./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c --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/weaver/popl20-difference-det.wvr.c -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 739dc04b5c5aa67083a96cc98ccb84e17de2a97ca235c28aa84e8c99a10b0a9e --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 [2023-08-30 00:02:47,785 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:02:47,788 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:02:47,831 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:02:47,831 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:02:47,835 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:02:47,838 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:02:47,841 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:02:47,843 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:02:47,849 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:02:47,851 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:02:47,853 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:02:47,854 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:02:47,856 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:02:47,857 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:02:47,859 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:02:47,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:02:47,863 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:02:47,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:02:47,869 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:02:47,873 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:02:47,875 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:02:47,882 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:02:47,883 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:02:47,886 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:02:47,887 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:02:47,887 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:02:47,888 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:02:47,888 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:02:47,889 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:02:47,890 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:02:47,890 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:02:47,891 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:02:47,892 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:02:47,892 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:02:47,893 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:02:47,893 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:02:47,894 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:02:47,894 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:02:47,895 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:02:47,896 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:02:47,898 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 00:02:47,941 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:02:47,942 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:02:47,943 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:02:47,943 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:02:47,944 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:02:47,944 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:02:47,945 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:02:47,945 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:02:47,945 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:02:47,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:02:47,946 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:02:47,947 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:02:47,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:02:47,947 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:02:47,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:02:47,947 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:02:47,947 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:02:47,948 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:02:47,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:02:47,948 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:02:47,948 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:02:47,949 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:02:47,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:02:47,949 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:02:47,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:02:47,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:02:47,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:02:47,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:02:47,950 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 00:02:47,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 00:02:47,950 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:02:47,951 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:02:47,951 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:02:47,951 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:02:47,951 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 739dc04b5c5aa67083a96cc98ccb84e17de2a97ca235c28aa84e8c99a10b0a9e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:02:48,279 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:02:48,305 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:02:48,308 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:02:48,309 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:02:48,309 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:02:48,311 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2023-08-30 00:02:49,438 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:02:49,671 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:02:49,671 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2023-08-30 00:02:49,678 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c16fef41/148fe200fffe44ccbd506597064058ce/FLAGb2c85d4b6 [2023-08-30 00:02:49,692 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c16fef41/148fe200fffe44ccbd506597064058ce [2023-08-30 00:02:49,695 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:02:49,696 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:02:49,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:02:49,698 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:02:49,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:02:49,707 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:02:49" (1/1) ... [2023-08-30 00:02:49,708 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20861e5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:02:49, skipping insertion in model container [2023-08-30 00:02:49,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:02:49" (1/1) ... [2023-08-30 00:02:49,716 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:02:49,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:02:49,868 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c[2507,2520] [2023-08-30 00:02:49,878 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:02:49,892 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 00:02:49,918 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c[2507,2520] [2023-08-30 00:02:49,923 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:02:49,940 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:02:49,940 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:02:49,946 INFO L208 MainTranslator]: Completed translation [2023-08-30 00:02:49,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:02:49 WrapperNode [2023-08-30 00:02:49,947 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:02:49,949 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 00:02:49,949 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 00:02:49,949 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 00:02:49,955 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:02:49" (1/1) ... [2023-08-30 00:02:49,973 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:02:49" (1/1) ... [2023-08-30 00:02:50,010 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 122 [2023-08-30 00:02:50,011 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 00:02:50,013 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 00:02:50,013 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 00:02:50,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 00:02:50,021 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:02:49" (1/1) ... [2023-08-30 00:02:50,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:02:49" (1/1) ... [2023-08-30 00:02:50,035 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:02:49" (1/1) ... [2023-08-30 00:02:50,035 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:02:49" (1/1) ... [2023-08-30 00:02:50,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:02:49" (1/1) ... [2023-08-30 00:02:50,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:02:49" (1/1) ... [2023-08-30 00:02:50,059 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:02:49" (1/1) ... [2023-08-30 00:02:50,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:02:49" (1/1) ... [2023-08-30 00:02:50,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 00:02:50,069 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 00:02:50,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 00:02:50,070 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 00:02:50,072 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:02:49" (1/1) ... [2023-08-30 00:02:50,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:02:50,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:02:50,110 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) [2023-08-30 00:02:50,135 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 [2023-08-30 00:02:50,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 00:02:50,150 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 00:02:50,150 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 00:02:50,151 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 00:02:50,151 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 00:02:50,151 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 00:02:50,151 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 00:02:50,151 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-30 00:02:50,151 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-30 00:02:50,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 00:02:50,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 00:02:50,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 00:02:50,152 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 00:02:50,152 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 00:02:50,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 00:02:50,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 00:02:50,153 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 00:02:50,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 00:02:50,154 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 00:02:50,273 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 00:02:50,275 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 00:02:50,621 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 00:02:50,688 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 00:02:50,688 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 00:02:50,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:02:50 BoogieIcfgContainer [2023-08-30 00:02:50,691 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 00:02:50,694 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 00:02:50,695 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 00:02:50,698 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 00:02:50,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 12:02:49" (1/3) ... [2023-08-30 00:02:50,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43d6e5ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:02:50, skipping insertion in model container [2023-08-30 00:02:50,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:02:49" (2/3) ... [2023-08-30 00:02:50,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43d6e5ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:02:50, skipping insertion in model container [2023-08-30 00:02:50,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:02:50" (3/3) ... [2023-08-30 00:02:50,701 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-difference-det.wvr.c [2023-08-30 00:02:50,716 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 00:02:50,717 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-08-30 00:02:50,717 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 00:02:50,825 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 00:02:50,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 145 transitions, 322 flow [2023-08-30 00:02:50,915 INFO L130 PetriNetUnfolder]: 9/141 cut-off events. [2023-08-30 00:02:50,915 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 00:02:50,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 141 events. 9/141 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 157 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 91. Up to 2 conditions per place. [2023-08-30 00:02:50,921 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 145 transitions, 322 flow [2023-08-30 00:02:50,926 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 137 transitions, 298 flow [2023-08-30 00:02:50,930 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 00:02:50,941 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 141 places, 137 transitions, 298 flow [2023-08-30 00:02:50,943 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 141 places, 137 transitions, 298 flow [2023-08-30 00:02:50,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 137 transitions, 298 flow [2023-08-30 00:02:50,973 INFO L130 PetriNetUnfolder]: 9/137 cut-off events. [2023-08-30 00:02:50,973 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 00:02:50,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 137 events. 9/137 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 156 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 91. Up to 2 conditions per place. [2023-08-30 00:02:50,988 INFO L119 LiptonReduction]: Number of co-enabled transitions 3160 [2023-08-30 00:02:55,257 INFO L134 LiptonReduction]: Checked pairs total: 3417 [2023-08-30 00:02:55,258 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-08-30 00:02:55,271 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 00:02:55,278 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;@792d686b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 00:02:55,278 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-08-30 00:02:55,281 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 00:02:55,281 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:02:55,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:02:55,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 00:02:55,283 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:02:55,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:02:55,288 INFO L85 PathProgramCache]: Analyzing trace with hash 580, now seen corresponding path program 1 times [2023-08-30 00:02:55,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:02:55,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670427222] [2023-08-30 00:02:55,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:02:55,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:02:55,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:02:55,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:02:55,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:02:55,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670427222] [2023-08-30 00:02:55,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670427222] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:02:55,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:02:55,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 00:02:55,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751323630] [2023-08-30 00:02:55,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:02:55,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 00:02:55,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:02:55,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 00:02:55,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 00:02:55,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 272 [2023-08-30 00:02:55,420 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 116 flow. Second operand has 2 states, 2 states have (on average 127.5) internal successors, (255), 2 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:55,420 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:02:55,420 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 272 [2023-08-30 00:02:55,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:02:55,818 INFO L130 PetriNetUnfolder]: 2524/3163 cut-off events. [2023-08-30 00:02:55,818 INFO L131 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2023-08-30 00:02:55,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6422 conditions, 3163 events. 2524/3163 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 11409 event pairs, 1182 based on Foata normal form. 0/1489 useless extension candidates. Maximal degree in co-relation 4966. Up to 3134 conditions per place. [2023-08-30 00:02:55,851 INFO L137 encePairwiseOnDemand]: 269/272 looper letters, 39 selfloop transitions, 0 changer transitions 0/43 dead transitions. [2023-08-30 00:02:55,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 43 transitions, 188 flow [2023-08-30 00:02:55,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 00:02:55,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 00:02:55,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 296 transitions. [2023-08-30 00:02:55,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5441176470588235 [2023-08-30 00:02:55,873 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 296 transitions. [2023-08-30 00:02:55,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 296 transitions. [2023-08-30 00:02:55,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:02:55,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 296 transitions. [2023-08-30 00:02:55,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 148.0) internal successors, (296), 2 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:55,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 272.0) internal successors, (816), 3 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:55,888 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 272.0) internal successors, (816), 3 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:55,889 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 116 flow. Second operand 2 states and 296 transitions. [2023-08-30 00:02:55,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 43 transitions, 188 flow [2023-08-30 00:02:55,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-30 00:02:55,908 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 94 flow [2023-08-30 00:02:55,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2023-08-30 00:02:55,914 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -10 predicate places. [2023-08-30 00:02:55,914 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 94 flow [2023-08-30 00:02:55,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 127.5) internal successors, (255), 2 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:55,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:02:55,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:02:55,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 00:02:55,919 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:02:55,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:02:55,920 INFO L85 PathProgramCache]: Analyzing trace with hash 571786, now seen corresponding path program 1 times [2023-08-30 00:02:55,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:02:55,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392480285] [2023-08-30 00:02:55,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:02:55,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:02:55,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:02:56,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:02:56,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:02:56,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392480285] [2023-08-30 00:02:56,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392480285] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:02:56,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:02:56,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:02:56,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007105708] [2023-08-30 00:02:56,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:02:56,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:02:56,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:02:56,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:02:56,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:02:56,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 272 [2023-08-30 00:02:56,371 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:56,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:02:56,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 272 [2023-08-30 00:02:56,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:02:56,638 INFO L130 PetriNetUnfolder]: 2413/3022 cut-off events. [2023-08-30 00:02:56,638 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 00:02:56,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6057 conditions, 3022 events. 2413/3022 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 10789 event pairs, 1127 based on Foata normal form. 0/1434 useless extension candidates. Maximal degree in co-relation 6054. Up to 2992 conditions per place. [2023-08-30 00:02:56,667 INFO L137 encePairwiseOnDemand]: 269/272 looper letters, 36 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-08-30 00:02:56,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 164 flow [2023-08-30 00:02:56,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:02:56,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:02:56,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 387 transitions. [2023-08-30 00:02:56,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742647058823529 [2023-08-30 00:02:56,671 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 387 transitions. [2023-08-30 00:02:56,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 387 transitions. [2023-08-30 00:02:56,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:02:56,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 387 transitions. [2023-08-30 00:02:56,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:56,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:56,677 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:56,677 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 94 flow. Second operand 3 states and 387 transitions. [2023-08-30 00:02:56,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 164 flow [2023-08-30 00:02:56,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 41 transitions, 164 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 00:02:56,679 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 92 flow [2023-08-30 00:02:56,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, 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=92, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-08-30 00:02:56,680 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -10 predicate places. [2023-08-30 00:02:56,681 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 92 flow [2023-08-30 00:02:56,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:56,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:02:56,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:02:56,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 00:02:56,682 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:02:56,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:02:56,685 INFO L85 PathProgramCache]: Analyzing trace with hash 571787, now seen corresponding path program 1 times [2023-08-30 00:02:56,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:02:56,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6921722] [2023-08-30 00:02:56,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:02:56,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:02:56,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:02:56,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:02:56,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:02:56,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6921722] [2023-08-30 00:02:56,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6921722] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:02:56,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:02:56,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:02:56,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490611727] [2023-08-30 00:02:56,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:02:56,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:02:56,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:02:56,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:02:56,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:02:56,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 272 [2023-08-30 00:02:56,900 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:56,900 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:02:56,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 272 [2023-08-30 00:02:56,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:02:57,139 INFO L130 PetriNetUnfolder]: 2302/2881 cut-off events. [2023-08-30 00:02:57,139 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 00:02:57,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5777 conditions, 2881 events. 2302/2881 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 10153 event pairs, 1072 based on Foata normal form. 0/1379 useless extension candidates. Maximal degree in co-relation 5773. Up to 2851 conditions per place. [2023-08-30 00:02:57,158 INFO L137 encePairwiseOnDemand]: 269/272 looper letters, 34 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2023-08-30 00:02:57,159 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 39 transitions, 158 flow [2023-08-30 00:02:57,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:02:57,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:02:57,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 403 transitions. [2023-08-30 00:02:57,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49387254901960786 [2023-08-30 00:02:57,161 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 403 transitions. [2023-08-30 00:02:57,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 403 transitions. [2023-08-30 00:02:57,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:02:57,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 403 transitions. [2023-08-30 00:02:57,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:57,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:57,165 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:57,165 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 92 flow. Second operand 3 states and 403 transitions. [2023-08-30 00:02:57,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 39 transitions, 158 flow [2023-08-30 00:02:57,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:02:57,167 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 89 flow [2023-08-30 00:02:57,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2023-08-30 00:02:57,168 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -11 predicate places. [2023-08-30 00:02:57,168 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 89 flow [2023-08-30 00:02:57,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:57,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:02:57,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:02:57,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 00:02:57,169 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:02:57,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:02:57,170 INFO L85 PathProgramCache]: Analyzing trace with hash 549501602, now seen corresponding path program 1 times [2023-08-30 00:02:57,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:02:57,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495130289] [2023-08-30 00:02:57,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:02:57,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:02:57,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:02:57,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:02:57,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:02:57,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495130289] [2023-08-30 00:02:57,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495130289] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:02:57,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:02:57,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:02:57,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043851203] [2023-08-30 00:02:57,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:02:57,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:02:57,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:02:57,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:02:57,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:02:57,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 272 [2023-08-30 00:02:57,310 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:57,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:02:57,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 272 [2023-08-30 00:02:57,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:02:57,520 INFO L130 PetriNetUnfolder]: 2256/2817 cut-off events. [2023-08-30 00:02:57,521 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 00:02:57,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5650 conditions, 2817 events. 2256/2817 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 9859 event pairs, 1050 based on Foata normal form. 0/1355 useless extension candidates. Maximal degree in co-relation 5646. Up to 2787 conditions per place. [2023-08-30 00:02:57,541 INFO L137 encePairwiseOnDemand]: 269/272 looper letters, 32 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-08-30 00:02:57,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 37 transitions, 151 flow [2023-08-30 00:02:57,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:02:57,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:02:57,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 401 transitions. [2023-08-30 00:02:57,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49142156862745096 [2023-08-30 00:02:57,544 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 401 transitions. [2023-08-30 00:02:57,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 401 transitions. [2023-08-30 00:02:57,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:02:57,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 401 transitions. [2023-08-30 00:02:57,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:57,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:57,548 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:57,548 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 89 flow. Second operand 3 states and 401 transitions. [2023-08-30 00:02:57,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 37 transitions, 151 flow [2023-08-30 00:02:57,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 37 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:02:57,550 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 86 flow [2023-08-30 00:02:57,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2023-08-30 00:02:57,551 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -12 predicate places. [2023-08-30 00:02:57,551 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 86 flow [2023-08-30 00:02:57,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:57,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:02:57,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:02:57,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 00:02:57,552 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:02:57,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:02:57,553 INFO L85 PathProgramCache]: Analyzing trace with hash 549501601, now seen corresponding path program 1 times [2023-08-30 00:02:57,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:02:57,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069670788] [2023-08-30 00:02:57,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:02:57,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:02:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:02:57,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:02:57,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:02:57,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069670788] [2023-08-30 00:02:57,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069670788] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:02:57,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:02:57,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:02:57,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173596038] [2023-08-30 00:02:57,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:02:57,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:02:57,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:02:57,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:02:57,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:02:57,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 272 [2023-08-30 00:02:57,670 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:57,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:02:57,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 272 [2023-08-30 00:02:57,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:02:57,845 INFO L130 PetriNetUnfolder]: 2210/2753 cut-off events. [2023-08-30 00:02:57,845 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 00:02:57,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5523 conditions, 2753 events. 2210/2753 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 9590 event pairs, 1028 based on Foata normal form. 0/1331 useless extension candidates. Maximal degree in co-relation 5519. Up to 2723 conditions per place. [2023-08-30 00:02:57,863 INFO L137 encePairwiseOnDemand]: 269/272 looper letters, 30 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2023-08-30 00:02:57,864 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 35 transitions, 144 flow [2023-08-30 00:02:57,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:02:57,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:02:57,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-08-30 00:02:57,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46691176470588236 [2023-08-30 00:02:57,866 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-08-30 00:02:57,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-08-30 00:02:57,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:02:57,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-08-30 00:02:57,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:57,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:57,870 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:57,870 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 86 flow. Second operand 3 states and 381 transitions. [2023-08-30 00:02:57,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 35 transitions, 144 flow [2023-08-30 00:02:57,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 35 transitions, 143 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:02:57,872 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 83 flow [2023-08-30 00:02:57,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=40, 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=83, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2023-08-30 00:02:57,873 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -13 predicate places. [2023-08-30 00:02:57,873 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 83 flow [2023-08-30 00:02:57,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:57,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:02:57,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:02:57,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 00:02:57,874 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:02:57,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:02:57,874 INFO L85 PathProgramCache]: Analyzing trace with hash -209926295, now seen corresponding path program 1 times [2023-08-30 00:02:57,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:02:57,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135517940] [2023-08-30 00:02:57,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:02:57,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:02:57,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:02:57,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:02:57,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:02:57,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135517940] [2023-08-30 00:02:57,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135517940] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:02:57,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:02:57,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:02:57,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36703586] [2023-08-30 00:02:57,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:02:57,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:02:57,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:02:57,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:02:57,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:02:57,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 272 [2023-08-30 00:02:57,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:57,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:02:57,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 272 [2023-08-30 00:02:57,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:02:58,134 INFO L130 PetriNetUnfolder]: 2107/2620 cut-off events. [2023-08-30 00:02:58,134 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 00:02:58,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5258 conditions, 2620 events. 2107/2620 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 9003 event pairs, 981 based on Foata normal form. 0/1284 useless extension candidates. Maximal degree in co-relation 5254. Up to 2590 conditions per place. [2023-08-30 00:02:58,149 INFO L137 encePairwiseOnDemand]: 269/272 looper letters, 28 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-08-30 00:02:58,150 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 33 transitions, 137 flow [2023-08-30 00:02:58,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:02:58,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:02:58,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 397 transitions. [2023-08-30 00:02:58,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48651960784313725 [2023-08-30 00:02:58,153 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 397 transitions. [2023-08-30 00:02:58,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 397 transitions. [2023-08-30 00:02:58,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:02:58,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 397 transitions. [2023-08-30 00:02:58,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:58,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:58,156 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:58,156 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 83 flow. Second operand 3 states and 397 transitions. [2023-08-30 00:02:58,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 33 transitions, 137 flow [2023-08-30 00:02:58,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 33 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:02:58,158 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 80 flow [2023-08-30 00:02:58,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2023-08-30 00:02:58,159 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -14 predicate places. [2023-08-30 00:02:58,159 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 80 flow [2023-08-30 00:02:58,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:58,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:02:58,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:02:58,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 00:02:58,160 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:02:58,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:02:58,161 INFO L85 PathProgramCache]: Analyzing trace with hash -209926294, now seen corresponding path program 1 times [2023-08-30 00:02:58,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:02:58,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486650990] [2023-08-30 00:02:58,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:02:58,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:02:58,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:02:58,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:02:58,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:02:58,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486650990] [2023-08-30 00:02:58,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486650990] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:02:58,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:02:58,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:02:58,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938392052] [2023-08-30 00:02:58,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:02:58,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:02:58,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:02:58,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:02:58,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:02:58,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 272 [2023-08-30 00:02:58,236 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:58,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:02:58,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 272 [2023-08-30 00:02:58,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:02:58,396 INFO L130 PetriNetUnfolder]: 2004/2487 cut-off events. [2023-08-30 00:02:58,397 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 00:02:58,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4993 conditions, 2487 events. 2004/2487 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 8420 event pairs, 934 based on Foata normal form. 0/1237 useless extension candidates. Maximal degree in co-relation 4989. Up to 2457 conditions per place. [2023-08-30 00:02:58,411 INFO L137 encePairwiseOnDemand]: 269/272 looper letters, 26 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-30 00:02:58,411 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 31 transitions, 130 flow [2023-08-30 00:02:58,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:02:58,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:02:58,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2023-08-30 00:02:58,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46200980392156865 [2023-08-30 00:02:58,413 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 377 transitions. [2023-08-30 00:02:58,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 377 transitions. [2023-08-30 00:02:58,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:02:58,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 377 transitions. [2023-08-30 00:02:58,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:58,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:58,416 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:58,417 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 80 flow. Second operand 3 states and 377 transitions. [2023-08-30 00:02:58,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 31 transitions, 130 flow [2023-08-30 00:02:58,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 31 transitions, 129 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:02:58,418 INFO L231 Difference]: Finished difference. Result has 40 places, 31 transitions, 77 flow [2023-08-30 00:02:58,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=38, 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=77, PETRI_PLACES=40, PETRI_TRANSITIONS=31} [2023-08-30 00:02:58,419 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -15 predicate places. [2023-08-30 00:02:58,419 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 31 transitions, 77 flow [2023-08-30 00:02:58,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:58,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:02:58,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:02:58,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 00:02:58,420 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:02:58,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:02:58,421 INFO L85 PathProgramCache]: Analyzing trace with hash 124305830, now seen corresponding path program 1 times [2023-08-30 00:02:58,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:02:58,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437037899] [2023-08-30 00:02:58,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:02:58,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:02:58,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:02:58,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:02:58,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:02:58,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437037899] [2023-08-30 00:02:58,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437037899] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:02:58,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:02:58,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 00:02:58,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982169792] [2023-08-30 00:02:58,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:02:58,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:02:58,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:02:58,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:02:58,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:02:58,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 272 [2023-08-30 00:02:58,638 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 77 flow. Second operand has 6 states, 6 states have (on average 105.5) internal successors, (633), 6 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:58,638 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:02:58,638 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 272 [2023-08-30 00:02:58,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:02:58,799 INFO L130 PetriNetUnfolder]: 1590/1992 cut-off events. [2023-08-30 00:02:58,799 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 00:02:58,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4004 conditions, 1992 events. 1590/1992 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 6624 event pairs, 736 based on Foata normal form. 0/1039 useless extension candidates. Maximal degree in co-relation 4000. Up to 1962 conditions per place. [2023-08-30 00:02:58,811 INFO L137 encePairwiseOnDemand]: 270/272 looper letters, 25 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-30 00:02:58,811 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 30 transitions, 127 flow [2023-08-30 00:02:58,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:02:58,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:02:58,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 339 transitions. [2023-08-30 00:02:58,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41544117647058826 [2023-08-30 00:02:58,813 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 339 transitions. [2023-08-30 00:02:58,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 339 transitions. [2023-08-30 00:02:58,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:02:58,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 339 transitions. [2023-08-30 00:02:58,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:58,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:58,815 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:58,816 INFO L175 Difference]: Start difference. First operand has 40 places, 31 transitions, 77 flow. Second operand 3 states and 339 transitions. [2023-08-30 00:02:58,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 30 transitions, 127 flow [2023-08-30 00:02:58,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 30 transitions, 126 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:02:58,817 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 76 flow [2023-08-30 00:02:58,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=38, 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=76, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-08-30 00:02:58,818 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -15 predicate places. [2023-08-30 00:02:58,818 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 76 flow [2023-08-30 00:02:58,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 105.5) internal successors, (633), 6 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:58,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:02:58,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:02:58,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 00:02:58,818 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:02:58,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:02:58,819 INFO L85 PathProgramCache]: Analyzing trace with hash 124305831, now seen corresponding path program 1 times [2023-08-30 00:02:58,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:02:58,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723311907] [2023-08-30 00:02:58,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:02:58,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:02:58,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:02:58,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:02:58,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:02:58,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723311907] [2023-08-30 00:02:58,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723311907] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:02:58,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:02:58,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:02:58,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729258561] [2023-08-30 00:02:58,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:02:58,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:02:58,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:02:58,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:02:58,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:02:59,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 272 [2023-08-30 00:02:59,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:59,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:02:59,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 272 [2023-08-30 00:02:59,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:02:59,161 INFO L130 PetriNetUnfolder]: 1176/1497 cut-off events. [2023-08-30 00:02:59,162 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 00:02:59,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3015 conditions, 1497 events. 1176/1497 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4863 event pairs, 538 based on Foata normal form. 0/841 useless extension candidates. Maximal degree in co-relation 3011. Up to 1467 conditions per place. [2023-08-30 00:02:59,170 INFO L137 encePairwiseOnDemand]: 270/272 looper letters, 24 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-08-30 00:02:59,171 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 29 transitions, 124 flow [2023-08-30 00:02:59,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:02:59,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:02:59,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 392 transitions. [2023-08-30 00:02:59,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4803921568627451 [2023-08-30 00:02:59,173 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 392 transitions. [2023-08-30 00:02:59,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 392 transitions. [2023-08-30 00:02:59,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:02:59,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 392 transitions. [2023-08-30 00:02:59,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:59,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:59,176 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:59,176 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 76 flow. Second operand 3 states and 392 transitions. [2023-08-30 00:02:59,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 29 transitions, 124 flow [2023-08-30 00:02:59,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 29 transitions, 123 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:02:59,178 INFO L231 Difference]: Finished difference. Result has 40 places, 29 transitions, 75 flow [2023-08-30 00:02:59,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=40, PETRI_TRANSITIONS=29} [2023-08-30 00:02:59,180 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -15 predicate places. [2023-08-30 00:02:59,180 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 29 transitions, 75 flow [2023-08-30 00:02:59,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:59,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:02:59,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:02:59,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 00:02:59,181 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:02:59,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:02:59,182 INFO L85 PathProgramCache]: Analyzing trace with hash 32800811, now seen corresponding path program 1 times [2023-08-30 00:02:59,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:02:59,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909975493] [2023-08-30 00:02:59,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:02:59,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:02:59,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:02:59,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:02:59,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:02:59,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909975493] [2023-08-30 00:02:59,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909975493] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:02:59,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:02:59,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:02:59,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825299002] [2023-08-30 00:02:59,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:02:59,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:02:59,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:02:59,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:02:59,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:02:59,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 272 [2023-08-30 00:02:59,327 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 29 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:59,327 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:02:59,327 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 272 [2023-08-30 00:02:59,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:02:59,483 INFO L130 PetriNetUnfolder]: 1537/1954 cut-off events. [2023-08-30 00:02:59,484 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2023-08-30 00:02:59,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3956 conditions, 1954 events. 1537/1954 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6401 event pairs, 141 based on Foata normal form. 1/1126 useless extension candidates. Maximal degree in co-relation 3952. Up to 1733 conditions per place. [2023-08-30 00:02:59,495 INFO L137 encePairwiseOnDemand]: 266/272 looper letters, 41 selfloop transitions, 5 changer transitions 1/51 dead transitions. [2023-08-30 00:02:59,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 51 transitions, 220 flow [2023-08-30 00:02:59,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:02:59,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:02:59,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 423 transitions. [2023-08-30 00:02:59,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5183823529411765 [2023-08-30 00:02:59,498 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 423 transitions. [2023-08-30 00:02:59,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 423 transitions. [2023-08-30 00:02:59,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:02:59,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 423 transitions. [2023-08-30 00:02:59,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:59,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:59,501 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:59,501 INFO L175 Difference]: Start difference. First operand has 40 places, 29 transitions, 75 flow. Second operand 3 states and 423 transitions. [2023-08-30 00:02:59,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 51 transitions, 220 flow [2023-08-30 00:02:59,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 51 transitions, 219 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:02:59,503 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 107 flow [2023-08-30 00:02:59,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2023-08-30 00:02:59,504 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -13 predicate places. [2023-08-30 00:02:59,504 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 107 flow [2023-08-30 00:02:59,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:59,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:02:59,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:02:59,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 00:02:59,505 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:02:59,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:02:59,506 INFO L85 PathProgramCache]: Analyzing trace with hash -63029285, now seen corresponding path program 1 times [2023-08-30 00:02:59,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:02:59,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802705538] [2023-08-30 00:02:59,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:02:59,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:02:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:02:59,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:02:59,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:02:59,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802705538] [2023-08-30 00:02:59,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802705538] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:02:59,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:02:59,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 00:02:59,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962843497] [2023-08-30 00:02:59,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:02:59,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:02:59,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:02:59,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:02:59,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:02:59,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 272 [2023-08-30 00:02:59,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 107 flow. Second operand has 5 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:59,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:02:59,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 272 [2023-08-30 00:02:59,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:02:59,906 INFO L130 PetriNetUnfolder]: 2315/3045 cut-off events. [2023-08-30 00:02:59,907 INFO L131 PetriNetUnfolder]: For 844/844 co-relation queries the response was YES. [2023-08-30 00:02:59,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7475 conditions, 3045 events. 2315/3045 cut-off events. For 844/844 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 12248 event pairs, 620 based on Foata normal form. 34/3049 useless extension candidates. Maximal degree in co-relation 7470. Up to 1705 conditions per place. [2023-08-30 00:02:59,926 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 80 selfloop transitions, 5 changer transitions 0/87 dead transitions. [2023-08-30 00:02:59,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 87 transitions, 442 flow [2023-08-30 00:02:59,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:02:59,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:02:59,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 669 transitions. [2023-08-30 00:02:59,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4919117647058823 [2023-08-30 00:02:59,929 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 669 transitions. [2023-08-30 00:02:59,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 669 transitions. [2023-08-30 00:02:59,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:02:59,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 669 transitions. [2023-08-30 00:02:59,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 133.8) internal successors, (669), 5 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:59,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:59,934 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:59,934 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 107 flow. Second operand 5 states and 669 transitions. [2023-08-30 00:02:59,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 87 transitions, 442 flow [2023-08-30 00:02:59,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 87 transitions, 429 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:02:59,936 INFO L231 Difference]: Finished difference. Result has 48 places, 36 transitions, 137 flow [2023-08-30 00:02:59,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=137, PETRI_PLACES=48, PETRI_TRANSITIONS=36} [2023-08-30 00:02:59,937 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -7 predicate places. [2023-08-30 00:02:59,937 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 36 transitions, 137 flow [2023-08-30 00:02:59,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:59,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:02:59,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:02:59,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 00:02:59,938 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:02:59,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:02:59,939 INFO L85 PathProgramCache]: Analyzing trace with hash 241380879, now seen corresponding path program 1 times [2023-08-30 00:02:59,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:02:59,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242379198] [2023-08-30 00:02:59,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:02:59,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:02:59,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:03:00,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:00,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:03:00,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242379198] [2023-08-30 00:03:00,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242379198] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:03:00,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802883457] [2023-08-30 00:03:00,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:03:00,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:03:00,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:03:00,013 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:03:00,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 00:03:00,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:03:00,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 00:03:00,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:03:00,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:00,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:03:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:00,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802883457] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:03:00,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:03:00,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-30 00:03:00,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415406216] [2023-08-30 00:03:00,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:03:00,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:03:00,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:03:00,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:03:00,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:03:00,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-08-30 00:03:00,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 36 transitions, 137 flow. Second operand has 8 states, 8 states have (on average 120.75) internal successors, (966), 8 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:00,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:03:00,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-08-30 00:03:00,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:03:00,751 INFO L130 PetriNetUnfolder]: 3231/4291 cut-off events. [2023-08-30 00:03:00,752 INFO L131 PetriNetUnfolder]: For 3518/3899 co-relation queries the response was YES. [2023-08-30 00:03:00,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11993 conditions, 4291 events. 3231/4291 cut-off events. For 3518/3899 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 19750 event pairs, 339 based on Foata normal form. 477/4675 useless extension candidates. Maximal degree in co-relation 11985. Up to 1856 conditions per place. [2023-08-30 00:03:00,780 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 89 selfloop transitions, 5 changer transitions 0/97 dead transitions. [2023-08-30 00:03:00,781 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 97 transitions, 540 flow [2023-08-30 00:03:00,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:03:00,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:03:00,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 665 transitions. [2023-08-30 00:03:00,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4889705882352941 [2023-08-30 00:03:00,783 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 665 transitions. [2023-08-30 00:03:00,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 665 transitions. [2023-08-30 00:03:00,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:03:00,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 665 transitions. [2023-08-30 00:03:00,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:00,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:00,788 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:00,788 INFO L175 Difference]: Start difference. First operand has 48 places, 36 transitions, 137 flow. Second operand 5 states and 665 transitions. [2023-08-30 00:03:00,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 97 transitions, 540 flow [2023-08-30 00:03:00,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 97 transitions, 521 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 00:03:00,796 INFO L231 Difference]: Finished difference. Result has 54 places, 39 transitions, 167 flow [2023-08-30 00:03:00,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=167, PETRI_PLACES=54, PETRI_TRANSITIONS=39} [2023-08-30 00:03:00,799 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2023-08-30 00:03:00,799 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 39 transitions, 167 flow [2023-08-30 00:03:00,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 120.75) internal successors, (966), 8 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:00,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:03:00,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:03:00,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 00:03:01,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-30 00:03:01,007 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:03:01,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:03:01,007 INFO L85 PathProgramCache]: Analyzing trace with hash -921950725, now seen corresponding path program 2 times [2023-08-30 00:03:01,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:03:01,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562541948] [2023-08-30 00:03:01,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:03:01,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:03:01,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:03:01,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:01,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:03:01,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562541948] [2023-08-30 00:03:01,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562541948] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:03:01,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:03:01,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 00:03:01,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58754552] [2023-08-30 00:03:01,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:03:01,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:03:01,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:03:01,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:03:01,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:03:01,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 272 [2023-08-30 00:03:01,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 39 transitions, 167 flow. Second operand has 5 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:01,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:03:01,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 272 [2023-08-30 00:03:01,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:03:01,722 INFO L130 PetriNetUnfolder]: 4823/6498 cut-off events. [2023-08-30 00:03:01,722 INFO L131 PetriNetUnfolder]: For 8653/9187 co-relation queries the response was YES. [2023-08-30 00:03:01,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19894 conditions, 6498 events. 4823/6498 cut-off events. For 8653/9187 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 31847 event pairs, 1245 based on Foata normal form. 571/6979 useless extension candidates. Maximal degree in co-relation 19883. Up to 3423 conditions per place. [2023-08-30 00:03:01,774 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 95 selfloop transitions, 7 changer transitions 0/105 dead transitions. [2023-08-30 00:03:01,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 105 transitions, 630 flow [2023-08-30 00:03:01,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:03:01,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:03:01,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 673 transitions. [2023-08-30 00:03:01,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4948529411764706 [2023-08-30 00:03:01,777 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 673 transitions. [2023-08-30 00:03:01,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 673 transitions. [2023-08-30 00:03:01,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:03:01,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 673 transitions. [2023-08-30 00:03:01,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.6) internal successors, (673), 5 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:01,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:01,781 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:01,781 INFO L175 Difference]: Start difference. First operand has 54 places, 39 transitions, 167 flow. Second operand 5 states and 673 transitions. [2023-08-30 00:03:01,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 105 transitions, 630 flow [2023-08-30 00:03:01,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 105 transitions, 625 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 00:03:01,795 INFO L231 Difference]: Finished difference. Result has 60 places, 42 transitions, 211 flow [2023-08-30 00:03:01,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=211, PETRI_PLACES=60, PETRI_TRANSITIONS=42} [2023-08-30 00:03:01,797 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 5 predicate places. [2023-08-30 00:03:01,797 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 42 transitions, 211 flow [2023-08-30 00:03:01,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:01,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:03:01,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:03:01,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 00:03:01,798 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:03:01,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:03:01,798 INFO L85 PathProgramCache]: Analyzing trace with hash 550245957, now seen corresponding path program 2 times [2023-08-30 00:03:01,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:03:01,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116244791] [2023-08-30 00:03:01,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:03:01,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:03:01,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:03:01,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:01,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:03:01,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116244791] [2023-08-30 00:03:01,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116244791] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:03:01,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136779095] [2023-08-30 00:03:01,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:03:01,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:03:01,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:03:01,897 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:03:01,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 00:03:02,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:03:02,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:03:02,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 00:03:02,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:03:02,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:02,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:03:02,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:02,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136779095] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:03:02,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:03:02,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-30 00:03:02,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156460329] [2023-08-30 00:03:02,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:03:02,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:03:02,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:03:02,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:03:02,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:03:02,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-08-30 00:03:02,127 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 42 transitions, 211 flow. Second operand has 8 states, 8 states have (on average 120.75) internal successors, (966), 8 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:02,127 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:03:02,127 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-08-30 00:03:02,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:03:03,029 INFO L130 PetriNetUnfolder]: 6729/9130 cut-off events. [2023-08-30 00:03:03,029 INFO L131 PetriNetUnfolder]: For 17455/18932 co-relation queries the response was YES. [2023-08-30 00:03:03,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31362 conditions, 9130 events. 6729/9130 cut-off events. For 17455/18932 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 47787 event pairs, 883 based on Foata normal form. 1627/10614 useless extension candidates. Maximal degree in co-relation 31348. Up to 3720 conditions per place. [2023-08-30 00:03:03,104 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 101 selfloop transitions, 6 changer transitions 0/111 dead transitions. [2023-08-30 00:03:03,104 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 111 transitions, 756 flow [2023-08-30 00:03:03,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:03:03,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:03:03,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 663 transitions. [2023-08-30 00:03:03,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2023-08-30 00:03:03,106 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 663 transitions. [2023-08-30 00:03:03,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 663 transitions. [2023-08-30 00:03:03,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:03:03,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 663 transitions. [2023-08-30 00:03:03,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 132.6) internal successors, (663), 5 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:03,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:03,111 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:03,111 INFO L175 Difference]: Start difference. First operand has 60 places, 42 transitions, 211 flow. Second operand 5 states and 663 transitions. [2023-08-30 00:03:03,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 111 transitions, 756 flow [2023-08-30 00:03:03,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 111 transitions, 716 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-08-30 00:03:03,130 INFO L231 Difference]: Finished difference. Result has 66 places, 45 transitions, 242 flow [2023-08-30 00:03:03,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=242, PETRI_PLACES=66, PETRI_TRANSITIONS=45} [2023-08-30 00:03:03,130 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 11 predicate places. [2023-08-30 00:03:03,131 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 45 transitions, 242 flow [2023-08-30 00:03:03,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 120.75) internal successors, (966), 8 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:03,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:03:03,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:03:03,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 00:03:03,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 00:03:03,338 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:03:03,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:03:03,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1393353835, now seen corresponding path program 3 times [2023-08-30 00:03:03,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:03:03,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898125759] [2023-08-30 00:03:03,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:03:03,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:03:03,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:03:03,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:03,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:03:03,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898125759] [2023-08-30 00:03:03,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898125759] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:03:03,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106308497] [2023-08-30 00:03:03,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:03:03,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:03:03,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:03:03,452 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:03:03,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 00:03:03,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 00:03:03,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:03:03,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 00:03:03,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:03:03,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:03,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:03:03,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:03,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106308497] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:03:03,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:03:03,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-30 00:03:03,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746875263] [2023-08-30 00:03:03,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:03:03,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:03:03,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:03:03,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:03:03,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:03:03,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-08-30 00:03:03,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 45 transitions, 242 flow. Second operand has 10 states, 10 states have (on average 121.1) internal successors, (1211), 10 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:03,702 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:03:03,702 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-08-30 00:03:03,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:03:04,863 INFO L130 PetriNetUnfolder]: 8827/11997 cut-off events. [2023-08-30 00:03:04,863 INFO L131 PetriNetUnfolder]: For 30624/32500 co-relation queries the response was YES. [2023-08-30 00:03:04,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42694 conditions, 11997 events. 8827/11997 cut-off events. For 30624/32500 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 66009 event pairs, 1277 based on Foata normal form. 1998/13734 useless extension candidates. Maximal degree in co-relation 42677. Up to 4818 conditions per place. [2023-08-30 00:03:04,945 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 162 selfloop transitions, 14 changer transitions 0/180 dead transitions. [2023-08-30 00:03:04,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 180 transitions, 1220 flow [2023-08-30 00:03:04,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 00:03:04,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 00:03:04,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1067 transitions. [2023-08-30 00:03:04,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49034926470588236 [2023-08-30 00:03:04,949 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1067 transitions. [2023-08-30 00:03:04,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1067 transitions. [2023-08-30 00:03:04,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:03:04,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1067 transitions. [2023-08-30 00:03:04,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 133.375) internal successors, (1067), 8 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:04,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 272.0) internal successors, (2448), 9 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:04,955 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 272.0) internal successors, (2448), 9 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:04,956 INFO L175 Difference]: Start difference. First operand has 66 places, 45 transitions, 242 flow. Second operand 8 states and 1067 transitions. [2023-08-30 00:03:04,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 180 transitions, 1220 flow [2023-08-30 00:03:04,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 180 transitions, 1204 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-08-30 00:03:04,977 INFO L231 Difference]: Finished difference. Result has 76 places, 53 transitions, 352 flow [2023-08-30 00:03:04,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=352, PETRI_PLACES=76, PETRI_TRANSITIONS=53} [2023-08-30 00:03:04,978 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 21 predicate places. [2023-08-30 00:03:04,978 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 53 transitions, 352 flow [2023-08-30 00:03:04,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 121.1) internal successors, (1211), 10 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:04,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:03:04,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:03:04,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-30 00:03:05,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:03:05,186 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:03:05,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:03:05,186 INFO L85 PathProgramCache]: Analyzing trace with hash 97335621, now seen corresponding path program 3 times [2023-08-30 00:03:05,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:03:05,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981618816] [2023-08-30 00:03:05,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:03:05,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:03:05,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:03:05,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:05,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:03:05,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981618816] [2023-08-30 00:03:05,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981618816] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:03:05,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294905358] [2023-08-30 00:03:05,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:03:05,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:03:05,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:03:05,257 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:03:05,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 00:03:05,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 00:03:05,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:03:05,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 00:03:05,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:03:05,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:05,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:03:05,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:05,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294905358] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:03:05,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:03:05,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-30 00:03:05,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57016326] [2023-08-30 00:03:05,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:03:05,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:03:05,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:03:05,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:03:05,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:03:05,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-08-30 00:03:05,452 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 53 transitions, 352 flow. Second operand has 10 states, 10 states have (on average 120.5) internal successors, (1205), 10 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:05,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:03:05,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-08-30 00:03:05,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:03:07,200 INFO L130 PetriNetUnfolder]: 13654/18446 cut-off events. [2023-08-30 00:03:07,200 INFO L131 PetriNetUnfolder]: For 63489/68123 co-relation queries the response was YES. [2023-08-30 00:03:07,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71449 conditions, 18446 events. 13654/18446 cut-off events. For 63489/68123 co-relation queries the response was YES. Maximal size of possible extension queue 985. Compared 103635 event pairs, 1256 based on Foata normal form. 2378/20468 useless extension candidates. Maximal degree in co-relation 71428. Up to 7661 conditions per place. [2023-08-30 00:03:07,443 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 195 selfloop transitions, 14 changer transitions 0/214 dead transitions. [2023-08-30 00:03:07,443 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 214 transitions, 1795 flow [2023-08-30 00:03:07,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 00:03:07,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 00:03:07,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1061 transitions. [2023-08-30 00:03:07,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875919117647059 [2023-08-30 00:03:07,448 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1061 transitions. [2023-08-30 00:03:07,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1061 transitions. [2023-08-30 00:03:07,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:03:07,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1061 transitions. [2023-08-30 00:03:07,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 132.625) internal successors, (1061), 8 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:07,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 272.0) internal successors, (2448), 9 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:07,456 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 272.0) internal successors, (2448), 9 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:07,457 INFO L175 Difference]: Start difference. First operand has 76 places, 53 transitions, 352 flow. Second operand 8 states and 1061 transitions. [2023-08-30 00:03:07,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 214 transitions, 1795 flow [2023-08-30 00:03:07,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 214 transitions, 1675 flow, removed 24 selfloop flow, removed 4 redundant places. [2023-08-30 00:03:07,662 INFO L231 Difference]: Finished difference. Result has 83 places, 61 transitions, 438 flow [2023-08-30 00:03:07,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=438, PETRI_PLACES=83, PETRI_TRANSITIONS=61} [2023-08-30 00:03:07,662 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 28 predicate places. [2023-08-30 00:03:07,662 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 61 transitions, 438 flow [2023-08-30 00:03:07,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 120.5) internal successors, (1205), 10 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:07,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:03:07,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:03:07,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 00:03:07,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 00:03:07,867 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:03:07,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:03:07,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1620542779, now seen corresponding path program 4 times [2023-08-30 00:03:07,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:03:07,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488111476] [2023-08-30 00:03:07,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:03:07,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:03:07,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:03:08,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:08,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:03:08,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488111476] [2023-08-30 00:03:08,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488111476] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:03:08,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503749247] [2023-08-30 00:03:08,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:03:08,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:03:08,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:03:08,018 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:03:08,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 00:03:08,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:03:08,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:03:08,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 00:03:08,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:03:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:08,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:03:08,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:08,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503749247] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:03:08,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:03:08,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-30 00:03:08,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30680315] [2023-08-30 00:03:08,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:03:08,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:03:08,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:03:08,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:03:08,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:03:08,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-08-30 00:03:08,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 61 transitions, 438 flow. Second operand has 10 states, 10 states have (on average 120.7) internal successors, (1207), 10 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:08,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:03:08,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-08-30 00:03:08,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:03:09,688 INFO L130 PetriNetUnfolder]: 13244/17949 cut-off events. [2023-08-30 00:03:09,688 INFO L131 PetriNetUnfolder]: For 76286/80676 co-relation queries the response was YES. [2023-08-30 00:03:09,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74000 conditions, 17949 events. 13244/17949 cut-off events. For 76286/80676 co-relation queries the response was YES. Maximal size of possible extension queue 1082. Compared 100990 event pairs, 3032 based on Foata normal form. 2130/19585 useless extension candidates. Maximal degree in co-relation 73975. Up to 7964 conditions per place. [2023-08-30 00:03:09,866 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 129 selfloop transitions, 17 changer transitions 0/151 dead transitions. [2023-08-30 00:03:09,867 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 151 transitions, 1310 flow [2023-08-30 00:03:09,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:03:09,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:03:09,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 670 transitions. [2023-08-30 00:03:09,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49264705882352944 [2023-08-30 00:03:09,870 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 670 transitions. [2023-08-30 00:03:09,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 670 transitions. [2023-08-30 00:03:09,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:03:09,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 670 transitions. [2023-08-30 00:03:09,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.0) internal successors, (670), 5 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:09,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:09,875 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:09,875 INFO L175 Difference]: Start difference. First operand has 83 places, 61 transitions, 438 flow. Second operand 5 states and 670 transitions. [2023-08-30 00:03:09,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 151 transitions, 1310 flow [2023-08-30 00:03:09,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 151 transitions, 1232 flow, removed 15 selfloop flow, removed 4 redundant places. [2023-08-30 00:03:09,980 INFO L231 Difference]: Finished difference. Result has 86 places, 67 transitions, 528 flow [2023-08-30 00:03:09,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=528, PETRI_PLACES=86, PETRI_TRANSITIONS=67} [2023-08-30 00:03:09,980 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 31 predicate places. [2023-08-30 00:03:09,980 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 67 transitions, 528 flow [2023-08-30 00:03:09,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 120.7) internal successors, (1207), 10 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:09,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:03:09,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:03:09,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 00:03:10,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 00:03:10,187 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:03:10,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:03:10,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1130502097, now seen corresponding path program 4 times [2023-08-30 00:03:10,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:03:10,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237519865] [2023-08-30 00:03:10,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:03:10,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:03:10,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:03:10,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:10,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:03:10,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237519865] [2023-08-30 00:03:10,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237519865] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:03:10,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120673217] [2023-08-30 00:03:10,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:03:10,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:03:10,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:03:10,286 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:03:10,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 00:03:10,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:03:10,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:03:10,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 00:03:10,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:03:10,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:10,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:03:10,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:10,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120673217] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:03:10,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:03:10,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-30 00:03:10,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883294811] [2023-08-30 00:03:10,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:03:10,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:03:10,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:03:10,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:03:10,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:03:10,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-08-30 00:03:10,482 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 67 transitions, 528 flow. Second operand has 10 states, 10 states have (on average 120.5) internal successors, (1205), 10 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:10,482 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:03:10,482 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-08-30 00:03:10,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:03:12,033 INFO L130 PetriNetUnfolder]: 12879/17695 cut-off events. [2023-08-30 00:03:12,033 INFO L131 PetriNetUnfolder]: For 73467/77835 co-relation queries the response was YES. [2023-08-30 00:03:12,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74803 conditions, 17695 events. 12879/17695 cut-off events. For 73467/77835 co-relation queries the response was YES. Maximal size of possible extension queue 979. Compared 100026 event pairs, 3258 based on Foata normal form. 2208/19585 useless extension candidates. Maximal degree in co-relation 74775. Up to 8766 conditions per place. [2023-08-30 00:03:12,219 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 138 selfloop transitions, 17 changer transitions 0/161 dead transitions. [2023-08-30 00:03:12,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 161 transitions, 1553 flow [2023-08-30 00:03:12,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:03:12,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:03:12,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 664 transitions. [2023-08-30 00:03:12,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48823529411764705 [2023-08-30 00:03:12,223 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 664 transitions. [2023-08-30 00:03:12,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 664 transitions. [2023-08-30 00:03:12,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:03:12,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 664 transitions. [2023-08-30 00:03:12,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 132.8) internal successors, (664), 5 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:12,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:12,228 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:12,228 INFO L175 Difference]: Start difference. First operand has 86 places, 67 transitions, 528 flow. Second operand 5 states and 664 transitions. [2023-08-30 00:03:12,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 161 transitions, 1553 flow [2023-08-30 00:03:12,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 161 transitions, 1466 flow, removed 25 selfloop flow, removed 1 redundant places. [2023-08-30 00:03:12,397 INFO L231 Difference]: Finished difference. Result has 92 places, 73 transitions, 619 flow [2023-08-30 00:03:12,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=619, PETRI_PLACES=92, PETRI_TRANSITIONS=73} [2023-08-30 00:03:12,397 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 37 predicate places. [2023-08-30 00:03:12,398 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 73 transitions, 619 flow [2023-08-30 00:03:12,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 120.5) internal successors, (1205), 10 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:12,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:03:12,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:03:12,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 00:03:12,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 00:03:12,605 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:03:12,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:03:12,606 INFO L85 PathProgramCache]: Analyzing trace with hash 2056442747, now seen corresponding path program 5 times [2023-08-30 00:03:12,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:03:12,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378354670] [2023-08-30 00:03:12,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:03:12,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:03:12,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:03:12,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:12,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:03:12,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378354670] [2023-08-30 00:03:12,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378354670] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:03:12,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:03:12,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 00:03:12,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992860942] [2023-08-30 00:03:12,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:03:12,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:03:12,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:03:12,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:03:12,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:03:12,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 272 [2023-08-30 00:03:12,712 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 73 transitions, 619 flow. Second operand has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:12,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:03:12,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 272 [2023-08-30 00:03:12,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:03:14,349 INFO L130 PetriNetUnfolder]: 11934/16360 cut-off events. [2023-08-30 00:03:14,349 INFO L131 PetriNetUnfolder]: For 83443/87431 co-relation queries the response was YES. [2023-08-30 00:03:14,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71623 conditions, 16360 events. 11934/16360 cut-off events. For 83443/87431 co-relation queries the response was YES. Maximal size of possible extension queue 987. Compared 92987 event pairs, 2718 based on Foata normal form. 1860/17813 useless extension candidates. Maximal degree in co-relation 71592. Up to 9074 conditions per place. [2023-08-30 00:03:14,486 INFO L137 encePairwiseOnDemand]: 266/272 looper letters, 179 selfloop transitions, 16 changer transitions 0/201 dead transitions. [2023-08-30 00:03:14,486 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 201 transitions, 1989 flow [2023-08-30 00:03:14,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:03:14,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:03:14,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 803 transitions. [2023-08-30 00:03:14,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49203431372549017 [2023-08-30 00:03:14,490 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 803 transitions. [2023-08-30 00:03:14,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 803 transitions. [2023-08-30 00:03:14,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:03:14,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 803 transitions. [2023-08-30 00:03:14,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 133.83333333333334) internal successors, (803), 6 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:14,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 272.0) internal successors, (1904), 7 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:14,494 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 272.0) internal successors, (1904), 7 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:14,495 INFO L175 Difference]: Start difference. First operand has 92 places, 73 transitions, 619 flow. Second operand 6 states and 803 transitions. [2023-08-30 00:03:14,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 201 transitions, 1989 flow [2023-08-30 00:03:14,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 201 transitions, 1876 flow, removed 33 selfloop flow, removed 1 redundant places. [2023-08-30 00:03:14,631 INFO L231 Difference]: Finished difference. Result has 98 places, 77 transitions, 674 flow [2023-08-30 00:03:14,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=674, PETRI_PLACES=98, PETRI_TRANSITIONS=77} [2023-08-30 00:03:14,631 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 43 predicate places. [2023-08-30 00:03:14,631 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 77 transitions, 674 flow [2023-08-30 00:03:14,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:14,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:03:14,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:03:14,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 00:03:14,632 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:03:14,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:03:14,632 INFO L85 PathProgramCache]: Analyzing trace with hash 962061305, now seen corresponding path program 1 times [2023-08-30 00:03:14,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:03:14,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891414270] [2023-08-30 00:03:14,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:03:14,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:03:14,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:03:14,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:14,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:03:14,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891414270] [2023-08-30 00:03:14,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891414270] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:03:14,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179055984] [2023-08-30 00:03:14,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:03:14,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:03:14,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:03:14,697 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:03:14,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 00:03:14,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:03:14,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 00:03:14,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:03:14,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:14,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:03:14,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:14,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179055984] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:03:14,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:03:14,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-30 00:03:14,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579165335] [2023-08-30 00:03:14,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:03:14,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:03:14,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:03:14,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:03:14,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:03:14,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-08-30 00:03:14,887 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 77 transitions, 674 flow. Second operand has 8 states, 8 states have (on average 121.375) internal successors, (971), 8 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:14,887 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:03:14,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-08-30 00:03:14,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:03:16,805 INFO L130 PetriNetUnfolder]: 12571/17111 cut-off events. [2023-08-30 00:03:16,806 INFO L131 PetriNetUnfolder]: For 84743/89371 co-relation queries the response was YES. [2023-08-30 00:03:16,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76924 conditions, 17111 events. 12571/17111 cut-off events. For 84743/89371 co-relation queries the response was YES. Maximal size of possible extension queue 1064. Compared 96979 event pairs, 1276 based on Foata normal form. 2178/18934 useless extension candidates. Maximal degree in co-relation 76891. Up to 8878 conditions per place. [2023-08-30 00:03:16,981 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 141 selfloop transitions, 16 changer transitions 0/163 dead transitions. [2023-08-30 00:03:16,981 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 163 transitions, 1624 flow [2023-08-30 00:03:16,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:03:16,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:03:16,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 657 transitions. [2023-08-30 00:03:16,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48308823529411765 [2023-08-30 00:03:16,984 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 657 transitions. [2023-08-30 00:03:16,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 657 transitions. [2023-08-30 00:03:16,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:03:16,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 657 transitions. [2023-08-30 00:03:16,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 131.4) internal successors, (657), 5 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:16,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:16,988 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:16,988 INFO L175 Difference]: Start difference. First operand has 98 places, 77 transitions, 674 flow. Second operand 5 states and 657 transitions. [2023-08-30 00:03:16,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 163 transitions, 1624 flow [2023-08-30 00:03:17,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 163 transitions, 1568 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-08-30 00:03:17,136 INFO L231 Difference]: Finished difference. Result has 101 places, 79 transitions, 700 flow [2023-08-30 00:03:17,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=700, PETRI_PLACES=101, PETRI_TRANSITIONS=79} [2023-08-30 00:03:17,137 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 46 predicate places. [2023-08-30 00:03:17,137 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 79 transitions, 700 flow [2023-08-30 00:03:17,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 121.375) internal successors, (971), 8 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:17,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:03:17,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:03:17,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-30 00:03:17,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:03:17,338 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:03:17,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:03:17,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1080256256, now seen corresponding path program 1 times [2023-08-30 00:03:17,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:03:17,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432170751] [2023-08-30 00:03:17,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:03:17,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:03:17,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:03:17,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:17,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:03:17,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432170751] [2023-08-30 00:03:17,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432170751] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:03:17,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:03:17,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 00:03:17,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572885614] [2023-08-30 00:03:17,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:03:17,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:03:17,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:03:17,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:03:17,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:03:17,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 272 [2023-08-30 00:03:17,436 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 79 transitions, 700 flow. Second operand has 5 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:17,436 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:03:17,436 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 272 [2023-08-30 00:03:17,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:03:19,406 INFO L130 PetriNetUnfolder]: 13307/18167 cut-off events. [2023-08-30 00:03:19,406 INFO L131 PetriNetUnfolder]: For 99103/105226 co-relation queries the response was YES. [2023-08-30 00:03:19,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83406 conditions, 18167 events. 13307/18167 cut-off events. For 99103/105226 co-relation queries the response was YES. Maximal size of possible extension queue 1006. Compared 102343 event pairs, 1302 based on Foata normal form. 3136/21050 useless extension candidates. Maximal degree in co-relation 83371. Up to 8763 conditions per place. [2023-08-30 00:03:19,564 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 150 selfloop transitions, 15 changer transitions 0/173 dead transitions. [2023-08-30 00:03:19,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 173 transitions, 1825 flow [2023-08-30 00:03:19,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:03:19,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:03:19,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 665 transitions. [2023-08-30 00:03:19,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4889705882352941 [2023-08-30 00:03:19,567 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 665 transitions. [2023-08-30 00:03:19,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 665 transitions. [2023-08-30 00:03:19,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:03:19,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 665 transitions. [2023-08-30 00:03:19,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:19,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:19,572 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:19,572 INFO L175 Difference]: Start difference. First operand has 101 places, 79 transitions, 700 flow. Second operand 5 states and 665 transitions. [2023-08-30 00:03:19,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 173 transitions, 1825 flow [2023-08-30 00:03:19,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 173 transitions, 1771 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-30 00:03:19,768 INFO L231 Difference]: Finished difference. Result has 105 places, 81 transitions, 746 flow [2023-08-30 00:03:19,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=746, PETRI_PLACES=105, PETRI_TRANSITIONS=81} [2023-08-30 00:03:19,769 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 50 predicate places. [2023-08-30 00:03:19,769 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 81 transitions, 746 flow [2023-08-30 00:03:19,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:19,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:03:19,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:03:19,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-30 00:03:19,770 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:03:19,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:03:19,770 INFO L85 PathProgramCache]: Analyzing trace with hash -337942745, now seen corresponding path program 2 times [2023-08-30 00:03:19,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:03:19,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315569823] [2023-08-30 00:03:19,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:03:19,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:03:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:03:19,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:19,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:03:19,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315569823] [2023-08-30 00:03:19,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315569823] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:03:19,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:03:19,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 00:03:19,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850366944] [2023-08-30 00:03:19,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:03:19,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:03:19,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:03:19,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:03:19,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:03:19,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 272 [2023-08-30 00:03:19,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 81 transitions, 746 flow. Second operand has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:19,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:03:19,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 272 [2023-08-30 00:03:19,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:03:21,572 INFO L130 PetriNetUnfolder]: 13076/17848 cut-off events. [2023-08-30 00:03:21,572 INFO L131 PetriNetUnfolder]: For 117216/122833 co-relation queries the response was YES. [2023-08-30 00:03:21,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85583 conditions, 17848 events. 13076/17848 cut-off events. For 117216/122833 co-relation queries the response was YES. Maximal size of possible extension queue 1120. Compared 100475 event pairs, 4262 based on Foata normal form. 2311/19669 useless extension candidates. Maximal degree in co-relation 85546. Up to 9470 conditions per place. [2023-08-30 00:03:21,806 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 153 selfloop transitions, 16 changer transitions 0/176 dead transitions. [2023-08-30 00:03:21,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 176 transitions, 1850 flow [2023-08-30 00:03:21,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:03:21,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:03:21,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 671 transitions. [2023-08-30 00:03:21,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4933823529411765 [2023-08-30 00:03:21,809 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 671 transitions. [2023-08-30 00:03:21,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 671 transitions. [2023-08-30 00:03:21,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:03:21,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 671 transitions. [2023-08-30 00:03:21,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.2) internal successors, (671), 5 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:21,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:21,813 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:21,814 INFO L175 Difference]: Start difference. First operand has 105 places, 81 transitions, 746 flow. Second operand 5 states and 671 transitions. [2023-08-30 00:03:21,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 176 transitions, 1850 flow [2023-08-30 00:03:22,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 176 transitions, 1790 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-08-30 00:03:22,218 INFO L231 Difference]: Finished difference. Result has 108 places, 82 transitions, 771 flow [2023-08-30 00:03:22,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=771, PETRI_PLACES=108, PETRI_TRANSITIONS=82} [2023-08-30 00:03:22,218 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 53 predicate places. [2023-08-30 00:03:22,218 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 82 transitions, 771 flow [2023-08-30 00:03:22,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:22,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:03:22,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:03:22,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-30 00:03:22,220 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:03:22,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:03:22,220 INFO L85 PathProgramCache]: Analyzing trace with hash -310657047, now seen corresponding path program 5 times [2023-08-30 00:03:22,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:03:22,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224994428] [2023-08-30 00:03:22,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:03:22,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:03:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:03:22,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:22,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:03:22,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224994428] [2023-08-30 00:03:22,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224994428] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:03:22,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:03:22,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 00:03:22,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316173585] [2023-08-30 00:03:22,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:03:22,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:03:22,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:03:22,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:03:22,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:03:22,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 272 [2023-08-30 00:03:22,301 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 82 transitions, 771 flow. Second operand has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:22,301 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:03:22,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 272 [2023-08-30 00:03:22,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:03:24,142 INFO L130 PetriNetUnfolder]: 13240/18025 cut-off events. [2023-08-30 00:03:24,142 INFO L131 PetriNetUnfolder]: For 107966/113800 co-relation queries the response was YES. [2023-08-30 00:03:24,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87781 conditions, 18025 events. 13240/18025 cut-off events. For 107966/113800 co-relation queries the response was YES. Maximal size of possible extension queue 1007. Compared 101564 event pairs, 3579 based on Foata normal form. 3087/20892 useless extension candidates. Maximal degree in co-relation 87743. Up to 10187 conditions per place. [2023-08-30 00:03:24,374 INFO L137 encePairwiseOnDemand]: 266/272 looper letters, 198 selfloop transitions, 18 changer transitions 2/226 dead transitions. [2023-08-30 00:03:24,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 226 transitions, 2455 flow [2023-08-30 00:03:24,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:03:24,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:03:24,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 799 transitions. [2023-08-30 00:03:24,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4895833333333333 [2023-08-30 00:03:24,379 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 799 transitions. [2023-08-30 00:03:24,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 799 transitions. [2023-08-30 00:03:24,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:03:24,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 799 transitions. [2023-08-30 00:03:24,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 133.16666666666666) internal successors, (799), 6 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:24,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 272.0) internal successors, (1904), 7 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:24,385 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 272.0) internal successors, (1904), 7 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:24,385 INFO L175 Difference]: Start difference. First operand has 108 places, 82 transitions, 771 flow. Second operand 6 states and 799 transitions. [2023-08-30 00:03:24,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 226 transitions, 2455 flow [2023-08-30 00:03:24,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 226 transitions, 2377 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-08-30 00:03:24,583 INFO L231 Difference]: Finished difference. Result has 113 places, 86 transitions, 841 flow [2023-08-30 00:03:24,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=749, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=841, PETRI_PLACES=113, PETRI_TRANSITIONS=86} [2023-08-30 00:03:24,584 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 58 predicate places. [2023-08-30 00:03:24,584 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 86 transitions, 841 flow [2023-08-30 00:03:24,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:24,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:03:24,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:03:24,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-30 00:03:24,589 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:03:24,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:03:24,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1902105510, now seen corresponding path program 2 times [2023-08-30 00:03:24,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:03:24,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24806280] [2023-08-30 00:03:24,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:03:24,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:03:24,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:03:24,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:24,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:03:24,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24806280] [2023-08-30 00:03:24,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24806280] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:03:24,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212596139] [2023-08-30 00:03:24,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:03:24,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:03:24,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:03:24,655 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:03:24,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 00:03:24,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:03:24,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:03:24,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 00:03:24,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:03:24,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:24,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:03:24,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:24,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212596139] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:03:24,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:03:24,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-30 00:03:24,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420006655] [2023-08-30 00:03:24,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:03:24,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:03:24,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:03:24,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:03:24,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:03:24,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-08-30 00:03:24,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 86 transitions, 841 flow. Second operand has 10 states, 10 states have (on average 120.3) internal successors, (1203), 10 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:24,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:03:24,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-08-30 00:03:24,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:03:26,901 INFO L130 PetriNetUnfolder]: 13852/18860 cut-off events. [2023-08-30 00:03:26,902 INFO L131 PetriNetUnfolder]: For 127015/133024 co-relation queries the response was YES. [2023-08-30 00:03:27,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97917 conditions, 18860 events. 13852/18860 cut-off events. For 127015/133024 co-relation queries the response was YES. Maximal size of possible extension queue 1068. Compared 105202 event pairs, 3847 based on Foata normal form. 3068/21698 useless extension candidates. Maximal degree in co-relation 97877. Up to 10375 conditions per place. [2023-08-30 00:03:27,159 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 165 selfloop transitions, 16 changer transitions 0/189 dead transitions. [2023-08-30 00:03:27,159 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 189 transitions, 2054 flow [2023-08-30 00:03:27,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:03:27,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:03:27,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 662 transitions. [2023-08-30 00:03:27,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48676470588235293 [2023-08-30 00:03:27,161 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 662 transitions. [2023-08-30 00:03:27,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 662 transitions. [2023-08-30 00:03:27,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:03:27,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 662 transitions. [2023-08-30 00:03:27,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:27,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:27,165 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:27,165 INFO L175 Difference]: Start difference. First operand has 113 places, 86 transitions, 841 flow. Second operand 5 states and 662 transitions. [2023-08-30 00:03:27,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 189 transitions, 2054 flow [2023-08-30 00:03:27,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 189 transitions, 1998 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-08-30 00:03:27,502 INFO L231 Difference]: Finished difference. Result has 115 places, 87 transitions, 838 flow [2023-08-30 00:03:27,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=789, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=838, PETRI_PLACES=115, PETRI_TRANSITIONS=87} [2023-08-30 00:03:27,503 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 60 predicate places. [2023-08-30 00:03:27,503 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 87 transitions, 838 flow [2023-08-30 00:03:27,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 120.3) internal successors, (1203), 10 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:27,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:03:27,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:03:27,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 00:03:27,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-30 00:03:27,705 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:03:27,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:03:27,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1172883442, now seen corresponding path program 3 times [2023-08-30 00:03:27,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:03:27,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405537891] [2023-08-30 00:03:27,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:03:27,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:03:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:03:27,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:27,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:03:27,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405537891] [2023-08-30 00:03:27,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405537891] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:03:27,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:03:27,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 00:03:27,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974473128] [2023-08-30 00:03:27,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:03:27,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:03:27,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:03:27,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:03:27,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:03:27,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 272 [2023-08-30 00:03:27,820 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 87 transitions, 838 flow. Second operand has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:27,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:03:27,820 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 272 [2023-08-30 00:03:27,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:03:29,723 INFO L130 PetriNetUnfolder]: 13170/17913 cut-off events. [2023-08-30 00:03:29,723 INFO L131 PetriNetUnfolder]: For 119316/125003 co-relation queries the response was YES. [2023-08-30 00:03:29,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92333 conditions, 17913 events. 13170/17913 cut-off events. For 119316/125003 co-relation queries the response was YES. Maximal size of possible extension queue 1010. Compared 99280 event pairs, 3661 based on Foata normal form. 3035/20701 useless extension candidates. Maximal degree in co-relation 92292. Up to 10316 conditions per place. [2023-08-30 00:03:29,939 INFO L137 encePairwiseOnDemand]: 266/272 looper letters, 181 selfloop transitions, 22 changer transitions 4/215 dead transitions. [2023-08-30 00:03:29,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 215 transitions, 2328 flow [2023-08-30 00:03:29,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:03:29,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:03:29,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 794 transitions. [2023-08-30 00:03:29,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48651960784313725 [2023-08-30 00:03:29,941 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 794 transitions. [2023-08-30 00:03:29,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 794 transitions. [2023-08-30 00:03:29,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:03:29,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 794 transitions. [2023-08-30 00:03:29,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 132.33333333333334) internal successors, (794), 6 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:29,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 272.0) internal successors, (1904), 7 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:29,944 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 272.0) internal successors, (1904), 7 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:29,944 INFO L175 Difference]: Start difference. First operand has 115 places, 87 transitions, 838 flow. Second operand 6 states and 794 transitions. [2023-08-30 00:03:29,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 215 transitions, 2328 flow [2023-08-30 00:03:30,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 215 transitions, 2300 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-30 00:03:30,361 INFO L231 Difference]: Finished difference. Result has 119 places, 90 transitions, 906 flow [2023-08-30 00:03:30,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=906, PETRI_PLACES=119, PETRI_TRANSITIONS=90} [2023-08-30 00:03:30,362 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 64 predicate places. [2023-08-30 00:03:30,362 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 90 transitions, 906 flow [2023-08-30 00:03:30,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:30,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:03:30,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:03:30,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-30 00:03:30,363 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:03:30,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:03:30,363 INFO L85 PathProgramCache]: Analyzing trace with hash 2063772676, now seen corresponding path program 4 times [2023-08-30 00:03:30,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:03:30,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733207310] [2023-08-30 00:03:30,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:03:30,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:03:30,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:03:30,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:30,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:03:30,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733207310] [2023-08-30 00:03:30,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733207310] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:03:30,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:03:30,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 00:03:30,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787272307] [2023-08-30 00:03:30,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:03:30,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:03:30,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:03:30,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:03:30,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:03:30,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 272 [2023-08-30 00:03:30,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 90 transitions, 906 flow. Second operand has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:30,447 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:03:30,447 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 272 [2023-08-30 00:03:30,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:03:32,289 INFO L130 PetriNetUnfolder]: 12426/16885 cut-off events. [2023-08-30 00:03:32,290 INFO L131 PetriNetUnfolder]: For 112368/117739 co-relation queries the response was YES. [2023-08-30 00:03:32,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88849 conditions, 16885 events. 12426/16885 cut-off events. For 112368/117739 co-relation queries the response was YES. Maximal size of possible extension queue 955. Compared 92925 event pairs, 3035 based on Foata normal form. 2829/19475 useless extension candidates. Maximal degree in co-relation 88807. Up to 8582 conditions per place. [2023-08-30 00:03:32,446 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 160 selfloop transitions, 19 changer transitions 0/187 dead transitions. [2023-08-30 00:03:32,446 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 187 transitions, 2081 flow [2023-08-30 00:03:32,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:03:32,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:03:32,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 663 transitions. [2023-08-30 00:03:32,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2023-08-30 00:03:32,448 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 663 transitions. [2023-08-30 00:03:32,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 663 transitions. [2023-08-30 00:03:32,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:03:32,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 663 transitions. [2023-08-30 00:03:32,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 132.6) internal successors, (663), 5 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:32,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:32,452 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:32,452 INFO L175 Difference]: Start difference. First operand has 119 places, 90 transitions, 906 flow. Second operand 5 states and 663 transitions. [2023-08-30 00:03:32,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 187 transitions, 2081 flow [2023-08-30 00:03:33,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 187 transitions, 2025 flow, removed 15 selfloop flow, removed 4 redundant places. [2023-08-30 00:03:33,185 INFO L231 Difference]: Finished difference. Result has 120 places, 91 transitions, 908 flow [2023-08-30 00:03:33,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=850, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=908, PETRI_PLACES=120, PETRI_TRANSITIONS=91} [2023-08-30 00:03:33,185 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 65 predicate places. [2023-08-30 00:03:33,186 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 91 transitions, 908 flow [2023-08-30 00:03:33,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:33,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:03:33,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:03:33,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-30 00:03:33,186 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:03:33,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:03:33,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1551658481, now seen corresponding path program 3 times [2023-08-30 00:03:33,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:03:33,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412277423] [2023-08-30 00:03:33,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:03:33,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:03:33,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:03:33,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:33,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:03:33,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412277423] [2023-08-30 00:03:33,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412277423] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:03:33,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:03:33,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 00:03:33,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497897106] [2023-08-30 00:03:33,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:03:33,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:03:33,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:03:33,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:03:33,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:03:33,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 272 [2023-08-30 00:03:33,266 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 91 transitions, 908 flow. Second operand has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:33,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:03:33,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 272 [2023-08-30 00:03:33,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:03:34,683 INFO L130 PetriNetUnfolder]: 11084/15095 cut-off events. [2023-08-30 00:03:34,683 INFO L131 PetriNetUnfolder]: For 126197/133058 co-relation queries the response was YES. [2023-08-30 00:03:34,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78692 conditions, 15095 events. 11084/15095 cut-off events. For 126197/133058 co-relation queries the response was YES. Maximal size of possible extension queue 1061. Compared 84219 event pairs, 2467 based on Foata normal form. 2507/17319 useless extension candidates. Maximal degree in co-relation 78650. Up to 7838 conditions per place. [2023-08-30 00:03:34,836 INFO L137 encePairwiseOnDemand]: 266/272 looper letters, 192 selfloop transitions, 22 changer transitions 14/236 dead transitions. [2023-08-30 00:03:34,836 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 236 transitions, 2693 flow [2023-08-30 00:03:34,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:03:34,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:03:34,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 798 transitions. [2023-08-30 00:03:34,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4889705882352941 [2023-08-30 00:03:34,838 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 798 transitions. [2023-08-30 00:03:34,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 798 transitions. [2023-08-30 00:03:34,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:03:34,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 798 transitions. [2023-08-30 00:03:34,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 133.0) internal successors, (798), 6 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:34,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 272.0) internal successors, (1904), 7 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:34,842 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 272.0) internal successors, (1904), 7 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:34,842 INFO L175 Difference]: Start difference. First operand has 120 places, 91 transitions, 908 flow. Second operand 6 states and 798 transitions. [2023-08-30 00:03:34,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 236 transitions, 2693 flow [2023-08-30 00:03:35,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 236 transitions, 2567 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-08-30 00:03:35,085 INFO L231 Difference]: Finished difference. Result has 123 places, 94 transitions, 961 flow [2023-08-30 00:03:35,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=961, PETRI_PLACES=123, PETRI_TRANSITIONS=94} [2023-08-30 00:03:35,085 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 68 predicate places. [2023-08-30 00:03:35,085 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 94 transitions, 961 flow [2023-08-30 00:03:35,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:35,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:03:35,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:03:35,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-30 00:03:35,086 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:03:35,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:03:35,087 INFO L85 PathProgramCache]: Analyzing trace with hash 65376171, now seen corresponding path program 4 times [2023-08-30 00:03:35,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:03:35,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389238817] [2023-08-30 00:03:35,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:03:35,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:03:35,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:03:35,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:35,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:03:35,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389238817] [2023-08-30 00:03:35,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389238817] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:03:35,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:03:35,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 00:03:35,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915899502] [2023-08-30 00:03:35,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:03:35,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:03:35,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:03:35,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:03:35,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:03:35,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 272 [2023-08-30 00:03:35,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 94 transitions, 961 flow. Second operand has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:35,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:03:35,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 272 [2023-08-30 00:03:35,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:03:36,617 INFO L130 PetriNetUnfolder]: 10222/13921 cut-off events. [2023-08-30 00:03:36,617 INFO L131 PetriNetUnfolder]: For 115976/122508 co-relation queries the response was YES. [2023-08-30 00:03:36,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74098 conditions, 13921 events. 10222/13921 cut-off events. For 115976/122508 co-relation queries the response was YES. Maximal size of possible extension queue 1002. Compared 76684 event pairs, 2127 based on Foata normal form. 2256/15986 useless extension candidates. Maximal degree in co-relation 74055. Up to 6158 conditions per place. [2023-08-30 00:03:36,743 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 179 selfloop transitions, 19 changer transitions 0/206 dead transitions. [2023-08-30 00:03:36,743 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 206 transitions, 2319 flow [2023-08-30 00:03:36,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:03:36,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:03:36,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 667 transitions. [2023-08-30 00:03:36,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4904411764705882 [2023-08-30 00:03:36,745 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 667 transitions. [2023-08-30 00:03:36,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 667 transitions. [2023-08-30 00:03:36,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:03:36,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 667 transitions. [2023-08-30 00:03:36,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 133.4) internal successors, (667), 5 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:36,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:36,749 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:36,749 INFO L175 Difference]: Start difference. First operand has 123 places, 94 transitions, 961 flow. Second operand 5 states and 667 transitions. [2023-08-30 00:03:36,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 206 transitions, 2319 flow [2023-08-30 00:03:37,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 206 transitions, 2263 flow, removed 15 selfloop flow, removed 4 redundant places. [2023-08-30 00:03:37,096 INFO L231 Difference]: Finished difference. Result has 124 places, 95 transitions, 963 flow [2023-08-30 00:03:37,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=905, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=963, PETRI_PLACES=124, PETRI_TRANSITIONS=95} [2023-08-30 00:03:37,096 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 69 predicate places. [2023-08-30 00:03:37,097 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 95 transitions, 963 flow [2023-08-30 00:03:37,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:37,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:03:37,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:03:37,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-30 00:03:37,098 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:03:37,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:03:37,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1336498222, now seen corresponding path program 1 times [2023-08-30 00:03:37,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:03:37,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976636035] [2023-08-30 00:03:37,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:03:37,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:03:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:03:37,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:03:37,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:03:37,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976636035] [2023-08-30 00:03:37,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976636035] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:03:37,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:03:37,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:03:37,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691694898] [2023-08-30 00:03:37,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:03:37,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:03:37,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:03:37,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:03:37,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:03:37,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 272 [2023-08-30 00:03:37,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 95 transitions, 963 flow. Second operand has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:37,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:03:37,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 272 [2023-08-30 00:03:37,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:03:38,104 INFO L130 PetriNetUnfolder]: 5924/8258 cut-off events. [2023-08-30 00:03:38,104 INFO L131 PetriNetUnfolder]: For 79346/86476 co-relation queries the response was YES. [2023-08-30 00:03:38,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42697 conditions, 8258 events. 5924/8258 cut-off events. For 79346/86476 co-relation queries the response was YES. Maximal size of possible extension queue 730. Compared 46570 event pairs, 1960 based on Foata normal form. 2906/10953 useless extension candidates. Maximal degree in co-relation 42654. Up to 5607 conditions per place. [2023-08-30 00:03:38,162 INFO L137 encePairwiseOnDemand]: 269/272 looper letters, 81 selfloop transitions, 10 changer transitions 17/122 dead transitions. [2023-08-30 00:03:38,163 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 122 transitions, 1316 flow [2023-08-30 00:03:38,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:03:38,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:03:38,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 425 transitions. [2023-08-30 00:03:38,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2023-08-30 00:03:38,164 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 425 transitions. [2023-08-30 00:03:38,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 425 transitions. [2023-08-30 00:03:38,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:03:38,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 425 transitions. [2023-08-30 00:03:38,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:38,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:38,166 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:38,166 INFO L175 Difference]: Start difference. First operand has 124 places, 95 transitions, 963 flow. Second operand 3 states and 425 transitions. [2023-08-30 00:03:38,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 122 transitions, 1316 flow [2023-08-30 00:03:38,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 122 transitions, 1277 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 00:03:38,280 INFO L231 Difference]: Finished difference. Result has 124 places, 83 transitions, 839 flow [2023-08-30 00:03:38,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=839, PETRI_PLACES=124, PETRI_TRANSITIONS=83} [2023-08-30 00:03:38,281 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 69 predicate places. [2023-08-30 00:03:38,281 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 83 transitions, 839 flow [2023-08-30 00:03:38,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:38,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:03:38,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:03:38,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-30 00:03:38,282 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:03:38,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:03:38,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1701116707, now seen corresponding path program 1 times [2023-08-30 00:03:38,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:03:38,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82379590] [2023-08-30 00:03:38,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:03:38,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:03:38,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:03:38,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:38,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:03:38,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82379590] [2023-08-30 00:03:38,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82379590] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:03:38,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774169129] [2023-08-30 00:03:38,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:03:38,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:03:38,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:03:38,471 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:03:38,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 00:03:38,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:03:38,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 00:03:38,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:03:38,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:38,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:03:38,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:03:38,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774169129] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:03:38,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:03:38,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2023-08-30 00:03:38,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701191167] [2023-08-30 00:03:38,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:03:38,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 00:03:38,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:03:38,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 00:03:38,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-30 00:03:38,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 272 [2023-08-30 00:03:38,808 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 83 transitions, 839 flow. Second operand has 7 states, 7 states have (on average 131.71428571428572) internal successors, (922), 7 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:38,808 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:03:38,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 272 [2023-08-30 00:03:38,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:03:40,217 INFO L130 PetriNetUnfolder]: 10954/14997 cut-off events. [2023-08-30 00:03:40,217 INFO L131 PetriNetUnfolder]: For 112708/122845 co-relation queries the response was YES. [2023-08-30 00:03:40,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72006 conditions, 14997 events. 10954/14997 cut-off events. For 112708/122845 co-relation queries the response was YES. Maximal size of possible extension queue 877. Compared 82588 event pairs, 995 based on Foata normal form. 4322/19188 useless extension candidates. Maximal degree in co-relation 71962. Up to 7880 conditions per place. [2023-08-30 00:03:40,367 INFO L137 encePairwiseOnDemand]: 266/272 looper letters, 163 selfloop transitions, 83 changer transitions 5/265 dead transitions. [2023-08-30 00:03:40,367 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 265 transitions, 2665 flow [2023-08-30 00:03:40,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 00:03:40,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 00:03:40,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1003 transitions. [2023-08-30 00:03:40,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5267857142857143 [2023-08-30 00:03:40,369 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1003 transitions. [2023-08-30 00:03:40,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1003 transitions. [2023-08-30 00:03:40,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:03:40,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1003 transitions. [2023-08-30 00:03:40,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 143.28571428571428) internal successors, (1003), 7 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:40,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 272.0) internal successors, (2176), 8 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:40,373 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 272.0) internal successors, (2176), 8 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:40,373 INFO L175 Difference]: Start difference. First operand has 124 places, 83 transitions, 839 flow. Second operand 7 states and 1003 transitions. [2023-08-30 00:03:40,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 265 transitions, 2665 flow [2023-08-30 00:03:40,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 265 transitions, 2572 flow, removed 4 selfloop flow, removed 13 redundant places. [2023-08-30 00:03:40,616 INFO L231 Difference]: Finished difference. Result has 115 places, 150 transitions, 1781 flow [2023-08-30 00:03:40,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1781, PETRI_PLACES=115, PETRI_TRANSITIONS=150} [2023-08-30 00:03:40,617 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 60 predicate places. [2023-08-30 00:03:40,617 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 150 transitions, 1781 flow [2023-08-30 00:03:40,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 131.71428571428572) internal successors, (922), 7 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:40,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:03:40,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:03:40,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 00:03:40,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:03:40,829 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:03:40,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:03:40,829 INFO L85 PathProgramCache]: Analyzing trace with hash -103981559, now seen corresponding path program 2 times [2023-08-30 00:03:40,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:03:40,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765347451] [2023-08-30 00:03:40,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:03:40,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:03:40,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:03:40,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:40,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:03:40,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765347451] [2023-08-30 00:03:40,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765347451] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:03:40,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706618313] [2023-08-30 00:03:40,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:03:40,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:03:40,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:03:40,957 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:03:40,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 00:03:41,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:03:41,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:03:41,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 00:03:41,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:03:41,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:41,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:03:41,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:41,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706618313] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:03:41,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:03:41,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2023-08-30 00:03:41,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688886149] [2023-08-30 00:03:41,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:03:41,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 00:03:41,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:03:41,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 00:03:41,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-30 00:03:41,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 272 [2023-08-30 00:03:41,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 150 transitions, 1781 flow. Second operand has 7 states, 7 states have (on average 131.71428571428572) internal successors, (922), 7 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:41,320 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:03:41,320 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 272 [2023-08-30 00:03:41,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:03:43,387 INFO L130 PetriNetUnfolder]: 16250/22218 cut-off events. [2023-08-30 00:03:43,387 INFO L131 PetriNetUnfolder]: For 166390/179808 co-relation queries the response was YES. [2023-08-30 00:03:43,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113544 conditions, 22218 events. 16250/22218 cut-off events. For 166390/179808 co-relation queries the response was YES. Maximal size of possible extension queue 1236. Compared 128281 event pairs, 2811 based on Foata normal form. 4715/26791 useless extension candidates. Maximal degree in co-relation 113505. Up to 16099 conditions per place. [2023-08-30 00:03:43,748 INFO L137 encePairwiseOnDemand]: 266/272 looper letters, 235 selfloop transitions, 79 changer transitions 5/333 dead transitions. [2023-08-30 00:03:43,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 333 transitions, 3952 flow [2023-08-30 00:03:43,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 00:03:43,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 00:03:43,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 999 transitions. [2023-08-30 00:03:43,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5246848739495799 [2023-08-30 00:03:43,750 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 999 transitions. [2023-08-30 00:03:43,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 999 transitions. [2023-08-30 00:03:43,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:03:43,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 999 transitions. [2023-08-30 00:03:43,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 142.71428571428572) internal successors, (999), 7 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:43,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 272.0) internal successors, (2176), 8 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:43,754 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 272.0) internal successors, (2176), 8 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:43,754 INFO L175 Difference]: Start difference. First operand has 115 places, 150 transitions, 1781 flow. Second operand 7 states and 999 transitions. [2023-08-30 00:03:43,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 333 transitions, 3952 flow [2023-08-30 00:03:44,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 333 transitions, 3752 flow, removed 100 selfloop flow, removed 0 redundant places. [2023-08-30 00:03:44,363 INFO L231 Difference]: Finished difference. Result has 124 places, 222 transitions, 2808 flow [2023-08-30 00:03:44,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=1581, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2808, PETRI_PLACES=124, PETRI_TRANSITIONS=222} [2023-08-30 00:03:44,363 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 69 predicate places. [2023-08-30 00:03:44,363 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 222 transitions, 2808 flow [2023-08-30 00:03:44,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 131.71428571428572) internal successors, (922), 7 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:44,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:03:44,364 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:03:44,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 00:03:44,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-08-30 00:03:44,570 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:03:44,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:03:44,570 INFO L85 PathProgramCache]: Analyzing trace with hash -112611065, now seen corresponding path program 3 times [2023-08-30 00:03:44,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:03:44,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532966608] [2023-08-30 00:03:44,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:03:44,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:03:44,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:03:44,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:44,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:03:44,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532966608] [2023-08-30 00:03:44,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532966608] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:03:44,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323959207] [2023-08-30 00:03:44,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:03:44,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:03:44,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:03:44,668 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:03:44,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 00:03:44,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 00:03:44,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:03:44,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:03:44,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:03:44,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:44,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:03:44,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:44,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323959207] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:03:44,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:03:44,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-30 00:03:44,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304097611] [2023-08-30 00:03:44,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:03:44,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 00:03:44,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:03:44,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 00:03:44,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-08-30 00:03:44,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-08-30 00:03:44,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 222 transitions, 2808 flow. Second operand has 11 states, 11 states have (on average 120.9090909090909) internal successors, (1330), 11 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:44,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:03:44,939 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-08-30 00:03:44,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:03:48,239 INFO L130 PetriNetUnfolder]: 23989/32858 cut-off events. [2023-08-30 00:03:48,239 INFO L131 PetriNetUnfolder]: For 266213/283063 co-relation queries the response was YES. [2023-08-30 00:03:48,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170386 conditions, 32858 events. 23989/32858 cut-off events. For 266213/283063 co-relation queries the response was YES. Maximal size of possible extension queue 1741. Compared 197944 event pairs, 4756 based on Foata normal form. 5790/38560 useless extension candidates. Maximal degree in co-relation 170343. Up to 17582 conditions per place. [2023-08-30 00:03:48,790 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 426 selfloop transitions, 39 changer transitions 0/473 dead transitions. [2023-08-30 00:03:48,790 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 473 transitions, 6340 flow [2023-08-30 00:03:48,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 00:03:48,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 00:03:48,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 926 transitions. [2023-08-30 00:03:48,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48634453781512604 [2023-08-30 00:03:48,792 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 926 transitions. [2023-08-30 00:03:48,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 926 transitions. [2023-08-30 00:03:48,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:03:48,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 926 transitions. [2023-08-30 00:03:48,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 132.28571428571428) internal successors, (926), 7 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:48,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 272.0) internal successors, (2176), 8 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:48,795 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 272.0) internal successors, (2176), 8 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:48,795 INFO L175 Difference]: Start difference. First operand has 124 places, 222 transitions, 2808 flow. Second operand 7 states and 926 transitions. [2023-08-30 00:03:48,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 473 transitions, 6340 flow [2023-08-30 00:03:49,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 473 transitions, 5848 flow, removed 246 selfloop flow, removed 0 redundant places. [2023-08-30 00:03:49,965 INFO L231 Difference]: Finished difference. Result has 134 places, 245 transitions, 2882 flow [2023-08-30 00:03:49,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=2494, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2882, PETRI_PLACES=134, PETRI_TRANSITIONS=245} [2023-08-30 00:03:49,966 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 79 predicate places. [2023-08-30 00:03:49,966 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 245 transitions, 2882 flow [2023-08-30 00:03:49,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 120.9090909090909) internal successors, (1330), 11 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:49,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:03:49,967 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:03:49,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 00:03:50,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-08-30 00:03:50,167 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:03:50,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:03:50,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1052429063, now seen corresponding path program 4 times [2023-08-30 00:03:50,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:03:50,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19586352] [2023-08-30 00:03:50,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:03:50,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:03:50,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:03:50,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:50,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:03:50,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19586352] [2023-08-30 00:03:50,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19586352] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:03:50,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679496550] [2023-08-30 00:03:50,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:03:50,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:03:50,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:03:50,265 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:03:50,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 00:03:50,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:03:50,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:03:50,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:03:50,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:03:50,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:50,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:03:50,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:50,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679496550] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:03:50,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:03:50,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-30 00:03:50,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795439976] [2023-08-30 00:03:50,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:03:50,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 00:03:50,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:03:50,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 00:03:50,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-30 00:03:50,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-08-30 00:03:50,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 245 transitions, 2882 flow. Second operand has 11 states, 11 states have (on average 120.18181818181819) internal successors, (1322), 11 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:50,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:03:50,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-08-30 00:03:50,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:03:54,441 INFO L130 PetriNetUnfolder]: 24767/34055 cut-off events. [2023-08-30 00:03:54,442 INFO L131 PetriNetUnfolder]: For 294765/310653 co-relation queries the response was YES. [2023-08-30 00:03:54,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177769 conditions, 34055 events. 24767/34055 cut-off events. For 294765/310653 co-relation queries the response was YES. Maximal size of possible extension queue 1831. Compared 212440 event pairs, 4612 based on Foata normal form. 5623/39395 useless extension candidates. Maximal degree in co-relation 177721. Up to 16055 conditions per place. [2023-08-30 00:03:55,055 INFO L137 encePairwiseOnDemand]: 266/272 looper letters, 723 selfloop transitions, 54 changer transitions 34/819 dead transitions. [2023-08-30 00:03:55,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 819 transitions, 10837 flow [2023-08-30 00:03:55,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 00:03:55,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 00:03:55,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1435 transitions. [2023-08-30 00:03:55,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47961229946524064 [2023-08-30 00:03:55,057 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1435 transitions. [2023-08-30 00:03:55,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1435 transitions. [2023-08-30 00:03:55,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:03:55,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1435 transitions. [2023-08-30 00:03:55,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 130.45454545454547) internal successors, (1435), 11 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:55,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 272.0) internal successors, (3264), 12 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:55,063 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 272.0) internal successors, (3264), 12 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:55,063 INFO L175 Difference]: Start difference. First operand has 134 places, 245 transitions, 2882 flow. Second operand 11 states and 1435 transitions. [2023-08-30 00:03:55,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 819 transitions, 10837 flow [2023-08-30 00:03:56,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 819 transitions, 10768 flow, removed 20 selfloop flow, removed 2 redundant places. [2023-08-30 00:03:56,398 INFO L231 Difference]: Finished difference. Result has 147 places, 273 transitions, 3323 flow [2023-08-30 00:03:56,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=2832, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3323, PETRI_PLACES=147, PETRI_TRANSITIONS=273} [2023-08-30 00:03:56,398 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 92 predicate places. [2023-08-30 00:03:56,398 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 273 transitions, 3323 flow [2023-08-30 00:03:56,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 120.18181818181819) internal successors, (1322), 11 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:56,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:03:56,399 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:03:56,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 00:03:56,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-08-30 00:03:56,600 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:03:56,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:03:56,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1799135425, now seen corresponding path program 5 times [2023-08-30 00:03:56,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:03:56,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279096897] [2023-08-30 00:03:56,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:03:56,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:03:56,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:03:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:56,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:03:56,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279096897] [2023-08-30 00:03:56,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279096897] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:03:56,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284684207] [2023-08-30 00:03:56,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 00:03:56,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:03:56,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:03:56,678 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:03:56,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 00:03:56,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 00:03:56,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:03:56,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:03:56,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:03:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:56,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:03:56,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:03:56,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284684207] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:03:56,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:03:56,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-30 00:03:56,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60443065] [2023-08-30 00:03:56,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:03:56,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:03:56,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:03:56,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:03:56,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:03:56,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-08-30 00:03:56,934 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 273 transitions, 3323 flow. Second operand has 12 states, 12 states have (on average 119.83333333333333) internal successors, (1438), 12 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:03:56,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:03:56,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-08-30 00:03:56,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:04:06,297 INFO L130 PetriNetUnfolder]: 44809/61566 cut-off events. [2023-08-30 00:04:06,297 INFO L131 PetriNetUnfolder]: For 514484/543802 co-relation queries the response was YES. [2023-08-30 00:04:07,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330312 conditions, 61566 events. 44809/61566 cut-off events. For 514484/543802 co-relation queries the response was YES. Maximal size of possible extension queue 3012. Compared 401937 event pairs, 11114 based on Foata normal form. 10735/72048 useless extension candidates. Maximal degree in co-relation 330259. Up to 23133 conditions per place. [2023-08-30 00:04:07,593 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 744 selfloop transitions, 152 changer transitions 0/904 dead transitions. [2023-08-30 00:04:07,593 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 904 transitions, 11646 flow [2023-08-30 00:04:07,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 00:04:07,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 00:04:07,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1719 transitions. [2023-08-30 00:04:07,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861425339366516 [2023-08-30 00:04:07,595 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1719 transitions. [2023-08-30 00:04:07,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1719 transitions. [2023-08-30 00:04:07,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:04:07,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1719 transitions. [2023-08-30 00:04:07,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 132.23076923076923) internal successors, (1719), 13 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:04:07,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 272.0) internal successors, (3808), 14 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:04:07,599 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 272.0) internal successors, (3808), 14 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:04:07,599 INFO L175 Difference]: Start difference. First operand has 147 places, 273 transitions, 3323 flow. Second operand 13 states and 1719 transitions. [2023-08-30 00:04:07,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 904 transitions, 11646 flow [2023-08-30 00:04:10,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 904 transitions, 11409 flow, removed 79 selfloop flow, removed 1 redundant places. [2023-08-30 00:04:10,978 INFO L231 Difference]: Finished difference. Result has 165 places, 372 transitions, 4792 flow [2023-08-30 00:04:10,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=3216, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4792, PETRI_PLACES=165, PETRI_TRANSITIONS=372} [2023-08-30 00:04:10,979 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 110 predicate places. [2023-08-30 00:04:10,979 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 372 transitions, 4792 flow [2023-08-30 00:04:10,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 119.83333333333333) internal successors, (1438), 12 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:04:10,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:04:10,979 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:04:10,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 00:04:11,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-08-30 00:04:11,182 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:04:11,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:04:11,182 INFO L85 PathProgramCache]: Analyzing trace with hash 59740837, now seen corresponding path program 6 times [2023-08-30 00:04:11,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:04:11,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454623585] [2023-08-30 00:04:11,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:04:11,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:04:11,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:04:11,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:04:11,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:04:11,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454623585] [2023-08-30 00:04:11,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454623585] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:04:11,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889390419] [2023-08-30 00:04:11,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 00:04:11,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:04:11,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:04:11,265 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:04:11,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 00:04:11,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 00:04:11,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:04:11,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:04:11,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:04:11,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:04:11,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:04:11,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:04:11,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889390419] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:04:11,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:04:11,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-30 00:04:11,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140301730] [2023-08-30 00:04:11,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:04:11,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 00:04:11,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:04:11,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 00:04:11,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-08-30 00:04:11,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-08-30 00:04:11,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 372 transitions, 4792 flow. Second operand has 13 states, 13 states have (on average 120.46153846153847) internal successors, (1566), 13 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:04:11,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:04:11,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-08-30 00:04:11,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:04:22,681 INFO L130 PetriNetUnfolder]: 54669/74716 cut-off events. [2023-08-30 00:04:22,682 INFO L131 PetriNetUnfolder]: For 747241/782376 co-relation queries the response was YES. [2023-08-30 00:04:23,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430795 conditions, 74716 events. 54669/74716 cut-off events. For 747241/782376 co-relation queries the response was YES. Maximal size of possible extension queue 3505. Compared 493004 event pairs, 12065 based on Foata normal form. 14110/88664 useless extension candidates. Maximal degree in co-relation 430734. Up to 56939 conditions per place. [2023-08-30 00:04:23,897 INFO L137 encePairwiseOnDemand]: 266/272 looper letters, 693 selfloop transitions, 103 changer transitions 0/804 dead transitions. [2023-08-30 00:04:23,898 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 804 transitions, 11137 flow [2023-08-30 00:04:23,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 00:04:23,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 00:04:23,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1442 transitions. [2023-08-30 00:04:23,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.481951871657754 [2023-08-30 00:04:23,900 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1442 transitions. [2023-08-30 00:04:23,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1442 transitions. [2023-08-30 00:04:23,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:04:23,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1442 transitions. [2023-08-30 00:04:23,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 131.0909090909091) internal successors, (1442), 11 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:04:23,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 272.0) internal successors, (3264), 12 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:04:23,904 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 272.0) internal successors, (3264), 12 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:04:23,904 INFO L175 Difference]: Start difference. First operand has 165 places, 372 transitions, 4792 flow. Second operand 11 states and 1442 transitions. [2023-08-30 00:04:23,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 804 transitions, 11137 flow [2023-08-30 00:04:30,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 804 transitions, 10827 flow, removed 86 selfloop flow, removed 5 redundant places. [2023-08-30 00:04:30,410 INFO L231 Difference]: Finished difference. Result has 175 places, 427 transitions, 5572 flow [2023-08-30 00:04:30,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=4517, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5572, PETRI_PLACES=175, PETRI_TRANSITIONS=427} [2023-08-30 00:04:30,410 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 120 predicate places. [2023-08-30 00:04:30,410 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 427 transitions, 5572 flow [2023-08-30 00:04:30,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 120.46153846153847) internal successors, (1566), 13 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:04:30,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:04:30,411 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:04:30,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-30 00:04:30,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:04:30,617 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:04:30,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:04:30,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1959135719, now seen corresponding path program 7 times [2023-08-30 00:04:30,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:04:30,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587612399] [2023-08-30 00:04:30,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:04:30,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:04:30,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:04:30,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:04:30,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:04:30,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587612399] [2023-08-30 00:04:30,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587612399] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:04:30,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697213530] [2023-08-30 00:04:30,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 00:04:30,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:04:30,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:04:30,689 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:04:30,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 00:04:30,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:04:30,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:04:30,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:04:30,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:04:30,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:04:30,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:04:30,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697213530] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:04:30,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:04:30,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-30 00:04:30,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739442783] [2023-08-30 00:04:30,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:04:30,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:04:30,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:04:30,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:04:30,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:04:30,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-08-30 00:04:30,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 427 transitions, 5572 flow. Second operand has 12 states, 12 states have (on average 119.83333333333333) internal successors, (1438), 12 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:04:30,990 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:04:30,990 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-08-30 00:04:30,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:04:44,651 INFO L130 PetriNetUnfolder]: 60833/84211 cut-off events. [2023-08-30 00:04:44,652 INFO L131 PetriNetUnfolder]: For 1028343/1068291 co-relation queries the response was YES. [2023-08-30 00:04:45,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 518771 conditions, 84211 events. 60833/84211 cut-off events. For 1028343/1068291 co-relation queries the response was YES. Maximal size of possible extension queue 4103. Compared 586961 event pairs, 10753 based on Foata normal form. 15118/99048 useless extension candidates. Maximal degree in co-relation 518706. Up to 29509 conditions per place. [2023-08-30 00:04:46,325 INFO L137 encePairwiseOnDemand]: 266/272 looper letters, 1289 selfloop transitions, 171 changer transitions 13/1481 dead transitions. [2023-08-30 00:04:46,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 1481 transitions, 20392 flow [2023-08-30 00:04:46,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 00:04:46,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 00:04:46,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2356 transitions. [2023-08-30 00:04:46,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4812091503267974 [2023-08-30 00:04:46,328 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2356 transitions. [2023-08-30 00:04:46,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2356 transitions. [2023-08-30 00:04:46,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:04:46,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2356 transitions. [2023-08-30 00:04:46,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 130.88888888888889) internal successors, (2356), 18 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:04:46,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 272.0) internal successors, (5168), 19 states have internal predecessors, (5168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:04:46,335 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 272.0) internal successors, (5168), 19 states have internal predecessors, (5168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:04:46,335 INFO L175 Difference]: Start difference. First operand has 175 places, 427 transitions, 5572 flow. Second operand 18 states and 2356 transitions. [2023-08-30 00:04:46,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 1481 transitions, 20392 flow [2023-08-30 00:04:56,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 1481 transitions, 19956 flow, removed 205 selfloop flow, removed 2 redundant places. [2023-08-30 00:04:56,082 INFO L231 Difference]: Finished difference. Result has 196 places, 492 transitions, 6457 flow [2023-08-30 00:04:56,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=5162, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6457, PETRI_PLACES=196, PETRI_TRANSITIONS=492} [2023-08-30 00:04:56,082 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 141 predicate places. [2023-08-30 00:04:56,083 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 492 transitions, 6457 flow [2023-08-30 00:04:56,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 119.83333333333333) internal successors, (1438), 12 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:04:56,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:04:56,083 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:04:56,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 00:04:56,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:04:56,287 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:04:56,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:04:56,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1199667839, now seen corresponding path program 8 times [2023-08-30 00:04:56,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:04:56,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66152689] [2023-08-30 00:04:56,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:04:56,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:04:56,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:04:56,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:04:56,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:04:56,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66152689] [2023-08-30 00:04:56,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66152689] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:04:56,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5357001] [2023-08-30 00:04:56,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:04:56,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:04:56,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:04:56,365 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:04:56,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 00:04:56,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:04:56,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:04:56,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:04:56,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:04:56,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:04:56,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:04:56,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:04:56,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5357001] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:04:56,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:04:56,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-30 00:04:56,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109617016] [2023-08-30 00:04:56,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:04:56,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 00:04:56,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:04:56,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 00:04:56,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-08-30 00:04:56,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-08-30 00:04:56,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 492 transitions, 6457 flow. Second operand has 13 states, 13 states have (on average 120.3076923076923) internal successors, (1564), 13 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:04:56,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:04:56,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-08-30 00:04:56,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:10,837 INFO L130 PetriNetUnfolder]: 59569/82514 cut-off events. [2023-08-30 00:05:10,837 INFO L131 PetriNetUnfolder]: For 1073927/1111618 co-relation queries the response was YES. [2023-08-30 00:05:12,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 516061 conditions, 82514 events. 59569/82514 cut-off events. For 1073927/1111618 co-relation queries the response was YES. Maximal size of possible extension queue 3980. Compared 573406 event pairs, 12149 based on Foata normal form. 13792/95896 useless extension candidates. Maximal degree in co-relation 515989. Up to 40319 conditions per place. [2023-08-30 00:05:12,680 INFO L137 encePairwiseOnDemand]: 266/272 looper letters, 1093 selfloop transitions, 156 changer transitions 52/1309 dead transitions. [2023-08-30 00:05:12,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 1309 transitions, 18142 flow [2023-08-30 00:05:12,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 00:05:12,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 00:05:12,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2345 transitions. [2023-08-30 00:05:12,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4789624183006536 [2023-08-30 00:05:12,683 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2345 transitions. [2023-08-30 00:05:12,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2345 transitions. [2023-08-30 00:05:12,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:12,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2345 transitions. [2023-08-30 00:05:12,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 130.27777777777777) internal successors, (2345), 18 states have internal predecessors, (2345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:12,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 272.0) internal successors, (5168), 19 states have internal predecessors, (5168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:12,689 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 272.0) internal successors, (5168), 19 states have internal predecessors, (5168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:12,689 INFO L175 Difference]: Start difference. First operand has 196 places, 492 transitions, 6457 flow. Second operand 18 states and 2345 transitions. [2023-08-30 00:05:12,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 1309 transitions, 18142 flow [2023-08-30 00:05:26,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 1309 transitions, 17886 flow, removed 75 selfloop flow, removed 6 redundant places. [2023-08-30 00:05:26,165 INFO L231 Difference]: Finished difference. Result has 209 places, 497 transitions, 6629 flow [2023-08-30 00:05:26,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=6205, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6629, PETRI_PLACES=209, PETRI_TRANSITIONS=497} [2023-08-30 00:05:26,167 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 154 predicate places. [2023-08-30 00:05:26,167 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 497 transitions, 6629 flow [2023-08-30 00:05:26,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 120.3076923076923) internal successors, (1564), 13 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:26,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:26,168 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:26,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 00:05:26,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-30 00:05:26,371 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:05:26,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:26,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1817606293, now seen corresponding path program 9 times [2023-08-30 00:05:26,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:26,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84677720] [2023-08-30 00:05:26,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:26,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:26,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:26,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:26,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:26,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84677720] [2023-08-30 00:05:26,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84677720] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:05:26,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870309825] [2023-08-30 00:05:26,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:05:26,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:26,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:26,445 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:05:26,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 00:05:26,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 00:05:26,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:05:26,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:05:26,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:26,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:26,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:05:26,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:26,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870309825] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:05:26,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:05:26,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-30 00:05:26,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322386599] [2023-08-30 00:05:26,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:05:26,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:05:26,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:26,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:05:26,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:05:26,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-08-30 00:05:26,738 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 497 transitions, 6629 flow. Second operand has 12 states, 12 states have (on average 120.5) internal successors, (1446), 12 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:26,738 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:26,738 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-08-30 00:05:26,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand