./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread-ext/46_monabsex2_vs.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-ext/46_monabsex2_vs.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 134e9604c8f91a200c8250c9fbb45867ed525dc78e65c16e0a5fa44f5d71ac67 --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 20:09:42,734 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 20:09:42,735 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 20:09:42,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 20:09:42,753 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 20:09:42,759 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 20:09:42,759 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 20:09:42,761 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 20:09:42,762 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 20:09:42,762 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 20:09:42,763 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 20:09:42,763 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 20:09:42,764 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 20:09:42,764 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 20:09:42,765 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 20:09:42,766 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 20:09:42,766 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 20:09:42,767 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 20:09:42,768 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 20:09:42,769 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 20:09:42,770 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 20:09:42,771 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 20:09:42,771 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 20:09:42,772 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 20:09:42,790 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 20:09:42,790 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 20:09:42,790 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 20:09:42,791 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 20:09:42,791 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 20:09:42,792 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 20:09:42,792 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 20:09:42,793 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 20:09:42,793 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 20:09:42,793 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 20:09:42,794 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 20:09:42,794 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 20:09:42,795 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 20:09:42,795 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 20:09:42,795 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 20:09:42,796 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 20:09:42,796 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 20:09:42,797 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 20:09:42,816 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 20:09:42,817 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 20:09:42,818 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 20:09:42,819 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 20:09:42,819 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 20:09:42,819 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 20:09:42,820 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 20:09:42,821 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 20:09:42,821 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 20:09:42,821 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 20:09:42,821 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 20:09:42,822 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 20:09:42,822 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 20:09:42,822 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 20:09:42,822 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 20:09:42,822 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 20:09:42,822 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 20:09:42,823 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 20:09:42,823 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 20:09:42,823 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 20:09:42,823 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 20:09:42,823 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 20:09:42,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 20:09:42,823 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 20:09:42,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 20:09:42,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 20:09:42,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 20:09:42,824 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 20:09:42,824 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 20:09:42,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 20:09:42,825 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 20:09:42,825 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 20:09:42,825 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 20:09:42,825 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 20:09:42,825 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 134e9604c8f91a200c8250c9fbb45867ed525dc78e65c16e0a5fa44f5d71ac67 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 20:09:43,085 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 20:09:43,104 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 20:09:43,106 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 20:09:43,107 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 20:09:43,107 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 20:09:43,108 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/46_monabsex2_vs.i [2023-08-29 20:09:44,077 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 20:09:44,259 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 20:09:44,259 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/46_monabsex2_vs.i [2023-08-29 20:09:44,282 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/179f805ff/7269aabd86dc44cd9c678ea5851abb23/FLAGbe46ac637 [2023-08-29 20:09:44,297 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/179f805ff/7269aabd86dc44cd9c678ea5851abb23 [2023-08-29 20:09:44,299 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 20:09:44,300 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 20:09:44,301 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 20:09:44,301 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 20:09:44,303 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 20:09:44,303 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 08:09:44" (1/1) ... [2023-08-29 20:09:44,305 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@660ececd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:09:44, skipping insertion in model container [2023-08-29 20:09:44,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 08:09:44" (1/1) ... [2023-08-29 20:09:44,309 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 20:09:44,343 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 20:09:44,454 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-29 20:09:44,520 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-ext/46_monabsex2_vs.i[30494,30507] [2023-08-29 20:09:44,526 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 20:09:44,532 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 20:09:44,541 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-29 20:09:44,552 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-ext/46_monabsex2_vs.i[30494,30507] [2023-08-29 20:09:44,554 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 20:09:44,581 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 20:09:44,581 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 20:09:44,582 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 20:09:44,586 INFO L208 MainTranslator]: Completed translation [2023-08-29 20:09:44,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:09:44 WrapperNode [2023-08-29 20:09:44,586 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 20:09:44,587 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 20:09:44,587 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 20:09:44,587 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 20:09:44,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:09:44" (1/1) ... [2023-08-29 20:09:44,614 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:09:44" (1/1) ... [2023-08-29 20:09:44,628 INFO L138 Inliner]: procedures = 170, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2023-08-29 20:09:44,629 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 20:09:44,629 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 20:09:44,630 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 20:09:44,630 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 20:09:44,635 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:09:44" (1/1) ... [2023-08-29 20:09:44,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:09:44" (1/1) ... [2023-08-29 20:09:44,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:09:44" (1/1) ... [2023-08-29 20:09:44,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:09:44" (1/1) ... [2023-08-29 20:09:44,650 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:09:44" (1/1) ... [2023-08-29 20:09:44,653 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:09:44" (1/1) ... [2023-08-29 20:09:44,657 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:09:44" (1/1) ... [2023-08-29 20:09:44,657 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:09:44" (1/1) ... [2023-08-29 20:09:44,662 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 20:09:44,664 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 20:09:44,664 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 20:09:44,664 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 20:09:44,665 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:09:44" (1/1) ... [2023-08-29 20:09:44,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 20:09:44,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 20:09:44,707 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 20:09:44,711 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 20:09:44,755 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-29 20:09:44,755 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-29 20:09:44,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 20:09:44,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-29 20:09:44,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 20:09:44,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 20:09:44,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 20:09:44,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 20:09:44,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-29 20:09:44,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 20:09:44,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 20:09:44,757 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 20:09:44,830 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 20:09:44,831 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 20:09:44,958 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 20:09:44,985 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 20:09:44,985 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-29 20:09:44,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 08:09:44 BoogieIcfgContainer [2023-08-29 20:09:44,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 20:09:44,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 20:09:44,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 20:09:44,990 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 20:09:44,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 08:09:44" (1/3) ... [2023-08-29 20:09:44,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dec8bf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 08:09:44, skipping insertion in model container [2023-08-29 20:09:44,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:09:44" (2/3) ... [2023-08-29 20:09:44,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dec8bf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 08:09:44, skipping insertion in model container [2023-08-29 20:09:44,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 08:09:44" (3/3) ... [2023-08-29 20:09:44,992 INFO L112 eAbstractionObserver]: Analyzing ICFG 46_monabsex2_vs.i [2023-08-29 20:09:45,009 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 20:09:45,009 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-08-29 20:09:45,009 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 20:09:45,062 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 20:09:45,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 39 transitions, 83 flow [2023-08-29 20:09:45,122 INFO L130 PetriNetUnfolder]: 2/54 cut-off events. [2023-08-29 20:09:45,122 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:09:45,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 54 events. 2/54 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 81 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 28. Up to 4 conditions per place. [2023-08-29 20:09:45,125 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 39 transitions, 83 flow [2023-08-29 20:09:45,128 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 39 transitions, 83 flow [2023-08-29 20:09:45,131 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 20:09:45,140 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 41 places, 39 transitions, 83 flow [2023-08-29 20:09:45,146 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 41 places, 39 transitions, 83 flow [2023-08-29 20:09:45,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 39 transitions, 83 flow [2023-08-29 20:09:45,166 INFO L130 PetriNetUnfolder]: 2/54 cut-off events. [2023-08-29 20:09:45,166 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:09:45,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 54 events. 2/54 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 81 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 28. Up to 4 conditions per place. [2023-08-29 20:09:45,168 INFO L119 LiptonReduction]: Number of co-enabled transitions 252 [2023-08-29 20:09:46,162 INFO L134 LiptonReduction]: Checked pairs total: 217 [2023-08-29 20:09:46,163 INFO L136 LiptonReduction]: Total number of compositions: 36 [2023-08-29 20:09:46,178 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 20:09:46,183 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;@77458983, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 20:09:46,183 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-29 20:09:46,184 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 20:09:46,185 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:09:46,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:09:46,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 20:09:46,186 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 2 more)] === [2023-08-29 20:09:46,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:09:46,189 INFO L85 PathProgramCache]: Analyzing trace with hash 5529, now seen corresponding path program 1 times [2023-08-29 20:09:46,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:09:46,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966798966] [2023-08-29 20:09:46,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:09:46,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:09:46,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:09:46,416 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 20:09:46,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:09:46,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966798966] [2023-08-29 20:09:46,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966798966] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:09:46,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:09:46,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:09:46,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419900172] [2023-08-29 20:09:46,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:09:46,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:09:46,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:09:46,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:09:46,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:09:46,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 75 [2023-08-29 20:09:46,461 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 11 transitions, 27 flow. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 20:09:46,461 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:09:46,461 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 75 [2023-08-29 20:09:46,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:09:46,484 INFO L130 PetriNetUnfolder]: 6/22 cut-off events. [2023-08-29 20:09:46,484 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:09:46,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 22 events. 6/22 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 47 event pairs, 6 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 34. Up to 21 conditions per place. [2023-08-29 20:09:46,485 INFO L137 encePairwiseOnDemand]: 71/75 looper letters, 6 selfloop transitions, 1 changer transitions 0/8 dead transitions. [2023-08-29 20:09:46,485 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 13 places, 8 transitions, 35 flow [2023-08-29 20:09:46,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:09:46,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:09:46,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2023-08-29 20:09:46,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-08-29 20:09:46,495 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 100 transitions. [2023-08-29 20:09:46,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 100 transitions. [2023-08-29 20:09:46,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:09:46,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 100 transitions. [2023-08-29 20:09:46,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 20:09:46,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states 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 20:09:46,504 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states 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 20:09:46,505 INFO L175 Difference]: Start difference. First operand has 14 places, 11 transitions, 27 flow. Second operand 3 states and 100 transitions. [2023-08-29 20:09:46,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 13 places, 8 transitions, 35 flow [2023-08-29 20:09:46,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 8 transitions, 35 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 20:09:46,509 INFO L231 Difference]: Finished difference. Result has 13 places, 8 transitions, 23 flow [2023-08-29 20:09:46,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=21, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=23, PETRI_PLACES=13, PETRI_TRANSITIONS=8} [2023-08-29 20:09:46,513 INFO L281 CegarLoopForPetriNet]: 14 programPoint places, -1 predicate places. [2023-08-29 20:09:46,513 INFO L495 AbstractCegarLoop]: Abstraction has has 13 places, 8 transitions, 23 flow [2023-08-29 20:09:46,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 20:09:46,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:09:46,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 20:09:46,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 20:09:46,515 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 2 more)] === [2023-08-29 20:09:46,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:09:46,516 INFO L85 PathProgramCache]: Analyzing trace with hash 5528, now seen corresponding path program 1 times [2023-08-29 20:09:46,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:09:46,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495085304] [2023-08-29 20:09:46,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:09:46,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:09:46,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:09:46,564 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 20:09:46,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:09:46,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495085304] [2023-08-29 20:09:46,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495085304] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:09:46,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:09:46,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:09:46,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223287070] [2023-08-29 20:09:46,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:09:46,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:09:46,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:09:46,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:09:46,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:09:46,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 75 [2023-08-29 20:09:46,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 13 places, 8 transitions, 23 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 20:09:46,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:09:46,582 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 75 [2023-08-29 20:09:46,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:09:46,589 INFO L130 PetriNetUnfolder]: 4/16 cut-off events. [2023-08-29 20:09:46,589 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:09:46,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 16 events. 4/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 25 event pairs, 4 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 32. Up to 15 conditions per place. [2023-08-29 20:09:46,589 INFO L137 encePairwiseOnDemand]: 73/75 looper letters, 4 selfloop transitions, 1 changer transitions 1/7 dead transitions. [2023-08-29 20:09:46,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 14 places, 7 transitions, 33 flow [2023-08-29 20:09:46,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:09:46,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:09:46,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2023-08-29 20:09:46,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40444444444444444 [2023-08-29 20:09:46,591 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 91 transitions. [2023-08-29 20:09:46,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 91 transitions. [2023-08-29 20:09:46,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:09:46,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 91 transitions. [2023-08-29 20:09:46,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states 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 20:09:46,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states 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 20:09:46,593 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states 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 20:09:46,593 INFO L175 Difference]: Start difference. First operand has 13 places, 8 transitions, 23 flow. Second operand 3 states and 91 transitions. [2023-08-29 20:09:46,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 14 places, 7 transitions, 33 flow [2023-08-29 20:09:46,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 7 transitions, 32 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 20:09:46,593 INFO L231 Difference]: Finished difference. Result has 13 places, 6 transitions, 20 flow [2023-08-29 20:09:46,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=20, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=20, PETRI_PLACES=13, PETRI_TRANSITIONS=6} [2023-08-29 20:09:46,594 INFO L281 CegarLoopForPetriNet]: 14 programPoint places, -1 predicate places. [2023-08-29 20:09:46,594 INFO L495 AbstractCegarLoop]: Abstraction has has 13 places, 6 transitions, 20 flow [2023-08-29 20:09:46,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 20:09:46,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:09:46,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 20:09:46,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 20:09:46,595 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 2 more)] === [2023-08-29 20:09:46,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:09:46,595 INFO L85 PathProgramCache]: Analyzing trace with hash 5314877, now seen corresponding path program 1 times [2023-08-29 20:09:46,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:09:46,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363372067] [2023-08-29 20:09:46,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:09:46,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:09:46,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:09:46,651 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 20:09:46,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:09:46,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363372067] [2023-08-29 20:09:46,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363372067] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:09:46,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:09:46,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:09:46,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063535372] [2023-08-29 20:09:46,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:09:46,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:09:46,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:09:46,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:09:46,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:09:46,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 75 [2023-08-29 20:09:46,656 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 13 places, 6 transitions, 20 flow. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 20:09:46,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:09:46,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 75 [2023-08-29 20:09:46,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:09:46,674 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-29 20:09:46,675 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:09:46,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20 conditions, 6 events. 0/6 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 3/9 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2023-08-29 20:09:46,675 INFO L137 encePairwiseOnDemand]: 73/75 looper letters, 0 selfloop transitions, 0 changer transitions 5/5 dead transitions. [2023-08-29 20:09:46,675 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 13 places, 5 transitions, 26 flow [2023-08-29 20:09:46,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:09:46,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:09:46,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2023-08-29 20:09:46,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4488888888888889 [2023-08-29 20:09:46,677 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 101 transitions. [2023-08-29 20:09:46,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 101 transitions. [2023-08-29 20:09:46,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:09:46,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 101 transitions. [2023-08-29 20:09:46,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states 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 20:09:46,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states 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 20:09:46,679 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states 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 20:09:46,679 INFO L175 Difference]: Start difference. First operand has 13 places, 6 transitions, 20 flow. Second operand 3 states and 101 transitions. [2023-08-29 20:09:46,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 13 places, 5 transitions, 26 flow [2023-08-29 20:09:46,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 5 transitions, 25 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 20:09:46,679 INFO L231 Difference]: Finished difference. Result has 12 places, 0 transitions, 0 flow [2023-08-29 20:09:46,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=12, PETRI_TRANSITIONS=0} [2023-08-29 20:09:46,680 INFO L281 CegarLoopForPetriNet]: 14 programPoint places, -2 predicate places. [2023-08-29 20:09:46,680 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 0 transitions, 0 flow [2023-08-29 20:09:46,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 20:09:46,682 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 5 remaining) [2023-08-29 20:09:46,682 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 5 remaining) [2023-08-29 20:09:46,683 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 5 remaining) [2023-08-29 20:09:46,683 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 5 remaining) [2023-08-29 20:09:46,683 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 5 remaining) [2023-08-29 20:09:46,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 20:09:46,683 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-29 20:09:46,685 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 20:09:46,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 39 transitions, 83 flow [2023-08-29 20:09:46,693 INFO L130 PetriNetUnfolder]: 2/54 cut-off events. [2023-08-29 20:09:46,693 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:09:46,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 54 events. 2/54 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 81 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 28. Up to 4 conditions per place. [2023-08-29 20:09:46,693 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 39 transitions, 83 flow [2023-08-29 20:09:46,694 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 28 transitions, 61 flow [2023-08-29 20:09:46,694 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 20:09:46,694 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 31 places, 28 transitions, 61 flow [2023-08-29 20:09:46,694 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 31 places, 28 transitions, 61 flow [2023-08-29 20:09:46,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 28 transitions, 61 flow [2023-08-29 20:09:46,697 INFO L130 PetriNetUnfolder]: 0/32 cut-off events. [2023-08-29 20:09:46,697 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:09:46,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 32 events. 0/32 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 14 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2023-08-29 20:09:46,698 INFO L119 LiptonReduction]: Number of co-enabled transitions 98 [2023-08-29 20:09:47,476 INFO L134 LiptonReduction]: Checked pairs total: 91 [2023-08-29 20:09:47,476 INFO L136 LiptonReduction]: Total number of compositions: 26 [2023-08-29 20:09:47,477 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 20:09:47,478 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;@77458983, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 20:09:47,478 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 20:09:47,479 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2023-08-29 20:09:47,479 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:09:47,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:09:47,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 20:09:47,480 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 20:09:47,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:09:47,480 INFO L85 PathProgramCache]: Analyzing trace with hash 6066279, now seen corresponding path program 1 times [2023-08-29 20:09:47,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:09:47,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846946065] [2023-08-29 20:09:47,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:09:47,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:09:47,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 20:09:47,490 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 20:09:47,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 20:09:47,506 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 20:09:47,506 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 20:09:47,506 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 20:09:47,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 20:09:47,506 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 20:09:47,507 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 20:09:47,507 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 20:09:47,507 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-29 20:09:47,514 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 20:09:47,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 47 transitions, 106 flow [2023-08-29 20:09:47,525 INFO L130 PetriNetUnfolder]: 3/79 cut-off events. [2023-08-29 20:09:47,525 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 20:09:47,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 79 events. 3/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 142 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 55. Up to 6 conditions per place. [2023-08-29 20:09:47,525 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 47 transitions, 106 flow [2023-08-29 20:09:47,526 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 47 transitions, 106 flow [2023-08-29 20:09:47,526 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 20:09:47,526 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 51 places, 47 transitions, 106 flow [2023-08-29 20:09:47,526 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 51 places, 47 transitions, 106 flow [2023-08-29 20:09:47,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 47 transitions, 106 flow [2023-08-29 20:09:47,532 INFO L130 PetriNetUnfolder]: 3/79 cut-off events. [2023-08-29 20:09:47,533 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 20:09:47,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 79 events. 3/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 142 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 55. Up to 6 conditions per place. [2023-08-29 20:09:47,533 INFO L119 LiptonReduction]: Number of co-enabled transitions 616 [2023-08-29 20:09:48,178 INFO L134 LiptonReduction]: Checked pairs total: 1165 [2023-08-29 20:09:48,179 INFO L136 LiptonReduction]: Total number of compositions: 37 [2023-08-29 20:09:48,180 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 20:09:48,180 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;@77458983, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 20:09:48,180 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 20:09:48,181 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-29 20:09:48,181 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:09:48,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:09:48,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 20:09:48,182 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 20:09:48,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:09:48,182 INFO L85 PathProgramCache]: Analyzing trace with hash 9273, now seen corresponding path program 1 times [2023-08-29 20:09:48,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:09:48,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41101068] [2023-08-29 20:09:48,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:09:48,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:09:48,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:09:48,207 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 20:09:48,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:09:48,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41101068] [2023-08-29 20:09:48,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41101068] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:09:48,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:09:48,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:09:48,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693860857] [2023-08-29 20:09:48,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:09:48,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:09:48,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:09:48,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:09:48,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:09:48,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 84 [2023-08-29 20:09:48,224 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states 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 20:09:48,224 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:09:48,224 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 84 [2023-08-29 20:09:48,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:09:48,246 INFO L130 PetriNetUnfolder]: 66/158 cut-off events. [2023-08-29 20:09:48,246 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-08-29 20:09:48,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313 conditions, 158 events. 66/158 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 727 event pairs, 66 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 87. Up to 129 conditions per place. [2023-08-29 20:09:48,248 INFO L137 encePairwiseOnDemand]: 80/84 looper letters, 10 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-08-29 20:09:48,248 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 66 flow [2023-08-29 20:09:48,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:09:48,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:09:48,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 113 transitions. [2023-08-29 20:09:48,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2023-08-29 20:09:48,249 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 113 transitions. [2023-08-29 20:09:48,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 113 transitions. [2023-08-29 20:09:48,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:09:48,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 113 transitions. [2023-08-29 20:09:48,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:09:48,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states 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 20:09:48,251 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states 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 20:09:48,251 INFO L175 Difference]: Start difference. First operand has 24 places, 19 transitions, 50 flow. Second operand 3 states and 113 transitions. [2023-08-29 20:09:48,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 66 flow [2023-08-29 20:09:48,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 16 transitions, 64 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-29 20:09:48,252 INFO L231 Difference]: Finished difference. Result has 23 places, 16 transitions, 44 flow [2023-08-29 20:09:48,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=16} [2023-08-29 20:09:48,253 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, -1 predicate places. [2023-08-29 20:09:48,253 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 16 transitions, 44 flow [2023-08-29 20:09:48,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states 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 20:09:48,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:09:48,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 20:09:48,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 20:09:48,254 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 20:09:48,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:09:48,254 INFO L85 PathProgramCache]: Analyzing trace with hash 9274, now seen corresponding path program 1 times [2023-08-29 20:09:48,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:09:48,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545183809] [2023-08-29 20:09:48,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:09:48,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:09:48,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:09:48,279 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 20:09:48,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:09:48,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545183809] [2023-08-29 20:09:48,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545183809] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:09:48,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:09:48,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:09:48,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334706166] [2023-08-29 20:09:48,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:09:48,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:09:48,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:09:48,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:09:48,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:09:48,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 84 [2023-08-29 20:09:48,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 16 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 20:09:48,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:09:48,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 84 [2023-08-29 20:09:48,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:09:48,311 INFO L130 PetriNetUnfolder]: 39/105 cut-off events. [2023-08-29 20:09:48,312 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-29 20:09:48,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 105 events. 39/105 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 424 event pairs, 39 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 202. Up to 81 conditions per place. [2023-08-29 20:09:48,312 INFO L137 encePairwiseOnDemand]: 82/84 looper letters, 9 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-08-29 20:09:48,313 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 15 transitions, 62 flow [2023-08-29 20:09:48,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:09:48,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:09:48,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 116 transitions. [2023-08-29 20:09:48,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2023-08-29 20:09:48,314 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 116 transitions. [2023-08-29 20:09:48,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 116 transitions. [2023-08-29 20:09:48,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:09:48,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 116 transitions. [2023-08-29 20:09:48,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 20:09:48,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states 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 20:09:48,316 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states 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 20:09:48,316 INFO L175 Difference]: Start difference. First operand has 23 places, 16 transitions, 44 flow. Second operand 3 states and 116 transitions. [2023-08-29 20:09:48,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 15 transitions, 62 flow [2023-08-29 20:09:48,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 15 transitions, 61 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 20:09:48,317 INFO L231 Difference]: Finished difference. Result has 23 places, 15 transitions, 43 flow [2023-08-29 20:09:48,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=41, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=43, PETRI_PLACES=23, PETRI_TRANSITIONS=15} [2023-08-29 20:09:48,317 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, -1 predicate places. [2023-08-29 20:09:48,317 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 15 transitions, 43 flow [2023-08-29 20:09:48,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 20:09:48,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:09:48,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 20:09:48,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 20:09:48,318 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 20:09:48,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:09:48,319 INFO L85 PathProgramCache]: Analyzing trace with hash 8920431, now seen corresponding path program 1 times [2023-08-29 20:09:48,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:09:48,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083570000] [2023-08-29 20:09:48,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:09:48,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:09:48,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:09:48,351 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 20:09:48,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:09:48,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083570000] [2023-08-29 20:09:48,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083570000] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:09:48,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:09:48,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:09:48,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364452066] [2023-08-29 20:09:48,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:09:48,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:09:48,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:09:48,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:09:48,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:09:48,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 84 [2023-08-29 20:09:48,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 15 transitions, 43 flow. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 20:09:48,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:09:48,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 84 [2023-08-29 20:09:48,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:09:48,379 INFO L130 PetriNetUnfolder]: 22/66 cut-off events. [2023-08-29 20:09:48,380 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 20:09:48,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 66 events. 22/66 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 212 event pairs, 7 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 129. Up to 32 conditions per place. [2023-08-29 20:09:48,381 INFO L137 encePairwiseOnDemand]: 79/84 looper letters, 9 selfloop transitions, 3 changer transitions 4/21 dead transitions. [2023-08-29 20:09:48,381 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 21 transitions, 92 flow [2023-08-29 20:09:48,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:09:48,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:09:48,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2023-08-29 20:09:48,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-29 20:09:48,388 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 126 transitions. [2023-08-29 20:09:48,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 126 transitions. [2023-08-29 20:09:48,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:09:48,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 126 transitions. [2023-08-29 20:09:48,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 20:09:48,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states 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 20:09:48,391 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states 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 20:09:48,392 INFO L175 Difference]: Start difference. First operand has 23 places, 15 transitions, 43 flow. Second operand 3 states and 126 transitions. [2023-08-29 20:09:48,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 21 transitions, 92 flow [2023-08-29 20:09:48,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 21 transitions, 91 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 20:09:48,393 INFO L231 Difference]: Finished difference. Result has 25 places, 15 transitions, 55 flow [2023-08-29 20:09:48,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=55, PETRI_PLACES=25, PETRI_TRANSITIONS=15} [2023-08-29 20:09:48,393 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1 predicate places. [2023-08-29 20:09:48,394 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 15 transitions, 55 flow [2023-08-29 20:09:48,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 20:09:48,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:09:48,396 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 20:09:48,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 20:09:48,397 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 20:09:48,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:09:48,397 INFO L85 PathProgramCache]: Analyzing trace with hash 927744484, now seen corresponding path program 1 times [2023-08-29 20:09:48,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:09:48,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904913760] [2023-08-29 20:09:48,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:09:48,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:09:48,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:09:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 20:09:48,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:09:48,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904913760] [2023-08-29 20:09:48,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904913760] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:09:48,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:09:48,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 20:09:48,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821601037] [2023-08-29 20:09:48,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:09:48,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:09:48,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:09:48,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:09:48,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:09:48,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 84 [2023-08-29 20:09:48,450 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 15 transitions, 55 flow. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 20:09:48,450 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:09:48,450 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 84 [2023-08-29 20:09:48,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:09:48,473 INFO L130 PetriNetUnfolder]: 36/84 cut-off events. [2023-08-29 20:09:48,475 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-29 20:09:48,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 84 events. 36/84 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 291 event pairs, 9 based on Foata normal form. 4/85 useless extension candidates. Maximal degree in co-relation 202. Up to 55 conditions per place. [2023-08-29 20:09:48,476 INFO L137 encePairwiseOnDemand]: 80/84 looper letters, 0 selfloop transitions, 0 changer transitions 19/19 dead transitions. [2023-08-29 20:09:48,477 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 19 transitions, 96 flow [2023-08-29 20:09:48,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:09:48,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:09:48,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2023-08-29 20:09:48,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-29 20:09:48,478 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 126 transitions. [2023-08-29 20:09:48,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 126 transitions. [2023-08-29 20:09:48,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:09:48,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 126 transitions. [2023-08-29 20:09:48,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 20:09:48,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states 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 20:09:48,480 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states 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 20:09:48,480 INFO L175 Difference]: Start difference. First operand has 25 places, 15 transitions, 55 flow. Second operand 3 states and 126 transitions. [2023-08-29 20:09:48,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 19 transitions, 96 flow [2023-08-29 20:09:48,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 90 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 20:09:48,482 INFO L231 Difference]: Finished difference. Result has 23 places, 0 transitions, 0 flow [2023-08-29 20:09:48,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=41, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=23, PETRI_TRANSITIONS=0} [2023-08-29 20:09:48,483 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, -1 predicate places. [2023-08-29 20:09:48,483 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 0 transitions, 0 flow [2023-08-29 20:09:48,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 20:09:48,483 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 6 remaining) [2023-08-29 20:09:48,483 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 6 remaining) [2023-08-29 20:09:48,483 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 6 remaining) [2023-08-29 20:09:48,484 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (2 of 6 remaining) [2023-08-29 20:09:48,484 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 6 remaining) [2023-08-29 20:09:48,484 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 6 remaining) [2023-08-29 20:09:48,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 20:09:48,487 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-29 20:09:48,487 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 20:09:48,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 47 transitions, 106 flow [2023-08-29 20:09:48,494 INFO L130 PetriNetUnfolder]: 3/79 cut-off events. [2023-08-29 20:09:48,496 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 20:09:48,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 79 events. 3/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 142 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 55. Up to 6 conditions per place. [2023-08-29 20:09:48,496 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 47 transitions, 106 flow [2023-08-29 20:09:48,497 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 36 transitions, 84 flow [2023-08-29 20:09:48,497 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 20:09:48,497 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 41 places, 36 transitions, 84 flow [2023-08-29 20:09:48,499 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 41 places, 36 transitions, 84 flow [2023-08-29 20:09:48,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 36 transitions, 84 flow [2023-08-29 20:09:48,504 INFO L130 PetriNetUnfolder]: 0/46 cut-off events. [2023-08-29 20:09:48,504 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 20:09:48,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 46 events. 0/46 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 30 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2023-08-29 20:09:48,505 INFO L119 LiptonReduction]: Number of co-enabled transitions 308 [2023-08-29 20:09:49,249 INFO L134 LiptonReduction]: Checked pairs total: 717 [2023-08-29 20:09:49,250 INFO L136 LiptonReduction]: Total number of compositions: 27 [2023-08-29 20:09:49,251 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 20:09:49,251 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;@77458983, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 20:09:49,251 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 20:09:49,252 INFO L130 PetriNetUnfolder]: 0/14 cut-off events. [2023-08-29 20:09:49,253 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 20:09:49,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:09:49,253 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-08-29 20:09:49,253 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 20:09:49,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:09:49,253 INFO L85 PathProgramCache]: Analyzing trace with hash -201258530, now seen corresponding path program 1 times [2023-08-29 20:09:49,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:09:49,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497974861] [2023-08-29 20:09:49,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:09:49,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:09:49,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 20:09:49,272 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 20:09:49,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 20:09:49,278 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 20:09:49,279 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 20:09:49,279 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 20:09:49,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 20:09:49,279 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 20:09:49,279 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 20:09:49,280 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 20:09:49,280 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-29 20:09:49,291 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 20:09:49,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 55 transitions, 131 flow [2023-08-29 20:09:49,297 INFO L130 PetriNetUnfolder]: 4/104 cut-off events. [2023-08-29 20:09:49,297 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 20:09:49,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 104 events. 4/104 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 208 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 83. Up to 8 conditions per place. [2023-08-29 20:09:49,298 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 55 transitions, 131 flow [2023-08-29 20:09:49,298 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 61 places, 55 transitions, 131 flow [2023-08-29 20:09:49,298 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 20:09:49,298 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 61 places, 55 transitions, 131 flow [2023-08-29 20:09:49,298 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 61 places, 55 transitions, 131 flow [2023-08-29 20:09:49,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 55 transitions, 131 flow [2023-08-29 20:09:49,303 INFO L130 PetriNetUnfolder]: 4/104 cut-off events. [2023-08-29 20:09:49,303 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 20:09:49,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 104 events. 4/104 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 208 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 83. Up to 8 conditions per place. [2023-08-29 20:09:49,304 INFO L119 LiptonReduction]: Number of co-enabled transitions 1092 [2023-08-29 20:09:50,078 INFO L134 LiptonReduction]: Checked pairs total: 2479 [2023-08-29 20:09:50,079 INFO L136 LiptonReduction]: Total number of compositions: 41 [2023-08-29 20:09:50,082 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 20:09:50,083 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;@77458983, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 20:09:50,083 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-29 20:09:50,085 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 20:09:50,086 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:09:50,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:09:50,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 20:09:50,086 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 20:09:50,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:09:50,086 INFO L85 PathProgramCache]: Analyzing trace with hash 13495, now seen corresponding path program 1 times [2023-08-29 20:09:50,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:09:50,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159275090] [2023-08-29 20:09:50,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:09:50,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:09:50,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:09:50,128 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 20:09:50,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:09:50,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159275090] [2023-08-29 20:09:50,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159275090] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:09:50,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:09:50,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:09:50,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777127491] [2023-08-29 20:09:50,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:09:50,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:09:50,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:09:50,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:09:50,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:09:50,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 96 [2023-08-29 20:09:50,150 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 20:09:50,150 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:09:50,150 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 96 [2023-08-29 20:09:50,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:09:50,218 INFO L130 PetriNetUnfolder]: 450/826 cut-off events. [2023-08-29 20:09:50,218 INFO L131 PetriNetUnfolder]: For 142/142 co-relation queries the response was YES. [2023-08-29 20:09:50,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1662 conditions, 826 events. 450/826 cut-off events. For 142/142 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 4776 event pairs, 450 based on Foata normal form. 0/528 useless extension candidates. Maximal degree in co-relation 318. Up to 705 conditions per place. [2023-08-29 20:09:50,223 INFO L137 encePairwiseOnDemand]: 92/96 looper letters, 14 selfloop transitions, 1 changer transitions 0/21 dead transitions. [2023-08-29 20:09:50,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 21 transitions, 93 flow [2023-08-29 20:09:50,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:09:50,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:09:50,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 132 transitions. [2023-08-29 20:09:50,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2023-08-29 20:09:50,224 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 132 transitions. [2023-08-29 20:09:50,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 132 transitions. [2023-08-29 20:09:50,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:09:50,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 132 transitions. [2023-08-29 20:09:50,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 20:09:50,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states 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 20:09:50,226 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states 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 20:09:50,226 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 69 flow. Second operand 3 states and 132 transitions. [2023-08-29 20:09:50,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 21 transitions, 93 flow [2023-08-29 20:09:50,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 21 transitions, 87 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-29 20:09:50,228 INFO L231 Difference]: Finished difference. Result has 30 places, 21 transitions, 59 flow [2023-08-29 20:09:50,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=30, PETRI_TRANSITIONS=21} [2023-08-29 20:09:50,230 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -1 predicate places. [2023-08-29 20:09:50,230 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 21 transitions, 59 flow [2023-08-29 20:09:50,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 20:09:50,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:09:50,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 20:09:50,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 20:09:50,230 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 20:09:50,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:09:50,231 INFO L85 PathProgramCache]: Analyzing trace with hash 13497, now seen corresponding path program 1 times [2023-08-29 20:09:50,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:09:50,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001987407] [2023-08-29 20:09:50,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:09:50,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:09:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:09:50,269 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 20:09:50,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:09:50,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001987407] [2023-08-29 20:09:50,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001987407] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:09:50,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:09:50,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:09:50,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111452171] [2023-08-29 20:09:50,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:09:50,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:09:50,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:09:50,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:09:50,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:09:50,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 96 [2023-08-29 20:09:50,280 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 21 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 20:09:50,280 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:09:50,280 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 96 [2023-08-29 20:09:50,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:09:50,314 INFO L130 PetriNetUnfolder]: 279/549 cut-off events. [2023-08-29 20:09:50,314 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-29 20:09:50,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1083 conditions, 549 events. 279/549 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2969 event pairs, 279 based on Foata normal form. 0/393 useless extension candidates. Maximal degree in co-relation 1074. Up to 449 conditions per place. [2023-08-29 20:09:50,316 INFO L137 encePairwiseOnDemand]: 94/96 looper letters, 13 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2023-08-29 20:09:50,317 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 20 transitions, 85 flow [2023-08-29 20:09:50,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:09:50,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:09:50,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 135 transitions. [2023-08-29 20:09:50,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2023-08-29 20:09:50,318 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 135 transitions. [2023-08-29 20:09:50,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 135 transitions. [2023-08-29 20:09:50,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:09:50,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 135 transitions. [2023-08-29 20:09:50,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 20:09:50,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states 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 20:09:50,319 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states 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 20:09:50,319 INFO L175 Difference]: Start difference. First operand has 30 places, 21 transitions, 59 flow. Second operand 3 states and 135 transitions. [2023-08-29 20:09:50,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 20 transitions, 85 flow [2023-08-29 20:09:50,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 20 transitions, 84 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 20:09:50,320 INFO L231 Difference]: Finished difference. Result has 30 places, 20 transitions, 58 flow [2023-08-29 20:09:50,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=30, PETRI_TRANSITIONS=20} [2023-08-29 20:09:50,320 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -1 predicate places. [2023-08-29 20:09:50,320 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 20 transitions, 58 flow [2023-08-29 20:09:50,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 20:09:50,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:09:50,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 20:09:50,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 20:09:50,321 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 20:09:50,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:09:50,321 INFO L85 PathProgramCache]: Analyzing trace with hash 12980849, now seen corresponding path program 1 times [2023-08-29 20:09:50,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:09:50,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019462286] [2023-08-29 20:09:50,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:09:50,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:09:50,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:09:50,347 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 20:09:50,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:09:50,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019462286] [2023-08-29 20:09:50,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019462286] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:09:50,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:09:50,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:09:50,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610707765] [2023-08-29 20:09:50,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:09:50,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:09:50,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:09:50,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:09:50,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:09:50,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 96 [2023-08-29 20:09:50,352 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 20 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 20:09:50,352 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:09:50,352 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 96 [2023-08-29 20:09:50,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:09:50,391 INFO L130 PetriNetUnfolder]: 162/314 cut-off events. [2023-08-29 20:09:50,391 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2023-08-29 20:09:50,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 652 conditions, 314 events. 162/314 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1409 event pairs, 41 based on Foata normal form. 0/261 useless extension candidates. Maximal degree in co-relation 642. Up to 226 conditions per place. [2023-08-29 20:09:50,392 INFO L137 encePairwiseOnDemand]: 89/96 looper letters, 19 selfloop transitions, 4 changer transitions 0/29 dead transitions. [2023-08-29 20:09:50,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 132 flow [2023-08-29 20:09:50,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:09:50,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:09:50,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 146 transitions. [2023-08-29 20:09:50,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069444444444444 [2023-08-29 20:09:50,393 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 146 transitions. [2023-08-29 20:09:50,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 146 transitions. [2023-08-29 20:09:50,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:09:50,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 146 transitions. [2023-08-29 20:09:50,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states 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 20:09:50,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states 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 20:09:50,395 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states 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 20:09:50,395 INFO L175 Difference]: Start difference. First operand has 30 places, 20 transitions, 58 flow. Second operand 3 states and 146 transitions. [2023-08-29 20:09:50,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 132 flow [2023-08-29 20:09:50,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 131 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 20:09:50,396 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 87 flow [2023-08-29 20:09:50,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2023-08-29 20:09:50,396 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 1 predicate places. [2023-08-29 20:09:50,396 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 87 flow [2023-08-29 20:09:50,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 20:09:50,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:09:50,397 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 20:09:50,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 20:09:50,397 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 20:09:50,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:09:50,397 INFO L85 PathProgramCache]: Analyzing trace with hash -735467468, now seen corresponding path program 1 times [2023-08-29 20:09:50,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:09:50,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761441545] [2023-08-29 20:09:50,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:09:50,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:09:50,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:09:50,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 20:09:50,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:09:50,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761441545] [2023-08-29 20:09:50,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761441545] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:09:50,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:09:50,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 20:09:50,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299957445] [2023-08-29 20:09:50,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:09:50,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:09:50,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:09:50,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:09:50,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:09:50,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 96 [2023-08-29 20:09:50,424 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 20:09:50,424 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:09:50,424 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 96 [2023-08-29 20:09:50,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:09:50,461 INFO L130 PetriNetUnfolder]: 279/467 cut-off events. [2023-08-29 20:09:50,461 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2023-08-29 20:09:50,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1174 conditions, 467 events. 279/467 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2067 event pairs, 57 based on Foata normal form. 46/505 useless extension candidates. Maximal degree in co-relation 1162. Up to 392 conditions per place. [2023-08-29 20:09:50,462 INFO L137 encePairwiseOnDemand]: 90/96 looper letters, 0 selfloop transitions, 0 changer transitions 29/29 dead transitions. [2023-08-29 20:09:50,462 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 29 transitions, 155 flow [2023-08-29 20:09:50,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:09:50,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:09:50,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 146 transitions. [2023-08-29 20:09:50,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069444444444444 [2023-08-29 20:09:50,463 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 146 transitions. [2023-08-29 20:09:50,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 146 transitions. [2023-08-29 20:09:50,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:09:50,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 146 transitions. [2023-08-29 20:09:50,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states 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 20:09:50,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states 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 20:09:50,465 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states 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 20:09:50,465 INFO L175 Difference]: Start difference. First operand has 32 places, 23 transitions, 87 flow. Second operand 3 states and 146 transitions. [2023-08-29 20:09:50,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 29 transitions, 155 flow [2023-08-29 20:09:50,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 29 transitions, 151 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 20:09:50,466 INFO L231 Difference]: Finished difference. Result has 30 places, 0 transitions, 0 flow [2023-08-29 20:09:50,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=30, PETRI_TRANSITIONS=0} [2023-08-29 20:09:50,466 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -1 predicate places. [2023-08-29 20:09:50,466 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 0 transitions, 0 flow [2023-08-29 20:09:50,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 20:09:50,467 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 7 remaining) [2023-08-29 20:09:50,467 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (5 of 7 remaining) [2023-08-29 20:09:50,467 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 7 remaining) [2023-08-29 20:09:50,467 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 7 remaining) [2023-08-29 20:09:50,467 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 7 remaining) [2023-08-29 20:09:50,467 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-29 20:09:50,467 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 7 remaining) [2023-08-29 20:09:50,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-29 20:09:50,468 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-29 20:09:50,468 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 20:09:50,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 55 transitions, 131 flow [2023-08-29 20:09:50,477 INFO L130 PetriNetUnfolder]: 4/104 cut-off events. [2023-08-29 20:09:50,477 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 20:09:50,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 104 events. 4/104 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 208 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 83. Up to 8 conditions per place. [2023-08-29 20:09:50,477 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 55 transitions, 131 flow [2023-08-29 20:09:50,477 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 44 transitions, 109 flow [2023-08-29 20:09:50,477 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 20:09:50,478 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 51 places, 44 transitions, 109 flow [2023-08-29 20:09:50,478 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 51 places, 44 transitions, 109 flow [2023-08-29 20:09:50,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 44 transitions, 109 flow [2023-08-29 20:09:50,481 INFO L130 PetriNetUnfolder]: 0/60 cut-off events. [2023-08-29 20:09:50,481 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 20:09:50,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 60 events. 0/60 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2023-08-29 20:09:50,481 INFO L119 LiptonReduction]: Number of co-enabled transitions 630 [2023-08-29 20:09:51,428 INFO L134 LiptonReduction]: Checked pairs total: 1724 [2023-08-29 20:09:51,428 INFO L136 LiptonReduction]: Total number of compositions: 31 [2023-08-29 20:09:51,429 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 20:09:51,429 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;@77458983, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 20:09:51,429 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 20:09:51,430 INFO L130 PetriNetUnfolder]: 0/21 cut-off events. [2023-08-29 20:09:51,431 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 20:09:51,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:09:51,431 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2023-08-29 20:09:51,431 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 20:09:51,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:09:51,431 INFO L85 PathProgramCache]: Analyzing trace with hash -2057648729, now seen corresponding path program 1 times [2023-08-29 20:09:51,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:09:51,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177049954] [2023-08-29 20:09:51,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:09:51,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:09:51,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 20:09:51,438 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 20:09:51,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 20:09:51,444 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 20:09:51,444 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 20:09:51,444 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 20:09:51,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-29 20:09:51,444 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 20:09:51,445 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 20:09:51,445 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 20:09:51,445 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-29 20:09:51,453 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 20:09:51,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 63 transitions, 158 flow [2023-08-29 20:09:51,458 INFO L130 PetriNetUnfolder]: 5/129 cut-off events. [2023-08-29 20:09:51,459 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-29 20:09:51,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 129 events. 5/129 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 254 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 112. Up to 10 conditions per place. [2023-08-29 20:09:51,459 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 63 transitions, 158 flow [2023-08-29 20:09:51,459 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 63 transitions, 158 flow [2023-08-29 20:09:51,460 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 20:09:51,460 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 71 places, 63 transitions, 158 flow [2023-08-29 20:09:51,460 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 71 places, 63 transitions, 158 flow [2023-08-29 20:09:51,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 63 transitions, 158 flow [2023-08-29 20:09:51,465 INFO L130 PetriNetUnfolder]: 5/129 cut-off events. [2023-08-29 20:09:51,465 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-29 20:09:51,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 129 events. 5/129 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 254 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 112. Up to 10 conditions per place. [2023-08-29 20:09:51,466 INFO L119 LiptonReduction]: Number of co-enabled transitions 1680 [2023-08-29 20:09:52,271 INFO L134 LiptonReduction]: Checked pairs total: 4072 [2023-08-29 20:09:52,271 INFO L136 LiptonReduction]: Total number of compositions: 45 [2023-08-29 20:09:52,272 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 20:09:52,272 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;@77458983, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 20:09:52,272 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-29 20:09:52,273 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 20:09:52,273 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:09:52,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:09:52,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 20:09:52,273 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2023-08-29 20:09:52,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:09:52,273 INFO L85 PathProgramCache]: Analyzing trace with hash 18201, now seen corresponding path program 1 times [2023-08-29 20:09:52,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:09:52,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010977243] [2023-08-29 20:09:52,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:09:52,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:09:52,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:09:52,297 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 20:09:52,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:09:52,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010977243] [2023-08-29 20:09:52,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010977243] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:09:52,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:09:52,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:09:52,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226976334] [2023-08-29 20:09:52,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:09:52,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:09:52,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:09:52,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:09:52,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:09:52,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 108 [2023-08-29 20:09:52,312 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states 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 20:09:52,312 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:09:52,312 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 108 [2023-08-29 20:09:52,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:09:52,559 INFO L130 PetriNetUnfolder]: 2562/4074 cut-off events. [2023-08-29 20:09:52,559 INFO L131 PetriNetUnfolder]: For 1054/1054 co-relation queries the response was YES. [2023-08-29 20:09:52,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8319 conditions, 4074 events. 2562/4074 cut-off events. For 1054/1054 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 26284 event pairs, 2562 based on Foata normal form. 0/2624 useless extension candidates. Maximal degree in co-relation 1694. Up to 3585 conditions per place. [2023-08-29 20:09:52,575 INFO L137 encePairwiseOnDemand]: 104/108 looper letters, 18 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-08-29 20:09:52,575 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 26 transitions, 122 flow [2023-08-29 20:09:52,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:09:52,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:09:52,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 151 transitions. [2023-08-29 20:09:52,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4660493827160494 [2023-08-29 20:09:52,576 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 151 transitions. [2023-08-29 20:09:52,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 151 transitions. [2023-08-29 20:09:52,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:09:52,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 151 transitions. [2023-08-29 20:09:52,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states 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 20:09:52,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states 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 20:09:52,578 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states 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 20:09:52,578 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 90 flow. Second operand 3 states and 151 transitions. [2023-08-29 20:09:52,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 26 transitions, 122 flow [2023-08-29 20:09:52,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 26 transitions, 110 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-29 20:09:52,580 INFO L231 Difference]: Finished difference. Result has 37 places, 26 transitions, 74 flow [2023-08-29 20:09:52,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=37, PETRI_TRANSITIONS=26} [2023-08-29 20:09:52,580 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -1 predicate places. [2023-08-29 20:09:52,580 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 74 flow [2023-08-29 20:09:52,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states 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 20:09:52,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:09:52,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 20:09:52,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-29 20:09:52,581 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2023-08-29 20:09:52,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:09:52,581 INFO L85 PathProgramCache]: Analyzing trace with hash 18200, now seen corresponding path program 1 times [2023-08-29 20:09:52,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:09:52,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112501766] [2023-08-29 20:09:52,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:09:52,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:09:52,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:09:52,599 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 20:09:52,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:09:52,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112501766] [2023-08-29 20:09:52,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112501766] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:09:52,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:09:52,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:09:52,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421093116] [2023-08-29 20:09:52,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:09:52,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:09:52,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:09:52,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:09:52,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:09:52,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 108 [2023-08-29 20:09:52,613 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states 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 20:09:52,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:09:52,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 108 [2023-08-29 20:09:52,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:09:52,794 INFO L130 PetriNetUnfolder]: 1623/2709 cut-off events. [2023-08-29 20:09:52,795 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-29 20:09:52,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5340 conditions, 2709 events. 1623/2709 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 16984 event pairs, 1623 based on Foata normal form. 0/1913 useless extension candidates. Maximal degree in co-relation 5330. Up to 2305 conditions per place. [2023-08-29 20:09:52,804 INFO L137 encePairwiseOnDemand]: 106/108 looper letters, 17 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-08-29 20:09:52,804 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 25 transitions, 108 flow [2023-08-29 20:09:52,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:09:52,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:09:52,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 154 transitions. [2023-08-29 20:09:52,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47530864197530864 [2023-08-29 20:09:52,805 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 154 transitions. [2023-08-29 20:09:52,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 154 transitions. [2023-08-29 20:09:52,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:09:52,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 154 transitions. [2023-08-29 20:09:52,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 20:09:52,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states 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 20:09:52,807 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states 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 20:09:52,807 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 74 flow. Second operand 3 states and 154 transitions. [2023-08-29 20:09:52,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 25 transitions, 108 flow [2023-08-29 20:09:52,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 25 transitions, 107 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 20:09:52,808 INFO L231 Difference]: Finished difference. Result has 37 places, 25 transitions, 73 flow [2023-08-29 20:09:52,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=37, PETRI_TRANSITIONS=25} [2023-08-29 20:09:52,808 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -1 predicate places. [2023-08-29 20:09:52,808 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 25 transitions, 73 flow [2023-08-29 20:09:52,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states 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 20:09:52,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:09:52,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 20:09:52,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-29 20:09:52,809 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2023-08-29 20:09:52,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:09:52,809 INFO L85 PathProgramCache]: Analyzing trace with hash 17507859, now seen corresponding path program 1 times [2023-08-29 20:09:52,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:09:52,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211711506] [2023-08-29 20:09:52,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:09:52,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:09:52,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:09:52,825 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 20:09:52,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:09:52,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211711506] [2023-08-29 20:09:52,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211711506] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:09:52,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:09:52,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:09:52,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885185668] [2023-08-29 20:09:52,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:09:52,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:09:52,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:09:52,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:09:52,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:09:52,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 108 [2023-08-29 20:09:52,830 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 25 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 20:09:52,830 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:09:52,830 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 108 [2023-08-29 20:09:52,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:09:52,948 INFO L130 PetriNetUnfolder]: 1032/1602 cut-off events. [2023-08-29 20:09:52,948 INFO L131 PetriNetUnfolder]: For 163/163 co-relation queries the response was YES. [2023-08-29 20:09:52,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3332 conditions, 1602 events. 1032/1602 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 8317 event pairs, 269 based on Foata normal form. 0/1245 useless extension candidates. Maximal degree in co-relation 3321. Up to 1390 conditions per place. [2023-08-29 20:09:52,954 INFO L137 encePairwiseOnDemand]: 99/108 looper letters, 25 selfloop transitions, 5 changer transitions 0/37 dead transitions. [2023-08-29 20:09:52,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 37 transitions, 172 flow [2023-08-29 20:09:52,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:09:52,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:09:52,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 166 transitions. [2023-08-29 20:09:52,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5123456790123457 [2023-08-29 20:09:52,955 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 166 transitions. [2023-08-29 20:09:52,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 166 transitions. [2023-08-29 20:09:52,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:09:52,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 166 transitions. [2023-08-29 20:09:52,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states 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 20:09:52,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states 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 20:09:52,957 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states 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 20:09:52,957 INFO L175 Difference]: Start difference. First operand has 37 places, 25 transitions, 73 flow. Second operand 3 states and 166 transitions. [2023-08-29 20:09:52,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 37 transitions, 172 flow [2023-08-29 20:09:52,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 37 transitions, 171 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 20:09:52,958 INFO L231 Difference]: Finished difference. Result has 39 places, 29 transitions, 111 flow [2023-08-29 20:09:52,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=39, PETRI_TRANSITIONS=29} [2023-08-29 20:09:52,958 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2023-08-29 20:09:52,959 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 29 transitions, 111 flow [2023-08-29 20:09:52,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 20:09:52,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:09:52,959 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 20:09:52,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-29 20:09:52,959 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2023-08-29 20:09:52,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:09:52,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1941186926, now seen corresponding path program 1 times [2023-08-29 20:09:52,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:09:52,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949813032] [2023-08-29 20:09:52,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:09:52,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:09:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:09:52,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 20:09:52,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:09:52,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949813032] [2023-08-29 20:09:52,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949813032] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:09:52,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:09:52,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 20:09:52,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695242629] [2023-08-29 20:09:52,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:09:52,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:09:52,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:09:52,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:09:52,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:09:52,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 108 [2023-08-29 20:09:52,984 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 29 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 20:09:52,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:09:52,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 108 [2023-08-29 20:09:52,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:09:53,125 INFO L130 PetriNetUnfolder]: 1623/2343 cut-off events. [2023-08-29 20:09:53,126 INFO L131 PetriNetUnfolder]: For 474/474 co-relation queries the response was YES. [2023-08-29 20:09:53,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5831 conditions, 2343 events. 1623/2343 cut-off events. For 474/474 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 11400 event pairs, 347 based on Foata normal form. 342/2664 useless extension candidates. Maximal degree in co-relation 5818. Up to 2160 conditions per place. [2023-08-29 20:09:53,130 INFO L137 encePairwiseOnDemand]: 100/108 looper letters, 0 selfloop transitions, 0 changer transitions 37/37 dead transitions. [2023-08-29 20:09:53,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 37 transitions, 202 flow [2023-08-29 20:09:53,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:09:53,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:09:53,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 166 transitions. [2023-08-29 20:09:53,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5123456790123457 [2023-08-29 20:09:53,131 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 166 transitions. [2023-08-29 20:09:53,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 166 transitions. [2023-08-29 20:09:53,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:09:53,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 166 transitions. [2023-08-29 20:09:53,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states 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 20:09:53,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states 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 20:09:53,133 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states 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 20:09:53,133 INFO L175 Difference]: Start difference. First operand has 39 places, 29 transitions, 111 flow. Second operand 3 states and 166 transitions. [2023-08-29 20:09:53,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 37 transitions, 202 flow [2023-08-29 20:09:53,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 37 transitions, 197 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 20:09:53,134 INFO L231 Difference]: Finished difference. Result has 36 places, 0 transitions, 0 flow [2023-08-29 20:09:53,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=36, PETRI_TRANSITIONS=0} [2023-08-29 20:09:53,134 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -2 predicate places. [2023-08-29 20:09:53,135 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 0 transitions, 0 flow [2023-08-29 20:09:53,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 20:09:53,135 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 8 remaining) [2023-08-29 20:09:53,135 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (6 of 8 remaining) [2023-08-29 20:09:53,135 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 8 remaining) [2023-08-29 20:09:53,135 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 8 remaining) [2023-08-29 20:09:53,135 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 8 remaining) [2023-08-29 20:09:53,136 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2023-08-29 20:09:53,136 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 8 remaining) [2023-08-29 20:09:53,136 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 8 remaining) [2023-08-29 20:09:53,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-29 20:09:53,136 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-29 20:09:53,136 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 20:09:53,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 63 transitions, 158 flow [2023-08-29 20:09:53,142 INFO L130 PetriNetUnfolder]: 5/129 cut-off events. [2023-08-29 20:09:53,142 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-29 20:09:53,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 129 events. 5/129 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 254 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 112. Up to 10 conditions per place. [2023-08-29 20:09:53,143 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 63 transitions, 158 flow [2023-08-29 20:09:53,143 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 61 places, 52 transitions, 136 flow [2023-08-29 20:09:53,143 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 20:09:53,143 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 61 places, 52 transitions, 136 flow [2023-08-29 20:09:53,143 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 61 places, 52 transitions, 136 flow [2023-08-29 20:09:53,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 52 transitions, 136 flow [2023-08-29 20:09:53,147 INFO L130 PetriNetUnfolder]: 0/74 cut-off events. [2023-08-29 20:09:53,147 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-29 20:09:53,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 74 events. 0/74 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 58 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2023-08-29 20:09:53,147 INFO L119 LiptonReduction]: Number of co-enabled transitions 1064 [2023-08-29 20:09:54,127 INFO L134 LiptonReduction]: Checked pairs total: 3077 [2023-08-29 20:09:54,127 INFO L136 LiptonReduction]: Total number of compositions: 35 [2023-08-29 20:09:54,128 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 20:09:54,128 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;@77458983, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 20:09:54,128 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 20:09:54,131 INFO L130 PetriNetUnfolder]: 0/28 cut-off events. [2023-08-29 20:09:54,131 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-29 20:09:54,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:09:54,131 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2023-08-29 20:09:54,131 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 20:09:54,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:09:54,131 INFO L85 PathProgramCache]: Analyzing trace with hash 975122219, now seen corresponding path program 1 times [2023-08-29 20:09:54,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:09:54,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581392126] [2023-08-29 20:09:54,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:09:54,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:09:54,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 20:09:54,139 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 20:09:54,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 20:09:54,145 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 20:09:54,145 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 20:09:54,145 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 20:09:54,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-29 20:09:54,146 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 20:09:54,146 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 20:09:54,146 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 20:09:54,146 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-29 20:09:54,156 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 20:09:54,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 71 transitions, 187 flow [2023-08-29 20:09:54,164 INFO L130 PetriNetUnfolder]: 6/154 cut-off events. [2023-08-29 20:09:54,164 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-29 20:09:54,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 154 events. 6/154 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 316 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 142. Up to 12 conditions per place. [2023-08-29 20:09:54,164 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 71 transitions, 187 flow [2023-08-29 20:09:54,165 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 71 transitions, 187 flow [2023-08-29 20:09:54,165 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 20:09:54,165 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 81 places, 71 transitions, 187 flow [2023-08-29 20:09:54,165 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 81 places, 71 transitions, 187 flow [2023-08-29 20:09:54,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 71 transitions, 187 flow [2023-08-29 20:09:54,172 INFO L130 PetriNetUnfolder]: 6/154 cut-off events. [2023-08-29 20:09:54,172 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-29 20:09:54,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 154 events. 6/154 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 316 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 142. Up to 12 conditions per place. [2023-08-29 20:09:54,174 INFO L119 LiptonReduction]: Number of co-enabled transitions 2380 [2023-08-29 20:09:55,069 INFO L134 LiptonReduction]: Checked pairs total: 5447 [2023-08-29 20:09:55,069 INFO L136 LiptonReduction]: Total number of compositions: 49 [2023-08-29 20:09:55,070 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 20:09:55,071 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;@77458983, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 20:09:55,071 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-29 20:09:55,071 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-29 20:09:55,071 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:09:55,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:09:55,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 20:09:55,071 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 6 more)] === [2023-08-29 20:09:55,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:09:55,072 INFO L85 PathProgramCache]: Analyzing trace with hash 23389, now seen corresponding path program 1 times [2023-08-29 20:09:55,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:09:55,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630516693] [2023-08-29 20:09:55,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:09:55,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:09:55,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:09:55,082 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 20:09:55,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:09:55,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630516693] [2023-08-29 20:09:55,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630516693] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:09:55,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:09:55,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:09:55,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977587851] [2023-08-29 20:09:55,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:09:55,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 20:09:55,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:09:55,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 20:09:55,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 20:09:55,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 120 [2023-08-29 20:09:55,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 34 transitions, 113 flow. Second operand has 2 states, 2 states have (on average 55.0) internal successors, (110), 2 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 20:09:55,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:09:55,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 120 [2023-08-29 20:09:55,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:09:56,532 INFO L130 PetriNetUnfolder]: 18093/25855 cut-off events. [2023-08-29 20:09:56,532 INFO L131 PetriNetUnfolder]: For 6750/6750 co-relation queries the response was YES. [2023-08-29 20:09:56,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52629 conditions, 25855 events. 18093/25855 cut-off events. For 6750/6750 co-relation queries the response was YES. Maximal size of possible extension queue 1641. Compared 179403 event pairs, 18093 based on Foata normal form. 0/16071 useless extension candidates. Maximal degree in co-relation 11107. Up to 23554 conditions per place. [2023-08-29 20:09:56,654 INFO L137 encePairwiseOnDemand]: 118/120 looper letters, 24 selfloop transitions, 0 changer transitions 0/32 dead transitions. [2023-08-29 20:09:56,655 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 32 transitions, 157 flow [2023-08-29 20:09:56,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 20:09:56,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 20:09:56,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 134 transitions. [2023-08-29 20:09:56,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2023-08-29 20:09:56,656 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 134 transitions. [2023-08-29 20:09:56,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 134 transitions. [2023-08-29 20:09:56,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:09:56,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 134 transitions. [2023-08-29 20:09:56,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 67.0) internal successors, (134), 2 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 20:09:56,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states 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 20:09:56,657 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states 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 20:09:56,658 INFO L175 Difference]: Start difference. First operand has 45 places, 34 transitions, 113 flow. Second operand 2 states and 134 transitions. [2023-08-29 20:09:56,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 32 transitions, 157 flow [2023-08-29 20:09:56,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 32 transitions, 137 flow, removed 10 selfloop flow, removed 0 redundant places. [2023-08-29 20:09:56,664 INFO L231 Difference]: Finished difference. Result has 44 places, 32 transitions, 89 flow [2023-08-29 20:09:56,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=89, PETRI_PLACES=44, PETRI_TRANSITIONS=32} [2023-08-29 20:09:56,665 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -1 predicate places. [2023-08-29 20:09:56,665 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 32 transitions, 89 flow [2023-08-29 20:09:56,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 55.0) internal successors, (110), 2 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 20:09:56,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:09:56,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 20:09:56,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-29 20:09:56,666 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 6 more)] === [2023-08-29 20:09:56,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:09:56,666 INFO L85 PathProgramCache]: Analyzing trace with hash 23387, now seen corresponding path program 1 times [2023-08-29 20:09:56,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:09:56,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482607751] [2023-08-29 20:09:56,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:09:56,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:09:56,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:09:56,677 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 20:09:56,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:09:56,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482607751] [2023-08-29 20:09:56,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482607751] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:09:56,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:09:56,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:09:56,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855027274] [2023-08-29 20:09:56,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:09:56,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:09:56,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:09:56,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:09:56,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:09:56,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 120 [2023-08-29 20:09:56,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 32 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states 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 20:09:56,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:09:56,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 120 [2023-08-29 20:09:56,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:09:57,735 INFO L130 PetriNetUnfolder]: 13314/19370 cut-off events. [2023-08-29 20:09:57,736 INFO L131 PetriNetUnfolder]: For 850/850 co-relation queries the response was YES. [2023-08-29 20:09:57,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38065 conditions, 19370 events. 13314/19370 cut-off events. For 850/850 co-relation queries the response was YES. Maximal size of possible extension queue 1246. Compared 132686 event pairs, 13314 based on Foata normal form. 0/12544 useless extension candidates. Maximal degree in co-relation 38057. Up to 17409 conditions per place. [2023-08-29 20:09:57,831 INFO L137 encePairwiseOnDemand]: 118/120 looper letters, 22 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-29 20:09:57,832 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 31 transitions, 133 flow [2023-08-29 20:09:57,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:09:57,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:09:57,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2023-08-29 20:09:57,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-08-29 20:09:57,833 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 168 transitions. [2023-08-29 20:09:57,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 168 transitions. [2023-08-29 20:09:57,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:09:57,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 168 transitions. [2023-08-29 20:09:57,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states 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 20:09:57,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states 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 20:09:57,834 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states 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 20:09:57,834 INFO L175 Difference]: Start difference. First operand has 44 places, 32 transitions, 89 flow. Second operand 3 states and 168 transitions. [2023-08-29 20:09:57,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 31 transitions, 133 flow [2023-08-29 20:09:57,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 31 transitions, 133 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 20:09:57,836 INFO L231 Difference]: Finished difference. Result has 45 places, 31 transitions, 89 flow [2023-08-29 20:09:57,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=45, PETRI_TRANSITIONS=31} [2023-08-29 20:09:57,836 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2023-08-29 20:09:57,836 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 31 transitions, 89 flow [2023-08-29 20:09:57,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states 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 20:09:57,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:09:57,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 20:09:57,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-29 20:09:57,837 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 6 more)] === [2023-08-29 20:09:57,837 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:09:57,837 INFO L85 PathProgramCache]: Analyzing trace with hash 23385, now seen corresponding path program 1 times [2023-08-29 20:09:57,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:09:57,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162656855] [2023-08-29 20:09:57,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:09:57,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:09:57,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:09:57,860 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 20:09:57,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:09:57,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162656855] [2023-08-29 20:09:57,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162656855] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:09:57,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:09:57,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:09:57,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739194097] [2023-08-29 20:09:57,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:09:57,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:09:57,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:09:57,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:09:57,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:09:57,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 120 [2023-08-29 20:09:57,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 31 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 20:09:57,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:09:57,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 120 [2023-08-29 20:09:57,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:09:58,606 INFO L130 PetriNetUnfolder]: 8535/12885 cut-off events. [2023-08-29 20:09:58,606 INFO L131 PetriNetUnfolder]: For 850/850 co-relation queries the response was YES. [2023-08-29 20:09:58,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25438 conditions, 12885 events. 8535/12885 cut-off events. For 850/850 co-relation queries the response was YES. Maximal size of possible extension queue 850. Compared 87700 event pairs, 8535 based on Foata normal form. 0/9017 useless extension candidates. Maximal degree in co-relation 25429. Up to 11265 conditions per place. [2023-08-29 20:09:58,650 INFO L137 encePairwiseOnDemand]: 118/120 looper letters, 21 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-29 20:09:58,651 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 30 transitions, 131 flow [2023-08-29 20:09:58,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:09:58,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:09:58,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 173 transitions. [2023-08-29 20:09:58,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48055555555555557 [2023-08-29 20:09:58,652 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 173 transitions. [2023-08-29 20:09:58,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 173 transitions. [2023-08-29 20:09:58,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:09:58,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 173 transitions. [2023-08-29 20:09:58,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states 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 20:09:58,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states 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 20:09:58,653 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states 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 20:09:58,653 INFO L175 Difference]: Start difference. First operand has 45 places, 31 transitions, 89 flow. Second operand 3 states and 173 transitions. [2023-08-29 20:09:58,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 30 transitions, 131 flow [2023-08-29 20:09:58,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 30 transitions, 130 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 20:09:58,655 INFO L231 Difference]: Finished difference. Result has 45 places, 30 transitions, 88 flow [2023-08-29 20:09:58,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=45, PETRI_TRANSITIONS=30} [2023-08-29 20:09:58,656 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2023-08-29 20:09:58,656 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 30 transitions, 88 flow [2023-08-29 20:09:58,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 20:09:58,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:09:58,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 20:09:58,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-29 20:09:58,657 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 6 more)] === [2023-08-29 20:09:58,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:09:58,657 INFO L85 PathProgramCache]: Analyzing trace with hash 22494732, now seen corresponding path program 1 times [2023-08-29 20:09:58,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:09:58,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13195206] [2023-08-29 20:09:58,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:09:58,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:09:58,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:09:58,686 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 20:09:58,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:09:58,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13195206] [2023-08-29 20:09:58,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13195206] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:09:58,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:09:58,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:09:58,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348753531] [2023-08-29 20:09:58,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:09:58,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:09:58,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:09:58,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:09:58,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:09:58,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 120 [2023-08-29 20:09:58,692 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 30 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states 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 20:09:58,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:09:58,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 120 [2023-08-29 20:09:58,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:09:59,047 INFO L130 PetriNetUnfolder]: 5980/8248 cut-off events. [2023-08-29 20:09:59,048 INFO L131 PetriNetUnfolder]: For 720/720 co-relation queries the response was YES. [2023-08-29 20:09:59,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17135 conditions, 8248 events. 5980/8248 cut-off events. For 720/720 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 45304 event pairs, 1759 based on Foata normal form. 0/6125 useless extension candidates. Maximal degree in co-relation 17126. Up to 7756 conditions per place. [2023-08-29 20:09:59,085 INFO L137 encePairwiseOnDemand]: 109/120 looper letters, 31 selfloop transitions, 6 changer transitions 0/45 dead transitions. [2023-08-29 20:09:59,085 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 212 flow [2023-08-29 20:09:59,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:09:59,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:09:59,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 186 transitions. [2023-08-29 20:09:59,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2023-08-29 20:09:59,086 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 186 transitions. [2023-08-29 20:09:59,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 186 transitions. [2023-08-29 20:09:59,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:09:59,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 186 transitions. [2023-08-29 20:09:59,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states 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 20:09:59,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states 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 20:09:59,088 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states 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 20:09:59,088 INFO L175 Difference]: Start difference. First operand has 45 places, 30 transitions, 88 flow. Second operand 3 states and 186 transitions. [2023-08-29 20:09:59,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 212 flow [2023-08-29 20:09:59,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 211 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 20:09:59,090 INFO L231 Difference]: Finished difference. Result has 47 places, 35 transitions, 135 flow [2023-08-29 20:09:59,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=47, PETRI_TRANSITIONS=35} [2023-08-29 20:09:59,090 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2023-08-29 20:09:59,090 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 35 transitions, 135 flow [2023-08-29 20:09:59,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states 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 20:09:59,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:09:59,091 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 20:09:59,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-29 20:09:59,091 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 6 more)] === [2023-08-29 20:09:59,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:09:59,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1539366827, now seen corresponding path program 1 times [2023-08-29 20:09:59,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:09:59,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773353920] [2023-08-29 20:09:59,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:09:59,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:09:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:09:59,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 20:09:59,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:09:59,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773353920] [2023-08-29 20:09:59,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773353920] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:09:59,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:09:59,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 20:09:59,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300084467] [2023-08-29 20:09:59,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:09:59,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:09:59,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:09:59,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:09:59,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:09:59,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 120 [2023-08-29 20:09:59,118 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 35 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 20:09:59,118 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:09:59,118 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 120 [2023-08-29 20:09:59,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:09:59,632 INFO L130 PetriNetUnfolder]: 8535/11343 cut-off events. [2023-08-29 20:09:59,632 INFO L131 PetriNetUnfolder]: For 2560/2560 co-relation queries the response was YES. [2023-08-29 20:09:59,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27939 conditions, 11343 events. 8535/11343 cut-off events. For 2560/2560 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 58092 event pairs, 2043 based on Foata normal form. 2092/13381 useless extension candidates. Maximal degree in co-relation 27929. Up to 10912 conditions per place. [2023-08-29 20:09:59,661 INFO L137 encePairwiseOnDemand]: 110/120 looper letters, 0 selfloop transitions, 0 changer transitions 45/45 dead transitions. [2023-08-29 20:09:59,661 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 45 transitions, 249 flow [2023-08-29 20:09:59,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:09:59,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:09:59,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 186 transitions. [2023-08-29 20:09:59,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2023-08-29 20:09:59,662 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 186 transitions. [2023-08-29 20:09:59,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 186 transitions. [2023-08-29 20:09:59,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:09:59,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 186 transitions. [2023-08-29 20:09:59,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states 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 20:09:59,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states 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 20:09:59,664 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states 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 20:09:59,664 INFO L175 Difference]: Start difference. First operand has 47 places, 35 transitions, 135 flow. Second operand 3 states and 186 transitions. [2023-08-29 20:09:59,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 45 transitions, 249 flow [2023-08-29 20:09:59,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 45 transitions, 243 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 20:09:59,666 INFO L231 Difference]: Finished difference. Result has 43 places, 0 transitions, 0 flow [2023-08-29 20:09:59,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=43, PETRI_TRANSITIONS=0} [2023-08-29 20:09:59,667 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -2 predicate places. [2023-08-29 20:09:59,667 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 0 transitions, 0 flow [2023-08-29 20:09:59,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 20:09:59,667 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (8 of 9 remaining) [2023-08-29 20:09:59,667 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2023-08-29 20:09:59,668 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 9 remaining) [2023-08-29 20:09:59,668 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (5 of 9 remaining) [2023-08-29 20:09:59,668 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 9 remaining) [2023-08-29 20:09:59,668 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 9 remaining) [2023-08-29 20:09:59,668 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 9 remaining) [2023-08-29 20:09:59,668 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 9 remaining) [2023-08-29 20:09:59,668 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2023-08-29 20:09:59,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-29 20:09:59,669 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-29 20:09:59,669 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 20:09:59,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 71 transitions, 187 flow [2023-08-29 20:09:59,676 INFO L130 PetriNetUnfolder]: 6/154 cut-off events. [2023-08-29 20:09:59,676 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-29 20:09:59,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 154 events. 6/154 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 316 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 142. Up to 12 conditions per place. [2023-08-29 20:09:59,676 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 71 transitions, 187 flow [2023-08-29 20:09:59,677 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 60 transitions, 165 flow [2023-08-29 20:09:59,677 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 20:09:59,677 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 71 places, 60 transitions, 165 flow [2023-08-29 20:09:59,677 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 71 places, 60 transitions, 165 flow [2023-08-29 20:09:59,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 60 transitions, 165 flow [2023-08-29 20:09:59,681 INFO L130 PetriNetUnfolder]: 0/88 cut-off events. [2023-08-29 20:09:59,681 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-29 20:09:59,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 88 events. 0/88 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 72 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2023-08-29 20:09:59,682 INFO L119 LiptonReduction]: Number of co-enabled transitions 1610 [2023-08-29 20:10:00,606 INFO L134 LiptonReduction]: Checked pairs total: 4376 [2023-08-29 20:10:00,606 INFO L136 LiptonReduction]: Total number of compositions: 39 [2023-08-29 20:10:00,608 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 20:10:00,611 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;@77458983, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 20:10:00,611 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 20:10:00,614 INFO L130 PetriNetUnfolder]: 0/35 cut-off events. [2023-08-29 20:10:00,614 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-29 20:10:00,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:10:00,615 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 20:10:00,615 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 20:10:00,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:10:00,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1288356189, now seen corresponding path program 1 times [2023-08-29 20:10:00,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:10:00,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661942906] [2023-08-29 20:10:00,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:10:00,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:10:00,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 20:10:00,636 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 20:10:00,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 20:10:00,647 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 20:10:00,647 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 20:10:00,647 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 20:10:00,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-29 20:10:00,648 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 20:10:00,648 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 20:10:00,648 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 20:10:00,648 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-29 20:10:00,673 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 20:10:00,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 79 transitions, 218 flow [2023-08-29 20:10:00,680 INFO L130 PetriNetUnfolder]: 7/179 cut-off events. [2023-08-29 20:10:00,681 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-29 20:10:00,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 179 events. 7/179 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 366 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 174. Up to 14 conditions per place. [2023-08-29 20:10:00,681 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 79 transitions, 218 flow [2023-08-29 20:10:00,681 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 79 transitions, 218 flow [2023-08-29 20:10:00,681 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 20:10:00,681 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 91 places, 79 transitions, 218 flow [2023-08-29 20:10:00,682 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 91 places, 79 transitions, 218 flow [2023-08-29 20:10:00,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 79 transitions, 218 flow [2023-08-29 20:10:00,704 INFO L130 PetriNetUnfolder]: 7/179 cut-off events. [2023-08-29 20:10:00,705 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-29 20:10:00,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 179 events. 7/179 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 366 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 174. Up to 14 conditions per place. [2023-08-29 20:10:00,707 INFO L119 LiptonReduction]: Number of co-enabled transitions 3192 [2023-08-29 20:10:01,662 INFO L134 LiptonReduction]: Checked pairs total: 8525 [2023-08-29 20:10:01,662 INFO L136 LiptonReduction]: Total number of compositions: 53 [2023-08-29 20:10:01,663 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 20:10:01,663 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;@77458983, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 20:10:01,663 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-29 20:10:01,664 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 20:10:01,664 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:10:01,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:10:01,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 20:10:01,664 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-08-29 20:10:01,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:10:01,664 INFO L85 PathProgramCache]: Analyzing trace with hash 29138, now seen corresponding path program 1 times [2023-08-29 20:10:01,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:10:01,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301682957] [2023-08-29 20:10:01,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:10:01,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:10:01,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:10:01,691 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 20:10:01,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:10:01,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301682957] [2023-08-29 20:10:01,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301682957] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:10:01,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:10:01,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:10:01,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951990627] [2023-08-29 20:10:01,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:10:01,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:10:01,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:10:01,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:10:01,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:10:01,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 132 [2023-08-29 20:10:01,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 39 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 20:10:01,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:10:01,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 132 [2023-08-29 20:10:01,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:10:07,256 INFO L130 PetriNetUnfolder]: 65538/89770 cut-off events. [2023-08-29 20:10:07,256 INFO L131 PetriNetUnfolder]: For 39518/39518 co-relation queries the response was YES. [2023-08-29 20:10:07,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186945 conditions, 89770 events. 65538/89770 cut-off events. For 39518/39518 co-relation queries the response was YES. Maximal size of possible extension queue 4695. Compared 639281 event pairs, 65538 based on Foata normal form. 0/58368 useless extension candidates. Maximal degree in co-relation 40590. Up to 81921 conditions per place. [2023-08-29 20:10:07,862 INFO L137 encePairwiseOnDemand]: 128/132 looper letters, 26 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2023-08-29 20:10:07,862 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 36 transitions, 186 flow [2023-08-29 20:10:07,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:10:07,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:10:07,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2023-08-29 20:10:07,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2023-08-29 20:10:07,864 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 189 transitions. [2023-08-29 20:10:07,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 189 transitions. [2023-08-29 20:10:07,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:10:07,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 189 transitions. [2023-08-29 20:10:07,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states 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 20:10:07,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 132.0) internal successors, (528), 4 states have internal predecessors, (528), 0 states have call successors, (0), 0 states 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 20:10:07,866 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 132.0) internal successors, (528), 4 states have internal predecessors, (528), 0 states have call successors, (0), 0 states 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 20:10:07,866 INFO L175 Difference]: Start difference. First operand has 52 places, 39 transitions, 138 flow. Second operand 3 states and 189 transitions. [2023-08-29 20:10:07,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 36 transitions, 186 flow [2023-08-29 20:10:07,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 36 transitions, 156 flow, removed 15 selfloop flow, removed 0 redundant places. [2023-08-29 20:10:07,881 INFO L231 Difference]: Finished difference. Result has 51 places, 36 transitions, 104 flow [2023-08-29 20:10:07,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=51, PETRI_TRANSITIONS=36} [2023-08-29 20:10:07,881 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2023-08-29 20:10:07,882 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 36 transitions, 104 flow [2023-08-29 20:10:07,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 20:10:07,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:10:07,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 20:10:07,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-29 20:10:07,882 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-08-29 20:10:07,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:10:07,882 INFO L85 PathProgramCache]: Analyzing trace with hash 29140, now seen corresponding path program 1 times [2023-08-29 20:10:07,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:10:07,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215466493] [2023-08-29 20:10:07,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:10:07,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:10:07,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:10:07,898 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 20:10:07,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:10:07,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215466493] [2023-08-29 20:10:07,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215466493] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:10:07,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:10:07,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:10:07,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035079218] [2023-08-29 20:10:07,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:10:07,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:10:07,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:10:07,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:10:07,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:10:07,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 132 [2023-08-29 20:10:07,909 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 36 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 20:10:07,909 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:10:07,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 132 [2023-08-29 20:10:07,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:10:11,005 INFO L130 PetriNetUnfolder]: 42327/59733 cut-off events. [2023-08-29 20:10:11,006 INFO L131 PetriNetUnfolder]: For 3410/3410 co-relation queries the response was YES. [2023-08-29 20:10:11,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118110 conditions, 59733 events. 42327/59733 cut-off events. For 3410/3410 co-relation queries the response was YES. Maximal size of possible extension queue 3228. Compared 429059 event pairs, 42327 based on Foata normal form. 0/41529 useless extension candidates. Maximal degree in co-relation 118098. Up to 53249 conditions per place. [2023-08-29 20:10:11,322 INFO L137 encePairwiseOnDemand]: 130/132 looper letters, 25 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2023-08-29 20:10:11,322 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 35 transitions, 154 flow [2023-08-29 20:10:11,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:10:11,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:10:11,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 192 transitions. [2023-08-29 20:10:11,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2023-08-29 20:10:11,323 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 192 transitions. [2023-08-29 20:10:11,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 192 transitions. [2023-08-29 20:10:11,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:10:11,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 192 transitions. [2023-08-29 20:10:11,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states 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 20:10:11,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 132.0) internal successors, (528), 4 states have internal predecessors, (528), 0 states have call successors, (0), 0 states 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 20:10:11,325 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 132.0) internal successors, (528), 4 states have internal predecessors, (528), 0 states have call successors, (0), 0 states 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 20:10:11,325 INFO L175 Difference]: Start difference. First operand has 51 places, 36 transitions, 104 flow. Second operand 3 states and 192 transitions. [2023-08-29 20:10:11,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 35 transitions, 154 flow [2023-08-29 20:10:11,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 35 transitions, 153 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 20:10:11,327 INFO L231 Difference]: Finished difference. Result has 51 places, 35 transitions, 103 flow [2023-08-29 20:10:11,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=51, PETRI_TRANSITIONS=35} [2023-08-29 20:10:11,327 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2023-08-29 20:10:11,327 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 35 transitions, 103 flow [2023-08-29 20:10:11,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 20:10:11,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:10:11,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 20:10:11,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-29 20:10:11,328 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-08-29 20:10:11,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:10:11,328 INFO L85 PathProgramCache]: Analyzing trace with hash 28028927, now seen corresponding path program 1 times [2023-08-29 20:10:11,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:10:11,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269446693] [2023-08-29 20:10:11,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:10:11,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:10:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:10:11,355 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 20:10:11,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:10:11,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269446693] [2023-08-29 20:10:11,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269446693] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:10:11,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:10:11,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:10:11,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510407996] [2023-08-29 20:10:11,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:10:11,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:10:11,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:10:11,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:10:11,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:10:11,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 132 [2023-08-29 20:10:11,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 35 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 20:10:11,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:10:11,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 132 [2023-08-29 20:10:11,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:10:13,576 INFO L130 PetriNetUnfolder]: 32246/41520 cut-off events. [2023-08-29 20:10:13,577 INFO L131 PetriNetUnfolder]: For 3127/3127 co-relation queries the response was YES. [2023-08-29 20:10:13,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85990 conditions, 41520 events. 32246/41520 cut-off events. For 3127/3127 co-relation queries the response was YES. Maximal size of possible extension queue 2609. Compared 232312 event pairs, 10687 based on Foata normal form. 0/29993 useless extension candidates. Maximal degree in co-relation 85977. Up to 40404 conditions per place. [2023-08-29 20:10:13,792 INFO L137 encePairwiseOnDemand]: 119/132 looper letters, 37 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2023-08-29 20:10:13,792 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 53 transitions, 252 flow [2023-08-29 20:10:13,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:10:13,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:10:13,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 206 transitions. [2023-08-29 20:10:13,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5202020202020202 [2023-08-29 20:10:13,793 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 206 transitions. [2023-08-29 20:10:13,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 206 transitions. [2023-08-29 20:10:13,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:10:13,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 206 transitions. [2023-08-29 20:10:13,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states 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 20:10:13,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 132.0) internal successors, (528), 4 states have internal predecessors, (528), 0 states have call successors, (0), 0 states 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 20:10:13,795 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 132.0) internal successors, (528), 4 states have internal predecessors, (528), 0 states have call successors, (0), 0 states 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 20:10:13,795 INFO L175 Difference]: Start difference. First operand has 51 places, 35 transitions, 103 flow. Second operand 3 states and 206 transitions. [2023-08-29 20:10:13,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 53 transitions, 252 flow [2023-08-29 20:10:13,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 53 transitions, 251 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 20:10:13,798 INFO L231 Difference]: Finished difference. Result has 53 places, 41 transitions, 159 flow [2023-08-29 20:10:13,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=159, PETRI_PLACES=53, PETRI_TRANSITIONS=41} [2023-08-29 20:10:13,798 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2023-08-29 20:10:13,798 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 41 transitions, 159 flow [2023-08-29 20:10:13,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 20:10:13,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:10:13,799 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 20:10:13,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-29 20:10:13,799 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-08-29 20:10:13,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:10:13,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1604039475, now seen corresponding path program 1 times [2023-08-29 20:10:13,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:10:13,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021663004] [2023-08-29 20:10:13,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:10:13,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:10:13,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:10:13,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 20:10:13,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:10:13,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021663004] [2023-08-29 20:10:13,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021663004] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:10:13,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:10:13,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 20:10:13,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569152374] [2023-08-29 20:10:13,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:10:13,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:10:13,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:10:13,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:10:13,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:10:13,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 132 [2023-08-29 20:10:13,821 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 41 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states 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 20:10:13,821 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:10:13,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 132 [2023-08-29 20:10:13,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:10:16,700 INFO L130 PetriNetUnfolder]: 42327/53407 cut-off events. [2023-08-29 20:10:16,700 INFO L131 PetriNetUnfolder]: For 13148/13148 co-relation queries the response was YES. [2023-08-29 20:10:16,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130279 conditions, 53407 events. 42327/53407 cut-off events. For 13148/13148 co-relation queries the response was YES. Maximal size of possible extension queue 2248. Compared 282075 event pairs, 11441 based on Foata normal form. 11464/64736 useless extension candidates. Maximal degree in co-relation 130264. Up to 52416 conditions per place. [2023-08-29 20:10:16,823 INFO L137 encePairwiseOnDemand]: 120/132 looper letters, 0 selfloop transitions, 0 changer transitions 53/53 dead transitions. [2023-08-29 20:10:16,824 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 53 transitions, 296 flow [2023-08-29 20:10:16,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:10:16,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:10:16,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 206 transitions. [2023-08-29 20:10:16,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5202020202020202 [2023-08-29 20:10:16,825 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 206 transitions. [2023-08-29 20:10:16,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 206 transitions. [2023-08-29 20:10:16,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:10:16,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 206 transitions. [2023-08-29 20:10:16,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states 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 20:10:16,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 132.0) internal successors, (528), 4 states have internal predecessors, (528), 0 states have call successors, (0), 0 states 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 20:10:16,826 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 132.0) internal successors, (528), 4 states have internal predecessors, (528), 0 states have call successors, (0), 0 states 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 20:10:16,826 INFO L175 Difference]: Start difference. First operand has 53 places, 41 transitions, 159 flow. Second operand 3 states and 206 transitions. [2023-08-29 20:10:16,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 53 transitions, 296 flow [2023-08-29 20:10:16,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 53 transitions, 289 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 20:10:16,842 INFO L231 Difference]: Finished difference. Result has 48 places, 0 transitions, 0 flow [2023-08-29 20:10:16,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=48, PETRI_TRANSITIONS=0} [2023-08-29 20:10:16,843 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -4 predicate places. [2023-08-29 20:10:16,843 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 0 transitions, 0 flow [2023-08-29 20:10:16,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states 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 20:10:16,843 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 10 remaining) [2023-08-29 20:10:16,843 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (8 of 10 remaining) [2023-08-29 20:10:16,843 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (7 of 10 remaining) [2023-08-29 20:10:16,843 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 10 remaining) [2023-08-29 20:10:16,844 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 10 remaining) [2023-08-29 20:10:16,844 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 10 remaining) [2023-08-29 20:10:16,844 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2023-08-29 20:10:16,844 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 10 remaining) [2023-08-29 20:10:16,844 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2023-08-29 20:10:16,844 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 10 remaining) [2023-08-29 20:10:16,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-29 20:10:16,844 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-29 20:10:16,845 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 20:10:16,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 79 transitions, 218 flow [2023-08-29 20:10:16,852 INFO L130 PetriNetUnfolder]: 7/179 cut-off events. [2023-08-29 20:10:16,853 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-29 20:10:16,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 179 events. 7/179 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 366 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 174. Up to 14 conditions per place. [2023-08-29 20:10:16,853 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 79 transitions, 218 flow [2023-08-29 20:10:16,853 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 68 transitions, 196 flow [2023-08-29 20:10:16,853 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 20:10:16,854 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 81 places, 68 transitions, 196 flow [2023-08-29 20:10:16,854 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 81 places, 68 transitions, 196 flow [2023-08-29 20:10:16,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 68 transitions, 196 flow [2023-08-29 20:10:16,858 INFO L130 PetriNetUnfolder]: 0/102 cut-off events. [2023-08-29 20:10:16,858 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-29 20:10:16,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 102 events. 0/102 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 85 event pairs, 0 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2023-08-29 20:10:16,859 INFO L119 LiptonReduction]: Number of co-enabled transitions 2268 [2023-08-29 20:10:17,846 INFO L134 LiptonReduction]: Checked pairs total: 6322 [2023-08-29 20:10:17,846 INFO L136 LiptonReduction]: Total number of compositions: 43 [2023-08-29 20:10:17,846 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 20:10:17,847 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;@77458983, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 20:10:17,847 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 20:10:17,849 INFO L130 PetriNetUnfolder]: 0/42 cut-off events. [2023-08-29 20:10:17,849 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-29 20:10:17,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:10:17,849 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 20:10:17,849 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 20:10:17,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:10:17,850 INFO L85 PathProgramCache]: Analyzing trace with hash -85541096, now seen corresponding path program 1 times [2023-08-29 20:10:17,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:10:17,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881966778] [2023-08-29 20:10:17,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:10:17,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:10:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 20:10:17,858 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 20:10:17,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 20:10:17,868 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 20:10:17,868 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 20:10:17,868 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 20:10:17,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-29 20:10:17,868 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 20:10:17,869 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 20:10:17,869 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 20:10:17,869 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-29 20:10:17,879 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 20:10:17,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 87 transitions, 251 flow [2023-08-29 20:10:17,888 INFO L130 PetriNetUnfolder]: 8/204 cut-off events. [2023-08-29 20:10:17,888 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-29 20:10:17,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 204 events. 8/204 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 442 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 208. Up to 16 conditions per place. [2023-08-29 20:10:17,889 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 87 transitions, 251 flow [2023-08-29 20:10:17,889 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 101 places, 87 transitions, 251 flow [2023-08-29 20:10:17,889 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 20:10:17,889 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 101 places, 87 transitions, 251 flow [2023-08-29 20:10:17,889 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 101 places, 87 transitions, 251 flow [2023-08-29 20:10:17,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 87 transitions, 251 flow [2023-08-29 20:10:17,897 INFO L130 PetriNetUnfolder]: 8/204 cut-off events. [2023-08-29 20:10:17,897 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-29 20:10:17,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 204 events. 8/204 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 442 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 208. Up to 16 conditions per place. [2023-08-29 20:10:17,900 INFO L119 LiptonReduction]: Number of co-enabled transitions 4116 [2023-08-29 20:10:18,794 INFO L134 LiptonReduction]: Checked pairs total: 10973 [2023-08-29 20:10:18,794 INFO L136 LiptonReduction]: Total number of compositions: 57 [2023-08-29 20:10:18,795 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 20:10:18,795 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;@77458983, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 20:10:18,795 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-29 20:10:18,795 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 20:10:18,795 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:10:18,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:10:18,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 20:10:18,796 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 8 more)] === [2023-08-29 20:10:18,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:10:18,796 INFO L85 PathProgramCache]: Analyzing trace with hash 35384, now seen corresponding path program 1 times [2023-08-29 20:10:18,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:10:18,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126141111] [2023-08-29 20:10:18,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:10:18,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:10:18,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:10:18,821 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 20:10:18,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:10:18,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126141111] [2023-08-29 20:10:18,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126141111] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:10:18,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:10:18,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:10:18,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481100344] [2023-08-29 20:10:18,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:10:18,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:10:18,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:10:18,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:10:18,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:10:18,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 144 [2023-08-29 20:10:18,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 44 transitions, 165 flow. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states 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 20:10:18,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:10:18,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 144 [2023-08-29 20:10:18,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:10:43,456 INFO L130 PetriNetUnfolder]: 311298/408234 cut-off events. [2023-08-29 20:10:43,457 INFO L131 PetriNetUnfolder]: For 217694/217694 co-relation queries the response was YES. [2023-08-29 20:10:44,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 855618 conditions, 408234 events. 311298/408234 cut-off events. For 217694/217694 co-relation queries the response was YES. Maximal size of possible extension queue 17724. Compared 3003827 event pairs, 311298 based on Foata normal form. 0/266240 useless extension candidates. Maximal degree in co-relation 189326. Up to 376833 conditions per place. [2023-08-29 20:10:46,537 INFO L137 encePairwiseOnDemand]: 140/144 looper letters, 30 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-08-29 20:10:46,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 41 transitions, 221 flow [2023-08-29 20:10:46,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:10:46,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:10:46,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 214 transitions. [2023-08-29 20:10:46,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49537037037037035 [2023-08-29 20:10:46,539 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 214 transitions. [2023-08-29 20:10:46,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 214 transitions. [2023-08-29 20:10:46,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:10:46,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 214 transitions. [2023-08-29 20:10:46,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states 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 20:10:46,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states 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 20:10:46,549 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states 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 20:10:46,549 INFO L175 Difference]: Start difference. First operand has 59 places, 44 transitions, 165 flow. Second operand 3 states and 214 transitions. [2023-08-29 20:10:46,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 41 transitions, 221 flow [2023-08-29 20:10:46,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 41 transitions, 179 flow, removed 21 selfloop flow, removed 0 redundant places. [2023-08-29 20:10:46,858 INFO L231 Difference]: Finished difference. Result has 58 places, 41 transitions, 119 flow [2023-08-29 20:10:46,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=58, PETRI_TRANSITIONS=41} [2023-08-29 20:10:46,859 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -1 predicate places. [2023-08-29 20:10:46,859 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 41 transitions, 119 flow [2023-08-29 20:10:46,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states 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 20:10:46,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:10:46,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 20:10:46,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-29 20:10:46,860 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 8 more)] === [2023-08-29 20:10:46,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:10:46,860 INFO L85 PathProgramCache]: Analyzing trace with hash 35385, now seen corresponding path program 1 times [2023-08-29 20:10:46,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:10:46,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861832501] [2023-08-29 20:10:46,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:10:46,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:10:46,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:10:46,870 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 20:10:46,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:10:46,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861832501] [2023-08-29 20:10:46,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861832501] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:10:46,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:10:46,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:10:46,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322395987] [2023-08-29 20:10:46,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:10:46,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:10:46,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:10:46,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:10:46,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:10:46,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 144 [2023-08-29 20:10:46,883 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 41 transitions, 119 flow. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states 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 20:10:46,883 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:10:46,883 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 144 [2023-08-29 20:10:46,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:11:02,777 INFO L130 PetriNetUnfolder]: 202071/271701 cut-off events. [2023-08-29 20:11:02,777 INFO L131 PetriNetUnfolder]: For 13650/13650 co-relation queries the response was YES. [2023-08-29 20:11:03,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 537951 conditions, 271701 events. 202071/271701 cut-off events. For 13650/13650 co-relation queries the response was YES. Maximal size of possible extension queue 12250. Compared 2032782 event pairs, 202071 based on Foata normal form. 0/187961 useless extension candidates. Maximal degree in co-relation 537938. Up to 245761 conditions per place. [2023-08-29 20:11:04,771 INFO L137 encePairwiseOnDemand]: 142/144 looper letters, 29 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-08-29 20:11:04,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 40 transitions, 177 flow [2023-08-29 20:11:04,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:11:04,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:11:04,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 205 transitions. [2023-08-29 20:11:04,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47453703703703703 [2023-08-29 20:11:04,773 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 205 transitions. [2023-08-29 20:11:04,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 205 transitions. [2023-08-29 20:11:04,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:11:04,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 205 transitions. [2023-08-29 20:11:04,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states 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 20:11:04,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states 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 20:11:04,775 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states 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 20:11:04,776 INFO L175 Difference]: Start difference. First operand has 58 places, 41 transitions, 119 flow. Second operand 3 states and 205 transitions. [2023-08-29 20:11:04,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 40 transitions, 177 flow [2023-08-29 20:11:04,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 40 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 20:11:04,781 INFO L231 Difference]: Finished difference. Result has 58 places, 40 transitions, 118 flow [2023-08-29 20:11:04,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=58, PETRI_TRANSITIONS=40} [2023-08-29 20:11:04,782 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -1 predicate places. [2023-08-29 20:11:04,782 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 40 transitions, 118 flow [2023-08-29 20:11:04,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states 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 20:11:04,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:11:04,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 20:11:04,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-29 20:11:04,783 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 8 more)] === [2023-08-29 20:11:04,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:11:04,784 INFO L85 PathProgramCache]: Analyzing trace with hash 34035498, now seen corresponding path program 1 times [2023-08-29 20:11:04,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:11:04,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137698915] [2023-08-29 20:11:04,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:11:04,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:11:04,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:11:04,816 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 20:11:04,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:11:04,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137698915] [2023-08-29 20:11:04,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137698915] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:11:04,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:11:04,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:11:04,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183768578] [2023-08-29 20:11:04,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:11:04,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:11:04,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:11:04,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:11:04,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:11:04,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 144 [2023-08-29 20:11:04,825 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 40 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states 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 20:11:04,825 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:11:04,825 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 144 [2023-08-29 20:11:04,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:11:16,523 INFO L130 PetriNetUnfolder]: 164558/202770 cut-off events. [2023-08-29 20:11:16,523 INFO L131 PetriNetUnfolder]: For 13356/13356 co-relation queries the response was YES. [2023-08-29 20:11:17,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 418528 conditions, 202770 events. 164558/202770 cut-off events. For 13356/13356 co-relation queries the response was YES. Maximal size of possible extension queue 10263. Compared 1154235 event pairs, 60109 based on Foata normal form. 0/144041 useless extension candidates. Maximal degree in co-relation 418514. Up to 200278 conditions per place. [2023-08-29 20:11:18,200 INFO L137 encePairwiseOnDemand]: 129/144 looper letters, 43 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2023-08-29 20:11:18,200 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 61 transitions, 292 flow [2023-08-29 20:11:18,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:11:18,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:11:18,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 226 transitions. [2023-08-29 20:11:18,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5231481481481481 [2023-08-29 20:11:18,209 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 226 transitions. [2023-08-29 20:11:18,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 226 transitions. [2023-08-29 20:11:18,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:11:18,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 226 transitions. [2023-08-29 20:11:18,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states 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 20:11:18,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states 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 20:11:18,230 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states 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 20:11:18,230 INFO L175 Difference]: Start difference. First operand has 58 places, 40 transitions, 118 flow. Second operand 3 states and 226 transitions. [2023-08-29 20:11:18,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 61 transitions, 292 flow [2023-08-29 20:11:18,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 61 transitions, 291 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 20:11:18,259 INFO L231 Difference]: Finished difference. Result has 60 places, 47 transitions, 183 flow [2023-08-29 20:11:18,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=183, PETRI_PLACES=60, PETRI_TRANSITIONS=47} [2023-08-29 20:11:18,259 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 1 predicate places. [2023-08-29 20:11:18,260 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 47 transitions, 183 flow [2023-08-29 20:11:18,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states 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 20:11:18,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:11:18,260 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 20:11:18,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-29 20:11:18,260 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 8 more)] === [2023-08-29 20:11:18,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:11:18,260 INFO L85 PathProgramCache]: Analyzing trace with hash 721010339, now seen corresponding path program 1 times [2023-08-29 20:11:18,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:11:18,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315851891] [2023-08-29 20:11:18,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:11:18,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:11:18,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:11:18,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 20:11:18,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:11:18,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315851891] [2023-08-29 20:11:18,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315851891] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:11:18,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:11:18,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 20:11:18,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642336978] [2023-08-29 20:11:18,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:11:18,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:11:18,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:11:18,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:11:18,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:11:18,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 144 [2023-08-29 20:11:18,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 47 transitions, 183 flow. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states 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 20:11:18,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:11:18,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 144 [2023-08-29 20:11:18,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:11:31,437 INFO L130 PetriNetUnfolder]: 202071/246079 cut-off events. [2023-08-29 20:11:31,437 INFO L131 PetriNetUnfolder]: For 64830/64830 co-relation queries the response was YES. [2023-08-29 20:11:32,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 595334 conditions, 246079 events. 202071/246079 cut-off events. For 64830/64830 co-relation queries the response was YES. Maximal size of possible extension queue 8505. Compared 1325098 event pairs, 60901 based on Foata normal form. 58602/304353 useless extension candidates. Maximal degree in co-relation 595318. Up to 243840 conditions per place. [2023-08-29 20:11:32,342 INFO L137 encePairwiseOnDemand]: 130/144 looper letters, 0 selfloop transitions, 0 changer transitions 61/61 dead transitions. [2023-08-29 20:11:32,343 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 61 transitions, 343 flow [2023-08-29 20:11:32,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:11:32,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:11:32,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 226 transitions. [2023-08-29 20:11:32,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5231481481481481 [2023-08-29 20:11:32,344 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 226 transitions. [2023-08-29 20:11:32,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 226 transitions. [2023-08-29 20:11:32,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:11:32,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 226 transitions. [2023-08-29 20:11:32,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states 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 20:11:32,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states 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 20:11:32,345 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states 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 20:11:32,346 INFO L175 Difference]: Start difference. First operand has 60 places, 47 transitions, 183 flow. Second operand 3 states and 226 transitions. [2023-08-29 20:11:32,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 61 transitions, 343 flow [2023-08-29 20:11:32,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 335 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 20:11:32,420 INFO L231 Difference]: Finished difference. Result has 54 places, 0 transitions, 0 flow [2023-08-29 20:11:32,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=54, PETRI_TRANSITIONS=0} [2023-08-29 20:11:32,421 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -5 predicate places. [2023-08-29 20:11:32,421 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 0 transitions, 0 flow [2023-08-29 20:11:32,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states 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 20:11:32,421 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (10 of 11 remaining) [2023-08-29 20:11:32,422 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2023-08-29 20:11:32,422 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (8 of 11 remaining) [2023-08-29 20:11:32,422 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (7 of 11 remaining) [2023-08-29 20:11:32,422 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 11 remaining) [2023-08-29 20:11:32,422 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (5 of 11 remaining) [2023-08-29 20:11:32,422 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 11 remaining) [2023-08-29 20:11:32,422 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 11 remaining) [2023-08-29 20:11:32,422 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 11 remaining) [2023-08-29 20:11:32,422 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 11 remaining) [2023-08-29 20:11:32,423 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 11 remaining) [2023-08-29 20:11:32,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-29 20:11:32,423 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-29 20:11:32,423 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 20:11:32,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 87 transitions, 251 flow [2023-08-29 20:11:32,433 INFO L130 PetriNetUnfolder]: 8/204 cut-off events. [2023-08-29 20:11:32,433 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-29 20:11:32,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 204 events. 8/204 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 442 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 208. Up to 16 conditions per place. [2023-08-29 20:11:32,433 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 87 transitions, 251 flow [2023-08-29 20:11:32,434 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 76 transitions, 229 flow [2023-08-29 20:11:32,434 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 20:11:32,434 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 91 places, 76 transitions, 229 flow [2023-08-29 20:11:32,434 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 91 places, 76 transitions, 229 flow [2023-08-29 20:11:32,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 76 transitions, 229 flow [2023-08-29 20:11:32,440 INFO L130 PetriNetUnfolder]: 0/116 cut-off events. [2023-08-29 20:11:32,440 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-29 20:11:32,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 116 events. 0/116 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 105 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 0. Up to 8 conditions per place. [2023-08-29 20:11:32,441 INFO L119 LiptonReduction]: Number of co-enabled transitions 3038 [2023-08-29 20:11:33,558 INFO L134 LiptonReduction]: Checked pairs total: 9327 [2023-08-29 20:11:33,558 INFO L136 LiptonReduction]: Total number of compositions: 47 [2023-08-29 20:11:33,559 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 20:11:33,559 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;@77458983, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 20:11:33,559 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 20:11:33,562 INFO L130 PetriNetUnfolder]: 0/49 cut-off events. [2023-08-29 20:11:33,562 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-29 20:11:33,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:11:33,562 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 20:11:33,562 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 20:11:33,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:11:33,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1466961374, now seen corresponding path program 1 times [2023-08-29 20:11:33,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:11:33,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522877712] [2023-08-29 20:11:33,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:11:33,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:11:33,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 20:11:33,590 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 20:11:33,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 20:11:33,616 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 20:11:33,618 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 20:11:33,618 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 20:11:33,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-29 20:11:33,618 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 20:11:33,618 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 20:11:33,618 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 20:11:33,619 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-29 20:11:33,629 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 20:11:33,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 95 transitions, 286 flow [2023-08-29 20:11:33,640 INFO L130 PetriNetUnfolder]: 9/229 cut-off events. [2023-08-29 20:11:33,640 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-29 20:11:33,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290 conditions, 229 events. 9/229 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 495 event pairs, 0 based on Foata normal form. 0/176 useless extension candidates. Maximal degree in co-relation 243. Up to 18 conditions per place. [2023-08-29 20:11:33,642 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 95 transitions, 286 flow [2023-08-29 20:11:33,642 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 95 transitions, 286 flow [2023-08-29 20:11:33,642 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 20:11:33,643 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 111 places, 95 transitions, 286 flow [2023-08-29 20:11:33,643 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 111 places, 95 transitions, 286 flow [2023-08-29 20:11:33,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 95 transitions, 286 flow [2023-08-29 20:11:33,653 INFO L130 PetriNetUnfolder]: 9/229 cut-off events. [2023-08-29 20:11:33,653 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-29 20:11:33,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290 conditions, 229 events. 9/229 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 495 event pairs, 0 based on Foata normal form. 0/176 useless extension candidates. Maximal degree in co-relation 243. Up to 18 conditions per place. [2023-08-29 20:11:33,657 INFO L119 LiptonReduction]: Number of co-enabled transitions 5152 [2023-08-29 20:11:34,756 INFO L134 LiptonReduction]: Checked pairs total: 12032 [2023-08-29 20:11:34,757 INFO L136 LiptonReduction]: Total number of compositions: 61 [2023-08-29 20:11:34,757 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 20:11:34,758 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;@77458983, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 20:11:34,758 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-08-29 20:11:34,758 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 20:11:34,758 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:11:34,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:11:34,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 20:11:34,758 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 20:11:34,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:11:34,758 INFO L85 PathProgramCache]: Analyzing trace with hash 42100, now seen corresponding path program 1 times [2023-08-29 20:11:34,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:11:34,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231979326] [2023-08-29 20:11:34,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:11:34,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:11:34,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:11:34,774 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 20:11:34,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:11:34,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231979326] [2023-08-29 20:11:34,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231979326] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:11:34,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:11:34,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:11:34,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134999050] [2023-08-29 20:11:34,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:11:34,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:11:34,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:11:34,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:11:34,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:11:34,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2023-08-29 20:11:34,789 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 49 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states 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 20:11:34,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:11:34,789 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2023-08-29 20:11:34,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand