 places, 256 transitions, 3187 flow [2023-08-29 21:09:21,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=2399, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3187, PETRI_PLACES=193, PETRI_TRANSITIONS=256} [2023-08-29 21:09:21,781 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 87 predicate places. [2023-08-29 21:09:21,781 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 256 transitions, 3187 flow [2023-08-29 21:09:21,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 186.66666666666666) internal successors, (3360), 18 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:21,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:09:21,782 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] [2023-08-29 21:09:21,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-29 21:09:21,983 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,SelfDestructingSolverStorable28 [2023-08-29 21:09:21,983 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting threadErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:09:21,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:09:21,983 INFO L85 PathProgramCache]: Analyzing trace with hash -2005488237, now seen corresponding path program 1 times [2023-08-29 21:09:21,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:09:21,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912186554] [2023-08-29 21:09:21,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:09:21,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:09:22,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:09:22,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:09:22,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:09:22,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912186554] [2023-08-29 21:09:22,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912186554] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:09:22,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:09:22,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:09:22,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596993872] [2023-08-29 21:09:22,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:09:22,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:09:22,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:09:22,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:09:22,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:09:22,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 741 [2023-08-29 21:09:22,137 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 256 transitions, 3187 flow. Second operand has 3 states, 3 states have (on average 271.3333333333333) internal successors, (814), 3 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:22,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:09:22,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 741 [2023-08-29 21:09:22,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:09:22,649 INFO L130 PetriNetUnfolder]: 1090/2832 cut-off events. [2023-08-29 21:09:22,649 INFO L131 PetriNetUnfolder]: For 18098/18098 co-relation queries the response was YES. [2023-08-29 21:09:22,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14428 conditions, 2832 events. 1090/2832 cut-off events. For 18098/18098 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 18003 event pairs, 467 based on Foata normal form. 0/2422 useless extension candidates. Maximal degree in co-relation 14373. Up to 2018 conditions per place. [2023-08-29 21:09:22,672 INFO L137 encePairwiseOnDemand]: 738/741 looper letters, 246 selfloop transitions, 16 changer transitions 0/268 dead transitions. [2023-08-29 21:09:22,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 268 transitions, 3817 flow [2023-08-29 21:09:22,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:09:22,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:09:22,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 857 transitions. [2023-08-29 21:09:22,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.385515069725596 [2023-08-29 21:09:22,674 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 857 transitions. [2023-08-29 21:09:22,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 857 transitions. [2023-08-29 21:09:22,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:09:22,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 857 transitions. [2023-08-29 21:09:22,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 285.6666666666667) internal successors, (857), 3 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:22,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 741.0) internal successors, (2964), 4 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:22,676 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 741.0) internal successors, (2964), 4 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:22,676 INFO L175 Difference]: Start difference. First operand has 193 places, 256 transitions, 3187 flow. Second operand 3 states and 857 transitions. [2023-08-29 21:09:22,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 268 transitions, 3817 flow [2023-08-29 21:09:22,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 268 transitions, 3786 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-08-29 21:09:22,718 INFO L231 Difference]: Finished difference. Result has 192 places, 255 transitions, 3186 flow [2023-08-29 21:09:22,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=3154, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3186, PETRI_PLACES=192, PETRI_TRANSITIONS=255} [2023-08-29 21:09:22,719 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 86 predicate places. [2023-08-29 21:09:22,719 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 255 transitions, 3186 flow [2023-08-29 21:09:22,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 271.3333333333333) internal successors, (814), 3 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:22,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:09:22,719 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] [2023-08-29 21:09:22,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-29 21:09:22,719 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting threadErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:09:22,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:09:22,720 INFO L85 PathProgramCache]: Analyzing trace with hash -2005488236, now seen corresponding path program 1 times [2023-08-29 21:09:22,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:09:22,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463461165] [2023-08-29 21:09:22,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:09:22,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:09:22,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:09:22,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:09:22,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:09:22,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463461165] [2023-08-29 21:09:22,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463461165] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:09:22,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:09:22,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:09:22,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997311489] [2023-08-29 21:09:22,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:09:22,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:09:22,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:09:22,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:09:22,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:09:22,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 741 [2023-08-29 21:09:22,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 255 transitions, 3186 flow. Second operand has 3 states, 3 states have (on average 275.3333333333333) internal successors, (826), 3 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:22,892 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:09:22,892 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 741 [2023-08-29 21:09:22,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:09:23,419 INFO L130 PetriNetUnfolder]: 1090/2780 cut-off events. [2023-08-29 21:09:23,419 INFO L131 PetriNetUnfolder]: For 17630/17630 co-relation queries the response was YES. [2023-08-29 21:09:23,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14352 conditions, 2780 events. 1090/2780 cut-off events. For 17630/17630 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 17448 event pairs, 467 based on Foata normal form. 0/2370 useless extension candidates. Maximal degree in co-relation 14296. Up to 2018 conditions per place. [2023-08-29 21:09:23,437 INFO L137 encePairwiseOnDemand]: 738/741 looper letters, 246 selfloop transitions, 16 changer transitions 0/267 dead transitions. [2023-08-29 21:09:23,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 267 transitions, 3816 flow [2023-08-29 21:09:23,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:09:23,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:09:23,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 869 transitions. [2023-08-29 21:09:23,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3909131803868646 [2023-08-29 21:09:23,439 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 869 transitions. [2023-08-29 21:09:23,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 869 transitions. [2023-08-29 21:09:23,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:09:23,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 869 transitions. [2023-08-29 21:09:23,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 289.6666666666667) internal successors, (869), 3 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:23,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 741.0) internal successors, (2964), 4 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:23,441 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 741.0) internal successors, (2964), 4 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:23,441 INFO L175 Difference]: Start difference. First operand has 192 places, 255 transitions, 3186 flow. Second operand 3 states and 869 transitions. [2023-08-29 21:09:23,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 267 transitions, 3816 flow [2023-08-29 21:09:23,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 267 transitions, 3784 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:09:23,478 INFO L231 Difference]: Finished difference. Result has 191 places, 254 transitions, 3184 flow [2023-08-29 21:09:23,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=3152, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3184, PETRI_PLACES=191, PETRI_TRANSITIONS=254} [2023-08-29 21:09:23,479 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 85 predicate places. [2023-08-29 21:09:23,479 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 254 transitions, 3184 flow [2023-08-29 21:09:23,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 275.3333333333333) internal successors, (826), 3 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:23,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:09:23,479 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] [2023-08-29 21:09:23,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-29 21:09:23,479 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting threadErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:09:23,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:09:23,480 INFO L85 PathProgramCache]: Analyzing trace with hash -2005487723, now seen corresponding path program 1 times [2023-08-29 21:09:23,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:09:23,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376533317] [2023-08-29 21:09:23,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:09:23,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:09:23,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:09:24,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:09:24,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:09:24,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376533317] [2023-08-29 21:09:24,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376533317] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:09:24,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:09:24,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-29 21:09:24,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488366161] [2023-08-29 21:09:24,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:09:24,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 21:09:24,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:09:24,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 21:09:24,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2023-08-29 21:09:27,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 741 [2023-08-29 21:09:27,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 254 transitions, 3184 flow. Second operand has 13 states, 13 states have (on average 245.76923076923077) internal successors, (3195), 13 states have internal predecessors, (3195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:27,058 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:09:27,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 741 [2023-08-29 21:09:27,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:09:28,473 INFO L130 PetriNetUnfolder]: 1407/3312 cut-off events. [2023-08-29 21:09:28,473 INFO L131 PetriNetUnfolder]: For 20842/20842 co-relation queries the response was YES. [2023-08-29 21:09:28,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17261 conditions, 3312 events. 1407/3312 cut-off events. For 20842/20842 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 19991 event pairs, 460 based on Foata normal form. 0/2799 useless extension candidates. Maximal degree in co-relation 17205. Up to 1880 conditions per place. [2023-08-29 21:09:28,502 INFO L137 encePairwiseOnDemand]: 723/741 looper letters, 262 selfloop transitions, 104 changer transitions 1/368 dead transitions. [2023-08-29 21:09:28,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 368 transitions, 4835 flow [2023-08-29 21:09:28,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-29 21:09:28,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-29 21:09:28,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5306 transitions. [2023-08-29 21:09:28,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34098065677013045 [2023-08-29 21:09:28,507 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5306 transitions. [2023-08-29 21:09:28,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5306 transitions. [2023-08-29 21:09:28,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:09:28,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5306 transitions. [2023-08-29 21:09:28,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 252.66666666666666) internal successors, (5306), 21 states have internal predecessors, (5306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:28,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 741.0) internal successors, (16302), 22 states have internal predecessors, (16302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:28,524 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 741.0) internal successors, (16302), 22 states have internal predecessors, (16302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:28,524 INFO L175 Difference]: Start difference. First operand has 191 places, 254 transitions, 3184 flow. Second operand 21 states and 5306 transitions. [2023-08-29 21:09:28,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 368 transitions, 4835 flow [2023-08-29 21:09:28,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 368 transitions, 4803 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:09:28,573 INFO L231 Difference]: Finished difference. Result has 214 places, 262 transitions, 3495 flow [2023-08-29 21:09:28,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=3152, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3495, PETRI_PLACES=214, PETRI_TRANSITIONS=262} [2023-08-29 21:09:28,574 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 108 predicate places. [2023-08-29 21:09:28,574 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 262 transitions, 3495 flow [2023-08-29 21:09:28,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 245.76923076923077) internal successors, (3195), 13 states have internal predecessors, (3195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:28,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:09:28,575 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] [2023-08-29 21:09:28,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-29 21:09:28,575 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting threadErr41REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:09:28,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:09:28,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1166561615, now seen corresponding path program 1 times [2023-08-29 21:09:28,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:09:28,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508860685] [2023-08-29 21:09:28,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:09:28,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:09:28,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:09:28,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:09:28,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:09:28,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508860685] [2023-08-29 21:09:28,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508860685] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:09:28,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:09:28,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:09:28,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013965256] [2023-08-29 21:09:28,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:09:28,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:09:28,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:09:28,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:09:28,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:09:28,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 741 [2023-08-29 21:09:28,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 262 transitions, 3495 flow. Second operand has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:28,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:09:28,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 741 [2023-08-29 21:09:28,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:09:29,517 INFO L130 PetriNetUnfolder]: 1362/3251 cut-off events. [2023-08-29 21:09:29,518 INFO L131 PetriNetUnfolder]: For 21355/21355 co-relation queries the response was YES. [2023-08-29 21:09:29,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17435 conditions, 3251 events. 1362/3251 cut-off events. For 21355/21355 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 20214 event pairs, 596 based on Foata normal form. 0/2815 useless extension candidates. Maximal degree in co-relation 17374. Up to 2348 conditions per place. [2023-08-29 21:09:29,545 INFO L137 encePairwiseOnDemand]: 733/741 looper letters, 239 selfloop transitions, 54 changer transitions 0/299 dead transitions. [2023-08-29 21:09:29,545 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 299 transitions, 4350 flow [2023-08-29 21:09:29,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:09:29,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:09:29,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1399 transitions. [2023-08-29 21:09:29,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3775978407557355 [2023-08-29 21:09:29,546 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1399 transitions. [2023-08-29 21:09:29,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1399 transitions. [2023-08-29 21:09:29,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:09:29,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1399 transitions. [2023-08-29 21:09:29,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 279.8) internal successors, (1399), 5 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:29,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 741.0) internal successors, (4446), 6 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:29,549 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 741.0) internal successors, (4446), 6 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:29,550 INFO L175 Difference]: Start difference. First operand has 214 places, 262 transitions, 3495 flow. Second operand 5 states and 1399 transitions. [2023-08-29 21:09:29,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 299 transitions, 4350 flow [2023-08-29 21:09:29,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 299 transitions, 4139 flow, removed 2 selfloop flow, removed 16 redundant places. [2023-08-29 21:09:29,642 INFO L231 Difference]: Finished difference. Result has 201 places, 261 transitions, 3390 flow [2023-08-29 21:09:29,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=3282, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3390, PETRI_PLACES=201, PETRI_TRANSITIONS=261} [2023-08-29 21:09:29,642 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 95 predicate places. [2023-08-29 21:09:29,643 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 261 transitions, 3390 flow [2023-08-29 21:09:29,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:29,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:09:29,643 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] [2023-08-29 21:09:29,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-29 21:09:29,643 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting threadErr42REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:09:29,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:09:29,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1166561622, now seen corresponding path program 1 times [2023-08-29 21:09:29,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:09:29,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418895073] [2023-08-29 21:09:29,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:09:29,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:09:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:09:29,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:09:29,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:09:29,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418895073] [2023-08-29 21:09:29,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418895073] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:09:29,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:09:29,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:09:29,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689155733] [2023-08-29 21:09:29,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:09:29,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:09:29,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:09:29,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:09:29,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:09:29,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 741 [2023-08-29 21:09:29,887 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 261 transitions, 3390 flow. Second operand has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:29,887 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:09:29,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 741 [2023-08-29 21:09:29,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:09:30,570 INFO L130 PetriNetUnfolder]: 1349/3214 cut-off events. [2023-08-29 21:09:30,570 INFO L131 PetriNetUnfolder]: For 22128/22128 co-relation queries the response was YES. [2023-08-29 21:09:30,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17245 conditions, 3214 events. 1349/3214 cut-off events. For 22128/22128 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 19760 event pairs, 562 based on Foata normal form. 24/2805 useless extension candidates. Maximal degree in co-relation 17184. Up to 1798 conditions per place. [2023-08-29 21:09:30,597 INFO L137 encePairwiseOnDemand]: 736/741 looper letters, 278 selfloop transitions, 24 changer transitions 1/309 dead transitions. [2023-08-29 21:09:30,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 309 transitions, 4349 flow [2023-08-29 21:09:30,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:09:30,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:09:30,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1431 transitions. [2023-08-29 21:09:30,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862348178137652 [2023-08-29 21:09:30,599 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1431 transitions. [2023-08-29 21:09:30,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1431 transitions. [2023-08-29 21:09:30,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:09:30,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1431 transitions. [2023-08-29 21:09:30,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 286.2) internal successors, (1431), 5 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:30,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 741.0) internal successors, (4446), 6 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:30,602 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 741.0) internal successors, (4446), 6 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:30,603 INFO L175 Difference]: Start difference. First operand has 201 places, 261 transitions, 3390 flow. Second operand 5 states and 1431 transitions. [2023-08-29 21:09:30,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 309 transitions, 4349 flow [2023-08-29 21:09:30,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 309 transitions, 4246 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 21:09:30,654 INFO L231 Difference]: Finished difference. Result has 200 places, 260 transitions, 3333 flow [2023-08-29 21:09:30,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=3285, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3333, PETRI_PLACES=200, PETRI_TRANSITIONS=260} [2023-08-29 21:09:30,655 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 94 predicate places. [2023-08-29 21:09:30,655 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 260 transitions, 3333 flow [2023-08-29 21:09:30,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:30,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:09:30,655 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, 1] [2023-08-29 21:09:30,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-29 21:09:30,656 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting threadErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:09:30,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:09:30,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1803675375, now seen corresponding path program 1 times [2023-08-29 21:09:30,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:09:30,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500467921] [2023-08-29 21:09:30,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:09:30,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:09:30,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:09:31,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:09:31,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:09:31,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500467921] [2023-08-29 21:09:31,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500467921] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:09:31,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:09:31,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-29 21:09:31,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988501192] [2023-08-29 21:09:31,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:09:31,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 21:09:31,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:09:31,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 21:09:31,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-08-29 21:09:32,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 741 [2023-08-29 21:09:32,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 260 transitions, 3333 flow. Second operand has 10 states, 10 states have (on average 253.6) internal successors, (2536), 10 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:32,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:09:32,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 741 [2023-08-29 21:09:32,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:09:33,188 INFO L130 PetriNetUnfolder]: 1347/3180 cut-off events. [2023-08-29 21:09:33,188 INFO L131 PetriNetUnfolder]: For 21380/21380 co-relation queries the response was YES. [2023-08-29 21:09:33,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17102 conditions, 3180 events. 1347/3180 cut-off events. For 21380/21380 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 19271 event pairs, 256 based on Foata normal form. 0/2773 useless extension candidates. Maximal degree in co-relation 17041. Up to 1489 conditions per place. [2023-08-29 21:09:33,214 INFO L137 encePairwiseOnDemand]: 725/741 looper letters, 247 selfloop transitions, 83 changer transitions 1/334 dead transitions. [2023-08-29 21:09:33,214 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 334 transitions, 4565 flow [2023-08-29 21:09:33,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 21:09:33,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 21:09:33,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3157 transitions. [2023-08-29 21:09:33,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.355038236617184 [2023-08-29 21:09:33,217 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3157 transitions. [2023-08-29 21:09:33,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3157 transitions. [2023-08-29 21:09:33,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:09:33,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3157 transitions. [2023-08-29 21:09:33,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 263.0833333333333) internal successors, (3157), 12 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:33,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 741.0) internal successors, (9633), 13 states have internal predecessors, (9633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:33,227 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 741.0) internal successors, (9633), 13 states have internal predecessors, (9633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:33,227 INFO L175 Difference]: Start difference. First operand has 200 places, 260 transitions, 3333 flow. Second operand 12 states and 3157 transitions. [2023-08-29 21:09:33,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 334 transitions, 4565 flow [2023-08-29 21:09:33,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 334 transitions, 4517 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 21:09:33,287 INFO L231 Difference]: Finished difference. Result has 207 places, 260 transitions, 3476 flow [2023-08-29 21:09:33,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=3283, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3476, PETRI_PLACES=207, PETRI_TRANSITIONS=260} [2023-08-29 21:09:33,288 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 101 predicate places. [2023-08-29 21:09:33,288 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 260 transitions, 3476 flow [2023-08-29 21:09:33,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 253.6) internal successors, (2536), 10 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:33,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:09:33,289 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, 1] [2023-08-29 21:09:33,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-29 21:09:33,289 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting threadErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:09:33,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:09:33,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1803675374, now seen corresponding path program 1 times [2023-08-29 21:09:33,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:09:33,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250514532] [2023-08-29 21:09:33,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:09:33,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:09:33,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:09:33,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:09:33,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:09:33,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250514532] [2023-08-29 21:09:33,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250514532] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:09:33,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:09:33,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 21:09:33,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184760671] [2023-08-29 21:09:33,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:09:33,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:09:33,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:09:33,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:09:33,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:09:33,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 741 [2023-08-29 21:09:33,744 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 260 transitions, 3476 flow. Second operand has 5 states, 5 states have (on average 265.2) internal successors, (1326), 5 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:33,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:09:33,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 741 [2023-08-29 21:09:33,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:09:34,407 INFO L130 PetriNetUnfolder]: 1344/3154 cut-off events. [2023-08-29 21:09:34,408 INFO L131 PetriNetUnfolder]: For 22940/22940 co-relation queries the response was YES. [2023-08-29 21:09:34,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17529 conditions, 3154 events. 1344/3154 cut-off events. For 22940/22940 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 19267 event pairs, 218 based on Foata normal form. 26/2773 useless extension candidates. Maximal degree in co-relation 17467. Up to 2473 conditions per place. [2023-08-29 21:09:34,428 INFO L137 encePairwiseOnDemand]: 732/741 looper letters, 243 selfloop transitions, 45 changer transitions 1/291 dead transitions. [2023-08-29 21:09:34,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 291 transitions, 4303 flow [2023-08-29 21:09:34,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:09:34,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:09:34,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1644 transitions. [2023-08-29 21:09:34,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3697705802968961 [2023-08-29 21:09:34,432 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1644 transitions. [2023-08-29 21:09:34,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1644 transitions. [2023-08-29 21:09:34,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:09:34,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1644 transitions. [2023-08-29 21:09:34,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 274.0) internal successors, (1644), 6 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:34,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 741.0) internal successors, (5187), 7 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:34,437 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 741.0) internal successors, (5187), 7 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:34,437 INFO L175 Difference]: Start difference. First operand has 207 places, 260 transitions, 3476 flow. Second operand 6 states and 1644 transitions. [2023-08-29 21:09:34,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 291 transitions, 4303 flow [2023-08-29 21:09:34,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 291 transitions, 4138 flow, removed 7 selfloop flow, removed 11 redundant places. [2023-08-29 21:09:34,485 INFO L231 Difference]: Finished difference. Result has 200 places, 259 transitions, 3399 flow [2023-08-29 21:09:34,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=3309, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3399, PETRI_PLACES=200, PETRI_TRANSITIONS=259} [2023-08-29 21:09:34,486 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 94 predicate places. [2023-08-29 21:09:34,486 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 259 transitions, 3399 flow [2023-08-29 21:09:34,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 265.2) internal successors, (1326), 5 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:34,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:09:34,486 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, 1, 1, 1, 1] [2023-08-29 21:09:34,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-29 21:09:34,486 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:09:34,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:09:34,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1288828201, now seen corresponding path program 1 times [2023-08-29 21:09:34,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:09:34,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238341071] [2023-08-29 21:09:34,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:09:34,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:09:34,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:09:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:09:34,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:09:34,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238341071] [2023-08-29 21:09:34,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238341071] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:09:34,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040853874] [2023-08-29 21:09:34,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:09:34,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:09:34,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:09:34,901 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) [2023-08-29 21:09:34,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-29 21:09:35,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:09:35,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-29 21:09:35,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:09:35,179 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-29 21:09:35,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-29 21:09:35,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-08-29 21:09:35,260 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-29 21:09:35,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-29 21:09:35,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-08-29 21:09:35,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-29 21:09:35,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:09:35,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040853874] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:09:35,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 21:09:35,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2023-08-29 21:09:35,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836153373] [2023-08-29 21:09:35,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:09:35,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 21:09:35,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:09:35,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 21:09:35,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:09:35,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 741 [2023-08-29 21:09:35,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 259 transitions, 3399 flow. Second operand has 6 states, 6 states have (on average 261.6666666666667) internal successors, (1570), 6 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:35,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:09:35,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 741 [2023-08-29 21:09:35,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:09:36,263 INFO L130 PetriNetUnfolder]: 1127/2774 cut-off events. [2023-08-29 21:09:36,263 INFO L131 PetriNetUnfolder]: For 21285/21285 co-relation queries the response was YES. [2023-08-29 21:09:36,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15559 conditions, 2774 events. 1127/2774 cut-off events. For 21285/21285 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 16791 event pairs, 467 based on Foata normal form. 88/2549 useless extension candidates. Maximal degree in co-relation 15501. Up to 1867 conditions per place. [2023-08-29 21:09:36,284 INFO L137 encePairwiseOnDemand]: 732/741 looper letters, 205 selfloop transitions, 76 changer transitions 0/287 dead transitions. [2023-08-29 21:09:36,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 287 transitions, 4201 flow [2023-08-29 21:09:36,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:09:36,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:09:36,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1624 transitions. [2023-08-29 21:09:36,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36527215474583896 [2023-08-29 21:09:36,287 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1624 transitions. [2023-08-29 21:09:36,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1624 transitions. [2023-08-29 21:09:36,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:09:36,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1624 transitions. [2023-08-29 21:09:36,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 270.6666666666667) internal successors, (1624), 6 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:36,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 741.0) internal successors, (5187), 7 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:36,292 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 741.0) internal successors, (5187), 7 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:36,292 INFO L175 Difference]: Start difference. First operand has 200 places, 259 transitions, 3399 flow. Second operand 6 states and 1624 transitions. [2023-08-29 21:09:36,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 287 transitions, 4201 flow [2023-08-29 21:09:36,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 287 transitions, 4061 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-29 21:09:36,353 INFO L231 Difference]: Finished difference. Result has 196 places, 257 transitions, 3403 flow [2023-08-29 21:09:36,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=3251, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3403, PETRI_PLACES=196, PETRI_TRANSITIONS=257} [2023-08-29 21:09:36,354 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 90 predicate places. [2023-08-29 21:09:36,354 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 257 transitions, 3403 flow [2023-08-29 21:09:36,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 261.6666666666667) internal successors, (1570), 6 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:36,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:09:36,355 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, 1, 1, 1, 1] [2023-08-29 21:09:36,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-29 21:09:36,555 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,SelfDestructingSolverStorable36 [2023-08-29 21:09:36,555 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:09:36,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:09:36,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1039657198, now seen corresponding path program 1 times [2023-08-29 21:09:36,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:09:36,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880112771] [2023-08-29 21:09:36,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:09:36,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:09:36,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:09:37,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:09:37,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:09:37,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880112771] [2023-08-29 21:09:37,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880112771] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:09:37,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753753859] [2023-08-29 21:09:37,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:09:37,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:09:37,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:09:37,129 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) [2023-08-29 21:09:37,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-29 21:09:37,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:09:37,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-29 21:09:37,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:09:37,441 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-29 21:09:37,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-29 21:09:37,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-08-29 21:09:37,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-08-29 21:09:37,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:09:37,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-08-29 21:09:37,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:09:37,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:09:41,179 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~i~2#1| 4))) (and (or (<= 0 (+ .cse0 |c_~#threads~0.offset| 4)) (forall ((|v_threadThread1of1ForFork0_Push_~#head1~1#1.base_91| Int) (v_ArrVal_1142 Int)) (not (= (select (store |c_#valid| |c_threadThread1of1ForFork0_Pop_~#head2~0#1.base| v_ArrVal_1142) |v_threadThread1of1ForFork0_Push_~#head1~1#1.base_91|) 0)))) (forall ((|v_threadThread1of1ForFork0_Push_~#head1~1#1.base_91| Int) (v_ArrVal_1142 Int)) (or (not (= (select (store |c_#valid| |c_threadThread1of1ForFork0_Pop_~#head2~0#1.base| v_ArrVal_1142) |v_threadThread1of1ForFork0_Push_~#head1~1#1.base_91|) 0)) (forall ((v_ArrVal_1143 Int)) (<= (+ .cse0 |c_~#threads~0.offset| 8) (select (store |c_#length| |v_threadThread1of1ForFork0_Push_~#head1~1#1.base_91| v_ArrVal_1143) |c_~#threads~0.base|))))))) is different from false [2023-08-29 21:09:41,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:09:41,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753753859] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:09:41,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:09:41,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 19 [2023-08-29 21:09:41,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253627211] [2023-08-29 21:09:41,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:09:41,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-29 21:09:41,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:09:41,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-29 21:09:41,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=276, Unknown=1, NotChecked=36, Total=420 [2023-08-29 21:09:41,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 741 [2023-08-29 21:09:41,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 257 transitions, 3403 flow. Second operand has 21 states, 21 states have (on average 181.14285714285714) internal successors, (3804), 21 states have internal predecessors, (3804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:41,851 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:09:41,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 741 [2023-08-29 21:09:41,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:09:43,407 INFO L130 PetriNetUnfolder]: 1066/2872 cut-off events. [2023-08-29 21:09:43,407 INFO L131 PetriNetUnfolder]: For 23314/23314 co-relation queries the response was YES. [2023-08-29 21:09:43,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16269 conditions, 2872 events. 1066/2872 cut-off events. For 23314/23314 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 17971 event pairs, 275 based on Foata normal form. 44/2645 useless extension candidates. Maximal degree in co-relation 16213. Up to 1302 conditions per place. [2023-08-29 21:09:43,426 INFO L137 encePairwiseOnDemand]: 725/741 looper letters, 375 selfloop transitions, 116 changer transitions 4/496 dead transitions. [2023-08-29 21:09:43,426 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 496 transitions, 6991 flow [2023-08-29 21:09:43,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-29 21:09:43,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-29 21:09:43,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2489 transitions. [2023-08-29 21:09:43,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2583826429980276 [2023-08-29 21:09:43,429 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2489 transitions. [2023-08-29 21:09:43,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2489 transitions. [2023-08-29 21:09:43,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:09:43,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2489 transitions. [2023-08-29 21:09:43,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 191.46153846153845) internal successors, (2489), 13 states have internal predecessors, (2489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:43,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 741.0) internal successors, (10374), 14 states have internal predecessors, (10374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:43,438 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 741.0) internal successors, (10374), 14 states have internal predecessors, (10374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:43,438 INFO L175 Difference]: Start difference. First operand has 196 places, 257 transitions, 3403 flow. Second operand 13 states and 2489 transitions. [2023-08-29 21:09:43,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 496 transitions, 6991 flow [2023-08-29 21:09:43,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 496 transitions, 6777 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-29 21:09:43,506 INFO L231 Difference]: Finished difference. Result has 211 places, 306 transitions, 4570 flow [2023-08-29 21:09:43,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=3251, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4570, PETRI_PLACES=211, PETRI_TRANSITIONS=306} [2023-08-29 21:09:43,507 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 105 predicate places. [2023-08-29 21:09:43,507 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 306 transitions, 4570 flow [2023-08-29 21:09:43,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 181.14285714285714) internal successors, (3804), 21 states have internal predecessors, (3804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:43,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:09:43,508 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, 1] [2023-08-29 21:09:43,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-29 21:09:43,717 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,SelfDestructingSolverStorable37 [2023-08-29 21:09:43,717 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting threadErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:09:43,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:09:43,717 INFO L85 PathProgramCache]: Analyzing trace with hash 2130157535, now seen corresponding path program 1 times [2023-08-29 21:09:43,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:09:43,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037852399] [2023-08-29 21:09:43,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:09:43,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:09:43,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:09:43,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:09:43,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:09:43,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037852399] [2023-08-29 21:09:43,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037852399] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:09:43,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:09:43,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 21:09:43,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72363035] [2023-08-29 21:09:43,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:09:43,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:09:43,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:09:43,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:09:43,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:09:44,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 741 [2023-08-29 21:09:44,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 306 transitions, 4570 flow. Second operand has 5 states, 5 states have (on average 263.0) internal successors, (1315), 5 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:44,181 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:09:44,181 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 741 [2023-08-29 21:09:44,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:09:44,788 INFO L130 PetriNetUnfolder]: 1047/2761 cut-off events. [2023-08-29 21:09:44,788 INFO L131 PetriNetUnfolder]: For 27479/27479 co-relation queries the response was YES. [2023-08-29 21:09:44,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16694 conditions, 2761 events. 1047/2761 cut-off events. For 27479/27479 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 16794 event pairs, 369 based on Foata normal form. 33/2527 useless extension candidates. Maximal degree in co-relation 16631. Up to 2022 conditions per place. [2023-08-29 21:09:44,810 INFO L137 encePairwiseOnDemand]: 732/741 looper letters, 257 selfloop transitions, 64 changer transitions 0/323 dead transitions. [2023-08-29 21:09:44,811 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 323 transitions, 5368 flow [2023-08-29 21:09:44,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:09:44,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:09:44,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1098 transitions. [2023-08-29 21:09:44,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37044534412955465 [2023-08-29 21:09:44,812 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1098 transitions. [2023-08-29 21:09:44,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1098 transitions. [2023-08-29 21:09:44,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:09:44,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1098 transitions. [2023-08-29 21:09:44,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 274.5) internal successors, (1098), 4 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:44,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 741.0) internal successors, (3705), 5 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:44,815 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 741.0) internal successors, (3705), 5 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:44,815 INFO L175 Difference]: Start difference. First operand has 211 places, 306 transitions, 4570 flow. Second operand 4 states and 1098 transitions. [2023-08-29 21:09:44,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 323 transitions, 5368 flow [2023-08-29 21:09:44,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 323 transitions, 5320 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-08-29 21:09:44,879 INFO L231 Difference]: Finished difference. Result has 210 places, 301 transitions, 4578 flow [2023-08-29 21:09:44,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=4450, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4578, PETRI_PLACES=210, PETRI_TRANSITIONS=301} [2023-08-29 21:09:44,879 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 104 predicate places. [2023-08-29 21:09:44,879 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 301 transitions, 4578 flow [2023-08-29 21:09:44,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 263.0) internal successors, (1315), 5 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:44,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:09:44,880 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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] [2023-08-29 21:09:44,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-08-29 21:09:44,880 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting threadErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:09:44,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:09:44,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1610375608, now seen corresponding path program 1 times [2023-08-29 21:09:44,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:09:44,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138296172] [2023-08-29 21:09:44,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:09:44,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:09:44,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:09:45,371 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:09:45,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:09:45,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138296172] [2023-08-29 21:09:45,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138296172] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:09:45,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649316161] [2023-08-29 21:09:45,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:09:45,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:09:45,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:09:45,373 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) [2023-08-29 21:09:45,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-29 21:09:45,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:09:45,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 70 conjunts are in the unsatisfiable core [2023-08-29 21:09:45,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:09:45,643 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 15 treesize of output 11 [2023-08-29 21:09:45,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-29 21:09:45,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:09:45,917 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 26 treesize of output 21 [2023-08-29 21:09:45,981 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:09:45,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:09:46,037 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:09:46,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 59 [2023-08-29 21:09:46,235 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:09:46,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 52 [2023-08-29 21:09:46,243 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:09:46,244 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 52 treesize of output 54 [2023-08-29 21:09:46,250 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 6 treesize of output 4 [2023-08-29 21:09:46,286 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:09:46,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 90 [2023-08-29 21:09:46,619 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:09:46,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649316161] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:09:46,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:09:46,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 10] total 29 [2023-08-29 21:09:46,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114624315] [2023-08-29 21:09:46,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:09:46,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-29 21:09:46,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:09:46,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-29 21:09:46,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2023-08-29 21:09:50,450 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] [2023-08-29 21:09:53,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:09:55,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:09:59,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 741 [2023-08-29 21:09:59,814 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 301 transitions, 4578 flow. Second operand has 31 states, 31 states have (on average 238.0) internal successors, (7378), 31 states have internal predecessors, (7378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:09:59,814 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:09:59,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 741 [2023-08-29 21:09:59,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:10:03,547 INFO L130 PetriNetUnfolder]: 996/2756 cut-off events. [2023-08-29 21:10:03,547 INFO L131 PetriNetUnfolder]: For 27825/27825 co-relation queries the response was YES. [2023-08-29 21:10:03,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16501 conditions, 2756 events. 996/2756 cut-off events. For 27825/27825 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 17300 event pairs, 28 based on Foata normal form. 0/2597 useless extension candidates. Maximal degree in co-relation 16437. Up to 412 conditions per place. [2023-08-29 21:10:03,567 INFO L137 encePairwiseOnDemand]: 721/741 looper letters, 406 selfloop transitions, 213 changer transitions 2/623 dead transitions. [2023-08-29 21:10:03,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 623 transitions, 9463 flow [2023-08-29 21:10:03,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-29 21:10:03,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-29 21:10:03,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 8076 transitions. [2023-08-29 21:10:03,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3302662250030671 [2023-08-29 21:10:03,573 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 8076 transitions. [2023-08-29 21:10:03,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 8076 transitions. [2023-08-29 21:10:03,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:10:03,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 8076 transitions. [2023-08-29 21:10:03,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 244.72727272727272) internal successors, (8076), 33 states have internal predecessors, (8076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:03,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 741.0) internal successors, (25194), 34 states have internal predecessors, (25194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:03,597 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 741.0) internal successors, (25194), 34 states have internal predecessors, (25194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:03,598 INFO L175 Difference]: Start difference. First operand has 210 places, 301 transitions, 4578 flow. Second operand 33 states and 8076 transitions. [2023-08-29 21:10:03,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 623 transitions, 9463 flow [2023-08-29 21:10:03,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 623 transitions, 9325 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:10:03,685 INFO L231 Difference]: Finished difference. Result has 244 places, 389 transitions, 6342 flow [2023-08-29 21:10:03,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=4450, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=6342, PETRI_PLACES=244, PETRI_TRANSITIONS=389} [2023-08-29 21:10:03,686 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 138 predicate places. [2023-08-29 21:10:03,686 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 389 transitions, 6342 flow [2023-08-29 21:10:03,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 238.0) internal successors, (7378), 31 states have internal predecessors, (7378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:03,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:10:03,688 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:10:03,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-29 21:10:03,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:10:03,889 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting threadErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:10:03,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:10:03,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1761465912, now seen corresponding path program 1 times [2023-08-29 21:10:03,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:10:03,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808545908] [2023-08-29 21:10:03,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:10:03,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:10:03,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:10:04,651 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:10:04,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:10:04,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808545908] [2023-08-29 21:10:04,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808545908] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:10:04,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516427065] [2023-08-29 21:10:04,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:10:04,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:10:04,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:10:04,653 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:10:04,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-29 21:10:04,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:10:04,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 72 conjunts are in the unsatisfiable core [2023-08-29 21:10:04,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:10:04,970 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 15 treesize of output 11 [2023-08-29 21:10:05,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-29 21:10:05,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:10:05,303 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 26 treesize of output 21 [2023-08-29 21:10:05,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:10:05,385 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 21 treesize of output 21 [2023-08-29 21:10:05,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:10:05,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:10:05,445 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_~#stack~0.offset| 24))) (and (forall ((v_ArrVal_1336 (Array Int Int))) (<= 0 (+ (* (select (select (store |c_#memory_int| |c_~#threads~0.base| v_ArrVal_1336) |c_~#stack~0.base|) .cse0) 8) |c_~#stack~0.offset| 4))) (forall ((v_ArrVal_1336 (Array Int Int))) (<= (+ (* (select (select (store |c_#memory_int| |c_~#threads~0.base| v_ArrVal_1336) |c_~#stack~0.base|) .cse0) 8) 8 |c_~#stack~0.offset|) (select |c_#length| |c_~#stack~0.base|))))) is different from false [2023-08-29 21:10:05,476 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:10:05,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 65 [2023-08-29 21:10:08,096 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-29 21:10:08,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 91 treesize of output 120 [2023-08-29 21:10:08,128 INFO L321 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2023-08-29 21:10:08,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 84 [2023-08-29 21:10:08,139 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 59 treesize of output 55 [2023-08-29 21:10:08,155 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:10:08,155 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 92 treesize of output 95 [2023-08-29 21:10:08,161 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 67 treesize of output 63 [2023-08-29 21:10:08,267 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 6 treesize of output 4 [2023-08-29 21:10:08,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2023-08-29 21:10:08,754 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 4 not checked. [2023-08-29 21:10:08,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516427065] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:10:08,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:10:08,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 11] total 32 [2023-08-29 21:10:08,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751456795] [2023-08-29 21:10:08,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:10:08,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-29 21:10:08,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:10:08,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-29 21:10:08,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=948, Unknown=1, NotChecked=62, Total=1122 [2023-08-29 21:10:09,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 741 [2023-08-29 21:10:09,288 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 389 transitions, 6342 flow. Second operand has 34 states, 34 states have (on average 178.91176470588235) internal successors, (6083), 34 states have internal predecessors, (6083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:09,288 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:10:09,289 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 741 [2023-08-29 21:10:09,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:10:13,843 INFO L130 PetriNetUnfolder]: 1052/2849 cut-off events. [2023-08-29 21:10:13,843 INFO L131 PetriNetUnfolder]: For 32143/32143 co-relation queries the response was YES. [2023-08-29 21:10:13,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18401 conditions, 2849 events. 1052/2849 cut-off events. For 32143/32143 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 17738 event pairs, 57 based on Foata normal form. 0/2714 useless extension candidates. Maximal degree in co-relation 18332. Up to 432 conditions per place. [2023-08-29 21:10:13,875 INFO L137 encePairwiseOnDemand]: 712/741 looper letters, 447 selfloop transitions, 203 changer transitions 3/654 dead transitions. [2023-08-29 21:10:13,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 654 transitions, 10325 flow [2023-08-29 21:10:13,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-29 21:10:13,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-29 21:10:13,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5778 transitions. [2023-08-29 21:10:13,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25153454355491706 [2023-08-29 21:10:13,880 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5778 transitions. [2023-08-29 21:10:13,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5778 transitions. [2023-08-29 21:10:13,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:10:13,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5778 transitions. [2023-08-29 21:10:13,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 186.38709677419354) internal successors, (5778), 31 states have internal predecessors, (5778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:13,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 741.0) internal successors, (23712), 32 states have internal predecessors, (23712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:13,899 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 741.0) internal successors, (23712), 32 states have internal predecessors, (23712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:13,899 INFO L175 Difference]: Start difference. First operand has 244 places, 389 transitions, 6342 flow. Second operand 31 states and 5778 transitions. [2023-08-29 21:10:13,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 654 transitions, 10325 flow [2023-08-29 21:10:14,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 654 transitions, 9807 flow, removed 123 selfloop flow, removed 15 redundant places. [2023-08-29 21:10:14,105 INFO L231 Difference]: Finished difference. Result has 262 places, 432 transitions, 6849 flow [2023-08-29 21:10:14,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=5791, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=6849, PETRI_PLACES=262, PETRI_TRANSITIONS=432} [2023-08-29 21:10:14,106 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 156 predicate places. [2023-08-29 21:10:14,106 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 432 transitions, 6849 flow [2023-08-29 21:10:14,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 178.91176470588235) internal successors, (6083), 34 states have internal predecessors, (6083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:14,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:10:14,107 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:10:14,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-29 21:10:14,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:10:14,308 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:10:14,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:10:14,308 INFO L85 PathProgramCache]: Analyzing trace with hash -549931686, now seen corresponding path program 2 times [2023-08-29 21:10:14,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:10:14,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855015288] [2023-08-29 21:10:14,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:10:14,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:10:14,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:10:14,838 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:10:14,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:10:14,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855015288] [2023-08-29 21:10:14,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855015288] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:10:14,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12086425] [2023-08-29 21:10:14,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 21:10:14,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:10:14,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:10:14,841 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:10:14,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-29 21:10:15,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 21:10:15,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 21:10:15,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-29 21:10:15,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:10:15,215 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-29 21:10:15,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-29 21:10:15,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-08-29 21:10:15,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-08-29 21:10:15,365 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 21:10:15,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2023-08-29 21:10:15,385 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-29 21:10:15,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-29 21:10:15,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-08-29 21:10:15,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:10:15,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-08-29 21:10:15,559 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-29 21:10:15,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:10:28,923 WARN L222 SmtUtils]: Spent 8.87s on a formula simplification. DAG size of input: 28 DAG size of output: 26 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 21:10:38,159 WARN L222 SmtUtils]: Spent 6.72s on a formula simplification. DAG size of input: 28 DAG size of output: 26 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 21:10:40,531 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-29 21:10:40,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12086425] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:10:40,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:10:40,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 20 [2023-08-29 21:10:40,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325041888] [2023-08-29 21:10:40,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:10:40,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-29 21:10:40,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:10:40,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-29 21:10:40,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=345, Unknown=2, NotChecked=0, Total=462 [2023-08-29 21:10:42,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:10:43,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:10:47,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:10:48,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:10:50,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 21:10:53,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 741 [2023-08-29 21:10:53,392 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 432 transitions, 6849 flow. Second operand has 22 states, 22 states have (on average 242.1818181818182) internal successors, (5328), 22 states have internal predecessors, (5328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:53,392 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:10:53,393 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 741 [2023-08-29 21:10:53,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:10:54,549 INFO L130 PetriNetUnfolder]: 614/1947 cut-off events. [2023-08-29 21:10:54,549 INFO L131 PetriNetUnfolder]: For 27688/27688 co-relation queries the response was YES. [2023-08-29 21:10:54,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13360 conditions, 1947 events. 614/1947 cut-off events. For 27688/27688 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 11814 event pairs, 36 based on Foata normal form. 104/2037 useless extension candidates. Maximal degree in co-relation 13291. Up to 1088 conditions per place. [2023-08-29 21:10:54,566 INFO L137 encePairwiseOnDemand]: 730/741 looper letters, 350 selfloop transitions, 148 changer transitions 4/508 dead transitions. [2023-08-29 21:10:54,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 508 transitions, 8793 flow [2023-08-29 21:10:54,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 21:10:54,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 21:10:54,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2465 transitions. [2023-08-29 21:10:54,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33265856950067474 [2023-08-29 21:10:54,569 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2465 transitions. [2023-08-29 21:10:54,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2465 transitions. [2023-08-29 21:10:54,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:10:54,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2465 transitions. [2023-08-29 21:10:54,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 246.5) internal successors, (2465), 10 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:54,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 741.0) internal successors, (8151), 11 states have internal predecessors, (8151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:54,574 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 741.0) internal successors, (8151), 11 states have internal predecessors, (8151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:54,574 INFO L175 Difference]: Start difference. First operand has 262 places, 432 transitions, 6849 flow. Second operand 10 states and 2465 transitions. [2023-08-29 21:10:54,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 508 transitions, 8793 flow [2023-08-29 21:10:54,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 508 transitions, 8258 flow, removed 13 selfloop flow, removed 25 redundant places. [2023-08-29 21:10:54,648 INFO L231 Difference]: Finished difference. Result has 239 places, 413 transitions, 6638 flow [2023-08-29 21:10:54,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=6007, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6638, PETRI_PLACES=239, PETRI_TRANSITIONS=413} [2023-08-29 21:10:54,648 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 133 predicate places. [2023-08-29 21:10:54,648 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 413 transitions, 6638 flow [2023-08-29 21:10:54,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 242.1818181818182) internal successors, (5328), 22 states have internal predecessors, (5328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:54,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:10:54,649 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:10:54,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-29 21:10:54,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:10:54,850 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting threadErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:10:54,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:10:54,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1065443455, now seen corresponding path program 1 times [2023-08-29 21:10:54,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:10:54,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881267238] [2023-08-29 21:10:54,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:10:54,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:10:54,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:10:55,840 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:10:55,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:10:55,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881267238] [2023-08-29 21:10:55,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881267238] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:10:55,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740191063] [2023-08-29 21:10:55,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:10:55,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:10:55,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:10:55,845 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:10:55,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-29 21:10:56,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:10:56,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 120 conjunts are in the unsatisfiable core [2023-08-29 21:10:56,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:10:56,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-08-29 21:10:56,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:10:56,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:10:56,171 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 18 [2023-08-29 21:10:56,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:10:56,222 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 18 [2023-08-29 21:10:56,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:10:56,262 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 18 [2023-08-29 21:10:56,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:10:56,296 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 14 treesize of output 16 [2023-08-29 21:10:56,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-29 21:10:56,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-29 21:10:56,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:10:56,628 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 18 [2023-08-29 21:10:56,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-29 21:10:56,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-29 21:10:56,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:10:56,802 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:10:56,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2023-08-29 21:10:57,151 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:10:57,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 38 [2023-08-29 21:10:57,160 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:10:57,160 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 37 treesize of output 39 [2023-08-29 21:10:57,168 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 21:10:57,170 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 20 treesize of output 12 [2023-08-29 21:10:57,175 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 21:10:57,181 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:10:57,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2023-08-29 21:10:57,582 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1522 (Array Int Int)) (v_ArrVal_1521 Int) (|v_ULTIMATE.start_atomic_store_~obj#1.offset_180| Int)) (let ((.cse0 (select (select (store (store |c_#memory_int| |c_~#stack~0.base| (store (select |c_#memory_int| |c_~#stack~0.base|) |v_ULTIMATE.start_atomic_store_~obj#1.offset_180| v_ArrVal_1521)) |c_~#threads~0.base| v_ArrVal_1522) |c_~#stack~0.base|) (+ |c_~#stack~0.offset| 24)))) (or (< (+ (* |c_ULTIMATE.start_Init_~pushCount#1| 8) |c_~#stack~0.offset|) (+ 4 |v_ULTIMATE.start_atomic_store_~obj#1.offset_180|)) (< (+ (* 8 .cse0) |c_~#stack~0.offset| 4) 0) (< .cse0 3)))) is different from false [2023-08-29 21:10:57,609 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1519 Int) (v_ArrVal_1522 (Array Int Int)) (v_ArrVal_1521 Int) (|v_ULTIMATE.start_atomic_store_~obj#1.offset_181| Int) (|v_ULTIMATE.start_atomic_store_~obj#1.offset_180| Int)) (let ((.cse0 (select (select (store (store |c_#memory_int| |c_~#stack~0.base| (store (store (select |c_#memory_int| |c_~#stack~0.base|) |v_ULTIMATE.start_atomic_store_~obj#1.offset_181| v_ArrVal_1519) |v_ULTIMATE.start_atomic_store_~obj#1.offset_180| v_ArrVal_1521)) |c_~#threads~0.base| v_ArrVal_1522) |c_~#stack~0.base|) (+ |c_~#stack~0.offset| 24)))) (or (< (+ (* |c_ULTIMATE.start_Init_~pushCount#1| 8) |c_~#stack~0.offset|) (+ 4 |v_ULTIMATE.start_atomic_store_~obj#1.offset_180|)) (< (+ |c_~#stack~0.offset| 4 (* .cse0 8)) 0) (< (+ |c_~#stack~0.offset| 4 (* |c_ULTIMATE.start_Init_~i~0#1| 8)) |v_ULTIMATE.start_atomic_store_~obj#1.offset_181|) (< .cse0 3)))) is different from false [2023-08-29 21:10:57,637 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1519 Int) (v_ArrVal_1522 (Array Int Int)) (v_ArrVal_1521 Int) (|v_ULTIMATE.start_atomic_store_~obj#1.offset_182| Int) (|v_ULTIMATE.start_atomic_store_~obj#1.offset_181| Int) (|v_ULTIMATE.start_atomic_store_~obj#1.offset_180| Int) (v_ArrVal_1516 Int)) (let ((.cse1 (* |c_ULTIMATE.start_Init_~i~0#1| 8)) (.cse0 (select (select (store (store |c_#memory_int| |c_~#stack~0.base| (store (store (store (select |c_#memory_int| |c_~#stack~0.base|) |v_ULTIMATE.start_atomic_store_~obj#1.offset_182| v_ArrVal_1516) |v_ULTIMATE.start_atomic_store_~obj#1.offset_181| v_ArrVal_1519) |v_ULTIMATE.start_atomic_store_~obj#1.offset_180| v_ArrVal_1521)) |c_~#threads~0.base| v_ArrVal_1522) |c_~#stack~0.base|) (+ |c_~#stack~0.offset| 24)))) (or (< (+ (* |c_ULTIMATE.start_Init_~pushCount#1| 8) |c_~#stack~0.offset|) (+ 4 |v_ULTIMATE.start_atomic_store_~obj#1.offset_180|)) (< .cse0 3) (< (+ |c_~#stack~0.offset| 4 .cse1) |v_ULTIMATE.start_atomic_store_~obj#1.offset_182|) (< (+ 12 |c_~#stack~0.offset| .cse1) |v_ULTIMATE.start_atomic_store_~obj#1.offset_181|) (< (+ (* .cse0 8) |c_~#stack~0.offset| 4) 0)))) is different from false [2023-08-29 21:10:57,639 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 3 not checked. [2023-08-29 21:10:57,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740191063] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:10:57,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:10:57,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 45 [2023-08-29 21:10:57,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891478979] [2023-08-29 21:10:57,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:10:57,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-08-29 21:10:57,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:10:57,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-08-29 21:10:57,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1741, Unknown=16, NotChecked=258, Total=2162 [2023-08-29 21:10:58,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 741 [2023-08-29 21:10:58,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 413 transitions, 6638 flow. Second operand has 47 states, 47 states have (on average 148.27659574468086) internal successors, (6969), 47 states have internal predecessors, (6969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:58,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:10:58,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 741 [2023-08-29 21:10:58,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:11:15,348 INFO L130 PetriNetUnfolder]: 679/2357 cut-off events. [2023-08-29 21:11:15,348 INFO L131 PetriNetUnfolder]: For 27604/27604 co-relation queries the response was YES. [2023-08-29 21:11:15,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16158 conditions, 2357 events. 679/2357 cut-off events. For 27604/27604 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 15178 event pairs, 23 based on Foata normal form. 36/2366 useless extension candidates. Maximal degree in co-relation 16093. Up to 438 conditions per place. [2023-08-29 21:11:15,365 INFO L137 encePairwiseOnDemand]: 712/741 looper letters, 412 selfloop transitions, 337 changer transitions 0/750 dead transitions. [2023-08-29 21:11:15,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 750 transitions, 12803 flow [2023-08-29 21:11:15,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-08-29 21:11:15,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2023-08-29 21:11:15,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 12052 transitions. [2023-08-29 21:11:15,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.203306342780027 [2023-08-29 21:11:15,376 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 12052 transitions. [2023-08-29 21:11:15,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 12052 transitions. [2023-08-29 21:11:15,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:11:15,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 12052 transitions. [2023-08-29 21:11:15,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 150.65) internal successors, (12052), 80 states have internal predecessors, (12052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:11:15,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 741.0) internal successors, (60021), 81 states have internal predecessors, (60021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:11:15,426 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 741.0) internal successors, (60021), 81 states have internal predecessors, (60021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:11:15,426 INFO L175 Difference]: Start difference. First operand has 239 places, 413 transitions, 6638 flow. Second operand 80 states and 12052 transitions. [2023-08-29 21:11:15,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 750 transitions, 12803 flow [2023-08-29 21:11:15,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 750 transitions, 12664 flow, removed 68 selfloop flow, removed 2 redundant places. [2023-08-29 21:11:15,518 INFO L231 Difference]: Finished difference. Result has 341 places, 539 transitions, 9787 flow [2023-08-29 21:11:15,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=6585, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=9787, PETRI_PLACES=341, PETRI_TRANSITIONS=539} [2023-08-29 21:11:15,519 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 235 predicate places. [2023-08-29 21:11:15,519 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 539 transitions, 9787 flow [2023-08-29 21:11:15,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 148.27659574468086) internal successors, (6969), 47 states have internal predecessors, (6969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:11:15,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:11:15,520 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:11:15,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-29 21:11:15,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:11:15,725 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting threadErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:11:15,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:11:15,725 INFO L85 PathProgramCache]: Analyzing trace with hash -498134288, now seen corresponding path program 1 times [2023-08-29 21:11:15,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:11:15,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712738841] [2023-08-29 21:11:15,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:11:15,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:11:15,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:11:15,977 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 21:11:15,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:11:15,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712738841] [2023-08-29 21:11:15,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712738841] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:11:15,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:11:15,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 21:11:15,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945632853] [2023-08-29 21:11:15,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:11:15,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 21:11:15,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:11:15,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 21:11:15,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-29 21:11:16,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 741 [2023-08-29 21:11:16,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 539 transitions, 9787 flow. Second operand has 6 states, 6 states have (on average 264.1666666666667) internal successors, (1585), 6 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:11:16,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:11:16,272 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 741 [2023-08-29 21:11:16,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:11:17,101 INFO L130 PetriNetUnfolder]: 677/2331 cut-off events. [2023-08-29 21:11:17,101 INFO L131 PetriNetUnfolder]: For 33465/33465 co-relation queries the response was YES. [2023-08-29 21:11:17,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17691 conditions, 2331 events. 677/2331 cut-off events. For 33465/33465 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 14881 event pairs, 88 based on Foata normal form. 21/2325 useless extension candidates. Maximal degree in co-relation 17599. Up to 1678 conditions per place. [2023-08-29 21:11:17,119 INFO L137 encePairwiseOnDemand]: 731/741 looper letters, 266 selfloop transitions, 134 changer transitions 140/542 dead transitions. [2023-08-29 21:11:17,119 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 542 transitions, 10927 flow [2023-08-29 21:11:17,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:11:17,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:11:17,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1338 transitions. [2023-08-29 21:11:17,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3611336032388664 [2023-08-29 21:11:17,121 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1338 transitions. [2023-08-29 21:11:17,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1338 transitions. [2023-08-29 21:11:17,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:11:17,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1338 transitions. [2023-08-29 21:11:17,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 267.6) internal successors, (1338), 5 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:11:17,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 741.0) internal successors, (4446), 6 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:11:17,124 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 741.0) internal successors, (4446), 6 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:11:17,124 INFO L175 Difference]: Start difference. First operand has 341 places, 539 transitions, 9787 flow. Second operand 5 states and 1338 transitions. [2023-08-29 21:11:17,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 542 transitions, 10927 flow [2023-08-29 21:11:17,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 542 transitions, 10381 flow, removed 74 selfloop flow, removed 23 redundant places. [2023-08-29 21:11:17,243 INFO L231 Difference]: Finished difference. Result has 318 places, 398 transitions, 6940 flow [2023-08-29 21:11:17,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=9212, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6940, PETRI_PLACES=318, PETRI_TRANSITIONS=398} [2023-08-29 21:11:17,244 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 212 predicate places. [2023-08-29 21:11:17,244 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 398 transitions, 6940 flow [2023-08-29 21:11:17,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 264.1666666666667) internal successors, (1585), 6 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:11:17,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:11:17,244 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:11:17,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-08-29 21:11:17,244 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting threadErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:11:17,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:11:17,245 INFO L85 PathProgramCache]: Analyzing trace with hash -230858949, now seen corresponding path program 1 times [2023-08-29 21:11:17,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:11:17,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595760291] [2023-08-29 21:11:17,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:11:17,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:11:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:11:17,824 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-29 21:11:17,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:11:17,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595760291] [2023-08-29 21:11:17,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595760291] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:11:17,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509526225] [2023-08-29 21:11:17,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:11:17,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:11:17,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:11:17,826 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:11:17,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-29 21:11:18,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:11:18,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 70 conjunts are in the unsatisfiable core [2023-08-29 21:11:18,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:11:18,174 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 15 treesize of output 11 [2023-08-29 21:11:18,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-29 21:11:18,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:11:18,402 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 18 [2023-08-29 21:11:18,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:11:18,437 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 14 treesize of output 16 [2023-08-29 21:11:18,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-29 21:11:18,654 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:11:18,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:11:18,747 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 32 treesize of output 28 [2023-08-29 21:11:18,869 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_~#stack~0.offset| 24))) (and (or (< 0 (+ |c_~#stack~0.offset| 1)) (forall ((v_ArrVal_1676 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_~#threads~0.base| v_ArrVal_1676) |c_~#stack~0.base|) .cse0) 0))) (forall ((v_ArrVal_1676 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_~#threads~0.base| v_ArrVal_1676) |c_~#stack~0.base|) .cse0) 4)))) is different from false [2023-08-29 21:11:19,135 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-29 21:11:19,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 86 treesize of output 115 [2023-08-29 21:11:19,162 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:11:19,162 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 125 treesize of output 128 [2023-08-29 21:11:19,173 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 56 treesize of output 52 [2023-08-29 21:11:19,182 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 52 treesize of output 48 [2023-08-29 21:11:19,233 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 6 treesize of output 4 [2023-08-29 21:11:19,250 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:11:19,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 53 [2023-08-29 21:11:19,808 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-08-29 21:11:19,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509526225] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:11:19,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:11:19,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 14] total 39 [2023-08-29 21:11:19,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036906376] [2023-08-29 21:11:19,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:11:19,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-29 21:11:19,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:11:19,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-29 21:11:19,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1413, Unknown=3, NotChecked=76, Total=1640 [2023-08-29 21:11:20,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 741 [2023-08-29 21:11:20,191 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 398 transitions, 6940 flow. Second operand has 41 states, 41 states have (on average 156.9268292682927) internal successors, (6434), 41 states have internal predecessors, (6434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:11:20,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:11:20,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 741 [2023-08-29 21:11:20,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:11:24,636 INFO L130 PetriNetUnfolder]: 502/1611 cut-off events. [2023-08-29 21:11:24,637 INFO L131 PetriNetUnfolder]: For 23213/23213 co-relation queries the response was YES. [2023-08-29 21:11:24,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12220 conditions, 1611 events. 502/1611 cut-off events. For 23213/23213 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 8930 event pairs, 27 based on Foata normal form. 8/1596 useless extension candidates. Maximal degree in co-relation 12131. Up to 313 conditions per place. [2023-08-29 21:11:24,655 INFO L137 encePairwiseOnDemand]: 719/741 looper letters, 264 selfloop transitions, 247 changer transitions 0/512 dead transitions. [2023-08-29 21:11:24,655 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 512 transitions, 9531 flow [2023-08-29 21:11:24,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-08-29 21:11:24,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-08-29 21:11:24,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 7907 transitions. [2023-08-29 21:11:24,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.21341430499325237 [2023-08-29 21:11:24,661 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 7907 transitions. [2023-08-29 21:11:24,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 7907 transitions. [2023-08-29 21:11:24,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:11:24,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 7907 transitions. [2023-08-29 21:11:24,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 158.14) internal successors, (7907), 50 states have internal predecessors, (7907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:11:24,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 741.0) internal successors, (37791), 51 states have internal predecessors, (37791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:11:24,694 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 741.0) internal successors, (37791), 51 states have internal predecessors, (37791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:11:24,695 INFO L175 Difference]: Start difference. First operand has 318 places, 398 transitions, 6940 flow. Second operand 50 states and 7907 transitions. [2023-08-29 21:11:24,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 512 transitions, 9531 flow [2023-08-29 21:11:24,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 512 transitions, 8662 flow, removed 32 selfloop flow, removed 21 redundant places. [2023-08-29 21:11:24,788 INFO L231 Difference]: Finished difference. Result has 344 places, 414 transitions, 6929 flow [2023-08-29 21:11:24,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=6175, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=6929, PETRI_PLACES=344, PETRI_TRANSITIONS=414} [2023-08-29 21:11:24,789 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 238 predicate places. [2023-08-29 21:11:24,790 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 414 transitions, 6929 flow [2023-08-29 21:11:24,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 156.9268292682927) internal successors, (6434), 41 states have internal predecessors, (6434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:11:24,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:11:24,791 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:11:24,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-08-29 21:11:25,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:11:25,001 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting threadErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:11:25,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:11:25,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1395787142, now seen corresponding path program 1 times [2023-08-29 21:11:25,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:11:25,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741419580] [2023-08-29 21:11:25,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:11:25,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:11:25,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:11:26,703 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:11:26,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:11:26,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741419580] [2023-08-29 21:11:26,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741419580] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:11:26,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077255359] [2023-08-29 21:11:26,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:11:26,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:11:26,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:11:26,705 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:11:26,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-29 21:11:26,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:11:26,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 219 conjunts are in the unsatisfiable core [2023-08-29 21:11:26,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:11:26,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-08-29 21:11:26,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:11:27,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:11:27,010 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 18 [2023-08-29 21:11:27,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:11:27,058 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 18 [2023-08-29 21:11:27,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:11:27,104 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 18 [2023-08-29 21:11:27,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:11:27,141 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 14 treesize of output 16 [2023-08-29 21:11:27,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2023-08-29 21:11:27,275 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 15 treesize of output 11 [2023-08-29 21:11:27,481 INFO L321 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2023-08-29 21:11:27,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 102 treesize of output 133 [2023-08-29 21:11:27,491 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-29 21:11:27,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 65 [2023-08-29 21:11:27,503 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:11:27,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 66 [2023-08-29 21:11:27,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2023-08-29 21:11:27,558 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 5 treesize of output 3 [2023-08-29 21:11:27,561 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 5 treesize of output 3 [2023-08-29 21:11:27,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-29 21:11:27,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:11:27,907 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 26 treesize of output 21 [2023-08-29 21:11:28,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 28 [2023-08-29 21:11:28,167 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 21:11:28,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-29 21:11:28,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:11:28,295 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 14 treesize of output 16 [2023-08-29 21:11:28,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 122 [2023-08-29 21:11:28,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 83 [2023-08-29 21:11:28,451 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 26 treesize of output 10 [2023-08-29 21:11:28,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-29 21:11:28,771 INFO L321 Elim1Store]: treesize reduction 33, result has 36.5 percent of original size [2023-08-29 21:11:28,772 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 121 treesize of output 131 [2023-08-29 21:11:28,780 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 67 treesize of output 63 [2023-08-29 21:11:29,035 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:11:29,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:11:29,293 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-29 21:11:29,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 116 [2023-08-29 21:11:29,321 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:11:29,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 171 treesize of output 183 [2023-08-29 21:11:46,939 WARN L222 SmtUtils]: Spent 17.15s on a formula simplification. DAG size of input: 67 DAG size of output: 63 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 21:12:03,535 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:12:03,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 414 treesize of output 454 [2023-08-29 21:12:06,717 INFO L321 Elim1Store]: treesize reduction 102, result has 50.7 percent of original size [2023-08-29 21:12:06,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 438 treesize of output 331 [2023-08-29 21:12:06,950 INFO L321 Elim1Store]: treesize reduction 95, result has 29.6 percent of original size [2023-08-29 21:12:06,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 562 treesize of output 576 [2023-08-29 21:12:07,147 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:12:07,148 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 1294 treesize of output 1312 [2023-08-29 21:12:07,230 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:12:07,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 375 treesize of output 366 [2023-08-29 21:12:07,271 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:12:07,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 325 treesize of output 316 [2023-08-29 21:12:07,429 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 6 treesize of output 4 [2023-08-29 21:12:07,596 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 6 treesize of output 4 [2023-08-29 21:12:10,185 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 9 treesize of output 7 [2023-08-29 21:12:10,226 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:12:10,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 33 [2023-08-29 21:12:10,298 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:12:10,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2023-08-29 21:12:10,519 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 6 treesize of output 4 [2023-08-29 21:12:10,640 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 6 treesize of output 4 [2023-08-29 21:12:10,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 9 treesize of output 7 [2023-08-29 21:12:10,999 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:12:10,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 38 [2023-08-29 21:12:11,084 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:12:11,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 34 [2023-08-29 21:12:11,352 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:12:11,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 38 [2023-08-29 21:12:11,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 9 treesize of output 7 [2023-08-29 21:12:11,687 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 6 treesize of output 4 [2023-08-29 21:12:11,856 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:12:11,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 38 [2023-08-29 21:12:11,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-29 21:12:11,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-29 21:12:12,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-29 21:12:12,076 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:12:12,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 112 [2023-08-29 21:12:13,167 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:12:13,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 42 [2023-08-29 21:12:13,839 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 9 treesize of output 7 [2023-08-29 21:12:13,866 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 9 treesize of output 7 [2023-08-29 21:12:14,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 9 treesize of output 7 [2023-08-29 21:12:14,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 9 treesize of output 7 [2023-08-29 21:12:14,982 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:12:14,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 843 treesize of output 833 [2023-08-29 21:12:16,716 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 36 treesize of output 32 [2023-08-29 21:12:16,809 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:12:16,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 217 treesize of output 277 [2023-08-29 21:12:18,478 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 6 treesize of output 4 [2023-08-29 21:12:19,135 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-29 21:12:19,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 116 [2023-08-29 21:12:19,151 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:12:19,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 117 [2023-08-29 21:12:46,462 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 7 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:12:46,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077255359] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:12:46,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:12:46,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 25, 26] total 68 [2023-08-29 21:12:46,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001805319] [2023-08-29 21:12:46,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:12:46,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-08-29 21:12:46,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:12:46,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-08-29 21:12:46,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=484, Invalid=4280, Unknown=66, NotChecked=0, Total=4830 [2023-08-29 21:12:50,369 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] [2023-08-29 21:12:55,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 741 [2023-08-29 21:12:55,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 414 transitions, 6929 flow. Second operand has 70 states, 70 states have (on average 142.77142857142857) internal successors, (9994), 70 states have internal predecessors, (9994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:12:55,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:12:55,531 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 741 [2023-08-29 21:12:55,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:13:00,661 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse7 (+ |c_~#stack~0.offset| 24)) (.cse20 (* |c_ULTIMATE.start_Init_~i~0#1| 8))) (let ((.cse14 (+ |c_~#stack~0.offset| 4 .cse20)) (.cse8 (+ (* |c_ULTIMATE.start_Init_~pushCount#1| 8) |c_~#stack~0.offset|)) (.cse2 (select |c_#memory_int| |c_~#stack~0.base|)) (.cse5 (< .cse7 0)) (.cse0 (select |c_#length| |c_~#stack~0.base|)) (.cse6 (not (= |c_~#threads~0.base| |c_~#stack~0.base|)))) (and (<= |c_~#threads~0.base| 3) (<= |c_threadThread1of1ForFork0_~elem~0#1| 0) (let ((.cse4 (select .cse2 .cse7))) (let ((.cse1 (* 8 .cse4))) (let ((.cse3 (+ .cse1 |c_~#stack~0.offset| 4))) (or (< .cse0 (+ .cse1 8 |c_~#stack~0.offset|)) (forall ((v_ArrVal_1787 Int) (|threadThread1of1ForFork0_Pop_~#head2~0#1.base| Int)) (not (= (select (select (store |c_#memory_int| |c_~#stack~0.base| (store .cse2 .cse3 v_ArrVal_1787)) |threadThread1of1ForFork0_Pop_~#head2~0#1.base|) 0) .cse4))) .cse5 (and (< .cse4 4) .cse6) (< .cse3 0))))) (= |c_threadThread1of1ForFork0_atomic_compare_and_exchange_#res#1| 1) (= |c_~#stack~0.base| 4) (<= 0 |c_threadThread1of1ForFork0_Push_#in~index#1|) (<= |c_threadThread1of1ForFork0_Push_#in~index#1| 0) (<= |c_threadThread1of1ForFork0_Push_~index#1| 0) (or (let ((.cse15 (+ 12 |c_~#stack~0.offset| .cse20))) (and (or (forall ((|v_ULTIMATE.start_atomic_store_~obj#1.offset_188| Int) (v_ArrVal_1780 Int) (|v_ULTIMATE.start_atomic_store_~obj#1.offset_187| Int) (|v_ULTIMATE.start_atomic_store_~obj#1.offset_186| Int) (v_ArrVal_1783 Int) (v_ArrVal_1785 (Array Int Int)) (v_ArrVal_1782 Int) (v_ArrVal_1787 Int) (|threadThread1of1ForFork0_Pop_~#head2~0#1.base| Int)) (let ((.cse10 (store (store |c_#memory_int| |c_~#stack~0.base| (store (store (store .cse2 |v_ULTIMATE.start_atomic_store_~obj#1.offset_188| v_ArrVal_1780) |v_ULTIMATE.start_atomic_store_~obj#1.offset_187| v_ArrVal_1782) |v_ULTIMATE.start_atomic_store_~obj#1.offset_186| v_ArrVal_1783)) |c_~#threads~0.base| v_ArrVal_1785))) (let ((.cse11 (select .cse10 |c_~#stack~0.base|))) (let ((.cse9 (select .cse11 .cse7))) (let ((.cse13 (* .cse9 8))) (let ((.cse12 (+ .cse13 |c_~#stack~0.offset| 4))) (or (< .cse8 (+ 4 |v_ULTIMATE.start_atomic_store_~obj#1.offset_186|)) (not (= .cse9 (select (select (store .cse10 |c_~#stack~0.base| (store .cse11 .cse12 v_ArrVal_1787)) |threadThread1of1ForFork0_Pop_~#head2~0#1.base|) 0))) (< .cse0 (+ .cse13 8 |c_~#stack~0.offset|)) (< .cse12 0) (< .cse14 |v_ULTIMATE.start_atomic_store_~obj#1.offset_188|) (< .cse15 |v_ULTIMATE.start_atomic_store_~obj#1.offset_187|)))))))) .cse6) (forall ((|v_ULTIMATE.start_atomic_store_~obj#1.offset_188| Int) (v_ArrVal_1780 Int) (|v_ULTIMATE.start_atomic_store_~obj#1.offset_187| Int) (|v_ULTIMATE.start_atomic_store_~obj#1.offset_186| Int) (v_ArrVal_1783 Int) (v_ArrVal_1785 (Array Int Int)) (v_ArrVal_1782 Int) (v_ArrVal_1787 Int) (|threadThread1of1ForFork0_Pop_~#head2~0#1.base| Int)) (let ((.cse17 (store (store |c_#memory_int| |c_~#stack~0.base| (store (store (store .cse2 |v_ULTIMATE.start_atomic_store_~obj#1.offset_188| v_ArrVal_1780) |v_ULTIMATE.start_atomic_store_~obj#1.offset_187| v_ArrVal_1782) |v_ULTIMATE.start_atomic_store_~obj#1.offset_186| v_ArrVal_1783)) |c_~#threads~0.base| v_ArrVal_1785))) (let ((.cse18 (select .cse17 |c_~#stack~0.base|))) (let ((.cse16 (select .cse18 .cse7))) (let ((.cse19 (* .cse16 8))) (or (< .cse8 (+ 4 |v_ULTIMATE.start_atomic_store_~obj#1.offset_186|)) (not (= .cse16 (select (select (store .cse17 |c_~#stack~0.base| (store .cse18 (+ .cse19 |c_~#stack~0.offset| 4) v_ArrVal_1787)) |threadThread1of1ForFork0_Pop_~#head2~0#1.base|) 0))) (< .cse0 (+ .cse19 8 |c_~#stack~0.offset|)) (< .cse14 |v_ULTIMATE.start_atomic_store_~obj#1.offset_188|) (< .cse15 |v_ULTIMATE.start_atomic_store_~obj#1.offset_187|) (< .cse16 4))))))))) .cse5) (or .cse5 (and (forall ((|v_ULTIMATE.start_atomic_store_~obj#1.offset_187| Int)) (or (forall ((|v_ULTIMATE.start_atomic_store_~obj#1.offset_186| Int) (v_ArrVal_1782 Int)) (or (< .cse8 (+ 4 |v_ULTIMATE.start_atomic_store_~obj#1.offset_186|)) (forall ((v_ArrVal_1783 Int) (v_ArrVal_1785 (Array Int Int)) (v_ArrVal_1787 Int) (|threadThread1of1ForFork0_Pop_~#head2~0#1.base| Int)) (let ((.cse22 (store (store |c_#memory_int| |c_~#stack~0.base| (store (store .cse2 |v_ULTIMATE.start_atomic_store_~obj#1.offset_187| v_ArrVal_1782) |v_ULTIMATE.start_atomic_store_~obj#1.offset_186| v_ArrVal_1783)) |c_~#threads~0.base| v_ArrVal_1785))) (let ((.cse23 (select .cse22 |c_~#stack~0.base|))) (let ((.cse21 (select .cse23 .cse7))) (let ((.cse24 (* .cse21 8))) (or (< .cse21 4) (not (= .cse21 (select (select (store .cse22 |c_~#stack~0.base| (store .cse23 (+ .cse24 |c_~#stack~0.offset| 4) v_ArrVal_1787)) |threadThread1of1ForFork0_Pop_~#head2~0#1.base|) 0))) (< .cse0 (+ .cse24 8 |c_~#stack~0.offset|)))))))))) (< .cse14 |v_ULTIMATE.start_atomic_store_~obj#1.offset_187|))) (or .cse6 (forall ((|v_ULTIMATE.start_atomic_store_~obj#1.offset_187| Int) (|v_ULTIMATE.start_atomic_store_~obj#1.offset_186| Int) (v_ArrVal_1783 Int) (v_ArrVal_1785 (Array Int Int)) (v_ArrVal_1782 Int) (v_ArrVal_1787 Int) (|threadThread1of1ForFork0_Pop_~#head2~0#1.base| Int)) (let ((.cse26 (store (store |c_#memory_int| |c_~#stack~0.base| (store (store .cse2 |v_ULTIMATE.start_atomic_store_~obj#1.offset_187| v_ArrVal_1782) |v_ULTIMATE.start_atomic_store_~obj#1.offset_186| v_ArrVal_1783)) |c_~#threads~0.base| v_ArrVal_1785))) (let ((.cse27 (select .cse26 |c_~#stack~0.base|))) (let ((.cse25 (select .cse27 .cse7))) (let ((.cse29 (* .cse25 8))) (let ((.cse28 (+ .cse29 |c_~#stack~0.offset| 4))) (or (< .cse8 (+ 4 |v_ULTIMATE.start_atomic_store_~obj#1.offset_186|)) (not (= .cse25 (select (select (store .cse26 |c_~#stack~0.base| (store .cse27 .cse28 v_ArrVal_1787)) |threadThread1of1ForFork0_Pop_~#head2~0#1.base|) 0))) (< .cse14 |v_ULTIMATE.start_atomic_store_~obj#1.offset_187|) (< .cse28 0) (< .cse0 (+ .cse29 8 |c_~#stack~0.offset|)))))))))))) (or .cse5 (and (forall ((|v_ULTIMATE.start_atomic_store_~obj#1.offset_186| Int)) (or (< .cse8 (+ 4 |v_ULTIMATE.start_atomic_store_~obj#1.offset_186|)) (forall ((v_ArrVal_1783 Int) (v_ArrVal_1785 (Array Int Int)) (v_ArrVal_1787 Int) (|threadThread1of1ForFork0_Pop_~#head2~0#1.base| Int)) (let ((.cse31 (store (store |c_#memory_int| |c_~#stack~0.base| (store .cse2 |v_ULTIMATE.start_atomic_store_~obj#1.offset_186| v_ArrVal_1783)) |c_~#threads~0.base| v_ArrVal_1785))) (let ((.cse32 (select .cse31 |c_~#stack~0.base|))) (let ((.cse30 (select .cse32 .cse7))) (let ((.cse33 (* .cse30 8))) (or (not (= .cse30 (select (select (store .cse31 |c_~#stack~0.base| (store .cse32 (+ .cse33 |c_~#stack~0.offset| 4) v_ArrVal_1787)) |threadThread1of1ForFork0_Pop_~#head2~0#1.base|) 0))) (< .cse0 (+ .cse33 8 |c_~#stack~0.offset|)) (< .cse30 4))))))))) (or .cse6 (forall ((|v_ULTIMATE.start_atomic_store_~obj#1.offset_186| Int) (v_ArrVal_1783 Int) (v_ArrVal_1785 (Array Int Int)) (v_ArrVal_1787 Int) (|threadThread1of1ForFork0_Pop_~#head2~0#1.base| Int)) (let ((.cse35 (store (store |c_#memory_int| |c_~#stack~0.base| (store .cse2 |v_ULTIMATE.start_atomic_store_~obj#1.offset_186| v_ArrVal_1783)) |c_~#threads~0.base| v_ArrVal_1785))) (let ((.cse36 (select .cse35 |c_~#stack~0.base|))) (let ((.cse34 (select .cse36 .cse7))) (let ((.cse38 (* .cse34 8))) (let ((.cse37 (+ .cse38 |c_~#stack~0.offset| 4))) (or (< .cse8 (+ 4 |v_ULTIMATE.start_atomic_store_~obj#1.offset_186|)) (not (= .cse34 (select (select (store .cse35 |c_~#stack~0.base| (store .cse36 .cse37 v_ArrVal_1787)) |threadThread1of1ForFork0_Pop_~#head2~0#1.base|) 0))) (< .cse37 0) (< .cse0 (+ .cse38 8 |c_~#stack~0.offset|)))))))))))) (<= |c_threadThread1of1ForFork0_Pop_~head1~0#1| 0) (<= 0 |c_threadThread1of1ForFork0_~elem~0#1|) (= |c_~#stack~0.offset| 0) (<= 0 |c_threadThread1of1ForFork0_Pop_~head1~0#1|) (or .cse5 (and (forall ((v_ArrVal_1785 (Array Int Int)) (v_ArrVal_1787 Int) (|threadThread1of1ForFork0_Pop_~#head2~0#1.base| Int)) (let ((.cse41 (store |c_#memory_int| |c_~#threads~0.base| v_ArrVal_1785))) (let ((.cse42 (select .cse41 |c_~#stack~0.base|))) (let ((.cse40 (select .cse42 .cse7))) (let ((.cse39 (* 8 .cse40))) (or (< .cse0 (+ .cse39 8 |c_~#stack~0.offset|)) (< .cse40 4) (not (= (select (select (store .cse41 |c_~#stack~0.base| (store .cse42 (+ .cse39 |c_~#stack~0.offset| 4) v_ArrVal_1787)) |threadThread1of1ForFork0_Pop_~#head2~0#1.base|) 0) .cse40)))))))) (or (forall ((v_ArrVal_1785 (Array Int Int)) (v_ArrVal_1787 Int) (|threadThread1of1ForFork0_Pop_~#head2~0#1.base| Int)) (let ((.cse45 (store |c_#memory_int| |c_~#threads~0.base| v_ArrVal_1785))) (let ((.cse46 (select .cse45 |c_~#stack~0.base|))) (let ((.cse47 (select .cse46 .cse7))) (let ((.cse43 (* 8 .cse47))) (let ((.cse44 (+ .cse43 |c_~#stack~0.offset| 4))) (or (< .cse0 (+ .cse43 8 |c_~#stack~0.offset|)) (< .cse44 0) (not (= (select (select (store .cse45 |c_~#stack~0.base| (store .cse46 .cse44 v_ArrVal_1787)) |threadThread1of1ForFork0_Pop_~#head2~0#1.base|) 0) .cse47))))))))) .cse6))) (<= 0 |c_threadThread1of1ForFork0_Push_~index#1|)))) is different from false [2023-08-29 21:13:03,814 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 [0] [2023-08-29 21:13:06,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 21:13:08,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 21:13:25,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 21:13:28,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 21:13:30,391 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 [0] [2023-08-29 21:13:43,477 INFO L130 PetriNetUnfolder]: 687/2423 cut-off events. [2023-08-29 21:13:43,477 INFO L131 PetriNetUnfolder]: For 30141/30141 co-relation queries the response was YES. [2023-08-29 21:13:43,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18194 conditions, 2423 events. 687/2423 cut-off events. For 30141/30141 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 16069 event pairs, 45 based on Foata normal form. 0/2395 useless extension candidates. Maximal degree in co-relation 18111. Up to 594 conditions per place. [2023-08-29 21:13:43,501 INFO L137 encePairwiseOnDemand]: 714/741 looper letters, 511 selfloop transitions, 329 changer transitions 4/845 dead transitions. [2023-08-29 21:13:43,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 845 transitions, 14901 flow [2023-08-29 21:13:43,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-08-29 21:13:43,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-08-29 21:13:43,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 10295 transitions. [2023-08-29 21:13:43,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.19568151147098514 [2023-08-29 21:13:43,512 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 10295 transitions. [2023-08-29 21:13:43,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 10295 transitions. [2023-08-29 21:13:43,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:13:43,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 10295 transitions. [2023-08-29 21:13:43,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 145.0) internal successors, (10295), 71 states have internal predecessors, (10295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:13:43,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 741.0) internal successors, (53352), 72 states have internal predecessors, (53352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:13:43,562 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 741.0) internal successors, (53352), 72 states have internal predecessors, (53352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:13:43,562 INFO L175 Difference]: Start difference. First operand has 344 places, 414 transitions, 6929 flow. Second operand 71 states and 10295 transitions. [2023-08-29 21:13:43,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 845 transitions, 14901 flow [2023-08-29 21:13:43,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 845 transitions, 13662 flow, removed 95 selfloop flow, removed 37 redundant places. [2023-08-29 21:13:43,792 INFO L231 Difference]: Finished difference. Result has 395 places, 629 transitions, 10792 flow [2023-08-29 21:13:43,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=741, PETRI_DIFFERENCE_MINUEND_FLOW=6279, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=10792, PETRI_PLACES=395, PETRI_TRANSITIONS=629} [2023-08-29 21:13:43,793 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 289 predicate places. [2023-08-29 21:13:43,793 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 629 transitions, 10792 flow [2023-08-29 21:13:43,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 142.77142857142857) internal successors, (9994), 70 states have internal predecessors, (9994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:13:43,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:13:43,795 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:13:43,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-29 21:13:44,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:13:44,002 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting threadErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-29 21:13:44,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:13:44,003 INFO L85 PathProgramCache]: Analyzing trace with hash 339847256, now seen corresponding path program 2 times [2023-08-29 21:13:44,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:13:44,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472487728] [2023-08-29 21:13:44,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:13:44,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:13:44,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:13:46,000 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 21:13:46,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:13:46,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472487728] [2023-08-29 21:13:46,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472487728] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:13:46,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135773221] [2023-08-29 21:13:46,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 21:13:46,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:13:46,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:13:46,003 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:13:46,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-29 21:13:46,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 21:13:46,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 21:13:46,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 142 conjunts are in the unsatisfiable core [2023-08-29 21:13:46,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:13:46,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-08-29 21:13:46,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:13:46,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:13:46,355 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 18 [2023-08-29 21:13:46,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:13:46,414 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 18 [2023-08-29 21:13:46,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:13:46,481 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 18 [2023-08-29 21:13:46,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:13:46,543 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 14 treesize of output 16 [2023-08-29 21:13:46,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-29 21:13:47,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-29 21:13:47,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:13:47,300 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 18 [2023-08-29 21:13:47,534 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 21:13:47,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2023-08-29 21:13:47,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:13:47,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:13:47,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:13:47,800 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-29 21:13:47,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 28 [2023-08-29 21:13:47,969 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:13:47,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:13:48,074 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-29 21:13:48,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 116 [2023-08-29 21:13:48,625 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:13:48,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 53 [2023-08-29 21:13:50,816 INFO L321 Elim1Store]: treesize reduction 438, result has 38.6 percent of original size [2023-08-29 21:13:50,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 1133 treesize of output 1132 [2023-08-29 21:13:51,066 INFO L321 Elim1Store]: treesize reduction 174, result has 29.0 percent of original size [2023-08-29 21:13:51,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 14 case distinctions, treesize of input 327 treesize of output 367 [2023-08-29 21:13:51,198 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:13:51,199 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 7305 treesize of output 7297 [2023-08-29 21:13:51,344 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:13:51,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 307 treesize of output 294 [2023-08-29 21:13:51,390 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 283 treesize of output 279 [2023-08-29 21:13:53,221 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 8 treesize of output 6 [2023-08-29 21:14:13,684 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 1343 treesize of output 1337 [2023-08-29 21:14:24,832 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:14:24,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 625 treesize of output 875 [2023-08-29 21:16:45,005 WARN L222 SmtUtils]: Spent 12.32s on a formula simplification. DAG size of input: 598 DAG size of output: 702 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-29 21:18:47,400 WARN L222 SmtUtils]: Spent 12.08s on a formula simplification. DAG size of input: 596 DAG size of output: 690 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15