./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread-ext/01b_inc.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread-ext/01b_inc.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a50cd99e32ae608752174b749acce795b64973c8c13edb78d7146b3ab3630fc9 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 19:48:11,041 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 19:48:11,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 19:48:11,077 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 19:48:11,077 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 19:48:11,080 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 19:48:11,081 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 19:48:11,083 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 19:48:11,084 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 19:48:11,088 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 19:48:11,088 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 19:48:11,090 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 19:48:11,090 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 19:48:11,092 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 19:48:11,093 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 19:48:11,097 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 19:48:11,097 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 19:48:11,098 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 19:48:11,099 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 19:48:11,103 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 19:48:11,104 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 19:48:11,104 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 19:48:11,105 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 19:48:11,106 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 19:48:11,110 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 19:48:11,111 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 19:48:11,111 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 19:48:11,112 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 19:48:11,113 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 19:48:11,113 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 19:48:11,113 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 19:48:11,115 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 19:48:11,117 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 19:48:11,118 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 19:48:11,118 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 19:48:11,119 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 19:48:11,119 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 19:48:11,119 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 19:48:11,119 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 19:48:11,120 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 19:48:11,120 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 19:48:11,122 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 19:48:11,146 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 19:48:11,146 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 19:48:11,147 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 19:48:11,147 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 19:48:11,148 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 19:48:11,148 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 19:48:11,148 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 19:48:11,148 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 19:48:11,148 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 19:48:11,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 19:48:11,149 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 19:48:11,149 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 19:48:11,149 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 19:48:11,150 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 19:48:11,150 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 19:48:11,150 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 19:48:11,150 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 19:48:11,150 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 19:48:11,150 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 19:48:11,150 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 19:48:11,151 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 19:48:11,151 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 19:48:11,151 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 19:48:11,151 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 19:48:11,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 19:48:11,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:48:11,152 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 19:48:11,152 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 19:48:11,152 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 19:48:11,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 19:48:11,152 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 19:48:11,152 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 19:48:11,153 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 19:48:11,153 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 19:48:11,153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a50cd99e32ae608752174b749acce795b64973c8c13edb78d7146b3ab3630fc9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 19:48:11,405 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 19:48:11,419 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 19:48:11,422 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 19:48:11,423 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 19:48:11,423 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 19:48:11,424 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/01b_inc.i [2023-08-29 19:48:12,273 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 19:48:12,514 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 19:48:12,517 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/01b_inc.i [2023-08-29 19:48:12,530 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afbcc7bea/e8988c23845d4af8949957c31763d277/FLAG3b8cfa7cf [2023-08-29 19:48:12,542 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afbcc7bea/e8988c23845d4af8949957c31763d277 [2023-08-29 19:48:12,543 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 19:48:12,544 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 19:48:12,546 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 19:48:12,546 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 19:48:12,552 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 19:48:12,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:48:12" (1/1) ... [2023-08-29 19:48:12,553 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6704fe30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:48:12, skipping insertion in model container [2023-08-29 19:48:12,553 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:48:12" (1/1) ... [2023-08-29 19:48:12,557 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 19:48:12,588 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 19:48:12,685 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-29 19:48:12,750 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/01b_inc.i[31005,31018] [2023-08-29 19:48:12,755 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:48:12,761 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 19:48:12,771 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-29 19:48:12,785 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/01b_inc.i[31005,31018] [2023-08-29 19:48:12,786 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:48:12,809 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 19:48:12,809 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 19:48:12,809 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 19:48:12,814 INFO L208 MainTranslator]: Completed translation [2023-08-29 19:48:12,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:48:12 WrapperNode [2023-08-29 19:48:12,814 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 19:48:12,815 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 19:48:12,815 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 19:48:12,815 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 19:48:12,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:48:12" (1/1) ... [2023-08-29 19:48:12,827 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:48:12" (1/1) ... [2023-08-29 19:48:12,839 INFO L138 Inliner]: procedures = 173, calls = 20, calls flagged for inlining = 7, calls inlined = 8, statements flattened = 62 [2023-08-29 19:48:12,839 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 19:48:12,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 19:48:12,840 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 19:48:12,840 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 19:48:12,845 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:48:12" (1/1) ... [2023-08-29 19:48:12,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:48:12" (1/1) ... [2023-08-29 19:48:12,846 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:48:12" (1/1) ... [2023-08-29 19:48:12,847 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:48:12" (1/1) ... [2023-08-29 19:48:12,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:48:12" (1/1) ... [2023-08-29 19:48:12,851 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:48:12" (1/1) ... [2023-08-29 19:48:12,852 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:48:12" (1/1) ... [2023-08-29 19:48:12,853 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:48:12" (1/1) ... [2023-08-29 19:48:12,854 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 19:48:12,854 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 19:48:12,854 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 19:48:12,855 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 19:48:12,855 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:48:12" (1/1) ... [2023-08-29 19:48:12,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:48:12,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:48:12,886 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 19:48:12,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 19:48:12,910 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-29 19:48:12,910 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-29 19:48:12,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 19:48:12,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-29 19:48:12,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 19:48:12,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 19:48:12,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 19:48:12,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 19:48:12,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-29 19:48:12,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 19:48:12,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 19:48:12,912 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 19:48:13,018 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 19:48:13,025 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 19:48:13,118 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 19:48:13,147 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 19:48:13,147 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-29 19:48:13,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:48:13 BoogieIcfgContainer [2023-08-29 19:48:13,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 19:48:13,150 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 19:48:13,150 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 19:48:13,152 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 19:48:13,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 07:48:12" (1/3) ... [2023-08-29 19:48:13,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6878bf9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:48:13, skipping insertion in model container [2023-08-29 19:48:13,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:48:12" (2/3) ... [2023-08-29 19:48:13,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6878bf9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:48:13, skipping insertion in model container [2023-08-29 19:48:13,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:48:13" (3/3) ... [2023-08-29 19:48:13,154 INFO L112 eAbstractionObserver]: Analyzing ICFG 01b_inc.i [2023-08-29 19:48:13,164 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 19:48:13,165 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-08-29 19:48:13,165 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 19:48:13,191 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 19:48:13,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 46 transitions, 97 flow [2023-08-29 19:48:13,242 INFO L130 PetriNetUnfolder]: 3/61 cut-off events. [2023-08-29 19:48:13,242 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:48:13,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 61 events. 3/61 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 119 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 31. Up to 4 conditions per place. [2023-08-29 19:48:13,245 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 46 transitions, 97 flow [2023-08-29 19:48:13,247 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 46 transitions, 97 flow [2023-08-29 19:48:13,249 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:48:13,254 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 47 places, 46 transitions, 97 flow [2023-08-29 19:48:13,256 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 47 places, 46 transitions, 97 flow [2023-08-29 19:48:13,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 46 transitions, 97 flow [2023-08-29 19:48:13,265 INFO L130 PetriNetUnfolder]: 3/61 cut-off events. [2023-08-29 19:48:13,266 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:48:13,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 61 events. 3/61 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 119 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 31. Up to 4 conditions per place. [2023-08-29 19:48:13,267 INFO L119 LiptonReduction]: Number of co-enabled transitions 504 [2023-08-29 19:48:14,606 INFO L134 LiptonReduction]: Checked pairs total: 456 [2023-08-29 19:48:14,607 INFO L136 LiptonReduction]: Total number of compositions: 45 [2023-08-29 19:48:14,621 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 19:48:14,626 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;@14ce192b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:48:14,627 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-29 19:48:14,631 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 19:48:14,631 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:48:14,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:48:14,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 19:48:14,632 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 2 more)] === [2023-08-29 19:48:14,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:48:14,639 INFO L85 PathProgramCache]: Analyzing trace with hash 8372, now seen corresponding path program 1 times [2023-08-29 19:48:14,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:48:14,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259340219] [2023-08-29 19:48:14,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:48:14,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:48:14,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:48:14,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:48:14,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:48:14,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259340219] [2023-08-29 19:48:14,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259340219] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:48:14,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:48:14,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:48:14,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415762567] [2023-08-29 19:48:14,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:48:14,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 19:48:14,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:48:14,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 19:48:14,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 19:48:14,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 91 [2023-08-29 19:48:14,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 11 transitions, 27 flow. Second operand has 2 states, 2 states have (on average 39.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:14,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:48:14,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 91 [2023-08-29 19:48:14,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:48:14,819 INFO L130 PetriNetUnfolder]: 4/19 cut-off events. [2023-08-29 19:48:14,819 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:48:14,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 19 events. 4/19 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 34 event pairs, 4 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 26. Up to 19 conditions per place. [2023-08-29 19:48:14,820 INFO L137 encePairwiseOnDemand]: 88/91 looper letters, 7 selfloop transitions, 0 changer transitions 1/8 dead transitions. [2023-08-29 19:48:14,820 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 12 places, 8 transitions, 35 flow [2023-08-29 19:48:14,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 19:48:14,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 19:48:14,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 86 transitions. [2023-08-29 19:48:14,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725274725274725 [2023-08-29 19:48:14,830 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 86 transitions. [2023-08-29 19:48:14,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 86 transitions. [2023-08-29 19:48:14,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:48:14,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 86 transitions. [2023-08-29 19:48:14,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 43.0) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:14,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:14,837 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:14,838 INFO L175 Difference]: Start difference. First operand has 14 places, 11 transitions, 27 flow. Second operand 2 states and 86 transitions. [2023-08-29 19:48:14,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 12 places, 8 transitions, 35 flow [2023-08-29 19:48:14,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 8 transitions, 35 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:48:14,840 INFO L231 Difference]: Finished difference. Result has 12 places, 7 transitions, 17 flow [2023-08-29 19:48:14,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=21, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=17, PETRI_PLACES=12, PETRI_TRANSITIONS=7} [2023-08-29 19:48:14,843 INFO L281 CegarLoopForPetriNet]: 14 programPoint places, -2 predicate places. [2023-08-29 19:48:14,844 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 7 transitions, 17 flow [2023-08-29 19:48:14,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 39.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:14,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:48:14,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 19:48:14,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 19:48:14,845 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 2 more)] === [2023-08-29 19:48:14,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:48:14,845 INFO L85 PathProgramCache]: Analyzing trace with hash 8379, now seen corresponding path program 1 times [2023-08-29 19:48:14,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:48:14,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219871439] [2023-08-29 19:48:14,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:48:14,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:48:14,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:48:14,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:48:14,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:48:14,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219871439] [2023-08-29 19:48:14,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219871439] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:48:14,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:48:14,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:48:14,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858475287] [2023-08-29 19:48:14,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:48:14,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:48:14,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:48:14,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:48:14,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:48:14,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 91 [2023-08-29 19:48:14,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 7 transitions, 17 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:14,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:48:14,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 91 [2023-08-29 19:48:14,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:48:14,951 INFO L130 PetriNetUnfolder]: 3/14 cut-off events. [2023-08-29 19:48:14,951 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:48:14,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 14 events. 3/14 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 16 event pairs, 3 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 30. Up to 14 conditions per place. [2023-08-29 19:48:14,951 INFO L137 encePairwiseOnDemand]: 89/91 looper letters, 5 selfloop transitions, 1 changer transitions 0/6 dead transitions. [2023-08-29 19:48:14,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 12 places, 6 transitions, 27 flow [2023-08-29 19:48:14,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:48:14,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:48:14,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 109 transitions. [2023-08-29 19:48:14,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3992673992673993 [2023-08-29 19:48:14,955 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 109 transitions. [2023-08-29 19:48:14,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 109 transitions. [2023-08-29 19:48:14,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:48:14,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 109 transitions. [2023-08-29 19:48:14,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:14,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:14,960 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:14,960 INFO L175 Difference]: Start difference. First operand has 12 places, 7 transitions, 17 flow. Second operand 3 states and 109 transitions. [2023-08-29 19:48:14,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 12 places, 6 transitions, 27 flow [2023-08-29 19:48:14,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 6 transitions, 27 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:48:14,960 INFO L231 Difference]: Finished difference. Result has 12 places, 6 transitions, 17 flow [2023-08-29 19:48:14,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=15, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=17, PETRI_PLACES=12, PETRI_TRANSITIONS=6} [2023-08-29 19:48:14,961 INFO L281 CegarLoopForPetriNet]: 14 programPoint places, -2 predicate places. [2023-08-29 19:48:14,961 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 6 transitions, 17 flow [2023-08-29 19:48:14,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:14,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:48:14,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 19:48:14,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 19:48:14,962 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 2 more)] === [2023-08-29 19:48:14,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:48:14,964 INFO L85 PathProgramCache]: Analyzing trace with hash 8378, now seen corresponding path program 1 times [2023-08-29 19:48:14,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:48:14,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869516749] [2023-08-29 19:48:14,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:48:14,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:48:14,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:48:15,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:48:15,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:48:15,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869516749] [2023-08-29 19:48:15,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869516749] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:48:15,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:48:15,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:48:15,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831435774] [2023-08-29 19:48:15,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:48:15,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:48:15,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:48:15,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:48:15,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:48:15,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 91 [2023-08-29 19:48:15,042 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 6 transitions, 17 flow. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:15,042 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:48:15,042 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 91 [2023-08-29 19:48:15,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:48:15,051 INFO L130 PetriNetUnfolder]: 2/10 cut-off events. [2023-08-29 19:48:15,051 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:48:15,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 10 events. 2/10 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 7 event pairs, 2 based on Foata normal form. 0/10 useless extension candidates. Maximal degree in co-relation 23. Up to 10 conditions per place. [2023-08-29 19:48:15,051 INFO L137 encePairwiseOnDemand]: 89/91 looper letters, 0 selfloop transitions, 0 changer transitions 5/5 dead transitions. [2023-08-29 19:48:15,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 13 places, 5 transitions, 25 flow [2023-08-29 19:48:15,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:48:15,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:48:15,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2023-08-29 19:48:15,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37362637362637363 [2023-08-29 19:48:15,055 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 102 transitions. [2023-08-29 19:48:15,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 102 transitions. [2023-08-29 19:48:15,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:48:15,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 102 transitions. [2023-08-29 19:48:15,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:15,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:15,058 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:15,058 INFO L175 Difference]: Start difference. First operand has 12 places, 6 transitions, 17 flow. Second operand 3 states and 102 transitions. [2023-08-29 19:48:15,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 13 places, 5 transitions, 25 flow [2023-08-29 19:48:15,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 5 transitions, 24 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:48:15,059 INFO L231 Difference]: Finished difference. Result has 12 places, 0 transitions, 0 flow [2023-08-29 19:48:15,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=14, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=12, PETRI_TRANSITIONS=0} [2023-08-29 19:48:15,059 INFO L281 CegarLoopForPetriNet]: 14 programPoint places, -2 predicate places. [2023-08-29 19:48:15,062 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 0 transitions, 0 flow [2023-08-29 19:48:15,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:15,066 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 5 remaining) [2023-08-29 19:48:15,067 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 5 remaining) [2023-08-29 19:48:15,067 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 5 remaining) [2023-08-29 19:48:15,067 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 5 remaining) [2023-08-29 19:48:15,067 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 5 remaining) [2023-08-29 19:48:15,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 19:48:15,068 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-29 19:48:15,069 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 19:48:15,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 46 transitions, 97 flow [2023-08-29 19:48:15,084 INFO L130 PetriNetUnfolder]: 3/61 cut-off events. [2023-08-29 19:48:15,084 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:48:15,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 61 events. 3/61 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 119 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 31. Up to 4 conditions per place. [2023-08-29 19:48:15,085 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 46 transitions, 97 flow [2023-08-29 19:48:15,086 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 46 transitions, 97 flow [2023-08-29 19:48:15,086 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:48:15,086 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 47 places, 46 transitions, 97 flow [2023-08-29 19:48:15,087 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 47 places, 46 transitions, 97 flow [2023-08-29 19:48:15,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 46 transitions, 97 flow [2023-08-29 19:48:15,101 INFO L130 PetriNetUnfolder]: 3/61 cut-off events. [2023-08-29 19:48:15,101 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:48:15,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 61 events. 3/61 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 119 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 31. Up to 4 conditions per place. [2023-08-29 19:48:15,102 INFO L119 LiptonReduction]: Number of co-enabled transitions 504 [2023-08-29 19:48:16,354 INFO L134 LiptonReduction]: Checked pairs total: 456 [2023-08-29 19:48:16,354 INFO L136 LiptonReduction]: Total number of compositions: 45 [2023-08-29 19:48:16,355 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 19:48:16,356 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;@14ce192b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:48:16,356 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 19:48:16,358 INFO L130 PetriNetUnfolder]: 0/15 cut-off events. [2023-08-29 19:48:16,358 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:48:16,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:48:16,358 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-29 19:48:16,358 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 19:48:16,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:48:16,358 INFO L85 PathProgramCache]: Analyzing trace with hash 481159517, now seen corresponding path program 1 times [2023-08-29 19:48:16,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:48:16,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139397709] [2023-08-29 19:48:16,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:48:16,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:48:16,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:48:16,374 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 19:48:16,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:48:16,389 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 19:48:16,389 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 19:48:16,389 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 19:48:16,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 19:48:16,390 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 19:48:16,390 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 19:48:16,391 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 19:48:16,391 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-29 19:48:16,399 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 19:48:16,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 61 transitions, 134 flow [2023-08-29 19:48:16,406 INFO L130 PetriNetUnfolder]: 5/93 cut-off events. [2023-08-29 19:48:16,406 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:48:16,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 93 events. 5/93 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 213 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 62. Up to 6 conditions per place. [2023-08-29 19:48:16,407 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 61 transitions, 134 flow [2023-08-29 19:48:16,407 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 61 transitions, 134 flow [2023-08-29 19:48:16,407 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:48:16,408 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 63 places, 61 transitions, 134 flow [2023-08-29 19:48:16,408 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 63 places, 61 transitions, 134 flow [2023-08-29 19:48:16,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 61 transitions, 134 flow [2023-08-29 19:48:16,413 INFO L130 PetriNetUnfolder]: 5/93 cut-off events. [2023-08-29 19:48:16,413 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:48:16,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 93 events. 5/93 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 213 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 62. Up to 6 conditions per place. [2023-08-29 19:48:16,414 INFO L119 LiptonReduction]: Number of co-enabled transitions 1428 [2023-08-29 19:48:17,223 INFO L134 LiptonReduction]: Checked pairs total: 5137 [2023-08-29 19:48:17,224 INFO L136 LiptonReduction]: Total number of compositions: 39 [2023-08-29 19:48:17,225 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 19:48:17,225 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;@14ce192b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:48:17,226 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 19:48:17,226 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 19:48:17,226 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:48:17,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:48:17,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 19:48:17,227 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 19:48:17,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:48:17,227 INFO L85 PathProgramCache]: Analyzing trace with hash 13497, now seen corresponding path program 1 times [2023-08-29 19:48:17,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:48:17,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298654008] [2023-08-29 19:48:17,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:48:17,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:48:17,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:48:17,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:48:17,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:48:17,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298654008] [2023-08-29 19:48:17,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298654008] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:48:17,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:48:17,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:48:17,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232843139] [2023-08-29 19:48:17,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:48:17,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 19:48:17,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:48:17,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 19:48:17,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 19:48:17,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 100 [2023-08-29 19:48:17,242 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 70 flow. Second operand has 2 states, 2 states have (on average 48.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:17,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:48:17,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 100 [2023-08-29 19:48:17,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:48:17,278 INFO L130 PetriNetUnfolder]: 196/414 cut-off events. [2023-08-29 19:48:17,278 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-08-29 19:48:17,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 763 conditions, 414 events. 196/414 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2281 event pairs, 152 based on Foata normal form. 0/276 useless extension candidates. Maximal degree in co-relation 238. Up to 321 conditions per place. [2023-08-29 19:48:17,280 INFO L137 encePairwiseOnDemand]: 98/100 looper letters, 16 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2023-08-29 19:48:17,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 98 flow [2023-08-29 19:48:17,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 19:48:17,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 19:48:17,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 112 transitions. [2023-08-29 19:48:17,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2023-08-29 19:48:17,281 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 112 transitions. [2023-08-29 19:48:17,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 112 transitions. [2023-08-29 19:48:17,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:48:17,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 112 transitions. [2023-08-29 19:48:17,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 56.0) internal successors, (112), 2 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:17,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:17,282 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:17,283 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 70 flow. Second operand 2 states and 112 transitions. [2023-08-29 19:48:17,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 98 flow [2023-08-29 19:48:17,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 27 transitions, 96 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-29 19:48:17,283 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 64 flow [2023-08-29 19:48:17,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=64, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-08-29 19:48:17,284 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -1 predicate places. [2023-08-29 19:48:17,284 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 64 flow [2023-08-29 19:48:17,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 48.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:17,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:48:17,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 19:48:17,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 19:48:17,285 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 19:48:17,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:48:17,285 INFO L85 PathProgramCache]: Analyzing trace with hash 13502, now seen corresponding path program 1 times [2023-08-29 19:48:17,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:48:17,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422953760] [2023-08-29 19:48:17,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:48:17,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:48:17,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:48:17,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:48:17,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:48:17,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422953760] [2023-08-29 19:48:17,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422953760] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:48:17,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:48:17,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:48:17,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303558482] [2023-08-29 19:48:17,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:48:17,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:48:17,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:48:17,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:48:17,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:48:17,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 100 [2023-08-29 19:48:17,330 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:17,330 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:48:17,330 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 100 [2023-08-29 19:48:17,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:48:17,362 INFO L130 PetriNetUnfolder]: 141/308 cut-off events. [2023-08-29 19:48:17,362 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-29 19:48:17,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 308 events. 141/308 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1576 event pairs, 108 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 563. Up to 234 conditions per place. [2023-08-29 19:48:17,364 INFO L137 encePairwiseOnDemand]: 98/100 looper letters, 14 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-08-29 19:48:17,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 26 transitions, 92 flow [2023-08-29 19:48:17,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:48:17,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:48:17,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 145 transitions. [2023-08-29 19:48:17,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2023-08-29 19:48:17,369 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 145 transitions. [2023-08-29 19:48:17,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 145 transitions. [2023-08-29 19:48:17,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:48:17,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 145 transitions. [2023-08-29 19:48:17,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:17,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:17,371 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:17,371 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 64 flow. Second operand 3 states and 145 transitions. [2023-08-29 19:48:17,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 26 transitions, 92 flow [2023-08-29 19:48:17,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 26 transitions, 92 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:48:17,372 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 64 flow [2023-08-29 19:48:17,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2023-08-29 19:48:17,373 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-08-29 19:48:17,373 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 64 flow [2023-08-29 19:48:17,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:17,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:48:17,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 19:48:17,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 19:48:17,374 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 19:48:17,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:48:17,374 INFO L85 PathProgramCache]: Analyzing trace with hash 13501, now seen corresponding path program 1 times [2023-08-29 19:48:17,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:48:17,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187267352] [2023-08-29 19:48:17,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:48:17,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:48:17,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:48:17,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:48:17,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:48:17,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187267352] [2023-08-29 19:48:17,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187267352] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:48:17,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:48:17,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:48:17,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127612943] [2023-08-29 19:48:17,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:48:17,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:48:17,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:48:17,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:48:17,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:48:17,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 100 [2023-08-29 19:48:17,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:17,402 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:48:17,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 100 [2023-08-29 19:48:17,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:48:17,426 INFO L130 PetriNetUnfolder]: 86/202 cut-off events. [2023-08-29 19:48:17,426 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-29 19:48:17,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 202 events. 86/202 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 909 event pairs, 64 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 372. Up to 148 conditions per place. [2023-08-29 19:48:17,428 INFO L137 encePairwiseOnDemand]: 98/100 looper letters, 13 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-08-29 19:48:17,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 25 transitions, 90 flow [2023-08-29 19:48:17,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:48:17,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:48:17,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 138 transitions. [2023-08-29 19:48:17,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2023-08-29 19:48:17,430 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 138 transitions. [2023-08-29 19:48:17,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 138 transitions. [2023-08-29 19:48:17,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:48:17,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 138 transitions. [2023-08-29 19:48:17,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:17,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:17,432 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:17,432 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 64 flow. Second operand 3 states and 138 transitions. [2023-08-29 19:48:17,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 25 transitions, 90 flow [2023-08-29 19:48:17,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 25 transitions, 89 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:48:17,433 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 63 flow [2023-08-29 19:48:17,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=63, PETRI_PLACES=32, PETRI_TRANSITIONS=25} [2023-08-29 19:48:17,434 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-08-29 19:48:17,434 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 63 flow [2023-08-29 19:48:17,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:17,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:48:17,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:48:17,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 19:48:17,436 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 19:48:17,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:48:17,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1391578471, now seen corresponding path program 1 times [2023-08-29 19:48:17,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:48:17,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404050252] [2023-08-29 19:48:17,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:48:17,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:48:17,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:48:17,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:48:17,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:48:17,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404050252] [2023-08-29 19:48:17,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404050252] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:48:17,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:48:17,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:48:17,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592281007] [2023-08-29 19:48:17,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:48:17,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:48:17,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:48:17,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:48:17,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:48:17,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 100 [2023-08-29 19:48:17,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 63 flow. Second operand has 5 states, 5 states have (on average 41.6) internal successors, (208), 5 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:17,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:48:17,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 100 [2023-08-29 19:48:17,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:48:17,685 INFO L130 PetriNetUnfolder]: 200/387 cut-off events. [2023-08-29 19:48:17,685 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-29 19:48:17,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 788 conditions, 387 events. 200/387 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1943 event pairs, 51 based on Foata normal form. 12/350 useless extension candidates. Maximal degree in co-relation 782. Up to 128 conditions per place. [2023-08-29 19:48:17,686 INFO L137 encePairwiseOnDemand]: 92/100 looper letters, 32 selfloop transitions, 9 changer transitions 3/50 dead transitions. [2023-08-29 19:48:17,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 50 transitions, 211 flow [2023-08-29 19:48:17,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 19:48:17,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 19:48:17,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 288 transitions. [2023-08-29 19:48:17,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2023-08-29 19:48:17,688 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 288 transitions. [2023-08-29 19:48:17,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 288 transitions. [2023-08-29 19:48:17,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:48:17,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 288 transitions. [2023-08-29 19:48:17,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 48.0) internal successors, (288), 6 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:17,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 100.0) internal successors, (700), 7 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:17,691 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 100.0) internal successors, (700), 7 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:17,691 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 63 flow. Second operand 6 states and 288 transitions. [2023-08-29 19:48:17,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 50 transitions, 211 flow [2023-08-29 19:48:17,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 50 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:48:17,692 INFO L231 Difference]: Finished difference. Result has 39 places, 29 transitions, 107 flow [2023-08-29 19:48:17,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=107, PETRI_PLACES=39, PETRI_TRANSITIONS=29} [2023-08-29 19:48:17,693 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 7 predicate places. [2023-08-29 19:48:17,693 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 29 transitions, 107 flow [2023-08-29 19:48:17,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.6) internal successors, (208), 5 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:17,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:48:17,694 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:48:17,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 19:48:17,694 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 19:48:17,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:48:17,694 INFO L85 PathProgramCache]: Analyzing trace with hash -296433441, now seen corresponding path program 1 times [2023-08-29 19:48:17,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:48:17,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593379116] [2023-08-29 19:48:17,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:48:17,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:48:17,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:48:17,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 19:48:17,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:48:17,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593379116] [2023-08-29 19:48:17,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593379116] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:48:17,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:48:17,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:48:17,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58224805] [2023-08-29 19:48:17,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:48:17,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:48:17,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:48:17,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:48:17,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:48:17,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 100 [2023-08-29 19:48:17,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 29 transitions, 107 flow. Second operand has 5 states, 5 states have (on average 41.8) internal successors, (209), 5 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:17,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:48:17,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 100 [2023-08-29 19:48:17,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:48:17,866 INFO L130 PetriNetUnfolder]: 199/407 cut-off events. [2023-08-29 19:48:17,866 INFO L131 PetriNetUnfolder]: For 131/133 co-relation queries the response was YES. [2023-08-29 19:48:17,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 937 conditions, 407 events. 199/407 cut-off events. For 131/133 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2141 event pairs, 51 based on Foata normal form. 2/381 useless extension candidates. Maximal degree in co-relation 928. Up to 146 conditions per place. [2023-08-29 19:48:17,868 INFO L137 encePairwiseOnDemand]: 94/100 looper letters, 29 selfloop transitions, 11 changer transitions 3/50 dead transitions. [2023-08-29 19:48:17,868 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 50 transitions, 255 flow [2023-08-29 19:48:17,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 19:48:17,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 19:48:17,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 282 transitions. [2023-08-29 19:48:17,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47 [2023-08-29 19:48:17,869 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 282 transitions. [2023-08-29 19:48:17,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 282 transitions. [2023-08-29 19:48:17,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:48:17,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 282 transitions. [2023-08-29 19:48:17,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 47.0) internal successors, (282), 6 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:17,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 100.0) internal successors, (700), 7 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:17,871 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 100.0) internal successors, (700), 7 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:17,871 INFO L175 Difference]: Start difference. First operand has 39 places, 29 transitions, 107 flow. Second operand 6 states and 282 transitions. [2023-08-29 19:48:17,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 50 transitions, 255 flow [2023-08-29 19:48:17,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 50 transitions, 255 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:48:17,873 INFO L231 Difference]: Finished difference. Result has 45 places, 31 transitions, 156 flow [2023-08-29 19:48:17,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=156, PETRI_PLACES=45, PETRI_TRANSITIONS=31} [2023-08-29 19:48:17,874 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 13 predicate places. [2023-08-29 19:48:17,874 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 31 transitions, 156 flow [2023-08-29 19:48:17,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.8) internal successors, (209), 5 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:17,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:48:17,874 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:48:17,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 19:48:17,874 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 19:48:17,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:48:17,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1917521523, now seen corresponding path program 1 times [2023-08-29 19:48:17,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:48:17,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740192135] [2023-08-29 19:48:17,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:48:17,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:48:17,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:48:17,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 19:48:17,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:48:17,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740192135] [2023-08-29 19:48:17,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740192135] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:48:17,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:48:17,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 19:48:17,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458151620] [2023-08-29 19:48:17,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:48:17,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 19:48:17,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:48:17,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 19:48:17,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-29 19:48:17,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 100 [2023-08-29 19:48:17,998 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 31 transitions, 156 flow. Second operand has 7 states, 7 states have (on average 39.714285714285715) internal successors, (278), 7 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:17,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:48:17,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 100 [2023-08-29 19:48:17,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:48:18,118 INFO L130 PetriNetUnfolder]: 185/382 cut-off events. [2023-08-29 19:48:18,119 INFO L131 PetriNetUnfolder]: For 305/305 co-relation queries the response was YES. [2023-08-29 19:48:18,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 998 conditions, 382 events. 185/382 cut-off events. For 305/305 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2027 event pairs, 38 based on Foata normal form. 12/393 useless extension candidates. Maximal degree in co-relation 986. Up to 97 conditions per place. [2023-08-29 19:48:18,120 INFO L137 encePairwiseOnDemand]: 92/100 looper letters, 28 selfloop transitions, 9 changer transitions 15/57 dead transitions. [2023-08-29 19:48:18,120 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 57 transitions, 330 flow [2023-08-29 19:48:18,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 19:48:18,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 19:48:18,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 357 transitions. [2023-08-29 19:48:18,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44625 [2023-08-29 19:48:18,122 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 357 transitions. [2023-08-29 19:48:18,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 357 transitions. [2023-08-29 19:48:18,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:48:18,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 357 transitions. [2023-08-29 19:48:18,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 44.625) internal successors, (357), 8 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:18,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 100.0) internal successors, (900), 9 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:18,124 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 100.0) internal successors, (900), 9 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:18,124 INFO L175 Difference]: Start difference. First operand has 45 places, 31 transitions, 156 flow. Second operand 8 states and 357 transitions. [2023-08-29 19:48:18,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 57 transitions, 330 flow [2023-08-29 19:48:18,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 57 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:48:18,128 INFO L231 Difference]: Finished difference. Result has 51 places, 27 transitions, 149 flow [2023-08-29 19:48:18,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=149, PETRI_PLACES=51, PETRI_TRANSITIONS=27} [2023-08-29 19:48:18,128 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 19 predicate places. [2023-08-29 19:48:18,128 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 27 transitions, 149 flow [2023-08-29 19:48:18,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 39.714285714285715) internal successors, (278), 7 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:18,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:48:18,129 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:48:18,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 19:48:18,129 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 19:48:18,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:48:18,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1340777215, now seen corresponding path program 2 times [2023-08-29 19:48:18,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:48:18,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442250712] [2023-08-29 19:48:18,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:48:18,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:48:18,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:48:18,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 19:48:18,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:48:18,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442250712] [2023-08-29 19:48:18,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442250712] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:48:18,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:48:18,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 19:48:18,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58498859] [2023-08-29 19:48:18,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:48:18,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 19:48:18,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:48:18,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 19:48:18,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-29 19:48:18,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 100 [2023-08-29 19:48:18,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 27 transitions, 149 flow. Second operand has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:18,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:48:18,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 100 [2023-08-29 19:48:18,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:48:18,332 INFO L130 PetriNetUnfolder]: 206/435 cut-off events. [2023-08-29 19:48:18,333 INFO L131 PetriNetUnfolder]: For 640/640 co-relation queries the response was YES. [2023-08-29 19:48:18,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1221 conditions, 435 events. 206/435 cut-off events. For 640/640 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2478 event pairs, 68 based on Foata normal form. 12/446 useless extension candidates. Maximal degree in co-relation 1208. Up to 227 conditions per place. [2023-08-29 19:48:18,334 INFO L137 encePairwiseOnDemand]: 91/100 looper letters, 26 selfloop transitions, 10 changer transitions 7/48 dead transitions. [2023-08-29 19:48:18,334 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 48 transitions, 331 flow [2023-08-29 19:48:18,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 19:48:18,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 19:48:18,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 310 transitions. [2023-08-29 19:48:18,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2023-08-29 19:48:18,336 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 310 transitions. [2023-08-29 19:48:18,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 310 transitions. [2023-08-29 19:48:18,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:48:18,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 310 transitions. [2023-08-29 19:48:18,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 44.285714285714285) internal successors, (310), 7 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:18,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 100.0) internal successors, (800), 8 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:18,338 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 100.0) internal successors, (800), 8 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:18,338 INFO L175 Difference]: Start difference. First operand has 51 places, 27 transitions, 149 flow. Second operand 7 states and 310 transitions. [2023-08-29 19:48:18,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 48 transitions, 331 flow [2023-08-29 19:48:18,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 48 transitions, 292 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-29 19:48:18,341 INFO L231 Difference]: Finished difference. Result has 49 places, 31 transitions, 181 flow [2023-08-29 19:48:18,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=181, PETRI_PLACES=49, PETRI_TRANSITIONS=31} [2023-08-29 19:48:18,341 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 17 predicate places. [2023-08-29 19:48:18,342 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 31 transitions, 181 flow [2023-08-29 19:48:18,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:18,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:48:18,342 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:48:18,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 19:48:18,342 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 19:48:18,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:48:18,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1870964381, now seen corresponding path program 3 times [2023-08-29 19:48:18,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:48:18,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115007103] [2023-08-29 19:48:18,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:48:18,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:48:18,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:48:18,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 19:48:18,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:48:18,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115007103] [2023-08-29 19:48:18,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115007103] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:48:18,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:48:18,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 19:48:18,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721561579] [2023-08-29 19:48:18,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:48:18,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 19:48:18,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:48:18,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 19:48:18,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-29 19:48:18,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 100 [2023-08-29 19:48:18,455 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 31 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:18,455 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:48:18,455 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 100 [2023-08-29 19:48:18,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:48:18,527 INFO L130 PetriNetUnfolder]: 206/443 cut-off events. [2023-08-29 19:48:18,527 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-29 19:48:18,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1257 conditions, 443 events. 206/443 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2549 event pairs, 84 based on Foata normal form. 12/454 useless extension candidates. Maximal degree in co-relation 1243. Up to 181 conditions per place. [2023-08-29 19:48:18,528 INFO L137 encePairwiseOnDemand]: 92/100 looper letters, 22 selfloop transitions, 10 changer transitions 10/47 dead transitions. [2023-08-29 19:48:18,528 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 47 transitions, 337 flow [2023-08-29 19:48:18,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 19:48:18,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 19:48:18,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 265 transitions. [2023-08-29 19:48:18,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2023-08-29 19:48:18,530 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 265 transitions. [2023-08-29 19:48:18,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 265 transitions. [2023-08-29 19:48:18,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:48:18,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 265 transitions. [2023-08-29 19:48:18,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 44.166666666666664) internal successors, (265), 6 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:18,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 100.0) internal successors, (700), 7 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:18,533 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 100.0) internal successors, (700), 7 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:18,533 INFO L175 Difference]: Start difference. First operand has 49 places, 31 transitions, 181 flow. Second operand 6 states and 265 transitions. [2023-08-29 19:48:18,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 47 transitions, 337 flow [2023-08-29 19:48:18,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 47 transitions, 311 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-29 19:48:18,535 INFO L231 Difference]: Finished difference. Result has 51 places, 31 transitions, 199 flow [2023-08-29 19:48:18,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=199, PETRI_PLACES=51, PETRI_TRANSITIONS=31} [2023-08-29 19:48:18,536 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 19 predicate places. [2023-08-29 19:48:18,536 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 31 transitions, 199 flow [2023-08-29 19:48:18,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:18,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:48:18,536 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:48:18,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 19:48:18,537 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 19:48:18,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:48:18,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1195243119, now seen corresponding path program 1 times [2023-08-29 19:48:18,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:48:18,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836556846] [2023-08-29 19:48:18,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:48:18,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:48:18,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:48:18,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 19:48:18,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:48:18,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836556846] [2023-08-29 19:48:18,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836556846] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:48:18,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:48:18,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 19:48:18,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725217911] [2023-08-29 19:48:18,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:48:18,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 19:48:18,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:48:18,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 19:48:18,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-29 19:48:18,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 100 [2023-08-29 19:48:18,685 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 31 transitions, 199 flow. Second operand has 7 states, 7 states have (on average 39.714285714285715) internal successors, (278), 7 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:18,685 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:48:18,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 100 [2023-08-29 19:48:18,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:48:18,754 INFO L130 PetriNetUnfolder]: 75/175 cut-off events. [2023-08-29 19:48:18,754 INFO L131 PetriNetUnfolder]: For 335/335 co-relation queries the response was YES. [2023-08-29 19:48:18,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 563 conditions, 175 events. 75/175 cut-off events. For 335/335 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 713 event pairs, 7 based on Foata normal form. 12/186 useless extension candidates. Maximal degree in co-relation 548. Up to 49 conditions per place. [2023-08-29 19:48:18,755 INFO L137 encePairwiseOnDemand]: 93/100 looper letters, 0 selfloop transitions, 0 changer transitions 37/37 dead transitions. [2023-08-29 19:48:18,755 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 37 transitions, 263 flow [2023-08-29 19:48:18,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 19:48:18,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 19:48:18,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 292 transitions. [2023-08-29 19:48:18,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41714285714285715 [2023-08-29 19:48:18,756 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 292 transitions. [2023-08-29 19:48:18,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 292 transitions. [2023-08-29 19:48:18,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:48:18,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 292 transitions. [2023-08-29 19:48:18,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 41.714285714285715) internal successors, (292), 7 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:18,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 100.0) internal successors, (800), 8 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:18,757 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 100.0) internal successors, (800), 8 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:18,758 INFO L175 Difference]: Start difference. First operand has 51 places, 31 transitions, 199 flow. Second operand 7 states and 292 transitions. [2023-08-29 19:48:18,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 37 transitions, 263 flow [2023-08-29 19:48:18,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 37 transitions, 226 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-08-29 19:48:18,759 INFO L231 Difference]: Finished difference. Result has 47 places, 0 transitions, 0 flow [2023-08-29 19:48:18,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=47, PETRI_TRANSITIONS=0} [2023-08-29 19:48:18,759 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 15 predicate places. [2023-08-29 19:48:18,759 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 0 transitions, 0 flow [2023-08-29 19:48:18,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 39.714285714285715) internal successors, (278), 7 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:18,759 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 6 remaining) [2023-08-29 19:48:18,760 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 6 remaining) [2023-08-29 19:48:18,760 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 6 remaining) [2023-08-29 19:48:18,760 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (2 of 6 remaining) [2023-08-29 19:48:18,760 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 6 remaining) [2023-08-29 19:48:18,760 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 6 remaining) [2023-08-29 19:48:18,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-29 19:48:18,760 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1] [2023-08-29 19:48:18,761 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 19:48:18,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 61 transitions, 134 flow [2023-08-29 19:48:18,765 INFO L130 PetriNetUnfolder]: 5/93 cut-off events. [2023-08-29 19:48:18,765 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:48:18,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 93 events. 5/93 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 213 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 62. Up to 6 conditions per place. [2023-08-29 19:48:18,766 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 61 transitions, 134 flow [2023-08-29 19:48:18,766 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 61 transitions, 134 flow [2023-08-29 19:48:18,766 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:48:18,766 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 63 places, 61 transitions, 134 flow [2023-08-29 19:48:18,766 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 63 places, 61 transitions, 134 flow [2023-08-29 19:48:18,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 61 transitions, 134 flow [2023-08-29 19:48:18,770 INFO L130 PetriNetUnfolder]: 5/93 cut-off events. [2023-08-29 19:48:18,770 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:48:18,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 93 events. 5/93 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 213 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 62. Up to 6 conditions per place. [2023-08-29 19:48:18,771 INFO L119 LiptonReduction]: Number of co-enabled transitions 1428 [2023-08-29 19:48:19,608 INFO L134 LiptonReduction]: Checked pairs total: 4514 [2023-08-29 19:48:19,609 INFO L136 LiptonReduction]: Total number of compositions: 39 [2023-08-29 19:48:19,609 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 19:48:19,610 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;@14ce192b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:48:19,610 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 19:48:19,612 INFO L130 PetriNetUnfolder]: 1/36 cut-off events. [2023-08-29 19:48:19,612 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:48:19,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:48:19,612 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-29 19:48:19,612 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 19:48:19,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:48:19,612 INFO L85 PathProgramCache]: Analyzing trace with hash 221733906, now seen corresponding path program 1 times [2023-08-29 19:48:19,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:48:19,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352583371] [2023-08-29 19:48:19,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:48:19,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:48:19,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:48:19,618 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 19:48:19,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:48:19,623 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 19:48:19,623 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 19:48:19,623 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 19:48:19,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-29 19:48:19,624 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 19:48:19,624 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 19:48:19,624 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 19:48:19,624 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-29 19:48:19,636 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 19:48:19,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 76 transitions, 173 flow [2023-08-29 19:48:19,642 INFO L130 PetriNetUnfolder]: 7/125 cut-off events. [2023-08-29 19:48:19,643 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 19:48:19,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 125 events. 7/125 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 321 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 97. Up to 8 conditions per place. [2023-08-29 19:48:19,643 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 76 transitions, 173 flow [2023-08-29 19:48:19,643 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 76 transitions, 173 flow [2023-08-29 19:48:19,644 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:48:19,644 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 76 transitions, 173 flow [2023-08-29 19:48:19,644 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 79 places, 76 transitions, 173 flow [2023-08-29 19:48:19,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 76 transitions, 173 flow [2023-08-29 19:48:19,649 INFO L130 PetriNetUnfolder]: 7/125 cut-off events. [2023-08-29 19:48:19,649 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 19:48:19,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 125 events. 7/125 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 321 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 97. Up to 8 conditions per place. [2023-08-29 19:48:19,651 INFO L119 LiptonReduction]: Number of co-enabled transitions 2772 [2023-08-29 19:48:20,658 INFO L134 LiptonReduction]: Checked pairs total: 11707 [2023-08-29 19:48:20,658 INFO L136 LiptonReduction]: Total number of compositions: 45 [2023-08-29 19:48:20,659 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 19:48:20,659 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;@14ce192b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:48:20,659 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-29 19:48:20,659 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 19:48:20,660 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:48:20,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:48:20,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 19:48:20,660 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 19:48:20,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:48:20,660 INFO L85 PathProgramCache]: Analyzing trace with hash 19097, now seen corresponding path program 1 times [2023-08-29 19:48:20,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:48:20,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949543113] [2023-08-29 19:48:20,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:48:20,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:48:20,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:48:20,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:48:20,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:48:20,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949543113] [2023-08-29 19:48:20,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949543113] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:48:20,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:48:20,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:48:20,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643077495] [2023-08-29 19:48:20,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:48:20,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 19:48:20,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:48:20,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 19:48:20,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 19:48:20,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 121 [2023-08-29 19:48:20,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 99 flow. Second operand has 2 states, 2 states have (on average 57.0) internal successors, (114), 2 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:20,667 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:48:20,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 121 [2023-08-29 19:48:20,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:48:20,796 INFO L130 PetriNetUnfolder]: 1596/2690 cut-off events. [2023-08-29 19:48:20,796 INFO L131 PetriNetUnfolder]: For 211/211 co-relation queries the response was YES. [2023-08-29 19:48:20,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5092 conditions, 2690 events. 1596/2690 cut-off events. For 211/211 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 17476 event pairs, 1252 based on Foata normal form. 0/1868 useless extension candidates. Maximal degree in co-relation 769. Up to 2221 conditions per place. [2023-08-29 19:48:20,806 INFO L137 encePairwiseOnDemand]: 119/121 looper letters, 22 selfloop transitions, 0 changer transitions 0/37 dead transitions. [2023-08-29 19:48:20,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 37 transitions, 139 flow [2023-08-29 19:48:20,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 19:48:20,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 19:48:20,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 136 transitions. [2023-08-29 19:48:20,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5619834710743802 [2023-08-29 19:48:20,807 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 136 transitions. [2023-08-29 19:48:20,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 136 transitions. [2023-08-29 19:48:20,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:48:20,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 136 transitions. [2023-08-29 19:48:20,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 68.0) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:20,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:20,808 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:20,809 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 99 flow. Second operand 2 states and 136 transitions. [2023-08-29 19:48:20,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 37 transitions, 139 flow [2023-08-29 19:48:20,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 37 transitions, 133 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-29 19:48:20,810 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 89 flow [2023-08-29 19:48:20,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=89, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2023-08-29 19:48:20,810 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2023-08-29 19:48:20,810 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 89 flow [2023-08-29 19:48:20,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 57.0) internal successors, (114), 2 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:20,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:48:20,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 19:48:20,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-29 19:48:20,811 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 19:48:20,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:48:20,811 INFO L85 PathProgramCache]: Analyzing trace with hash 19101, now seen corresponding path program 1 times [2023-08-29 19:48:20,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:48:20,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440462492] [2023-08-29 19:48:20,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:48:20,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:48:20,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:48:20,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:48:20,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:48:20,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440462492] [2023-08-29 19:48:20,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440462492] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:48:20,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:48:20,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:48:20,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084429061] [2023-08-29 19:48:20,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:48:20,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:48:20,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:48:20,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:48:20,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:48:20,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 121 [2023-08-29 19:48:20,841 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:20,841 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:48:20,841 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 121 [2023-08-29 19:48:20,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:48:20,947 INFO L130 PetriNetUnfolder]: 1166/2004 cut-off events. [2023-08-29 19:48:20,947 INFO L131 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2023-08-29 19:48:20,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3756 conditions, 2004 events. 1166/2004 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 12546 event pairs, 908 based on Foata normal form. 0/1455 useless extension candidates. Maximal degree in co-relation 3750. Up to 1634 conditions per place. [2023-08-29 19:48:20,955 INFO L137 encePairwiseOnDemand]: 119/121 looper letters, 20 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2023-08-29 19:48:20,955 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 36 transitions, 129 flow [2023-08-29 19:48:20,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:48:20,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:48:20,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 172 transitions. [2023-08-29 19:48:20,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738292011019284 [2023-08-29 19:48:20,957 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 172 transitions. [2023-08-29 19:48:20,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 172 transitions. [2023-08-29 19:48:20,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:48:20,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 172 transitions. [2023-08-29 19:48:20,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:20,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:20,958 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:20,958 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 89 flow. Second operand 3 states and 172 transitions. [2023-08-29 19:48:20,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 36 transitions, 129 flow [2023-08-29 19:48:20,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 36 transitions, 129 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:48:20,959 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 89 flow [2023-08-29 19:48:20,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2023-08-29 19:48:20,959 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2023-08-29 19:48:20,960 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 89 flow [2023-08-29 19:48:20,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:20,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:48:20,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 19:48:20,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-29 19:48:20,960 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 19:48:20,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:48:20,961 INFO L85 PathProgramCache]: Analyzing trace with hash 19102, now seen corresponding path program 1 times [2023-08-29 19:48:20,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:48:20,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847770598] [2023-08-29 19:48:20,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:48:20,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:48:20,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:48:20,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:48:20,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:48:20,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847770598] [2023-08-29 19:48:20,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847770598] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:48:20,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:48:20,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:48:20,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015922610] [2023-08-29 19:48:20,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:48:20,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:48:20,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:48:20,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:48:20,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:48:20,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 121 [2023-08-29 19:48:20,987 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:20,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:48:20,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 121 [2023-08-29 19:48:20,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:48:21,070 INFO L130 PetriNetUnfolder]: 736/1318 cut-off events. [2023-08-29 19:48:21,071 INFO L131 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2023-08-29 19:48:21,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2486 conditions, 1318 events. 736/1318 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7766 event pairs, 564 based on Foata normal form. 0/1042 useless extension candidates. Maximal degree in co-relation 2479. Up to 1048 conditions per place. [2023-08-29 19:48:21,076 INFO L137 encePairwiseOnDemand]: 119/121 looper letters, 19 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2023-08-29 19:48:21,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 35 transitions, 127 flow [2023-08-29 19:48:21,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:48:21,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:48:21,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 177 transitions. [2023-08-29 19:48:21,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48760330578512395 [2023-08-29 19:48:21,077 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 177 transitions. [2023-08-29 19:48:21,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 177 transitions. [2023-08-29 19:48:21,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:48:21,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 177 transitions. [2023-08-29 19:48:21,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:21,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:21,078 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:21,078 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 89 flow. Second operand 3 states and 177 transitions. [2023-08-29 19:48:21,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 35 transitions, 127 flow [2023-08-29 19:48:21,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 35 transitions, 126 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:48:21,079 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 88 flow [2023-08-29 19:48:21,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=41, 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=88, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2023-08-29 19:48:21,079 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2023-08-29 19:48:21,080 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 88 flow [2023-08-29 19:48:21,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:21,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:48:21,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:48:21,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-29 19:48:21,080 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 19:48:21,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:48:21,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1663720039, now seen corresponding path program 1 times [2023-08-29 19:48:21,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:48:21,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992556962] [2023-08-29 19:48:21,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:48:21,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:48:21,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:48:21,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:48:21,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:48:21,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992556962] [2023-08-29 19:48:21,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992556962] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:48:21,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:48:21,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:48:21,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223672137] [2023-08-29 19:48:21,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:48:21,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:48:21,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:48:21,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:48:21,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:48:21,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 121 [2023-08-29 19:48:21,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 48.6) internal successors, (243), 5 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:21,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:48:21,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 121 [2023-08-29 19:48:21,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:48:21,510 INFO L130 PetriNetUnfolder]: 3340/4906 cut-off events. [2023-08-29 19:48:21,510 INFO L131 PetriNetUnfolder]: For 251/251 co-relation queries the response was YES. [2023-08-29 19:48:21,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10044 conditions, 4906 events. 3340/4906 cut-off events. For 251/251 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 28358 event pairs, 1049 based on Foata normal form. 44/4289 useless extension candidates. Maximal degree in co-relation 10037. Up to 2052 conditions per place. [2023-08-29 19:48:21,529 INFO L137 encePairwiseOnDemand]: 111/121 looper letters, 70 selfloop transitions, 12 changer transitions 0/90 dead transitions. [2023-08-29 19:48:21,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 90 transitions, 392 flow [2023-08-29 19:48:21,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 19:48:21,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 19:48:21,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 370 transitions. [2023-08-29 19:48:21,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.509641873278237 [2023-08-29 19:48:21,530 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 370 transitions. [2023-08-29 19:48:21,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 370 transitions. [2023-08-29 19:48:21,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:48:21,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 370 transitions. [2023-08-29 19:48:21,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 61.666666666666664) internal successors, (370), 6 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:21,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 121.0) internal successors, (847), 7 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:21,533 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 121.0) internal successors, (847), 7 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:21,533 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 88 flow. Second operand 6 states and 370 transitions. [2023-08-29 19:48:21,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 90 transitions, 392 flow [2023-08-29 19:48:21,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 90 transitions, 391 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:48:21,535 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 178 flow [2023-08-29 19:48:21,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=178, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2023-08-29 19:48:21,536 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2023-08-29 19:48:21,536 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 178 flow [2023-08-29 19:48:21,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.6) internal successors, (243), 5 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:21,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:48:21,536 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:48:21,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-29 19:48:21,537 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 19:48:21,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:48:21,537 INFO L85 PathProgramCache]: Analyzing trace with hash -201461486, now seen corresponding path program 1 times [2023-08-29 19:48:21,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:48:21,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625941635] [2023-08-29 19:48:21,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:48:21,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:48:21,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:48:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 19:48:21,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:48:21,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625941635] [2023-08-29 19:48:21,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625941635] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:48:21,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:48:21,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:48:21,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362287302] [2023-08-29 19:48:21,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:48:21,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:48:21,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:48:21,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:48:21,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:48:21,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 121 [2023-08-29 19:48:21,623 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 178 flow. Second operand has 5 states, 5 states have (on average 48.8) internal successors, (244), 5 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:21,623 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:48:21,623 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 121 [2023-08-29 19:48:21,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:48:22,208 INFO L130 PetriNetUnfolder]: 5434/8184 cut-off events. [2023-08-29 19:48:22,209 INFO L131 PetriNetUnfolder]: For 3196/3248 co-relation queries the response was YES. [2023-08-29 19:48:22,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19126 conditions, 8184 events. 5434/8184 cut-off events. For 3196/3248 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 54790 event pairs, 1847 based on Foata normal form. 50/7370 useless extension candidates. Maximal degree in co-relation 19115. Up to 3679 conditions per place. [2023-08-29 19:48:22,239 INFO L137 encePairwiseOnDemand]: 114/121 looper letters, 75 selfloop transitions, 19 changer transitions 0/103 dead transitions. [2023-08-29 19:48:22,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 103 transitions, 568 flow [2023-08-29 19:48:22,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 19:48:22,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 19:48:22,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 364 transitions. [2023-08-29 19:48:22,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013774104683195 [2023-08-29 19:48:22,241 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 364 transitions. [2023-08-29 19:48:22,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 364 transitions. [2023-08-29 19:48:22,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:48:22,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 364 transitions. [2023-08-29 19:48:22,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.666666666666664) internal successors, (364), 6 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:22,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 121.0) internal successors, (847), 7 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:22,243 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 121.0) internal successors, (847), 7 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:22,243 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 178 flow. Second operand 6 states and 364 transitions. [2023-08-29 19:48:22,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 103 transitions, 568 flow [2023-08-29 19:48:22,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 103 transitions, 568 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:48:22,247 INFO L231 Difference]: Finished difference. Result has 58 places, 59 transitions, 308 flow [2023-08-29 19:48:22,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=308, PETRI_PLACES=58, PETRI_TRANSITIONS=59} [2023-08-29 19:48:22,248 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2023-08-29 19:48:22,248 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 59 transitions, 308 flow [2023-08-29 19:48:22,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.8) internal successors, (244), 5 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:22,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:48:22,248 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:48:22,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-29 19:48:22,248 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 19:48:22,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:48:22,249 INFO L85 PathProgramCache]: Analyzing trace with hash -66588813, now seen corresponding path program 1 times [2023-08-29 19:48:22,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:48:22,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790468439] [2023-08-29 19:48:22,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:48:22,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:48:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:48:22,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-29 19:48:22,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:48:22,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790468439] [2023-08-29 19:48:22,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790468439] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:48:22,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:48:22,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:48:22,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061527835] [2023-08-29 19:48:22,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:48:22,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:48:22,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:48:22,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:48:22,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:48:22,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 121 [2023-08-29 19:48:22,333 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 59 transitions, 308 flow. Second operand has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:22,333 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:48:22,333 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 121 [2023-08-29 19:48:22,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:48:23,169 INFO L130 PetriNetUnfolder]: 7395/11341 cut-off events. [2023-08-29 19:48:23,169 INFO L131 PetriNetUnfolder]: For 8011/8199 co-relation queries the response was YES. [2023-08-29 19:48:23,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28223 conditions, 11341 events. 7395/11341 cut-off events. For 8011/8199 co-relation queries the response was YES. Maximal size of possible extension queue 936. Compared 81610 event pairs, 2541 based on Foata normal form. 182/10925 useless extension candidates. Maximal degree in co-relation 28209. Up to 5358 conditions per place. [2023-08-29 19:48:23,210 INFO L137 encePairwiseOnDemand]: 114/121 looper letters, 82 selfloop transitions, 27 changer transitions 0/119 dead transitions. [2023-08-29 19:48:23,211 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 119 transitions, 812 flow [2023-08-29 19:48:23,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 19:48:23,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 19:48:23,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 361 transitions. [2023-08-29 19:48:23,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4972451790633609 [2023-08-29 19:48:23,212 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 361 transitions. [2023-08-29 19:48:23,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 361 transitions. [2023-08-29 19:48:23,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:48:23,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 361 transitions. [2023-08-29 19:48:23,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.166666666666664) internal successors, (361), 6 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:23,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 121.0) internal successors, (847), 7 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:23,215 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 121.0) internal successors, (847), 7 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:23,215 INFO L175 Difference]: Start difference. First operand has 58 places, 59 transitions, 308 flow. Second operand 6 states and 361 transitions. [2023-08-29 19:48:23,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 119 transitions, 812 flow [2023-08-29 19:48:23,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 119 transitions, 812 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:48:23,226 INFO L231 Difference]: Finished difference. Result has 65 places, 76 transitions, 534 flow [2023-08-29 19:48:23,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=534, PETRI_PLACES=65, PETRI_TRANSITIONS=76} [2023-08-29 19:48:23,226 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 22 predicate places. [2023-08-29 19:48:23,226 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 76 transitions, 534 flow [2023-08-29 19:48:23,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:23,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:48:23,227 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:48:23,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-29 19:48:23,227 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 19:48:23,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:48:23,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1297190208, now seen corresponding path program 1 times [2023-08-29 19:48:23,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:48:23,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344014985] [2023-08-29 19:48:23,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:48:23,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:48:23,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:48:23,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:48:23,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:48:23,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344014985] [2023-08-29 19:48:23,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344014985] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:48:23,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900583816] [2023-08-29 19:48:23,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:48:23,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:48:23,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:48:23,310 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:48:23,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-29 19:48:23,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:48:23,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 19:48:23,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:48:23,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:48:23,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:48:23,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:48:23,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900583816] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:48:23,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:48:23,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2023-08-29 19:48:23,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315195545] [2023-08-29 19:48:23,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:48:23,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 19:48:23,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:48:23,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 19:48:23,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-08-29 19:48:23,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 121 [2023-08-29 19:48:23,670 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 76 transitions, 534 flow. Second operand has 15 states, 15 states have (on average 43.13333333333333) internal successors, (647), 15 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:23,670 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:48:23,670 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 121 [2023-08-29 19:48:23,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:48:27,334 INFO L130 PetriNetUnfolder]: 22329/34290 cut-off events. [2023-08-29 19:48:27,335 INFO L131 PetriNetUnfolder]: For 32807/33107 co-relation queries the response was YES. [2023-08-29 19:48:27,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90887 conditions, 34290 events. 22329/34290 cut-off events. For 32807/33107 co-relation queries the response was YES. Maximal size of possible extension queue 2855. Compared 289555 event pairs, 1936 based on Foata normal form. 2468/36717 useless extension candidates. Maximal degree in co-relation 90870. Up to 5846 conditions per place. [2023-08-29 19:48:27,523 INFO L137 encePairwiseOnDemand]: 95/121 looper letters, 441 selfloop transitions, 362 changer transitions 8/816 dead transitions. [2023-08-29 19:48:27,523 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 816 transitions, 5493 flow [2023-08-29 19:48:27,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-29 19:48:27,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-29 19:48:27,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2745 transitions. [2023-08-29 19:48:27,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47262396694214875 [2023-08-29 19:48:27,530 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2745 transitions. [2023-08-29 19:48:27,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2745 transitions. [2023-08-29 19:48:27,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:48:27,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2745 transitions. [2023-08-29 19:48:27,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 57.1875) internal successors, (2745), 48 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:27,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 121.0) internal successors, (5929), 49 states have internal predecessors, (5929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:27,542 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 121.0) internal successors, (5929), 49 states have internal predecessors, (5929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:27,542 INFO L175 Difference]: Start difference. First operand has 65 places, 76 transitions, 534 flow. Second operand 48 states and 2745 transitions. [2023-08-29 19:48:27,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 816 transitions, 5493 flow [2023-08-29 19:48:27,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 816 transitions, 5493 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:48:27,659 INFO L231 Difference]: Finished difference. Result has 151 places, 444 transitions, 4605 flow [2023-08-29 19:48:27,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=4605, PETRI_PLACES=151, PETRI_TRANSITIONS=444} [2023-08-29 19:48:27,660 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2023-08-29 19:48:27,660 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 444 transitions, 4605 flow [2023-08-29 19:48:27,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 43.13333333333333) internal successors, (647), 15 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:27,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:48:27,661 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:48:27,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-29 19:48:27,865 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,SelfDestructingSolverStorable20 [2023-08-29 19:48:27,865 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 19:48:27,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:48:27,865 INFO L85 PathProgramCache]: Analyzing trace with hash -846987932, now seen corresponding path program 1 times [2023-08-29 19:48:27,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:48:27,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009615736] [2023-08-29 19:48:27,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:48:27,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:48:27,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:48:27,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 19:48:27,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:48:27,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009615736] [2023-08-29 19:48:27,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009615736] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:48:27,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:48:27,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 19:48:27,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364522727] [2023-08-29 19:48:27,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:48:27,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 19:48:27,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:48:27,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 19:48:27,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-29 19:48:27,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 121 [2023-08-29 19:48:27,977 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 444 transitions, 4605 flow. Second operand has 6 states, 6 states have (on average 47.0) internal successors, (282), 6 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:27,977 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:48:27,977 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 121 [2023-08-29 19:48:27,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:48:33,589 INFO L130 PetriNetUnfolder]: 25070/39173 cut-off events. [2023-08-29 19:48:33,590 INFO L131 PetriNetUnfolder]: For 895600/897942 co-relation queries the response was YES. [2023-08-29 19:48:33,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297713 conditions, 39173 events. 25070/39173 cut-off events. For 895600/897942 co-relation queries the response was YES. Maximal size of possible extension queue 3347. Compared 342935 event pairs, 7174 based on Foata normal form. 934/39605 useless extension candidates. Maximal degree in co-relation 297657. Up to 30756 conditions per place. [2023-08-29 19:48:34,065 INFO L137 encePairwiseOnDemand]: 112/121 looper letters, 459 selfloop transitions, 79 changer transitions 1/579 dead transitions. [2023-08-29 19:48:34,066 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 579 transitions, 7396 flow [2023-08-29 19:48:34,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 19:48:34,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 19:48:34,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 466 transitions. [2023-08-29 19:48:34,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48140495867768596 [2023-08-29 19:48:34,068 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 466 transitions. [2023-08-29 19:48:34,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 466 transitions. [2023-08-29 19:48:34,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:48:34,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 466 transitions. [2023-08-29 19:48:34,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 58.25) internal successors, (466), 8 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:34,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 121.0) internal successors, (1089), 9 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:34,072 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 121.0) internal successors, (1089), 9 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:34,072 INFO L175 Difference]: Start difference. First operand has 151 places, 444 transitions, 4605 flow. Second operand 8 states and 466 transitions. [2023-08-29 19:48:34,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 579 transitions, 7396 flow [2023-08-29 19:48:38,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 579 transitions, 6760 flow, removed 185 selfloop flow, removed 5 redundant places. [2023-08-29 19:48:38,628 INFO L231 Difference]: Finished difference. Result has 157 places, 497 transitions, 5019 flow [2023-08-29 19:48:38,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=4088, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5019, PETRI_PLACES=157, PETRI_TRANSITIONS=497} [2023-08-29 19:48:38,629 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2023-08-29 19:48:38,629 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 497 transitions, 5019 flow [2023-08-29 19:48:38,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 47.0) internal successors, (282), 6 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:38,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:48:38,630 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:48:38,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-29 19:48:38,630 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 19:48:38,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:48:38,630 INFO L85 PathProgramCache]: Analyzing trace with hash 232088542, now seen corresponding path program 2 times [2023-08-29 19:48:38,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:48:38,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120960584] [2023-08-29 19:48:38,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:48:38,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:48:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:48:38,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 19:48:38,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:48:38,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120960584] [2023-08-29 19:48:38,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120960584] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:48:38,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:48:38,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 19:48:38,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87700696] [2023-08-29 19:48:38,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:48:38,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 19:48:38,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:48:38,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 19:48:38,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-29 19:48:38,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 121 [2023-08-29 19:48:38,734 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 497 transitions, 5019 flow. Second operand has 7 states, 7 states have (on average 46.714285714285715) internal successors, (327), 7 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:38,734 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:48:38,734 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 121 [2023-08-29 19:48:38,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:48:44,175 INFO L130 PetriNetUnfolder]: 23437/37052 cut-off events. [2023-08-29 19:48:44,175 INFO L131 PetriNetUnfolder]: For 894597/896771 co-relation queries the response was YES. [2023-08-29 19:48:44,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281333 conditions, 37052 events. 23437/37052 cut-off events. For 894597/896771 co-relation queries the response was YES. Maximal size of possible extension queue 3236. Compared 328447 event pairs, 5061 based on Foata normal form. 1544/38030 useless extension candidates. Maximal degree in co-relation 281273. Up to 16724 conditions per place. [2023-08-29 19:48:44,554 INFO L137 encePairwiseOnDemand]: 110/121 looper letters, 421 selfloop transitions, 187 changer transitions 13/661 dead transitions. [2023-08-29 19:48:44,554 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 661 transitions, 7990 flow [2023-08-29 19:48:44,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 19:48:44,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 19:48:44,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 523 transitions. [2023-08-29 19:48:44,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.480257116620753 [2023-08-29 19:48:44,555 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 523 transitions. [2023-08-29 19:48:44,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 523 transitions. [2023-08-29 19:48:44,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:48:44,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 523 transitions. [2023-08-29 19:48:44,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.111111111111114) internal successors, (523), 9 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:44,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 121.0) internal successors, (1210), 10 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:44,562 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 121.0) internal successors, (1210), 10 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:44,562 INFO L175 Difference]: Start difference. First operand has 157 places, 497 transitions, 5019 flow. Second operand 9 states and 523 transitions. [2023-08-29 19:48:44,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 661 transitions, 7990 flow [2023-08-29 19:48:48,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 661 transitions, 7962 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-29 19:48:48,455 INFO L231 Difference]: Finished difference. Result has 167 places, 488 transitions, 5432 flow [2023-08-29 19:48:48,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=4891, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5432, PETRI_PLACES=167, PETRI_TRANSITIONS=488} [2023-08-29 19:48:48,456 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2023-08-29 19:48:48,456 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 488 transitions, 5432 flow [2023-08-29 19:48:48,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 46.714285714285715) internal successors, (327), 7 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:48,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:48:48,457 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:48:48,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-29 19:48:48,457 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 19:48:48,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:48:48,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1085878318, now seen corresponding path program 2 times [2023-08-29 19:48:48,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:48:48,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375547149] [2023-08-29 19:48:48,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:48:48,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:48:48,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:48:48,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 19:48:48,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:48:48,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375547149] [2023-08-29 19:48:48,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375547149] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:48:48,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:48:48,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 19:48:48,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602058186] [2023-08-29 19:48:48,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:48:48,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 19:48:48,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:48:48,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 19:48:48,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-29 19:48:48,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 121 [2023-08-29 19:48:48,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 488 transitions, 5432 flow. Second operand has 6 states, 6 states have (on average 47.0) internal successors, (282), 6 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:48,566 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:48:48,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 121 [2023-08-29 19:48:48,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:48:55,438 INFO L130 PetriNetUnfolder]: 28596/45415 cut-off events. [2023-08-29 19:48:55,438 INFO L131 PetriNetUnfolder]: For 1096187/1099249 co-relation queries the response was YES. [2023-08-29 19:48:55,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351557 conditions, 45415 events. 28596/45415 cut-off events. For 1096187/1099249 co-relation queries the response was YES. Maximal size of possible extension queue 4101. Compared 417168 event pairs, 8139 based on Foata normal form. 1338/46087 useless extension candidates. Maximal degree in co-relation 351493. Up to 28487 conditions per place. [2023-08-29 19:48:55,954 INFO L137 encePairwiseOnDemand]: 111/121 looper letters, 490 selfloop transitions, 161 changer transitions 5/696 dead transitions. [2023-08-29 19:48:55,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 696 transitions, 9212 flow [2023-08-29 19:48:55,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 19:48:55,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 19:48:55,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 459 transitions. [2023-08-29 19:48:55,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47417355371900827 [2023-08-29 19:48:55,956 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 459 transitions. [2023-08-29 19:48:55,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 459 transitions. [2023-08-29 19:48:55,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:48:55,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 459 transitions. [2023-08-29 19:48:55,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 57.375) internal successors, (459), 8 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:55,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 121.0) internal successors, (1089), 9 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:55,958 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 121.0) internal successors, (1089), 9 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:55,958 INFO L175 Difference]: Start difference. First operand has 167 places, 488 transitions, 5432 flow. Second operand 8 states and 459 transitions. [2023-08-29 19:48:55,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 696 transitions, 9212 flow [2023-08-29 19:49:02,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 696 transitions, 8732 flow, removed 18 selfloop flow, removed 5 redundant places. [2023-08-29 19:49:02,259 INFO L231 Difference]: Finished difference. Result has 172 places, 589 transitions, 7149 flow [2023-08-29 19:49:02,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=4982, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7149, PETRI_PLACES=172, PETRI_TRANSITIONS=589} [2023-08-29 19:49:02,260 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 129 predicate places. [2023-08-29 19:49:02,260 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 589 transitions, 7149 flow [2023-08-29 19:49:02,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 47.0) internal successors, (282), 6 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:02,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:49:02,260 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:49:02,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-29 19:49:02,261 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 19:49:02,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:49:02,261 INFO L85 PathProgramCache]: Analyzing trace with hash -201827139, now seen corresponding path program 1 times [2023-08-29 19:49:02,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:49:02,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833689918] [2023-08-29 19:49:02,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:49:02,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:49:02,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:49:02,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 19:49:02,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:49:02,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833689918] [2023-08-29 19:49:02,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833689918] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:49:02,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697299576] [2023-08-29 19:49:02,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:49:02,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:49:02,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:49:02,392 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:49:02,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-29 19:49:02,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:49:02,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-29 19:49:02,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:49:02,469 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 19:49:02,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:49:02,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697299576] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:49:02,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 19:49:02,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2023-08-29 19:49:02,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028965944] [2023-08-29 19:49:02,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:49:02,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:49:02,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:49:02,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:49:02,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-29 19:49:02,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 121 [2023-08-29 19:49:02,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 589 transitions, 7149 flow. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:02,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:49:02,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 121 [2023-08-29 19:49:02,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:49:02,864 INFO L130 PetriNetUnfolder]: 1373/2607 cut-off events. [2023-08-29 19:49:02,865 INFO L131 PetriNetUnfolder]: For 63375/63565 co-relation queries the response was YES. [2023-08-29 19:49:02,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19550 conditions, 2607 events. 1373/2607 cut-off events. For 63375/63565 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 18671 event pairs, 566 based on Foata normal form. 180/2697 useless extension candidates. Maximal degree in co-relation 19482. Up to 1365 conditions per place. [2023-08-29 19:49:02,884 INFO L137 encePairwiseOnDemand]: 113/121 looper letters, 62 selfloop transitions, 24 changer transitions 0/137 dead transitions. [2023-08-29 19:49:02,884 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 137 transitions, 1498 flow [2023-08-29 19:49:02,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:49:02,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:49:02,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 196 transitions. [2023-08-29 19:49:02,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5399449035812672 [2023-08-29 19:49:02,886 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 196 transitions. [2023-08-29 19:49:02,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 196 transitions. [2023-08-29 19:49:02,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:49:02,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 196 transitions. [2023-08-29 19:49:02,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:02,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:02,888 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:02,888 INFO L175 Difference]: Start difference. First operand has 172 places, 589 transitions, 7149 flow. Second operand 3 states and 196 transitions. [2023-08-29 19:49:02,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 137 transitions, 1498 flow [2023-08-29 19:49:02,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 137 transitions, 1210 flow, removed 99 selfloop flow, removed 32 redundant places. [2023-08-29 19:49:02,968 INFO L231 Difference]: Finished difference. Result has 125 places, 117 transitions, 909 flow [2023-08-29 19:49:02,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=861, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=909, PETRI_PLACES=125, PETRI_TRANSITIONS=117} [2023-08-29 19:49:02,968 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2023-08-29 19:49:02,968 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 117 transitions, 909 flow [2023-08-29 19:49:02,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:02,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:49:02,969 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:49:02,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-29 19:49:03,169 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,SelfDestructingSolverStorable24 [2023-08-29 19:49:03,169 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 19:49:03,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:49:03,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1242500861, now seen corresponding path program 1 times [2023-08-29 19:49:03,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:49:03,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585586917] [2023-08-29 19:49:03,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:49:03,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:49:03,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:49:03,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 19:49:03,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:49:03,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585586917] [2023-08-29 19:49:03,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585586917] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:49:03,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825759901] [2023-08-29 19:49:03,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:49:03,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:49:03,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:49:03,254 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:49:03,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-29 19:49:03,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:49:03,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-29 19:49:03,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:49:03,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 19:49:03,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:49:03,487 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 19:49:03,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825759901] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:49:03,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:49:03,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2023-08-29 19:49:03,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308118552] [2023-08-29 19:49:03,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:49:03,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 19:49:03,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:49:03,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 19:49:03,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-08-29 19:49:03,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 121 [2023-08-29 19:49:03,548 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 117 transitions, 909 flow. Second operand has 15 states, 15 states have (on average 43.53333333333333) internal successors, (653), 15 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:03,548 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:49:03,548 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 121 [2023-08-29 19:49:03,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:49:04,832 INFO L130 PetriNetUnfolder]: 1671/2950 cut-off events. [2023-08-29 19:49:04,832 INFO L131 PetriNetUnfolder]: For 44352/44352 co-relation queries the response was YES. [2023-08-29 19:49:04,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18930 conditions, 2950 events. 1671/2950 cut-off events. For 44352/44352 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 20866 event pairs, 114 based on Foata normal form. 50/2999 useless extension candidates. Maximal degree in co-relation 18886. Up to 1063 conditions per place. [2023-08-29 19:49:04,849 INFO L137 encePairwiseOnDemand]: 100/121 looper letters, 191 selfloop transitions, 78 changer transitions 11/289 dead transitions. [2023-08-29 19:49:04,849 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 289 transitions, 3753 flow [2023-08-29 19:49:04,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-29 19:49:04,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-29 19:49:04,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1730 transitions. [2023-08-29 19:49:04,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3971533516988062 [2023-08-29 19:49:04,852 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1730 transitions. [2023-08-29 19:49:04,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1730 transitions. [2023-08-29 19:49:04,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:49:04,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1730 transitions. [2023-08-29 19:49:04,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 48.05555555555556) internal successors, (1730), 36 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:04,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 121.0) internal successors, (4477), 37 states have internal predecessors, (4477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:04,858 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 121.0) internal successors, (4477), 37 states have internal predecessors, (4477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:04,859 INFO L175 Difference]: Start difference. First operand has 125 places, 117 transitions, 909 flow. Second operand 36 states and 1730 transitions. [2023-08-29 19:49:04,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 289 transitions, 3753 flow [2023-08-29 19:49:04,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 289 transitions, 3498 flow, removed 107 selfloop flow, removed 5 redundant places. [2023-08-29 19:49:04,914 INFO L231 Difference]: Finished difference. Result has 166 places, 131 transitions, 1487 flow [2023-08-29 19:49:04,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=765, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1487, PETRI_PLACES=166, PETRI_TRANSITIONS=131} [2023-08-29 19:49:04,914 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2023-08-29 19:49:04,915 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 131 transitions, 1487 flow [2023-08-29 19:49:04,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 43.53333333333333) internal successors, (653), 15 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:04,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:49:04,915 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:49:04,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-29 19:49:05,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:49:05,115 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 19:49:05,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:49:05,116 INFO L85 PathProgramCache]: Analyzing trace with hash -315928794, now seen corresponding path program 1 times [2023-08-29 19:49:05,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:49:05,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668723910] [2023-08-29 19:49:05,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:49:05,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:49:05,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:49:05,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-29 19:49:05,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:49:05,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668723910] [2023-08-29 19:49:05,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668723910] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:49:05,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:49:05,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 19:49:05,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520349005] [2023-08-29 19:49:05,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:49:05,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 19:49:05,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:49:05,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 19:49:05,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-29 19:49:05,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 121 [2023-08-29 19:49:05,234 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 131 transitions, 1487 flow. Second operand has 7 states, 7 states have (on average 46.857142857142854) internal successors, (328), 7 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:05,234 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:49:05,234 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 121 [2023-08-29 19:49:05,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:49:05,593 INFO L130 PetriNetUnfolder]: 1396/2572 cut-off events. [2023-08-29 19:49:05,593 INFO L131 PetriNetUnfolder]: For 63966/64045 co-relation queries the response was YES. [2023-08-29 19:49:05,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20184 conditions, 2572 events. 1396/2572 cut-off events. For 63966/64045 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 18008 event pairs, 453 based on Foata normal form. 64/2623 useless extension candidates. Maximal degree in co-relation 20126. Up to 1453 conditions per place. [2023-08-29 19:49:05,610 INFO L137 encePairwiseOnDemand]: 112/121 looper letters, 134 selfloop transitions, 21 changer transitions 17/195 dead transitions. [2023-08-29 19:49:05,611 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 195 transitions, 2726 flow [2023-08-29 19:49:05,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 19:49:05,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 19:49:05,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 487 transitions. [2023-08-29 19:49:05,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44719926538108357 [2023-08-29 19:49:05,612 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 487 transitions. [2023-08-29 19:49:05,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 487 transitions. [2023-08-29 19:49:05,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:49:05,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 487 transitions. [2023-08-29 19:49:05,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 54.111111111111114) internal successors, (487), 9 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:05,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 121.0) internal successors, (1210), 10 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:05,614 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 121.0) internal successors, (1210), 10 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:05,614 INFO L175 Difference]: Start difference. First operand has 166 places, 131 transitions, 1487 flow. Second operand 9 states and 487 transitions. [2023-08-29 19:49:05,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 195 transitions, 2726 flow [2023-08-29 19:49:05,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 195 transitions, 2378 flow, removed 135 selfloop flow, removed 12 redundant places. [2023-08-29 19:49:05,704 INFO L231 Difference]: Finished difference. Result has 164 places, 133 transitions, 1263 flow [2023-08-29 19:49:05,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=1191, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1263, PETRI_PLACES=164, PETRI_TRANSITIONS=133} [2023-08-29 19:49:05,704 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2023-08-29 19:49:05,704 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 133 transitions, 1263 flow [2023-08-29 19:49:05,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 46.857142857142854) internal successors, (328), 7 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:05,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:49:05,704 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:49:05,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-29 19:49:05,705 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 19:49:05,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:49:05,705 INFO L85 PathProgramCache]: Analyzing trace with hash -756191146, now seen corresponding path program 1 times [2023-08-29 19:49:05,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:49:05,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782783664] [2023-08-29 19:49:05,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:49:05,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:49:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:49:05,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-29 19:49:05,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:49:05,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782783664] [2023-08-29 19:49:05,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782783664] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:49:05,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:49:05,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 19:49:05,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604644973] [2023-08-29 19:49:05,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:49:05,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 19:49:05,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:49:05,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 19:49:05,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-29 19:49:05,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 121 [2023-08-29 19:49:05,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 133 transitions, 1263 flow. Second operand has 7 states, 7 states have (on average 46.857142857142854) internal successors, (328), 7 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:05,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:49:05,839 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 121 [2023-08-29 19:49:05,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:49:06,154 INFO L130 PetriNetUnfolder]: 1183/2193 cut-off events. [2023-08-29 19:49:06,154 INFO L131 PetriNetUnfolder]: For 55760/55763 co-relation queries the response was YES. [2023-08-29 19:49:06,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16868 conditions, 2193 events. 1183/2193 cut-off events. For 55760/55763 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 14758 event pairs, 405 based on Foata normal form. 60/2250 useless extension candidates. Maximal degree in co-relation 16808. Up to 1218 conditions per place. [2023-08-29 19:49:06,169 INFO L137 encePairwiseOnDemand]: 110/121 looper letters, 113 selfloop transitions, 18 changer transitions 20/172 dead transitions. [2023-08-29 19:49:06,169 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 172 transitions, 2113 flow [2023-08-29 19:49:06,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 19:49:06,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 19:49:06,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 482 transitions. [2023-08-29 19:49:06,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4426078971533517 [2023-08-29 19:49:06,173 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 482 transitions. [2023-08-29 19:49:06,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 482 transitions. [2023-08-29 19:49:06,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:49:06,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 482 transitions. [2023-08-29 19:49:06,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 53.55555555555556) internal successors, (482), 9 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:06,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 121.0) internal successors, (1210), 10 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:06,175 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 121.0) internal successors, (1210), 10 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:06,175 INFO L175 Difference]: Start difference. First operand has 164 places, 133 transitions, 1263 flow. Second operand 9 states and 482 transitions. [2023-08-29 19:49:06,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 172 transitions, 2113 flow [2023-08-29 19:49:06,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 172 transitions, 2070 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-08-29 19:49:06,229 INFO L231 Difference]: Finished difference. Result has 169 places, 115 transitions, 1073 flow [2023-08-29 19:49:06,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=1138, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1073, PETRI_PLACES=169, PETRI_TRANSITIONS=115} [2023-08-29 19:49:06,230 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2023-08-29 19:49:06,230 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 115 transitions, 1073 flow [2023-08-29 19:49:06,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 46.857142857142854) internal successors, (328), 7 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:06,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:49:06,231 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:49:06,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-29 19:49:06,231 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 19:49:06,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:49:06,231 INFO L85 PathProgramCache]: Analyzing trace with hash -753851545, now seen corresponding path program 1 times [2023-08-29 19:49:06,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:49:06,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658044322] [2023-08-29 19:49:06,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:49:06,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:49:06,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:49:06,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-29 19:49:06,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:49:06,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658044322] [2023-08-29 19:49:06,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658044322] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:49:06,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:49:06,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 19:49:06,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655612373] [2023-08-29 19:49:06,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:49:06,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 19:49:06,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:49:06,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 19:49:06,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-29 19:49:06,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 121 [2023-08-29 19:49:06,342 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 115 transitions, 1073 flow. Second operand has 7 states, 7 states have (on average 46.857142857142854) internal successors, (328), 7 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:06,342 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:49:06,343 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 121 [2023-08-29 19:49:06,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:49:06,664 INFO L130 PetriNetUnfolder]: 1032/1940 cut-off events. [2023-08-29 19:49:06,664 INFO L131 PetriNetUnfolder]: For 47671/47671 co-relation queries the response was YES. [2023-08-29 19:49:06,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15040 conditions, 1940 events. 1032/1940 cut-off events. For 47671/47671 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 12779 event pairs, 377 based on Foata normal form. 18/1955 useless extension candidates. Maximal degree in co-relation 14979. Up to 1133 conditions per place. [2023-08-29 19:49:06,677 INFO L137 encePairwiseOnDemand]: 113/121 looper letters, 114 selfloop transitions, 19 changer transitions 2/156 dead transitions. [2023-08-29 19:49:06,677 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 156 transitions, 1870 flow [2023-08-29 19:49:06,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 19:49:06,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 19:49:06,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 475 transitions. [2023-08-29 19:49:06,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361799816345271 [2023-08-29 19:49:06,678 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 475 transitions. [2023-08-29 19:49:06,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 475 transitions. [2023-08-29 19:49:06,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:49:06,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 475 transitions. [2023-08-29 19:49:06,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 52.77777777777778) internal successors, (475), 9 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:06,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 121.0) internal successors, (1210), 10 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:06,680 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 121.0) internal successors, (1210), 10 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:06,681 INFO L175 Difference]: Start difference. First operand has 169 places, 115 transitions, 1073 flow. Second operand 9 states and 475 transitions. [2023-08-29 19:49:06,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 156 transitions, 1870 flow [2023-08-29 19:49:06,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 156 transitions, 1809 flow, removed 12 selfloop flow, removed 7 redundant places. [2023-08-29 19:49:06,718 INFO L231 Difference]: Finished difference. Result has 171 places, 115 transitions, 1059 flow [2023-08-29 19:49:06,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1059, PETRI_PLACES=171, PETRI_TRANSITIONS=115} [2023-08-29 19:49:06,718 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2023-08-29 19:49:06,718 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 115 transitions, 1059 flow [2023-08-29 19:49:06,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 46.857142857142854) internal successors, (328), 7 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:06,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:49:06,719 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:49:06,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-29 19:49:06,719 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 19:49:06,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:49:06,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1227568299, now seen corresponding path program 1 times [2023-08-29 19:49:06,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:49:06,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812478613] [2023-08-29 19:49:06,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:49:06,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:49:06,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:49:06,820 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 19:49:06,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:49:06,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812478613] [2023-08-29 19:49:06,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812478613] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:49:06,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55331079] [2023-08-29 19:49:06,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:49:06,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:49:06,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:49:06,822 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:49:06,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-29 19:49:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:49:06,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-29 19:49:06,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:49:06,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 19:49:06,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:49:07,152 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 19:49:07,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55331079] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:49:07,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:49:07,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 20 [2023-08-29 19:49:07,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774114643] [2023-08-29 19:49:07,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:49:07,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-29 19:49:07,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:49:07,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-29 19:49:07,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2023-08-29 19:49:07,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 121 [2023-08-29 19:49:07,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 115 transitions, 1059 flow. Second operand has 22 states, 22 states have (on average 41.22727272727273) internal successors, (907), 22 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:07,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:49:07,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 121 [2023-08-29 19:49:07,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:49:09,896 INFO L130 PetriNetUnfolder]: 1202/2252 cut-off events. [2023-08-29 19:49:09,896 INFO L131 PetriNetUnfolder]: For 52470/52470 co-relation queries the response was YES. [2023-08-29 19:49:09,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17506 conditions, 2252 events. 1202/2252 cut-off events. For 52470/52470 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 15814 event pairs, 61 based on Foata normal form. 36/2287 useless extension candidates. Maximal degree in co-relation 17445. Up to 887 conditions per place. [2023-08-29 19:49:09,910 INFO L137 encePairwiseOnDemand]: 101/121 looper letters, 184 selfloop transitions, 95 changer transitions 64/346 dead transitions. [2023-08-29 19:49:09,910 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 346 transitions, 5148 flow [2023-08-29 19:49:09,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-08-29 19:49:09,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-08-29 19:49:09,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 2465 transitions. [2023-08-29 19:49:09,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3637839433293979 [2023-08-29 19:49:09,913 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 2465 transitions. [2023-08-29 19:49:09,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 2465 transitions. [2023-08-29 19:49:09,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:49:09,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 2465 transitions. [2023-08-29 19:49:09,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 44.017857142857146) internal successors, (2465), 56 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:09,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 121.0) internal successors, (6897), 57 states have internal predecessors, (6897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:09,922 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 121.0) internal successors, (6897), 57 states have internal predecessors, (6897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:09,922 INFO L175 Difference]: Start difference. First operand has 171 places, 115 transitions, 1059 flow. Second operand 56 states and 2465 transitions. [2023-08-29 19:49:09,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 346 transitions, 5148 flow [2023-08-29 19:49:09,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 346 transitions, 4968 flow, removed 74 selfloop flow, removed 7 redundant places. [2023-08-29 19:49:09,978 INFO L231 Difference]: Finished difference. Result has 231 places, 158 transitions, 2353 flow [2023-08-29 19:49:09,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=996, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=2353, PETRI_PLACES=231, PETRI_TRANSITIONS=158} [2023-08-29 19:49:09,979 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2023-08-29 19:49:09,979 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 158 transitions, 2353 flow [2023-08-29 19:49:09,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 41.22727272727273) internal successors, (907), 22 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:09,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:49:09,979 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:49:09,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-29 19:49:10,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:49:10,182 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 19:49:10,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:49:10,182 INFO L85 PathProgramCache]: Analyzing trace with hash 787305947, now seen corresponding path program 1 times [2023-08-29 19:49:10,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:49:10,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734509499] [2023-08-29 19:49:10,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:49:10,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:49:10,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:49:10,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 19:49:10,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:49:10,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734509499] [2023-08-29 19:49:10,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734509499] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:49:10,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657143993] [2023-08-29 19:49:10,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:49:10,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:49:10,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:49:10,287 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:49:10,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-29 19:49:10,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:49:10,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-29 19:49:10,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:49:10,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 19:49:10,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:49:10,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 19:49:10,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657143993] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:49:10,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:49:10,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 20 [2023-08-29 19:49:10,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055168706] [2023-08-29 19:49:10,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:49:10,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-29 19:49:10,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:49:10,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-29 19:49:10,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-08-29 19:49:10,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 121 [2023-08-29 19:49:10,692 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 158 transitions, 2353 flow. Second operand has 22 states, 22 states have (on average 41.36363636363637) internal successors, (910), 22 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:10,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:49:10,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 121 [2023-08-29 19:49:10,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:49:13,667 INFO L130 PetriNetUnfolder]: 1073/2133 cut-off events. [2023-08-29 19:49:13,667 INFO L131 PetriNetUnfolder]: For 62726/62726 co-relation queries the response was YES. [2023-08-29 19:49:13,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18924 conditions, 2133 events. 1073/2133 cut-off events. For 62726/62726 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 15957 event pairs, 40 based on Foata normal form. 36/2168 useless extension candidates. Maximal degree in co-relation 18851. Up to 881 conditions per place. [2023-08-29 19:49:13,682 INFO L137 encePairwiseOnDemand]: 101/121 looper letters, 153 selfloop transitions, 121 changer transitions 83/360 dead transitions. [2023-08-29 19:49:13,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 360 transitions, 6521 flow [2023-08-29 19:49:13,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-08-29 19:49:13,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-08-29 19:49:13,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 2398 transitions. [2023-08-29 19:49:13,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3603305785123967 [2023-08-29 19:49:13,685 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 2398 transitions. [2023-08-29 19:49:13,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 2398 transitions. [2023-08-29 19:49:13,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:49:13,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 2398 transitions. [2023-08-29 19:49:13,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 43.6) internal successors, (2398), 55 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:13,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 121.0) internal successors, (6776), 56 states have internal predecessors, (6776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:13,693 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 121.0) internal successors, (6776), 56 states have internal predecessors, (6776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:13,693 INFO L175 Difference]: Start difference. First operand has 231 places, 158 transitions, 2353 flow. Second operand 55 states and 2398 transitions. [2023-08-29 19:49:13,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 360 transitions, 6521 flow [2023-08-29 19:49:13,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 360 transitions, 4797 flow, removed 813 selfloop flow, removed 26 redundant places. [2023-08-29 19:49:13,832 INFO L231 Difference]: Finished difference. Result has 253 places, 186 transitions, 2667 flow [2023-08-29 19:49:13,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=1487, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=2667, PETRI_PLACES=253, PETRI_TRANSITIONS=186} [2023-08-29 19:49:13,833 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2023-08-29 19:49:13,833 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 186 transitions, 2667 flow [2023-08-29 19:49:13,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 41.36363636363637) internal successors, (910), 22 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:13,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:49:13,834 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:49:13,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-29 19:49:14,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:49:14,038 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 19:49:14,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:49:14,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1015577457, now seen corresponding path program 2 times [2023-08-29 19:49:14,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:49:14,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155537524] [2023-08-29 19:49:14,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:49:14,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:49:14,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:49:14,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-29 19:49:14,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:49:14,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155537524] [2023-08-29 19:49:14,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155537524] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:49:14,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:49:14,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-29 19:49:14,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145064672] [2023-08-29 19:49:14,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:49:14,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 19:49:14,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:49:14,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 19:49:14,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-08-29 19:49:14,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 121 [2023-08-29 19:49:14,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 186 transitions, 2667 flow. Second operand has 9 states, 9 states have (on average 44.888888888888886) internal successors, (404), 9 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:14,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:49:14,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 121 [2023-08-29 19:49:14,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:49:14,526 INFO L130 PetriNetUnfolder]: 750/1587 cut-off events. [2023-08-29 19:49:14,527 INFO L131 PetriNetUnfolder]: For 31308/31314 co-relation queries the response was YES. [2023-08-29 19:49:14,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12361 conditions, 1587 events. 750/1587 cut-off events. For 31308/31314 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 12029 event pairs, 120 based on Foata normal form. 48/1634 useless extension candidates. Maximal degree in co-relation 12291. Up to 693 conditions per place. [2023-08-29 19:49:14,536 INFO L137 encePairwiseOnDemand]: 111/121 looper letters, 142 selfloop transitions, 12 changer transitions 38/208 dead transitions. [2023-08-29 19:49:14,536 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 208 transitions, 3378 flow [2023-08-29 19:49:14,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 19:49:14,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 19:49:14,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 500 transitions. [2023-08-29 19:49:14,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4132231404958678 [2023-08-29 19:49:14,538 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 500 transitions. [2023-08-29 19:49:14,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 500 transitions. [2023-08-29 19:49:14,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:49:14,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 500 transitions. [2023-08-29 19:49:14,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 50.0) internal successors, (500), 10 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:14,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 121.0) internal successors, (1331), 11 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:14,540 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 121.0) internal successors, (1331), 11 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:14,540 INFO L175 Difference]: Start difference. First operand has 253 places, 186 transitions, 2667 flow. Second operand 10 states and 500 transitions. [2023-08-29 19:49:14,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 208 transitions, 3378 flow [2023-08-29 19:49:14,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 208 transitions, 2384 flow, removed 394 selfloop flow, removed 29 redundant places. [2023-08-29 19:49:14,617 INFO L231 Difference]: Finished difference. Result has 204 places, 158 transitions, 1583 flow [2023-08-29 19:49:14,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=1784, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1583, PETRI_PLACES=204, PETRI_TRANSITIONS=158} [2023-08-29 19:49:14,617 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2023-08-29 19:49:14,618 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 158 transitions, 1583 flow [2023-08-29 19:49:14,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 44.888888888888886) internal successors, (404), 9 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:14,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:49:14,618 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:49:14,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-29 19:49:14,618 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 19:49:14,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:49:14,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1828019725, now seen corresponding path program 1 times [2023-08-29 19:49:14,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:49:14,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479547206] [2023-08-29 19:49:14,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:49:14,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:49:14,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:49:14,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-29 19:49:14,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:49:14,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479547206] [2023-08-29 19:49:14,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479547206] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:49:14,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:49:14,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-29 19:49:14,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053958579] [2023-08-29 19:49:14,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:49:14,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 19:49:14,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:49:14,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 19:49:14,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-08-29 19:49:14,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 121 [2023-08-29 19:49:14,767 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 158 transitions, 1583 flow. Second operand has 9 states, 9 states have (on average 44.888888888888886) internal successors, (404), 9 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:14,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:49:14,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 121 [2023-08-29 19:49:14,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:49:14,986 INFO L130 PetriNetUnfolder]: 504/1081 cut-off events. [2023-08-29 19:49:14,986 INFO L131 PetriNetUnfolder]: For 10515/10515 co-relation queries the response was YES. [2023-08-29 19:49:14,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6606 conditions, 1081 events. 504/1081 cut-off events. For 10515/10515 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 7640 event pairs, 74 based on Foata normal form. 36/1114 useless extension candidates. Maximal degree in co-relation 6552. Up to 693 conditions per place. [2023-08-29 19:49:14,991 INFO L137 encePairwiseOnDemand]: 111/121 looper letters, 90 selfloop transitions, 9 changer transitions 51/162 dead transitions. [2023-08-29 19:49:14,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 162 transitions, 1867 flow [2023-08-29 19:49:14,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 19:49:14,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 19:49:14,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 487 transitions. [2023-08-29 19:49:14,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024793388429752 [2023-08-29 19:49:14,993 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 487 transitions. [2023-08-29 19:49:14,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 487 transitions. [2023-08-29 19:49:14,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:49:14,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 487 transitions. [2023-08-29 19:49:14,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 48.7) internal successors, (487), 10 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:14,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 121.0) internal successors, (1331), 11 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:14,995 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 121.0) internal successors, (1331), 11 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:14,995 INFO L175 Difference]: Start difference. First operand has 204 places, 158 transitions, 1583 flow. Second operand 10 states and 487 transitions. [2023-08-29 19:49:14,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 162 transitions, 1867 flow [2023-08-29 19:49:15,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 162 transitions, 1754 flow, removed 35 selfloop flow, removed 15 redundant places. [2023-08-29 19:49:15,018 INFO L231 Difference]: Finished difference. Result has 171 places, 105 transitions, 1003 flow [2023-08-29 19:49:15,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=1348, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1003, PETRI_PLACES=171, PETRI_TRANSITIONS=105} [2023-08-29 19:49:15,018 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2023-08-29 19:49:15,018 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 105 transitions, 1003 flow [2023-08-29 19:49:15,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 44.888888888888886) internal successors, (404), 9 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:15,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:49:15,019 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:49:15,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-29 19:49:15,019 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 19:49:15,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:49:15,019 INFO L85 PathProgramCache]: Analyzing trace with hash -135454325, now seen corresponding path program 2 times [2023-08-29 19:49:15,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:49:15,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658360999] [2023-08-29 19:49:15,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:49:15,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:49:15,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:49:15,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-29 19:49:15,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:49:15,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658360999] [2023-08-29 19:49:15,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658360999] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:49:15,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:49:15,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-29 19:49:15,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631172878] [2023-08-29 19:49:15,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:49:15,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 19:49:15,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:49:15,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 19:49:15,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-08-29 19:49:15,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 121 [2023-08-29 19:49:15,197 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 105 transitions, 1003 flow. Second operand has 9 states, 9 states have (on average 44.888888888888886) internal successors, (404), 9 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:15,197 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:49:15,197 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 121 [2023-08-29 19:49:15,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:49:15,364 INFO L130 PetriNetUnfolder]: 313/680 cut-off events. [2023-08-29 19:49:15,365 INFO L131 PetriNetUnfolder]: For 4201/4201 co-relation queries the response was YES. [2023-08-29 19:49:15,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3729 conditions, 680 events. 313/680 cut-off events. For 4201/4201 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 4327 event pairs, 44 based on Foata normal form. 32/710 useless extension candidates. Maximal degree in co-relation 3681. Up to 392 conditions per place. [2023-08-29 19:49:15,367 INFO L137 encePairwiseOnDemand]: 112/121 looper letters, 55 selfloop transitions, 4 changer transitions 42/108 dead transitions. [2023-08-29 19:49:15,367 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 108 transitions, 1164 flow [2023-08-29 19:49:15,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 19:49:15,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 19:49:15,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 478 transitions. [2023-08-29 19:49:15,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3950413223140496 [2023-08-29 19:49:15,368 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 478 transitions. [2023-08-29 19:49:15,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 478 transitions. [2023-08-29 19:49:15,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:49:15,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 478 transitions. [2023-08-29 19:49:15,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 47.8) internal successors, (478), 10 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:15,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 121.0) internal successors, (1331), 11 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:15,370 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 121.0) internal successors, (1331), 11 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:15,370 INFO L175 Difference]: Start difference. First operand has 171 places, 105 transitions, 1003 flow. Second operand 10 states and 478 transitions. [2023-08-29 19:49:15,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 108 transitions, 1164 flow [2023-08-29 19:49:15,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 108 transitions, 1020 flow, removed 28 selfloop flow, removed 26 redundant places. [2023-08-29 19:49:15,378 INFO L231 Difference]: Finished difference. Result has 127 places, 63 transitions, 473 flow [2023-08-29 19:49:15,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=729, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=473, PETRI_PLACES=127, PETRI_TRANSITIONS=63} [2023-08-29 19:49:15,378 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2023-08-29 19:49:15,379 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 63 transitions, 473 flow [2023-08-29 19:49:15,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 44.888888888888886) internal successors, (404), 9 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:15,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:49:15,379 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:49:15,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-29 19:49:15,379 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 19:49:15,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:49:15,379 INFO L85 PathProgramCache]: Analyzing trace with hash 236725591, now seen corresponding path program 2 times [2023-08-29 19:49:15,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:49:15,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493024805] [2023-08-29 19:49:15,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:49:15,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:49:15,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:49:15,479 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-29 19:49:15,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:49:15,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493024805] [2023-08-29 19:49:15,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493024805] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:49:15,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:49:15,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-29 19:49:15,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115062084] [2023-08-29 19:49:15,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:49:15,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 19:49:15,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:49:15,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 19:49:15,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-08-29 19:49:15,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 121 [2023-08-29 19:49:15,532 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 63 transitions, 473 flow. Second operand has 9 states, 9 states have (on average 44.888888888888886) internal successors, (404), 9 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:15,532 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:49:15,532 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 121 [2023-08-29 19:49:15,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:49:15,652 INFO L130 PetriNetUnfolder]: 149/344 cut-off events. [2023-08-29 19:49:15,652 INFO L131 PetriNetUnfolder]: For 1081/1081 co-relation queries the response was YES. [2023-08-29 19:49:15,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1724 conditions, 344 events. 149/344 cut-off events. For 1081/1081 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 1796 event pairs, 18 based on Foata normal form. 42/386 useless extension candidates. Maximal degree in co-relation 1693. Up to 164 conditions per place. [2023-08-29 19:49:15,653 INFO L137 encePairwiseOnDemand]: 112/121 looper letters, 0 selfloop transitions, 0 changer transitions 66/66 dead transitions. [2023-08-29 19:49:15,653 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 66 transitions, 582 flow [2023-08-29 19:49:15,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 19:49:15,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 19:49:15,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 421 transitions. [2023-08-29 19:49:15,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38659320477502296 [2023-08-29 19:49:15,654 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 421 transitions. [2023-08-29 19:49:15,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 421 transitions. [2023-08-29 19:49:15,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:49:15,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 421 transitions. [2023-08-29 19:49:15,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 46.77777777777778) internal successors, (421), 9 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:15,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 121.0) internal successors, (1210), 10 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:15,656 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 121.0) internal successors, (1210), 10 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:15,656 INFO L175 Difference]: Start difference. First operand has 127 places, 63 transitions, 473 flow. Second operand 9 states and 421 transitions. [2023-08-29 19:49:15,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 66 transitions, 582 flow [2023-08-29 19:49:15,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 66 transitions, 445 flow, removed 26 selfloop flow, removed 25 redundant places. [2023-08-29 19:49:15,659 INFO L231 Difference]: Finished difference. Result has 88 places, 0 transitions, 0 flow [2023-08-29 19:49:15,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=88, PETRI_TRANSITIONS=0} [2023-08-29 19:49:15,659 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2023-08-29 19:49:15,659 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 0 transitions, 0 flow [2023-08-29 19:49:15,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 44.888888888888886) internal successors, (404), 9 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:15,659 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 7 remaining) [2023-08-29 19:49:15,659 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (5 of 7 remaining) [2023-08-29 19:49:15,659 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 7 remaining) [2023-08-29 19:49:15,660 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 7 remaining) [2023-08-29 19:49:15,660 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 7 remaining) [2023-08-29 19:49:15,660 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-29 19:49:15,660 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 7 remaining) [2023-08-29 19:49:15,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-29 19:49:15,660 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:49:15,660 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 19:49:15,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 76 transitions, 173 flow [2023-08-29 19:49:15,666 INFO L130 PetriNetUnfolder]: 7/125 cut-off events. [2023-08-29 19:49:15,666 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 19:49:15,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 125 events. 7/125 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 321 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 97. Up to 8 conditions per place. [2023-08-29 19:49:15,666 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 76 transitions, 173 flow [2023-08-29 19:49:15,667 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 76 transitions, 173 flow [2023-08-29 19:49:15,667 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:49:15,667 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 76 transitions, 173 flow [2023-08-29 19:49:15,667 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 79 places, 76 transitions, 173 flow [2023-08-29 19:49:15,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 76 transitions, 173 flow [2023-08-29 19:49:15,672 INFO L130 PetriNetUnfolder]: 7/125 cut-off events. [2023-08-29 19:49:15,672 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 19:49:15,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 125 events. 7/125 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 321 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 97. Up to 8 conditions per place. [2023-08-29 19:49:15,673 INFO L119 LiptonReduction]: Number of co-enabled transitions 2772 [2023-08-29 19:49:16,586 INFO L134 LiptonReduction]: Checked pairs total: 10276 [2023-08-29 19:49:16,586 INFO L136 LiptonReduction]: Total number of compositions: 45 [2023-08-29 19:49:16,587 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 19:49:16,587 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;@14ce192b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:49:16,587 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 19:49:16,590 INFO L130 PetriNetUnfolder]: 2/53 cut-off events. [2023-08-29 19:49:16,590 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 19:49:16,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:49:16,590 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-29 19:49:16,590 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 19:49:16,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:49:16,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1212576443, now seen corresponding path program 1 times [2023-08-29 19:49:16,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:49:16,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083462646] [2023-08-29 19:49:16,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:49:16,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:49:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:49:16,595 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 19:49:16,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:49:16,610 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 19:49:16,610 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 19:49:16,610 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 19:49:16,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-29 19:49:16,611 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 19:49:16,611 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 19:49:16,611 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 19:49:16,611 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-29 19:49:16,621 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 19:49:16,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 91 transitions, 214 flow [2023-08-29 19:49:16,628 INFO L130 PetriNetUnfolder]: 9/157 cut-off events. [2023-08-29 19:49:16,628 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-29 19:49:16,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 157 events. 9/157 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 407 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 133. Up to 10 conditions per place. [2023-08-29 19:49:16,629 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 91 transitions, 214 flow [2023-08-29 19:49:16,629 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 91 transitions, 214 flow [2023-08-29 19:49:16,629 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:49:16,630 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 91 transitions, 214 flow [2023-08-29 19:49:16,630 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 91 transitions, 214 flow [2023-08-29 19:49:16,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 91 transitions, 214 flow [2023-08-29 19:49:16,635 INFO L130 PetriNetUnfolder]: 9/157 cut-off events. [2023-08-29 19:49:16,635 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-29 19:49:16,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 157 events. 9/157 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 407 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 133. Up to 10 conditions per place. [2023-08-29 19:49:16,638 INFO L119 LiptonReduction]: Number of co-enabled transitions 4536 [2023-08-29 19:49:17,729 INFO L134 LiptonReduction]: Checked pairs total: 16958 [2023-08-29 19:49:17,729 INFO L136 LiptonReduction]: Total number of compositions: 51 [2023-08-29 19:49:17,730 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 19:49:17,731 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;@14ce192b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:49:17,731 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-29 19:49:17,731 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 19:49:17,731 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:49:17,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:49:17,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 19:49:17,732 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2023-08-29 19:49:17,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:49:17,732 INFO L85 PathProgramCache]: Analyzing trace with hash 25561, now seen corresponding path program 1 times [2023-08-29 19:49:17,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:49:17,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764644864] [2023-08-29 19:49:17,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:49:17,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:49:17,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:49:17,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:49:17,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:49:17,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764644864] [2023-08-29 19:49:17,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764644864] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:49:17,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:49:17,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:49:17,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360643424] [2023-08-29 19:49:17,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:49:17,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 19:49:17,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:49:17,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 19:49:17,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 19:49:17,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 142 [2023-08-29 19:49:17,739 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 130 flow. Second operand has 2 states, 2 states have (on average 66.0) internal successors, (132), 2 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:17,739 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:49:17,739 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 142 [2023-08-29 19:49:17,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:49:18,539 INFO L130 PetriNetUnfolder]: 11096/16570 cut-off events. [2023-08-29 19:49:18,540 INFO L131 PetriNetUnfolder]: For 1921/1921 co-relation queries the response was YES. [2023-08-29 19:49:18,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31938 conditions, 16570 events. 11096/16570 cut-off events. For 1921/1921 co-relation queries the response was YES. Maximal size of possible extension queue 909. Compared 117950 event pairs, 8752 based on Foata normal form. 0/11828 useless extension candidates. Maximal degree in co-relation 5138. Up to 14221 conditions per place. [2023-08-29 19:49:18,614 INFO L137 encePairwiseOnDemand]: 140/142 looper letters, 28 selfloop transitions, 0 changer transitions 0/47 dead transitions. [2023-08-29 19:49:18,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 47 transitions, 182 flow [2023-08-29 19:49:18,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 19:49:18,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 19:49:18,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 160 transitions. [2023-08-29 19:49:18,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5633802816901409 [2023-08-29 19:49:18,615 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 160 transitions. [2023-08-29 19:49:18,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 160 transitions. [2023-08-29 19:49:18,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:49:18,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 160 transitions. [2023-08-29 19:49:18,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:18,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:18,616 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:18,616 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 130 flow. Second operand 2 states and 160 transitions. [2023-08-29 19:49:18,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 47 transitions, 182 flow [2023-08-29 19:49:18,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 47 transitions, 170 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-29 19:49:18,618 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 114 flow [2023-08-29 19:49:18,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=114, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2023-08-29 19:49:18,619 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2023-08-29 19:49:18,619 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 114 flow [2023-08-29 19:49:18,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 66.0) internal successors, (132), 2 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:18,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:49:18,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 19:49:18,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-08-29 19:49:18,620 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2023-08-29 19:49:18,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:49:18,620 INFO L85 PathProgramCache]: Analyzing trace with hash 25567, now seen corresponding path program 1 times [2023-08-29 19:49:18,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:49:18,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263019834] [2023-08-29 19:49:18,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:49:18,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:49:18,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:49:18,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:49:18,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:49:18,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263019834] [2023-08-29 19:49:18,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263019834] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:49:18,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:49:18,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:49:18,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792662452] [2023-08-29 19:49:18,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:49:18,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:49:18,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:49:18,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:49:18,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:49:18,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 142 [2023-08-29 19:49:18,656 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:18,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:49:18,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 142 [2023-08-29 19:49:18,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:49:19,288 INFO L130 PetriNetUnfolder]: 8166/12359 cut-off events. [2023-08-29 19:49:19,288 INFO L131 PetriNetUnfolder]: For 415/415 co-relation queries the response was YES. [2023-08-29 19:49:19,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23442 conditions, 12359 events. 8166/12359 cut-off events. For 415/415 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 85799 event pairs, 6408 based on Foata normal form. 0/9140 useless extension candidates. Maximal degree in co-relation 23435. Up to 10509 conditions per place. [2023-08-29 19:49:19,334 INFO L137 encePairwiseOnDemand]: 140/142 looper letters, 26 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-08-29 19:49:19,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 46 transitions, 166 flow [2023-08-29 19:49:19,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:49:19,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:49:19,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 208 transitions. [2023-08-29 19:49:19,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48826291079812206 [2023-08-29 19:49:19,335 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 208 transitions. [2023-08-29 19:49:19,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 208 transitions. [2023-08-29 19:49:19,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:49:19,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 208 transitions. [2023-08-29 19:49:19,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:19,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:19,336 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:19,336 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 114 flow. Second operand 3 states and 208 transitions. [2023-08-29 19:49:19,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 46 transitions, 166 flow [2023-08-29 19:49:19,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 46 transitions, 166 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:49:19,337 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 114 flow [2023-08-29 19:49:19,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2023-08-29 19:49:19,338 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 0 predicate places. [2023-08-29 19:49:19,338 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 114 flow [2023-08-29 19:49:19,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:19,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:49:19,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 19:49:19,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-08-29 19:49:19,338 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2023-08-29 19:49:19,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:49:19,338 INFO L85 PathProgramCache]: Analyzing trace with hash 25566, now seen corresponding path program 1 times [2023-08-29 19:49:19,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:49:19,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910916838] [2023-08-29 19:49:19,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:49:19,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:49:19,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:49:19,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:49:19,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:49:19,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910916838] [2023-08-29 19:49:19,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910916838] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:49:19,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:49:19,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:49:19,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416706646] [2023-08-29 19:49:19,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:49:19,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:49:19,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:49:19,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:49:19,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:49:19,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 142 [2023-08-29 19:49:19,362 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:19,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:49:19,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 142 [2023-08-29 19:49:19,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:49:19,692 INFO L130 PetriNetUnfolder]: 5236/8148 cut-off events. [2023-08-29 19:49:19,692 INFO L131 PetriNetUnfolder]: For 415/415 co-relation queries the response was YES. [2023-08-29 19:49:19,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15522 conditions, 8148 events. 5236/8148 cut-off events. For 415/415 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 54625 event pairs, 4064 based on Foata normal form. 0/6452 useless extension candidates. Maximal degree in co-relation 15514. Up to 6798 conditions per place. [2023-08-29 19:49:19,722 INFO L137 encePairwiseOnDemand]: 140/142 looper letters, 25 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-08-29 19:49:19,722 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 45 transitions, 164 flow [2023-08-29 19:49:19,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:49:19,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:49:19,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 204 transitions. [2023-08-29 19:49:19,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4788732394366197 [2023-08-29 19:49:19,723 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 204 transitions. [2023-08-29 19:49:19,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 204 transitions. [2023-08-29 19:49:19,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:49:19,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 204 transitions. [2023-08-29 19:49:19,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:19,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:19,724 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:19,724 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 114 flow. Second operand 3 states and 204 transitions. [2023-08-29 19:49:19,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 45 transitions, 164 flow [2023-08-29 19:49:19,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 45 transitions, 163 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:49:19,725 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 113 flow [2023-08-29 19:49:19,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2023-08-29 19:49:19,725 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 0 predicate places. [2023-08-29 19:49:19,725 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 113 flow [2023-08-29 19:49:19,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:19,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:49:19,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:49:19,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-08-29 19:49:19,725 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2023-08-29 19:49:19,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:49:19,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1450352332, now seen corresponding path program 1 times [2023-08-29 19:49:19,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:49:19,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016124525] [2023-08-29 19:49:19,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:49:19,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:49:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:49:19,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:49:19,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:49:19,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016124525] [2023-08-29 19:49:19,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016124525] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:49:19,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:49:19,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:49:19,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173441979] [2023-08-29 19:49:19,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:49:19,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:49:19,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:49:19,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:49:19,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:49:19,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 142 [2023-08-29 19:49:19,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 113 flow. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:19,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:49:19,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 142 [2023-08-29 19:49:19,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:49:22,434 INFO L130 PetriNetUnfolder]: 38126/50056 cut-off events. [2023-08-29 19:49:22,434 INFO L131 PetriNetUnfolder]: For 2284/2284 co-relation queries the response was YES. [2023-08-29 19:49:22,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102342 conditions, 50056 events. 38126/50056 cut-off events. For 2284/2284 co-relation queries the response was YES. Maximal size of possible extension queue 2574. Compared 300991 event pairs, 13503 based on Foata normal form. 132/43544 useless extension candidates. Maximal degree in co-relation 102334. Up to 22160 conditions per place. [2023-08-29 19:49:22,642 INFO L137 encePairwiseOnDemand]: 130/142 looper letters, 97 selfloop transitions, 15 changer transitions 0/122 dead transitions. [2023-08-29 19:49:22,642 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 122 transitions, 541 flow [2023-08-29 19:49:22,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 19:49:22,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 19:49:22,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 444 transitions. [2023-08-29 19:49:22,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5211267605633803 [2023-08-29 19:49:22,644 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 444 transitions. [2023-08-29 19:49:22,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 444 transitions. [2023-08-29 19:49:22,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:49:22,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 444 transitions. [2023-08-29 19:49:22,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:22,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 142.0) internal successors, (994), 7 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:22,646 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 142.0) internal successors, (994), 7 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:22,646 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 113 flow. Second operand 6 states and 444 transitions. [2023-08-29 19:49:22,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 122 transitions, 541 flow [2023-08-29 19:49:22,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 122 transitions, 540 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:49:22,648 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 230 flow [2023-08-29 19:49:22,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=230, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2023-08-29 19:49:22,648 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 8 predicate places. [2023-08-29 19:49:22,649 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 230 flow [2023-08-29 19:49:22,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:22,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:49:22,649 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:49:22,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-08-29 19:49:22,649 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2023-08-29 19:49:22,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:49:22,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1411497629, now seen corresponding path program 1 times [2023-08-29 19:49:22,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:49:22,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38385516] [2023-08-29 19:49:22,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:49:22,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:49:22,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:49:22,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 19:49:22,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:49:22,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38385516] [2023-08-29 19:49:22,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38385516] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:49:22,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:49:22,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:49:22,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495733561] [2023-08-29 19:49:22,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:49:22,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:49:22,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:49:22,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:49:22,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:49:22,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 142 [2023-08-29 19:49:22,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 230 flow. Second operand has 5 states, 5 states have (on average 55.8) internal successors, (279), 5 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:22,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:49:22,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 142 [2023-08-29 19:49:22,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:49:27,842 INFO L130 PetriNetUnfolder]: 72724/96946 cut-off events. [2023-08-29 19:49:27,842 INFO L131 PetriNetUnfolder]: For 45565/46013 co-relation queries the response was YES. [2023-08-29 19:49:28,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231616 conditions, 96946 events. 72724/96946 cut-off events. For 45565/46013 co-relation queries the response was YES. Maximal size of possible extension queue 5143. Compared 660193 event pairs, 26615 based on Foata normal form. 426/86754 useless extension candidates. Maximal degree in co-relation 231604. Up to 44665 conditions per place. [2023-08-29 19:49:28,487 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 108 selfloop transitions, 25 changer transitions 0/144 dead transitions. [2023-08-29 19:49:28,487 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 144 transitions, 803 flow [2023-08-29 19:49:28,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 19:49:28,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 19:49:28,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 436 transitions. [2023-08-29 19:49:28,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5117370892018779 [2023-08-29 19:49:28,488 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 436 transitions. [2023-08-29 19:49:28,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 436 transitions. [2023-08-29 19:49:28,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:49:28,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 436 transitions. [2023-08-29 19:49:28,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 72.66666666666667) internal successors, (436), 6 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:28,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 142.0) internal successors, (994), 7 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:28,490 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 142.0) internal successors, (994), 7 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:28,490 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 230 flow. Second operand 6 states and 436 transitions. [2023-08-29 19:49:28,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 144 transitions, 803 flow [2023-08-29 19:49:28,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 144 transitions, 803 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:49:28,519 INFO L231 Difference]: Finished difference. Result has 69 places, 77 transitions, 401 flow [2023-08-29 19:49:28,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=401, PETRI_PLACES=69, PETRI_TRANSITIONS=77} [2023-08-29 19:49:28,520 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 15 predicate places. [2023-08-29 19:49:28,520 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 77 transitions, 401 flow [2023-08-29 19:49:28,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.8) internal successors, (279), 5 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:28,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:49:28,520 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:49:28,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-08-29 19:49:28,520 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2023-08-29 19:49:28,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:49:28,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1246864000, now seen corresponding path program 1 times [2023-08-29 19:49:28,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:49:28,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485962463] [2023-08-29 19:49:28,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:49:28,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:49:28,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:49:28,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-29 19:49:28,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:49:28,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485962463] [2023-08-29 19:49:28,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485962463] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:49:28,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:49:28,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:49:28,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501961523] [2023-08-29 19:49:28,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:49:28,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:49:28,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:49:28,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:49:28,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:49:28,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 142 [2023-08-29 19:49:28,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 77 transitions, 401 flow. Second operand has 5 states, 5 states have (on average 56.0) internal successors, (280), 5 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:28,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:49:28,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 142 [2023-08-29 19:49:28,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:49:38,610 INFO L130 PetriNetUnfolder]: 123863/167541 cut-off events. [2023-08-29 19:49:38,610 INFO L131 PetriNetUnfolder]: For 130047/133087 co-relation queries the response was YES. [2023-08-29 19:49:39,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 425198 conditions, 167541 events. 123863/167541 cut-off events. For 130047/133087 co-relation queries the response was YES. Maximal size of possible extension queue 9040. Compared 1264131 event pairs, 45067 based on Foata normal form. 2956/157399 useless extension candidates. Maximal degree in co-relation 425183. Up to 80186 conditions per place. [2023-08-29 19:49:39,563 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 121 selfloop transitions, 37 changer transitions 0/170 dead transitions. [2023-08-29 19:49:39,563 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 170 transitions, 1173 flow [2023-08-29 19:49:39,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 19:49:39,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 19:49:39,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 433 transitions. [2023-08-29 19:49:39,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5082159624413145 [2023-08-29 19:49:39,564 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 433 transitions. [2023-08-29 19:49:39,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 433 transitions. [2023-08-29 19:49:39,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:49:39,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 433 transitions. [2023-08-29 19:49:39,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 72.16666666666667) internal successors, (433), 6 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:39,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 142.0) internal successors, (994), 7 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:39,566 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 142.0) internal successors, (994), 7 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:39,566 INFO L175 Difference]: Start difference. First operand has 69 places, 77 transitions, 401 flow. Second operand 6 states and 433 transitions. [2023-08-29 19:49:39,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 170 transitions, 1173 flow [2023-08-29 19:49:39,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 170 transitions, 1173 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:49:39,675 INFO L231 Difference]: Finished difference. Result has 76 places, 100 transitions, 703 flow [2023-08-29 19:49:39,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=703, PETRI_PLACES=76, PETRI_TRANSITIONS=100} [2023-08-29 19:49:39,676 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 22 predicate places. [2023-08-29 19:49:39,676 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 100 transitions, 703 flow [2023-08-29 19:49:39,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 56.0) internal successors, (280), 5 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:39,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:49:39,676 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:49:39,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-08-29 19:49:39,677 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2023-08-29 19:49:39,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:49:39,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1559019152, now seen corresponding path program 1 times [2023-08-29 19:49:39,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:49:39,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278102742] [2023-08-29 19:49:39,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:49:39,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:49:39,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:49:39,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:49:39,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:49:39,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278102742] [2023-08-29 19:49:39,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278102742] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:49:39,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119563064] [2023-08-29 19:49:39,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:49:39,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:49:39,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:49:39,769 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:49:39,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-29 19:49:39,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:49:39,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-29 19:49:39,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:49:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:49:39,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:49:39,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:49:39,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119563064] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:49:39,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:49:39,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2023-08-29 19:49:39,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233339700] [2023-08-29 19:49:39,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:49:39,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 19:49:39,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:49:39,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 19:49:39,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-08-29 19:49:40,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 142 [2023-08-29 19:49:40,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 100 transitions, 703 flow. Second operand has 15 states, 15 states have (on average 49.266666666666666) internal successors, (739), 15 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:40,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:49:40,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 142 [2023-08-29 19:49:40,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand