./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread/stack_longer-2.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/stack_longer-2.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 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 --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 19:42:40,110 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 19:42:40,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 19:42:40,154 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 19:42:40,154 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 19:42:40,157 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 19:42:40,159 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 19:42:40,161 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 19:42:40,164 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 19:42:40,168 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 19:42:40,169 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 19:42:40,172 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 19:42:40,172 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 19:42:40,174 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 19:42:40,175 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 19:42:40,178 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 19:42:40,179 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 19:42:40,181 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 19:42:40,182 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 19:42:40,187 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 19:42:40,195 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 19:42:40,196 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 19:42:40,197 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 19:42:40,198 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 19:42:40,204 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 19:42:40,204 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 19:42:40,205 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 19:42:40,207 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 19:42:40,207 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 19:42:40,208 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 19:42:40,208 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 19:42:40,210 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 19:42:40,211 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 19:42:40,212 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 19:42:40,213 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 19:42:40,213 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 19:42:40,213 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 19:42:40,214 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 19:42:40,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 19:42:40,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 19:42:40,215 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 19:42:40,217 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 19:42:40,250 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 19:42:40,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 19:42:40,251 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 19:42:40,251 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 19:42:40,252 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 19:42:40,252 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 19:42:40,253 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 19:42:40,253 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 19:42:40,253 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 19:42:40,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 19:42:40,254 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 19:42:40,254 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 19:42:40,255 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 19:42:40,255 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 19:42:40,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 19:42:40,255 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 19:42:40,255 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 19:42:40,256 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 19:42:40,256 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 19:42:40,256 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 19:42:40,256 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 19:42:40,256 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 19:42:40,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 19:42:40,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 19:42:40,257 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 19:42:40,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:42:40,257 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 19:42:40,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 19:42:40,258 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 19:42:40,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 19:42:40,258 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 19:42:40,258 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 19:42:40,259 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 19:42:40,259 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 19:42:40,259 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 19:42:40,531 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 19:42:40,553 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 19:42:40,556 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 19:42:40,557 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 19:42:40,557 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 19:42:40,558 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longer-2.i [2023-08-29 19:42:41,836 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 19:42:42,109 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 19:42:42,110 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-2.i [2023-08-29 19:42:42,132 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f3ced529/972039e1174843e19f4ea5386bbfdc19/FLAG1c3e878d8 [2023-08-29 19:42:42,152 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f3ced529/972039e1174843e19f4ea5386bbfdc19 [2023-08-29 19:42:42,154 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 19:42:42,155 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 19:42:42,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 19:42:42,156 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 19:42:42,159 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 19:42:42,160 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:42:42" (1/1) ... [2023-08-29 19:42:42,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d37aa34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:42, skipping insertion in model container [2023-08-29 19:42:42,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:42:42" (1/1) ... [2023-08-29 19:42:42,167 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 19:42:42,221 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 19:42:42,567 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/stack_longer-2.i[41529,41542] [2023-08-29 19:42:42,593 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:42:42,605 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 19:42:42,684 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/stack_longer-2.i[41529,41542] [2023-08-29 19:42:42,693 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:42:42,759 INFO L208 MainTranslator]: Completed translation [2023-08-29 19:42:42,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:42 WrapperNode [2023-08-29 19:42:42,759 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 19:42:42,761 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 19:42:42,761 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 19:42:42,761 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 19:42:42,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:42" (1/1) ... [2023-08-29 19:42:42,796 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:42" (1/1) ... [2023-08-29 19:42:42,835 INFO L138 Inliner]: procedures = 277, calls = 38, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 149 [2023-08-29 19:42:42,835 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 19:42:42,836 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 19:42:42,837 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 19:42:42,837 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 19:42:42,844 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:42" (1/1) ... [2023-08-29 19:42:42,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:42" (1/1) ... [2023-08-29 19:42:42,863 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:42" (1/1) ... [2023-08-29 19:42:42,864 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:42" (1/1) ... [2023-08-29 19:42:42,870 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:42" (1/1) ... [2023-08-29 19:42:42,882 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:42" (1/1) ... [2023-08-29 19:42:42,883 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:42" (1/1) ... [2023-08-29 19:42:42,892 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:42" (1/1) ... [2023-08-29 19:42:42,895 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 19:42:42,895 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 19:42:42,896 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 19:42:42,896 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 19:42:42,896 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:42" (1/1) ... [2023-08-29 19:42:42,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:42:42,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:42:42,934 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 19:42:42,953 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 19:42:42,982 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-29 19:42:42,982 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-29 19:42:42,982 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-29 19:42:42,982 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-29 19:42:42,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 19:42:42,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 19:42:42,983 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 19:42:42,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 19:42:42,983 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 19:42:42,983 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 19:42:42,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 19:42:42,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 19:42:42,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 19:42:42,985 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 19:42:43,172 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 19:42:43,174 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 19:42:43,507 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 19:42:43,515 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 19:42:43,515 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-29 19:42:43,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:42:43 BoogieIcfgContainer [2023-08-29 19:42:43,519 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 19:42:43,521 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 19:42:43,521 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 19:42:43,524 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 19:42:43,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 07:42:42" (1/3) ... [2023-08-29 19:42:43,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33182de2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:42:43, skipping insertion in model container [2023-08-29 19:42:43,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:42" (2/3) ... [2023-08-29 19:42:43,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33182de2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:42:43, skipping insertion in model container [2023-08-29 19:42:43,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:42:43" (3/3) ... [2023-08-29 19:42:43,527 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-2.i [2023-08-29 19:42:43,542 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 19:42:43,542 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-08-29 19:42:43,542 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 19:42:43,642 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 19:42:43,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 167 transitions, 350 flow [2023-08-29 19:42:43,761 INFO L130 PetriNetUnfolder]: 10/165 cut-off events. [2023-08-29 19:42:43,762 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:42:43,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 165 events. 10/165 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 412 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 119. Up to 3 conditions per place. [2023-08-29 19:42:43,769 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 167 transitions, 350 flow [2023-08-29 19:42:43,795 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 158 places, 161 transitions, 334 flow [2023-08-29 19:42:43,800 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:42:43,813 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 158 places, 161 transitions, 334 flow [2023-08-29 19:42:43,820 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 158 places, 161 transitions, 334 flow [2023-08-29 19:42:43,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 161 transitions, 334 flow [2023-08-29 19:42:43,847 INFO L130 PetriNetUnfolder]: 10/161 cut-off events. [2023-08-29 19:42:43,849 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:42:43,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 161 events. 10/161 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 411 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 119. Up to 3 conditions per place. [2023-08-29 19:42:43,856 INFO L119 LiptonReduction]: Number of co-enabled transitions 7792 [2023-08-29 19:42:48,105 INFO L134 LiptonReduction]: Checked pairs total: 12544 [2023-08-29 19:42:48,105 INFO L136 LiptonReduction]: Total number of compositions: 160 [2023-08-29 19:42:48,117 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 19:42:48,122 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;@3498e984, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:42:48,123 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-08-29 19:42:48,124 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-29 19:42:48,124 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:42:48,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:48,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 19:42:48,125 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:48,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:48,130 INFO L85 PathProgramCache]: Analyzing trace with hash 680, now seen corresponding path program 1 times [2023-08-29 19:42:48,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:48,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99729733] [2023-08-29 19:42:48,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:48,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:48,224 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 19:42:48,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:48,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99729733] [2023-08-29 19:42:48,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99729733] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:48,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:48,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 19:42:48,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705204065] [2023-08-29 19:42:48,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:48,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 19:42:48,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:48,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 19:42:48,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 19:42:48,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 327 [2023-08-29 19:42:48,301 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 104 flow. Second operand has 2 states, 2 states have (on average 156.5) internal successors, (313), 2 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:48,301 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:48,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 327 [2023-08-29 19:42:48,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:48,606 INFO L130 PetriNetUnfolder]: 1250/1969 cut-off events. [2023-08-29 19:42:48,606 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 19:42:48,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3932 conditions, 1969 events. 1250/1969 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9149 event pairs, 994 based on Foata normal form. 0/1091 useless extension candidates. Maximal degree in co-relation 3680. Up to 1922 conditions per place. [2023-08-29 19:42:48,618 INFO L137 encePairwiseOnDemand]: 325/327 looper letters, 42 selfloop transitions, 0 changer transitions 0/44 dead transitions. [2023-08-29 19:42:48,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 44 transitions, 184 flow [2023-08-29 19:42:48,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 19:42:48,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 19:42:48,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 356 transitions. [2023-08-29 19:42:48,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5443425076452599 [2023-08-29 19:42:48,642 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 356 transitions. [2023-08-29 19:42:48,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 356 transitions. [2023-08-29 19:42:48,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:48,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 356 transitions. [2023-08-29 19:42:48,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 178.0) internal successors, (356), 2 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:48,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 327.0) internal successors, (981), 3 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:48,659 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 327.0) internal successors, (981), 3 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:48,661 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 104 flow. Second operand 2 states and 356 transitions. [2023-08-29 19:42:48,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 44 transitions, 184 flow [2023-08-29 19:42:48,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 176 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 19:42:48,667 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 92 flow [2023-08-29 19:42:48,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=92, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2023-08-29 19:42:48,672 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2023-08-29 19:42:48,672 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 92 flow [2023-08-29 19:42:48,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 156.5) internal successors, (313), 2 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:48,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:48,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 19:42:48,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 19:42:48,674 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:48,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:48,682 INFO L85 PathProgramCache]: Analyzing trace with hash 671187, now seen corresponding path program 1 times [2023-08-29 19:42:48,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:48,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034626787] [2023-08-29 19:42:48,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:48,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:48,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:48,891 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 19:42:48,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:48,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034626787] [2023-08-29 19:42:48,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034626787] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:48,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:48,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:42:48,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950305402] [2023-08-29 19:42:48,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:48,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:42:48,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:48,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:42:48,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:42:48,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 327 [2023-08-29 19:42:48,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:48,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:48,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 327 [2023-08-29 19:42:48,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:49,141 INFO L130 PetriNetUnfolder]: 1223/1917 cut-off events. [2023-08-29 19:42:49,142 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-29 19:42:49,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3802 conditions, 1917 events. 1223/1917 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 8798 event pairs, 972 based on Foata normal form. 0/1073 useless extension candidates. Maximal degree in co-relation 3799. Up to 1869 conditions per place. [2023-08-29 19:42:49,152 INFO L137 encePairwiseOnDemand]: 323/327 looper letters, 38 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-29 19:42:49,152 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 168 flow [2023-08-29 19:42:49,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:42:49,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:42:49,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 495 transitions. [2023-08-29 19:42:49,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5045871559633027 [2023-08-29 19:42:49,157 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 495 transitions. [2023-08-29 19:42:49,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 495 transitions. [2023-08-29 19:42:49,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:49,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 495 transitions. [2023-08-29 19:42:49,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:49,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:49,163 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:49,163 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 92 flow. Second operand 3 states and 495 transitions. [2023-08-29 19:42:49,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 168 flow [2023-08-29 19:42:49,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 42 transitions, 168 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:42:49,164 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 92 flow [2023-08-29 19:42:49,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=43, PETRI_TRANSITIONS=42} [2023-08-29 19:42:49,165 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2023-08-29 19:42:49,165 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 92 flow [2023-08-29 19:42:49,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:49,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:49,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 19:42:49,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 19:42:49,167 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:49,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:49,169 INFO L85 PathProgramCache]: Analyzing trace with hash 671188, now seen corresponding path program 1 times [2023-08-29 19:42:49,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:49,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455827839] [2023-08-29 19:42:49,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:49,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:49,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:49,259 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 19:42:49,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:49,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455827839] [2023-08-29 19:42:49,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455827839] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:49,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:49,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:42:49,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878178836] [2023-08-29 19:42:49,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:49,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:42:49,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:49,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:42:49,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:42:49,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 327 [2023-08-29 19:42:49,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 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 19:42:49,309 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:49,309 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 327 [2023-08-29 19:42:49,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:49,455 INFO L130 PetriNetUnfolder]: 1196/1865 cut-off events. [2023-08-29 19:42:49,455 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-29 19:42:49,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3702 conditions, 1865 events. 1196/1865 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8455 event pairs, 950 based on Foata normal form. 0/1055 useless extension candidates. Maximal degree in co-relation 3698. Up to 1818 conditions per place. [2023-08-29 19:42:49,466 INFO L137 encePairwiseOnDemand]: 323/327 looper letters, 36 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-29 19:42:49,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 164 flow [2023-08-29 19:42:49,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:42:49,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:42:49,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 481 transitions. [2023-08-29 19:42:49,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49031600407747195 [2023-08-29 19:42:49,469 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 481 transitions. [2023-08-29 19:42:49,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 481 transitions. [2023-08-29 19:42:49,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:49,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 481 transitions. [2023-08-29 19:42:49,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:49,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:49,473 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:49,473 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 92 flow. Second operand 3 states and 481 transitions. [2023-08-29 19:42:49,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 164 flow [2023-08-29 19:42:49,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 160 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:42:49,475 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 88 flow [2023-08-29 19:42:49,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2023-08-29 19:42:49,477 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -7 predicate places. [2023-08-29 19:42:49,477 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 88 flow [2023-08-29 19:42:49,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 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 19:42:49,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:49,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:42:49,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 19:42:49,478 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:49,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:49,479 INFO L85 PathProgramCache]: Analyzing trace with hash 645028316, now seen corresponding path program 1 times [2023-08-29 19:42:49,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:49,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278280948] [2023-08-29 19:42:49,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:49,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:49,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:49,625 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 19:42:49,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:49,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278280948] [2023-08-29 19:42:49,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278280948] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:49,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:49,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:42:49,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341313148] [2023-08-29 19:42:49,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:49,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:42:49,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:49,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:42:49,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:42:49,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 327 [2023-08-29 19:42:49,696 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:49,696 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:49,697 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 327 [2023-08-29 19:42:49,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:49,821 INFO L130 PetriNetUnfolder]: 875/1390 cut-off events. [2023-08-29 19:42:49,822 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-29 19:42:49,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2763 conditions, 1390 events. 875/1390 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6042 event pairs, 688 based on Foata normal form. 0/849 useless extension candidates. Maximal degree in co-relation 2759. Up to 1354 conditions per place. [2023-08-29 19:42:49,832 INFO L137 encePairwiseOnDemand]: 324/327 looper letters, 35 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-08-29 19:42:49,832 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 160 flow [2023-08-29 19:42:49,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:42:49,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:42:49,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 485 transitions. [2023-08-29 19:42:49,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4943934760448522 [2023-08-29 19:42:49,835 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 485 transitions. [2023-08-29 19:42:49,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 485 transitions. [2023-08-29 19:42:49,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:49,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 485 transitions. [2023-08-29 19:42:49,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:49,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:49,844 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:49,844 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 88 flow. Second operand 3 states and 485 transitions. [2023-08-29 19:42:49,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 160 flow [2023-08-29 19:42:49,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 156 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:42:49,846 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 86 flow [2023-08-29 19:42:49,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2023-08-29 19:42:49,848 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -8 predicate places. [2023-08-29 19:42:49,848 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 86 flow [2023-08-29 19:42:49,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:49,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:49,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:42:49,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 19:42:49,849 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:49,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:49,850 INFO L85 PathProgramCache]: Analyzing trace with hash 645028315, now seen corresponding path program 1 times [2023-08-29 19:42:49,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:49,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215520623] [2023-08-29 19:42:49,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:49,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:49,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:49,968 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 19:42:49,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:49,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215520623] [2023-08-29 19:42:49,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215520623] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:49,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:49,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:42:49,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287416837] [2023-08-29 19:42:49,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:49,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:42:49,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:49,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:42:49,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:42:50,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 327 [2023-08-29 19:42:50,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 144.25) internal successors, (577), 4 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:50,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:50,030 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 327 [2023-08-29 19:42:50,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:50,123 INFO L130 PetriNetUnfolder]: 554/915 cut-off events. [2023-08-29 19:42:50,124 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-29 19:42:50,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1824 conditions, 915 events. 554/915 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3804 event pairs, 426 based on Foata normal form. 0/643 useless extension candidates. Maximal degree in co-relation 1820. Up to 890 conditions per place. [2023-08-29 19:42:50,128 INFO L137 encePairwiseOnDemand]: 324/327 looper letters, 34 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2023-08-29 19:42:50,128 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 156 flow [2023-08-29 19:42:50,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:42:50,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:42:50,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 466 transitions. [2023-08-29 19:42:50,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750254841997961 [2023-08-29 19:42:50,130 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 466 transitions. [2023-08-29 19:42:50,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 466 transitions. [2023-08-29 19:42:50,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:50,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 466 transitions. [2023-08-29 19:42:50,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 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 19:42:50,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:50,134 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:50,135 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 86 flow. Second operand 3 states and 466 transitions. [2023-08-29 19:42:50,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 156 flow [2023-08-29 19:42:50,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 38 transitions, 152 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:42:50,136 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 84 flow [2023-08-29 19:42:50,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-08-29 19:42:50,138 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -9 predicate places. [2023-08-29 19:42:50,138 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 84 flow [2023-08-29 19:42:50,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 144.25) internal successors, (577), 4 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:50,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:50,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 19:42:50,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 19:42:50,140 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:50,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:50,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1479137457, now seen corresponding path program 1 times [2023-08-29 19:42:50,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:50,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877527364] [2023-08-29 19:42:50,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:50,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:50,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:50,292 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 19:42:50,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:50,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877527364] [2023-08-29 19:42:50,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877527364] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:50,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:50,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:42:50,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134205429] [2023-08-29 19:42:50,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:50,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:42:50,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:50,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:42:50,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:42:50,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 327 [2023-08-29 19:42:50,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 149.2) internal successors, (746), 5 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:50,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:50,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 327 [2023-08-29 19:42:50,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:50,594 INFO L130 PetriNetUnfolder]: 630/1056 cut-off events. [2023-08-29 19:42:50,594 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-29 19:42:50,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2098 conditions, 1056 events. 630/1056 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4962 event pairs, 114 based on Foata normal form. 0/776 useless extension candidates. Maximal degree in co-relation 2094. Up to 669 conditions per place. [2023-08-29 19:42:50,599 INFO L137 encePairwiseOnDemand]: 321/327 looper letters, 70 selfloop transitions, 7 changer transitions 0/79 dead transitions. [2023-08-29 19:42:50,600 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 79 transitions, 326 flow [2023-08-29 19:42:50,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 19:42:50,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 19:42:50,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 818 transitions. [2023-08-29 19:42:50,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5003058103975535 [2023-08-29 19:42:50,602 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 818 transitions. [2023-08-29 19:42:50,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 818 transitions. [2023-08-29 19:42:50,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:50,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 818 transitions. [2023-08-29 19:42:50,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 163.6) internal successors, (818), 5 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:50,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 327.0) internal successors, (1962), 6 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:50,608 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 327.0) internal successors, (1962), 6 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:50,608 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 84 flow. Second operand 5 states and 818 transitions. [2023-08-29 19:42:50,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 79 transitions, 326 flow [2023-08-29 19:42:50,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 79 transitions, 320 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:42:50,611 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 96 flow [2023-08-29 19:42:50,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=96, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2023-08-29 19:42:50,611 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -8 predicate places. [2023-08-29 19:42:50,612 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 96 flow [2023-08-29 19:42:50,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 149.2) internal successors, (746), 5 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:50,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:50,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 19:42:50,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 19:42:50,613 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:50,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:50,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1479137456, now seen corresponding path program 1 times [2023-08-29 19:42:50,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:50,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298478866] [2023-08-29 19:42:50,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:50,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:50,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:50,784 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 19:42:50,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:50,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298478866] [2023-08-29 19:42:50,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298478866] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:50,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:50,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:42:50,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533792731] [2023-08-29 19:42:50,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:50,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:42:50,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:50,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:42:50,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:42:50,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 327 [2023-08-29 19:42:50,906 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 96 flow. Second operand has 5 states, 5 states have (on average 148.2) internal successors, (741), 5 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:50,906 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:50,906 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 327 [2023-08-29 19:42:50,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:51,137 INFO L130 PetriNetUnfolder]: 570/959 cut-off events. [2023-08-29 19:42:51,137 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2023-08-29 19:42:51,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2018 conditions, 959 events. 570/959 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3672 event pairs, 195 based on Foata normal form. 16/775 useless extension candidates. Maximal degree in co-relation 2014. Up to 754 conditions per place. [2023-08-29 19:42:51,141 INFO L137 encePairwiseOnDemand]: 320/327 looper letters, 62 selfloop transitions, 4 changer transitions 0/68 dead transitions. [2023-08-29 19:42:51,142 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 68 transitions, 293 flow [2023-08-29 19:42:51,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 19:42:51,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 19:42:51,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 806 transitions. [2023-08-29 19:42:51,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4929663608562691 [2023-08-29 19:42:51,144 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 806 transitions. [2023-08-29 19:42:51,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 806 transitions. [2023-08-29 19:42:51,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:51,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 806 transitions. [2023-08-29 19:42:51,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 161.2) internal successors, (806), 5 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:51,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 327.0) internal successors, (1962), 6 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:51,149 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 327.0) internal successors, (1962), 6 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:51,149 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 96 flow. Second operand 5 states and 806 transitions. [2023-08-29 19:42:51,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 68 transitions, 293 flow [2023-08-29 19:42:51,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 68 transitions, 285 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:42:51,151 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 122 flow [2023-08-29 19:42:51,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=122, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-08-29 19:42:51,152 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2023-08-29 19:42:51,152 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 122 flow [2023-08-29 19:42:51,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.2) internal successors, (741), 5 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:51,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:51,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:42:51,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 19:42:51,154 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:51,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:51,154 INFO L85 PathProgramCache]: Analyzing trace with hash -161798454, now seen corresponding path program 1 times [2023-08-29 19:42:51,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:51,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208029024] [2023-08-29 19:42:51,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:51,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:51,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:51,190 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 19:42:51,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:51,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208029024] [2023-08-29 19:42:51,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208029024] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:51,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:51,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:42:51,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031819214] [2023-08-29 19:42:51,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:51,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:42:51,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:51,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:42:51,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:42:51,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 327 [2023-08-29 19:42:51,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:51,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:51,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 327 [2023-08-29 19:42:51,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:51,319 INFO L130 PetriNetUnfolder]: 615/1052 cut-off events. [2023-08-29 19:42:51,319 INFO L131 PetriNetUnfolder]: For 224/224 co-relation queries the response was YES. [2023-08-29 19:42:51,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2387 conditions, 1052 events. 615/1052 cut-off events. For 224/224 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4589 event pairs, 276 based on Foata normal form. 0/868 useless extension candidates. Maximal degree in co-relation 2380. Up to 922 conditions per place. [2023-08-29 19:42:51,325 INFO L137 encePairwiseOnDemand]: 324/327 looper letters, 55 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2023-08-29 19:42:51,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 60 transitions, 283 flow [2023-08-29 19:42:51,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:42:51,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:42:51,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2023-08-29 19:42:51,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208970438328236 [2023-08-29 19:42:51,328 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2023-08-29 19:42:51,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2023-08-29 19:42:51,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:51,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2023-08-29 19:42:51,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:51,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:51,331 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:51,332 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 122 flow. Second operand 3 states and 511 transitions. [2023-08-29 19:42:51,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 60 transitions, 283 flow [2023-08-29 19:42:51,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 60 transitions, 279 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:42:51,334 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 133 flow [2023-08-29 19:42:51,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2023-08-29 19:42:51,335 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -2 predicate places. [2023-08-29 19:42:51,335 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 133 flow [2023-08-29 19:42:51,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:51,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:51,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:42:51,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 19:42:51,336 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:51,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:51,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1200004358, now seen corresponding path program 1 times [2023-08-29 19:42:51,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:51,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475126945] [2023-08-29 19:42:51,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:51,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:51,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:51,370 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 19:42:51,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:51,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475126945] [2023-08-29 19:42:51,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475126945] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:51,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:51,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:42:51,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415426337] [2023-08-29 19:42:51,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:51,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:42:51,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:51,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:42:51,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:42:51,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 327 [2023-08-29 19:42:51,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:51,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:51,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 327 [2023-08-29 19:42:51,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:51,507 INFO L130 PetriNetUnfolder]: 638/1077 cut-off events. [2023-08-29 19:42:51,507 INFO L131 PetriNetUnfolder]: For 372/372 co-relation queries the response was YES. [2023-08-29 19:42:51,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2645 conditions, 1077 events. 638/1077 cut-off events. For 372/372 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4691 event pairs, 219 based on Foata normal form. 10/899 useless extension candidates. Maximal degree in co-relation 2637. Up to 861 conditions per place. [2023-08-29 19:42:51,514 INFO L137 encePairwiseOnDemand]: 324/327 looper letters, 58 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-08-29 19:42:51,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 62 transitions, 302 flow [2023-08-29 19:42:51,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:42:51,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:42:51,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 516 transitions. [2023-08-29 19:42:51,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5259938837920489 [2023-08-29 19:42:51,516 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 516 transitions. [2023-08-29 19:42:51,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 516 transitions. [2023-08-29 19:42:51,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:51,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 516 transitions. [2023-08-29 19:42:51,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:51,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:51,520 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:51,520 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 133 flow. Second operand 3 states and 516 transitions. [2023-08-29 19:42:51,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 62 transitions, 302 flow [2023-08-29 19:42:51,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 62 transitions, 298 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:42:51,524 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 141 flow [2023-08-29 19:42:51,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2023-08-29 19:42:51,524 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 0 predicate places. [2023-08-29 19:42:51,525 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 141 flow [2023-08-29 19:42:51,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:51,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:51,525 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:42:51,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 19:42:51,526 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:51,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:51,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1183384702, now seen corresponding path program 1 times [2023-08-29 19:42:51,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:51,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119470134] [2023-08-29 19:42:51,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:51,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:51,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:51,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:51,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:51,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119470134] [2023-08-29 19:42:51,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119470134] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:42:51,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41593734] [2023-08-29 19:42:51,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:51,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:42:51,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:42:51,833 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 19:42:51,858 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 19:42:51,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:51,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-29 19:42:51,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:42:52,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:42:52,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:42:52,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:42:52,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2023-08-29 19:42:52,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:52,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:42:52,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:52,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41593734] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:42:52,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:42:52,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 19 [2023-08-29 19:42:52,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052919389] [2023-08-29 19:42:52,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:42:52,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-29 19:42:52,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:52,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-29 19:42:52,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-08-29 19:42:53,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 327 [2023-08-29 19:42:53,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 141 flow. Second operand has 21 states, 21 states have (on average 139.85714285714286) internal successors, (2937), 21 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:53,635 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:53,635 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 327 [2023-08-29 19:42:53,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:54,839 INFO L130 PetriNetUnfolder]: 1709/2796 cut-off events. [2023-08-29 19:42:54,840 INFO L131 PetriNetUnfolder]: For 890/890 co-relation queries the response was YES. [2023-08-29 19:42:54,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6989 conditions, 2796 events. 1709/2796 cut-off events. For 890/890 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 13219 event pairs, 169 based on Foata normal form. 66/2424 useless extension candidates. Maximal degree in co-relation 6980. Up to 1096 conditions per place. [2023-08-29 19:42:54,875 INFO L137 encePairwiseOnDemand]: 317/327 looper letters, 204 selfloop transitions, 22 changer transitions 0/226 dead transitions. [2023-08-29 19:42:54,876 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 226 transitions, 1075 flow [2023-08-29 19:42:54,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 19:42:54,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 19:42:54,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2166 transitions. [2023-08-29 19:42:54,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47313237221494103 [2023-08-29 19:42:54,882 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2166 transitions. [2023-08-29 19:42:54,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2166 transitions. [2023-08-29 19:42:54,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:54,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2166 transitions. [2023-08-29 19:42:54,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 154.71428571428572) internal successors, (2166), 14 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:54,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 327.0) internal successors, (4905), 15 states have internal predecessors, (4905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:54,896 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 327.0) internal successors, (4905), 15 states have internal predecessors, (4905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:54,896 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 141 flow. Second operand 14 states and 2166 transitions. [2023-08-29 19:42:54,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 226 transitions, 1075 flow [2023-08-29 19:42:54,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 226 transitions, 1072 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:42:54,903 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 308 flow [2023-08-29 19:42:54,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=308, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2023-08-29 19:42:54,904 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 19 predicate places. [2023-08-29 19:42:54,905 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 308 flow [2023-08-29 19:42:54,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 139.85714285714286) internal successors, (2937), 21 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:54,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:54,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:42:54,915 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 19:42:55,112 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,SelfDestructingSolverStorable9 [2023-08-29 19:42:55,112 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:55,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:55,113 INFO L85 PathProgramCache]: Analyzing trace with hash 705944842, now seen corresponding path program 1 times [2023-08-29 19:42:55,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:55,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036545081] [2023-08-29 19:42:55,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:55,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:55,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:55,201 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 19:42:55,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:55,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036545081] [2023-08-29 19:42:55,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036545081] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:55,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:55,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:42:55,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662991436] [2023-08-29 19:42:55,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:55,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:42:55,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:55,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:42:55,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:42:55,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 327 [2023-08-29 19:42:55,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 308 flow. Second operand has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:55,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:55,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 327 [2023-08-29 19:42:55,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:55,347 INFO L130 PetriNetUnfolder]: 487/940 cut-off events. [2023-08-29 19:42:55,348 INFO L131 PetriNetUnfolder]: For 896/896 co-relation queries the response was YES. [2023-08-29 19:42:55,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2681 conditions, 940 events. 487/940 cut-off events. For 896/896 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 4019 event pairs, 73 based on Foata normal form. 42/912 useless extension candidates. Maximal degree in co-relation 2665. Up to 682 conditions per place. [2023-08-29 19:42:55,356 INFO L137 encePairwiseOnDemand]: 322/327 looper letters, 48 selfloop transitions, 10 changer transitions 0/62 dead transitions. [2023-08-29 19:42:55,356 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 62 transitions, 406 flow [2023-08-29 19:42:55,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:42:55,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:42:55,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 496 transitions. [2023-08-29 19:42:55,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5056065239551478 [2023-08-29 19:42:55,358 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 496 transitions. [2023-08-29 19:42:55,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 496 transitions. [2023-08-29 19:42:55,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:55,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 496 transitions. [2023-08-29 19:42:55,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:55,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:55,362 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:55,362 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 308 flow. Second operand 3 states and 496 transitions. [2023-08-29 19:42:55,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 62 transitions, 406 flow [2023-08-29 19:42:55,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 62 transitions, 374 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-08-29 19:42:55,369 INFO L231 Difference]: Finished difference. Result has 63 places, 53 transitions, 254 flow [2023-08-29 19:42:55,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=254, PETRI_PLACES=63, PETRI_TRANSITIONS=53} [2023-08-29 19:42:55,370 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 15 predicate places. [2023-08-29 19:42:55,370 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 53 transitions, 254 flow [2023-08-29 19:42:55,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:55,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:55,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:42:55,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 19:42:55,371 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:55,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:55,371 INFO L85 PathProgramCache]: Analyzing trace with hash -190660559, now seen corresponding path program 1 times [2023-08-29 19:42:55,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:55,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645627925] [2023-08-29 19:42:55,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:55,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:55,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:55,752 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 19:42:55,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:55,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645627925] [2023-08-29 19:42:55,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645627925] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:55,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:55,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-29 19:42:55,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773786220] [2023-08-29 19:42:55,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:55,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 19:42:55,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:55,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 19:42:55,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-08-29 19:42:56,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 327 [2023-08-29 19:42:56,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 53 transitions, 254 flow. Second operand has 13 states, 13 states have (on average 131.46153846153845) internal successors, (1709), 13 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:56,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:56,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 327 [2023-08-29 19:42:56,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:57,181 INFO L130 PetriNetUnfolder]: 695/1286 cut-off events. [2023-08-29 19:42:57,181 INFO L131 PetriNetUnfolder]: For 527/527 co-relation queries the response was YES. [2023-08-29 19:42:57,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3592 conditions, 1286 events. 695/1286 cut-off events. For 527/527 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 5603 event pairs, 103 based on Foata normal form. 12/1272 useless extension candidates. Maximal degree in co-relation 3576. Up to 672 conditions per place. [2023-08-29 19:42:57,187 INFO L137 encePairwiseOnDemand]: 312/327 looper letters, 138 selfloop transitions, 17 changer transitions 0/155 dead transitions. [2023-08-29 19:42:57,188 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 155 transitions, 894 flow [2023-08-29 19:42:57,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-29 19:42:57,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-29 19:42:57,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1842 transitions. [2023-08-29 19:42:57,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43330980945659847 [2023-08-29 19:42:57,194 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1842 transitions. [2023-08-29 19:42:57,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1842 transitions. [2023-08-29 19:42:57,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:57,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1842 transitions. [2023-08-29 19:42:57,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 141.69230769230768) internal successors, (1842), 13 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:57,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 327.0) internal successors, (4578), 14 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:57,204 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 327.0) internal successors, (4578), 14 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:57,204 INFO L175 Difference]: Start difference. First operand has 63 places, 53 transitions, 254 flow. Second operand 13 states and 1842 transitions. [2023-08-29 19:42:57,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 155 transitions, 894 flow [2023-08-29 19:42:57,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 155 transitions, 872 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-29 19:42:57,210 INFO L231 Difference]: Finished difference. Result has 80 places, 63 transitions, 360 flow [2023-08-29 19:42:57,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=360, PETRI_PLACES=80, PETRI_TRANSITIONS=63} [2023-08-29 19:42:57,212 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 32 predicate places. [2023-08-29 19:42:57,212 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 63 transitions, 360 flow [2023-08-29 19:42:57,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 131.46153846153845) internal successors, (1709), 13 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:57,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:57,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:42:57,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 19:42:57,213 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:57,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:57,214 INFO L85 PathProgramCache]: Analyzing trace with hash -891010450, now seen corresponding path program 1 times [2023-08-29 19:42:57,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:57,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477977449] [2023-08-29 19:42:57,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:57,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:57,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:57,298 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 19:42:57,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:57,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477977449] [2023-08-29 19:42:57,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477977449] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:57,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:57,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-29 19:42:57,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542708701] [2023-08-29 19:42:57,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:57,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 19:42:57,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:57,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 19:42:57,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-29 19:42:57,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 327 [2023-08-29 19:42:57,523 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 63 transitions, 360 flow. Second operand has 7 states, 7 states have (on average 146.57142857142858) internal successors, (1026), 7 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:57,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:57,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 327 [2023-08-29 19:42:57,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:57,814 INFO L130 PetriNetUnfolder]: 763/1464 cut-off events. [2023-08-29 19:42:57,814 INFO L131 PetriNetUnfolder]: For 1111/1111 co-relation queries the response was YES. [2023-08-29 19:42:57,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4428 conditions, 1464 events. 763/1464 cut-off events. For 1111/1111 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6962 event pairs, 81 based on Foata normal form. 0/1406 useless extension candidates. Maximal degree in co-relation 4405. Up to 656 conditions per place. [2023-08-29 19:42:57,824 INFO L137 encePairwiseOnDemand]: 318/327 looper letters, 77 selfloop transitions, 25 changer transitions 0/106 dead transitions. [2023-08-29 19:42:57,824 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 106 transitions, 743 flow [2023-08-29 19:42:57,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 19:42:57,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 19:42:57,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1371 transitions. [2023-08-29 19:42:57,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658511722731906 [2023-08-29 19:42:57,828 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1371 transitions. [2023-08-29 19:42:57,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1371 transitions. [2023-08-29 19:42:57,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:57,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1371 transitions. [2023-08-29 19:42:57,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 152.33333333333334) internal successors, (1371), 9 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:57,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:57,836 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:57,836 INFO L175 Difference]: Start difference. First operand has 80 places, 63 transitions, 360 flow. Second operand 9 states and 1371 transitions. [2023-08-29 19:42:57,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 106 transitions, 743 flow [2023-08-29 19:42:57,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 106 transitions, 727 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-29 19:42:57,844 INFO L231 Difference]: Finished difference. Result has 85 places, 72 transitions, 482 flow [2023-08-29 19:42:57,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=482, PETRI_PLACES=85, PETRI_TRANSITIONS=72} [2023-08-29 19:42:57,844 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 37 predicate places. [2023-08-29 19:42:57,844 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 72 transitions, 482 flow [2023-08-29 19:42:57,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.57142857142858) internal successors, (1026), 7 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:57,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:57,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:42:57,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-29 19:42:57,846 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:57,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:57,846 INFO L85 PathProgramCache]: Analyzing trace with hash -72479684, now seen corresponding path program 1 times [2023-08-29 19:42:57,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:57,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316189666] [2023-08-29 19:42:57,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:57,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:57,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:57,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:42:57,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:57,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316189666] [2023-08-29 19:42:57,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316189666] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:57,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:57,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:42:57,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624508018] [2023-08-29 19:42:57,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:57,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:42:57,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:57,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:42:57,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:42:57,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 327 [2023-08-29 19:42:57,888 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 72 transitions, 482 flow. Second operand has 3 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 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 19:42:57,888 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:57,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 327 [2023-08-29 19:42:57,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:58,125 INFO L130 PetriNetUnfolder]: 987/1898 cut-off events. [2023-08-29 19:42:58,125 INFO L131 PetriNetUnfolder]: For 2198/2202 co-relation queries the response was YES. [2023-08-29 19:42:58,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6059 conditions, 1898 events. 987/1898 cut-off events. For 2198/2202 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 9777 event pairs, 573 based on Foata normal form. 70/1886 useless extension candidates. Maximal degree in co-relation 6033. Up to 1351 conditions per place. [2023-08-29 19:42:58,137 INFO L137 encePairwiseOnDemand]: 323/327 looper letters, 110 selfloop transitions, 3 changer transitions 0/117 dead transitions. [2023-08-29 19:42:58,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 117 transitions, 1007 flow [2023-08-29 19:42:58,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:42:58,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:42:58,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-08-29 19:42:58,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.527013251783894 [2023-08-29 19:42:58,140 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-08-29 19:42:58,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-08-29 19:42:58,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:58,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-08-29 19:42:58,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:58,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:58,144 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:58,144 INFO L175 Difference]: Start difference. First operand has 85 places, 72 transitions, 482 flow. Second operand 3 states and 517 transitions. [2023-08-29 19:42:58,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 117 transitions, 1007 flow [2023-08-29 19:42:58,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 117 transitions, 925 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-08-29 19:42:58,155 INFO L231 Difference]: Finished difference. Result has 84 places, 74 transitions, 449 flow [2023-08-29 19:42:58,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=449, PETRI_PLACES=84, PETRI_TRANSITIONS=74} [2023-08-29 19:42:58,156 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 36 predicate places. [2023-08-29 19:42:58,156 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 74 transitions, 449 flow [2023-08-29 19:42:58,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 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 19:42:58,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:58,157 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-08-29 19:42:58,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-29 19:42:58,157 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:58,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:58,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1459253539, now seen corresponding path program 1 times [2023-08-29 19:42:58,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:58,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469049044] [2023-08-29 19:42:58,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:58,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:58,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:58,297 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:58,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:58,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469049044] [2023-08-29 19:42:58,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469049044] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:42:58,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829226434] [2023-08-29 19:42:58,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:58,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:42:58,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:42:58,299 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 19:42:58,324 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 19:42:58,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:58,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 19:42:58,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:42:58,455 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:58,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:42:58,511 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:58,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829226434] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:42:58,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:42:58,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-08-29 19:42:58,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643718691] [2023-08-29 19:42:58,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:42:58,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 19:42:58,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:58,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 19:42:58,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-08-29 19:42:58,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 327 [2023-08-29 19:42:58,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 74 transitions, 449 flow. Second operand has 15 states, 15 states have (on average 145.33333333333334) internal successors, (2180), 15 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:58,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:58,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 327 [2023-08-29 19:42:58,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:59,332 INFO L130 PetriNetUnfolder]: 2081/3874 cut-off events. [2023-08-29 19:42:59,332 INFO L131 PetriNetUnfolder]: For 3811/3811 co-relation queries the response was YES. [2023-08-29 19:42:59,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12516 conditions, 3874 events. 2081/3874 cut-off events. For 3811/3811 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 20117 event pairs, 473 based on Foata normal form. 96/3952 useless extension candidates. Maximal degree in co-relation 12489. Up to 989 conditions per place. [2023-08-29 19:42:59,357 INFO L137 encePairwiseOnDemand]: 316/327 looper letters, 226 selfloop transitions, 52 changer transitions 0/278 dead transitions. [2023-08-29 19:42:59,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 278 transitions, 2002 flow [2023-08-29 19:42:59,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-29 19:42:59,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-29 19:42:59,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2488 transitions. [2023-08-29 19:42:59,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47553516819571867 [2023-08-29 19:42:59,364 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2488 transitions. [2023-08-29 19:42:59,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2488 transitions. [2023-08-29 19:42:59,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:59,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2488 transitions. [2023-08-29 19:42:59,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 155.5) internal successors, (2488), 16 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:59,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 327.0) internal successors, (5559), 17 states have internal predecessors, (5559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:59,378 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 327.0) internal successors, (5559), 17 states have internal predecessors, (5559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:59,378 INFO L175 Difference]: Start difference. First operand has 84 places, 74 transitions, 449 flow. Second operand 16 states and 2488 transitions. [2023-08-29 19:42:59,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 278 transitions, 2002 flow [2023-08-29 19:42:59,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 278 transitions, 1986 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:42:59,396 INFO L231 Difference]: Finished difference. Result has 108 places, 114 transitions, 959 flow [2023-08-29 19:42:59,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=959, PETRI_PLACES=108, PETRI_TRANSITIONS=114} [2023-08-29 19:42:59,397 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 60 predicate places. [2023-08-29 19:42:59,397 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 114 transitions, 959 flow [2023-08-29 19:42:59,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 145.33333333333334) internal successors, (2180), 15 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:59,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:59,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:42:59,408 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 19:42:59,603 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,SelfDestructingSolverStorable14 [2023-08-29 19:42:59,604 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:59,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:59,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1566742044, now seen corresponding path program 1 times [2023-08-29 19:42:59,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:59,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370687593] [2023-08-29 19:42:59,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:59,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:59,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:00,149 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 19:43:00,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:00,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370687593] [2023-08-29 19:43:00,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370687593] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:00,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:00,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-29 19:43:00,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56368987] [2023-08-29 19:43:00,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:00,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 19:43:00,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:00,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 19:43:00,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2023-08-29 19:43:01,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 327 [2023-08-29 19:43:01,144 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 114 transitions, 959 flow. Second operand has 14 states, 14 states have (on average 128.5) internal successors, (1799), 14 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:01,144 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:01,144 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 327 [2023-08-29 19:43:01,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:03,695 INFO L130 PetriNetUnfolder]: 3566/6769 cut-off events. [2023-08-29 19:43:03,695 INFO L131 PetriNetUnfolder]: For 13994/13994 co-relation queries the response was YES. [2023-08-29 19:43:03,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25118 conditions, 6769 events. 3566/6769 cut-off events. For 13994/13994 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 41806 event pairs, 744 based on Foata normal form. 24/6745 useless extension candidates. Maximal degree in co-relation 25081. Up to 1479 conditions per place. [2023-08-29 19:43:03,739 INFO L137 encePairwiseOnDemand]: 306/327 looper letters, 194 selfloop transitions, 191 changer transitions 0/392 dead transitions. [2023-08-29 19:43:03,739 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 392 transitions, 3518 flow [2023-08-29 19:43:03,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-29 19:43:03,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-29 19:43:03,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 4797 transitions. [2023-08-29 19:43:03,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074923547400612 [2023-08-29 19:43:03,751 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 4797 transitions. [2023-08-29 19:43:03,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 4797 transitions. [2023-08-29 19:43:03,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:03,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 4797 transitions. [2023-08-29 19:43:03,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 133.25) internal successors, (4797), 36 states have internal predecessors, (4797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:03,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 327.0) internal successors, (12099), 37 states have internal predecessors, (12099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:03,782 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 327.0) internal successors, (12099), 37 states have internal predecessors, (12099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:03,782 INFO L175 Difference]: Start difference. First operand has 108 places, 114 transitions, 959 flow. Second operand 36 states and 4797 transitions. [2023-08-29 19:43:03,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 392 transitions, 3518 flow [2023-08-29 19:43:03,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 392 transitions, 3261 flow, removed 125 selfloop flow, removed 2 redundant places. [2023-08-29 19:43:03,852 INFO L231 Difference]: Finished difference. Result has 149 places, 254 transitions, 2617 flow [2023-08-29 19:43:03,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2617, PETRI_PLACES=149, PETRI_TRANSITIONS=254} [2023-08-29 19:43:03,853 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 101 predicate places. [2023-08-29 19:43:03,854 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 254 transitions, 2617 flow [2023-08-29 19:43:03,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 128.5) internal successors, (1799), 14 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:03,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:03,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:03,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-29 19:43:03,855 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:03,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:03,855 INFO L85 PathProgramCache]: Analyzing trace with hash -686962716, now seen corresponding path program 2 times [2023-08-29 19:43:03,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:03,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452736206] [2023-08-29 19:43:03,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:03,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:03,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:04,580 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 19:43:04,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:04,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452736206] [2023-08-29 19:43:04,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452736206] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:04,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:04,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-29 19:43:04,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267209711] [2023-08-29 19:43:04,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:04,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 19:43:04,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:04,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 19:43:04,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2023-08-29 19:43:05,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 327 [2023-08-29 19:43:05,857 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 254 transitions, 2617 flow. Second operand has 16 states, 16 states have (on average 121.3125) internal successors, (1941), 16 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:05,857 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:05,857 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 327 [2023-08-29 19:43:05,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:07,413 INFO L130 PetriNetUnfolder]: 3798/7207 cut-off events. [2023-08-29 19:43:07,414 INFO L131 PetriNetUnfolder]: For 15690/15690 co-relation queries the response was YES. [2023-08-29 19:43:07,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29085 conditions, 7207 events. 3798/7207 cut-off events. For 15690/15690 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 45113 event pairs, 1655 based on Foata normal form. 6/7160 useless extension candidates. Maximal degree in co-relation 29041. Up to 5881 conditions per place. [2023-08-29 19:43:07,462 INFO L137 encePairwiseOnDemand]: 311/327 looper letters, 315 selfloop transitions, 41 changer transitions 0/363 dead transitions. [2023-08-29 19:43:07,463 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 363 transitions, 3953 flow [2023-08-29 19:43:07,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 19:43:07,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 19:43:07,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1811 transitions. [2023-08-29 19:43:07,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39558759283529926 [2023-08-29 19:43:07,467 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1811 transitions. [2023-08-29 19:43:07,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1811 transitions. [2023-08-29 19:43:07,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:07,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1811 transitions. [2023-08-29 19:43:07,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 129.35714285714286) internal successors, (1811), 14 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:07,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 327.0) internal successors, (4905), 15 states have internal predecessors, (4905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:07,478 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 327.0) internal successors, (4905), 15 states have internal predecessors, (4905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:07,478 INFO L175 Difference]: Start difference. First operand has 149 places, 254 transitions, 2617 flow. Second operand 14 states and 1811 transitions. [2023-08-29 19:43:07,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 363 transitions, 3953 flow [2023-08-29 19:43:07,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 363 transitions, 3723 flow, removed 114 selfloop flow, removed 1 redundant places. [2023-08-29 19:43:07,605 INFO L231 Difference]: Finished difference. Result has 168 places, 275 transitions, 2751 flow [2023-08-29 19:43:07,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=2427, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2751, PETRI_PLACES=168, PETRI_TRANSITIONS=275} [2023-08-29 19:43:07,606 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 120 predicate places. [2023-08-29 19:43:07,606 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 275 transitions, 2751 flow [2023-08-29 19:43:07,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 121.3125) internal successors, (1941), 16 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:07,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:07,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:07,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-29 19:43:07,607 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:07,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:07,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1121809114, now seen corresponding path program 3 times [2023-08-29 19:43:07,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:07,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020629923] [2023-08-29 19:43:07,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:07,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:07,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:08,408 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 19:43:08,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:08,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020629923] [2023-08-29 19:43:08,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020629923] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:08,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:08,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-29 19:43:08,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563982111] [2023-08-29 19:43:08,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:08,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 19:43:08,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:08,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 19:43:08,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2023-08-29 19:43:09,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 327 [2023-08-29 19:43:09,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 275 transitions, 2751 flow. Second operand has 16 states, 16 states have (on average 121.3125) internal successors, (1941), 16 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:09,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:09,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 327 [2023-08-29 19:43:09,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:11,103 INFO L130 PetriNetUnfolder]: 3792/7195 cut-off events. [2023-08-29 19:43:11,103 INFO L131 PetriNetUnfolder]: For 13316/13316 co-relation queries the response was YES. [2023-08-29 19:43:11,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28463 conditions, 7195 events. 3792/7195 cut-off events. For 13316/13316 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 44987 event pairs, 1577 based on Foata normal form. 6/7107 useless extension candidates. Maximal degree in co-relation 28411. Up to 5472 conditions per place. [2023-08-29 19:43:11,156 INFO L137 encePairwiseOnDemand]: 311/327 looper letters, 305 selfloop transitions, 50 changer transitions 0/362 dead transitions. [2023-08-29 19:43:11,156 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 362 transitions, 3881 flow [2023-08-29 19:43:11,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 19:43:11,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 19:43:11,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1931 transitions. [2023-08-29 19:43:11,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39367991845056066 [2023-08-29 19:43:11,165 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1931 transitions. [2023-08-29 19:43:11,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1931 transitions. [2023-08-29 19:43:11,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:11,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1931 transitions. [2023-08-29 19:43:11,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 128.73333333333332) internal successors, (1931), 15 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:11,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 327.0) internal successors, (5232), 16 states have internal predecessors, (5232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:11,176 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 327.0) internal successors, (5232), 16 states have internal predecessors, (5232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:11,176 INFO L175 Difference]: Start difference. First operand has 168 places, 275 transitions, 2751 flow. Second operand 15 states and 1931 transitions. [2023-08-29 19:43:11,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 362 transitions, 3881 flow [2023-08-29 19:43:11,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 362 transitions, 3839 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-08-29 19:43:11,302 INFO L231 Difference]: Finished difference. Result has 180 places, 281 transitions, 2913 flow [2023-08-29 19:43:11,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=2709, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2913, PETRI_PLACES=180, PETRI_TRANSITIONS=281} [2023-08-29 19:43:11,303 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 132 predicate places. [2023-08-29 19:43:11,303 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 281 transitions, 2913 flow [2023-08-29 19:43:11,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 121.3125) internal successors, (1941), 16 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:11,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:11,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:11,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-29 19:43:11,305 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:11,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:11,305 INFO L85 PathProgramCache]: Analyzing trace with hash 36144378, now seen corresponding path program 1 times [2023-08-29 19:43:11,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:11,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446451588] [2023-08-29 19:43:11,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:11,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:11,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:11,353 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 19:43:11,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:11,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446451588] [2023-08-29 19:43:11,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446451588] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:43:11,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278849159] [2023-08-29 19:43:11,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:11,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:43:11,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:43:11,355 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 19:43:11,358 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 19:43:11,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:11,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 19:43:11,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:11,484 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 19:43:11,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:43:11,502 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 19:43:11,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278849159] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:43:11,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:43:11,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-29 19:43:11,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683406118] [2023-08-29 19:43:11,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:43:11,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 19:43:11,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:11,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 19:43:11,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-29 19:43:11,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 327 [2023-08-29 19:43:11,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 281 transitions, 2913 flow. Second operand has 7 states, 7 states have (on average 155.28571428571428) internal successors, (1087), 7 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:11,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:11,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 327 [2023-08-29 19:43:11,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:13,564 INFO L130 PetriNetUnfolder]: 6111/12492 cut-off events. [2023-08-29 19:43:13,564 INFO L131 PetriNetUnfolder]: For 29175/29199 co-relation queries the response was YES. [2023-08-29 19:43:13,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50017 conditions, 12492 events. 6111/12492 cut-off events. For 29175/29199 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 95065 event pairs, 2081 based on Foata normal form. 1782/14093 useless extension candidates. Maximal degree in co-relation 49961. Up to 3306 conditions per place. [2023-08-29 19:43:13,643 INFO L137 encePairwiseOnDemand]: 322/327 looper letters, 731 selfloop transitions, 20 changer transitions 0/789 dead transitions. [2023-08-29 19:43:13,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 789 transitions, 9867 flow [2023-08-29 19:43:13,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 19:43:13,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 19:43:13,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1036 transitions. [2023-08-29 19:43:13,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.528032619775739 [2023-08-29 19:43:13,645 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1036 transitions. [2023-08-29 19:43:13,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1036 transitions. [2023-08-29 19:43:13,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:13,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1036 transitions. [2023-08-29 19:43:13,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 172.66666666666666) internal successors, (1036), 6 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:13,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 327.0) internal successors, (2289), 7 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:13,650 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 327.0) internal successors, (2289), 7 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:13,650 INFO L175 Difference]: Start difference. First operand has 180 places, 281 transitions, 2913 flow. Second operand 6 states and 1036 transitions. [2023-08-29 19:43:13,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 789 transitions, 9867 flow [2023-08-29 19:43:13,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 789 transitions, 9711 flow, removed 2 selfloop flow, removed 10 redundant places. [2023-08-29 19:43:13,859 INFO L231 Difference]: Finished difference. Result has 179 places, 290 transitions, 3007 flow [2023-08-29 19:43:13,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=2843, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3007, PETRI_PLACES=179, PETRI_TRANSITIONS=290} [2023-08-29 19:43:13,860 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 131 predicate places. [2023-08-29 19:43:13,860 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 290 transitions, 3007 flow [2023-08-29 19:43:13,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 155.28571428571428) internal successors, (1087), 7 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:13,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:13,861 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:13,867 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 19:43:14,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:43:14,066 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:14,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:14,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1551124284, now seen corresponding path program 1 times [2023-08-29 19:43:14,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:14,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472967265] [2023-08-29 19:43:14,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:14,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:14,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:14,121 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-29 19:43:14,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:14,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472967265] [2023-08-29 19:43:14,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472967265] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:14,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:14,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:43:14,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633686750] [2023-08-29 19:43:14,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:14,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:43:14,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:14,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:43:14,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:43:14,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 327 [2023-08-29 19:43:14,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 290 transitions, 3007 flow. Second operand has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:14,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:14,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 327 [2023-08-29 19:43:14,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:16,112 INFO L130 PetriNetUnfolder]: 6166/12468 cut-off events. [2023-08-29 19:43:16,112 INFO L131 PetriNetUnfolder]: For 36524/36548 co-relation queries the response was YES. [2023-08-29 19:43:16,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53631 conditions, 12468 events. 6166/12468 cut-off events. For 36524/36548 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 92242 event pairs, 3463 based on Foata normal form. 426/12697 useless extension candidates. Maximal degree in co-relation 53572. Up to 8461 conditions per place. [2023-08-29 19:43:16,208 INFO L137 encePairwiseOnDemand]: 321/327 looper letters, 245 selfloop transitions, 37 changer transitions 0/311 dead transitions. [2023-08-29 19:43:16,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 311 transitions, 3710 flow [2023-08-29 19:43:16,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:43:16,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:43:16,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 503 transitions. [2023-08-29 19:43:16,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5127420998980632 [2023-08-29 19:43:16,209 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 503 transitions. [2023-08-29 19:43:16,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 503 transitions. [2023-08-29 19:43:16,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:16,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 503 transitions. [2023-08-29 19:43:16,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:16,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:16,212 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:16,212 INFO L175 Difference]: Start difference. First operand has 179 places, 290 transitions, 3007 flow. Second operand 3 states and 503 transitions. [2023-08-29 19:43:16,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 311 transitions, 3710 flow [2023-08-29 19:43:16,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 311 transitions, 3630 flow, removed 22 selfloop flow, removed 6 redundant places. [2023-08-29 19:43:16,396 INFO L231 Difference]: Finished difference. Result has 173 places, 267 transitions, 2921 flow [2023-08-29 19:43:16,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=2516, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2921, PETRI_PLACES=173, PETRI_TRANSITIONS=267} [2023-08-29 19:43:16,397 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 125 predicate places. [2023-08-29 19:43:16,397 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 267 transitions, 2921 flow [2023-08-29 19:43:16,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:16,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:16,397 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:16,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-29 19:43:16,398 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:16,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:16,398 INFO L85 PathProgramCache]: Analyzing trace with hash -53631562, now seen corresponding path program 1 times [2023-08-29 19:43:16,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:16,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540182644] [2023-08-29 19:43:16,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:16,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:16,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:16,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:16,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:16,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540182644] [2023-08-29 19:43:16,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540182644] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:43:16,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330758076] [2023-08-29 19:43:16,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:16,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:43:16,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:43:16,777 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 19:43:16,801 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 19:43:16,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:16,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-29 19:43:16,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:17,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:17,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:43:17,535 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:43:17,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 39 [2023-08-29 19:43:17,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:17,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330758076] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:43:17,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:43:17,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 33 [2023-08-29 19:43:17,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988711688] [2023-08-29 19:43:17,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:43:17,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-29 19:43:17,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:17,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-29 19:43:17,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2023-08-29 19:43:19,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 327 [2023-08-29 19:43:19,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 267 transitions, 2921 flow. Second operand has 35 states, 35 states have (on average 130.05714285714285) internal successors, (4552), 35 states have internal predecessors, (4552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:19,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:19,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 327 [2023-08-29 19:43:19,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:24,120 INFO L130 PetriNetUnfolder]: 6659/13084 cut-off events. [2023-08-29 19:43:24,121 INFO L131 PetriNetUnfolder]: For 42965/42965 co-relation queries the response was YES. [2023-08-29 19:43:24,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57194 conditions, 13084 events. 6659/13084 cut-off events. For 42965/42965 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 94768 event pairs, 913 based on Foata normal form. 118/13067 useless extension candidates. Maximal degree in co-relation 57136. Up to 4005 conditions per place. [2023-08-29 19:43:24,400 INFO L137 encePairwiseOnDemand]: 312/327 looper letters, 239 selfloop transitions, 247 changer transitions 0/486 dead transitions. [2023-08-29 19:43:24,400 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 486 transitions, 5204 flow [2023-08-29 19:43:24,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-29 19:43:24,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-29 19:43:24,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 4719 transitions. [2023-08-29 19:43:24,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41231979030144167 [2023-08-29 19:43:24,405 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 4719 transitions. [2023-08-29 19:43:24,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 4719 transitions. [2023-08-29 19:43:24,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:24,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 4719 transitions. [2023-08-29 19:43:24,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 134.82857142857142) internal successors, (4719), 35 states have internal predecessors, (4719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:24,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 327.0) internal successors, (11772), 36 states have internal predecessors, (11772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:24,422 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 327.0) internal successors, (11772), 36 states have internal predecessors, (11772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:24,423 INFO L175 Difference]: Start difference. First operand has 173 places, 267 transitions, 2921 flow. Second operand 35 states and 4719 transitions. [2023-08-29 19:43:24,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 486 transitions, 5204 flow [2023-08-29 19:43:24,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 486 transitions, 5083 flow, removed 14 selfloop flow, removed 3 redundant places. [2023-08-29 19:43:24,605 INFO L231 Difference]: Finished difference. Result has 203 places, 313 transitions, 3755 flow [2023-08-29 19:43:24,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=2783, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=3755, PETRI_PLACES=203, PETRI_TRANSITIONS=313} [2023-08-29 19:43:24,606 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 155 predicate places. [2023-08-29 19:43:24,606 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 313 transitions, 3755 flow [2023-08-29 19:43:24,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 130.05714285714285) internal successors, (4552), 35 states have internal predecessors, (4552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:24,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:24,607 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:24,613 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 19:43:24,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:43:24,807 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:24,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:24,808 INFO L85 PathProgramCache]: Analyzing trace with hash 2127084341, now seen corresponding path program 1 times [2023-08-29 19:43:24,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:24,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205751996] [2023-08-29 19:43:24,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:24,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:24,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:24,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 19:43:24,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:24,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205751996] [2023-08-29 19:43:24,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205751996] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:24,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:24,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-29 19:43:24,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307759000] [2023-08-29 19:43:24,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:24,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 19:43:24,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:24,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 19:43:24,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-29 19:43:24,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 327 [2023-08-29 19:43:24,992 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 313 transitions, 3755 flow. Second operand has 7 states, 7 states have (on average 143.28571428571428) internal successors, (1003), 7 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:24,992 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:24,992 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 327 [2023-08-29 19:43:24,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:26,960 INFO L130 PetriNetUnfolder]: 6734/13269 cut-off events. [2023-08-29 19:43:26,960 INFO L131 PetriNetUnfolder]: For 42780/42780 co-relation queries the response was YES. [2023-08-29 19:43:27,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60981 conditions, 13269 events. 6734/13269 cut-off events. For 42780/42780 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 96270 event pairs, 2316 based on Foata normal form. 76/13214 useless extension candidates. Maximal degree in co-relation 60924. Up to 7635 conditions per place. [2023-08-29 19:43:27,065 INFO L137 encePairwiseOnDemand]: 316/327 looper letters, 323 selfloop transitions, 74 changer transitions 0/397 dead transitions. [2023-08-29 19:43:27,065 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 397 transitions, 5195 flow [2023-08-29 19:43:27,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 19:43:27,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 19:43:27,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1077 transitions. [2023-08-29 19:43:27,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4705111402359109 [2023-08-29 19:43:27,067 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1077 transitions. [2023-08-29 19:43:27,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1077 transitions. [2023-08-29 19:43:27,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:27,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1077 transitions. [2023-08-29 19:43:27,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 153.85714285714286) internal successors, (1077), 7 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:27,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 327.0) internal successors, (2616), 8 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:27,070 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 327.0) internal successors, (2616), 8 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:27,070 INFO L175 Difference]: Start difference. First operand has 203 places, 313 transitions, 3755 flow. Second operand 7 states and 1077 transitions. [2023-08-29 19:43:27,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 397 transitions, 5195 flow [2023-08-29 19:43:27,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 397 transitions, 4519 flow, removed 196 selfloop flow, removed 16 redundant places. [2023-08-29 19:43:27,331 INFO L231 Difference]: Finished difference. Result has 197 places, 314 transitions, 3419 flow [2023-08-29 19:43:27,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=2996, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3419, PETRI_PLACES=197, PETRI_TRANSITIONS=314} [2023-08-29 19:43:27,332 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 149 predicate places. [2023-08-29 19:43:27,332 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 314 transitions, 3419 flow [2023-08-29 19:43:27,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 143.28571428571428) internal successors, (1003), 7 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:27,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:27,333 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2023-08-29 19:43:27,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-29 19:43:27,333 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:27,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:27,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1366491074, now seen corresponding path program 2 times [2023-08-29 19:43:27,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:27,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482768286] [2023-08-29 19:43:27,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:27,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:27,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:28,235 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:28,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:28,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482768286] [2023-08-29 19:43:28,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482768286] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:43:28,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37474811] [2023-08-29 19:43:28,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 19:43:28,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:43:28,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:43:28,243 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 19:43:28,246 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 19:43:28,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 19:43:28,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:43:28,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-29 19:43:28,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:28,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:43:28,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:43:28,393 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 19:43:28,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2023-08-29 19:43:28,412 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-29 19:43:28,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-29 19:43:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:28,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:43:29,310 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:29,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37474811] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:43:29,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:43:29,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11, 9] total 40 [2023-08-29 19:43:29,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729991575] [2023-08-29 19:43:29,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:43:29,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-29 19:43:29,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:29,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-29 19:43:29,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1557, Unknown=0, NotChecked=0, Total=1722 [2023-08-29 19:43:33,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 327 [2023-08-29 19:43:33,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 314 transitions, 3419 flow. Second operand has 42 states, 42 states have (on average 136.92857142857142) internal successors, (5751), 42 states have internal predecessors, (5751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:33,376 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:33,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 327 [2023-08-29 19:43:33,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:39,000 INFO L130 PetriNetUnfolder]: 9424/18567 cut-off events. [2023-08-29 19:43:39,000 INFO L131 PetriNetUnfolder]: For 56609/56609 co-relation queries the response was YES. [2023-08-29 19:43:39,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82085 conditions, 18567 events. 9424/18567 cut-off events. For 56609/56609 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 135589 event pairs, 2920 based on Foata normal form. 234/18494 useless extension candidates. Maximal degree in co-relation 82028. Up to 10753 conditions per place. [2023-08-29 19:43:39,127 INFO L137 encePairwiseOnDemand]: 316/327 looper letters, 594 selfloop transitions, 136 changer transitions 0/730 dead transitions. [2023-08-29 19:43:39,128 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 730 transitions, 8164 flow [2023-08-29 19:43:39,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-29 19:43:39,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-29 19:43:39,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 4375 transitions. [2023-08-29 19:43:39,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445973496432212 [2023-08-29 19:43:39,132 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 4375 transitions. [2023-08-29 19:43:39,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 4375 transitions. [2023-08-29 19:43:39,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:39,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 4375 transitions. [2023-08-29 19:43:39,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 145.83333333333334) internal successors, (4375), 30 states have internal predecessors, (4375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:39,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 327.0) internal successors, (10137), 31 states have internal predecessors, (10137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:39,141 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 327.0) internal successors, (10137), 31 states have internal predecessors, (10137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:39,141 INFO L175 Difference]: Start difference. First operand has 197 places, 314 transitions, 3419 flow. Second operand 30 states and 4375 transitions. [2023-08-29 19:43:39,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 730 transitions, 8164 flow [2023-08-29 19:43:39,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 730 transitions, 8126 flow, removed 17 selfloop flow, removed 1 redundant places. [2023-08-29 19:43:39,478 INFO L231 Difference]: Finished difference. Result has 237 places, 399 transitions, 4929 flow [2023-08-29 19:43:39,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=3363, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=4929, PETRI_PLACES=237, PETRI_TRANSITIONS=399} [2023-08-29 19:43:39,478 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 189 predicate places. [2023-08-29 19:43:39,478 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 399 transitions, 4929 flow [2023-08-29 19:43:39,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 136.92857142857142) internal successors, (5751), 42 states have internal predecessors, (5751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:39,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:39,479 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:39,488 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 19:43:39,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-29 19:43:39,688 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:39,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:39,689 INFO L85 PathProgramCache]: Analyzing trace with hash 732416370, now seen corresponding path program 4 times [2023-08-29 19:43:39,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:39,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822262456] [2023-08-29 19:43:39,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:39,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:39,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:42,007 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:42,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:42,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822262456] [2023-08-29 19:43:42,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822262456] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:43:42,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560844525] [2023-08-29 19:43:42,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 19:43:42,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:43:42,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:43:42,009 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 19:43:42,011 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 19:43:42,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 19:43:42,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:43:42,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 68 conjunts are in the unsatisfiable core [2023-08-29 19:43:42,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:42,150 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 19:43:42,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-08-29 19:43:42,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-29 19:43:42,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2023-08-29 19:43:43,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 43 [2023-08-29 19:43:43,486 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:43,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:43:43,950 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_646 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_646) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2023-08-29 19:43:43,958 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:43:43,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-29 19:43:43,967 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:43:43,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2023-08-29 19:43:43,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-08-29 19:43:44,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:43:44,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560844525] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:43:44,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:43:44,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 14] total 50 [2023-08-29 19:43:44,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267427791] [2023-08-29 19:43:44,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:43:44,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-08-29 19:43:44,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:44,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-08-29 19:43:44,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2359, Unknown=1, NotChecked=98, Total=2652 [2023-08-29 19:43:44,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 327 [2023-08-29 19:43:44,482 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 399 transitions, 4929 flow. Second operand has 52 states, 52 states have (on average 88.61538461538461) internal successors, (4608), 52 states have internal predecessors, (4608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:44,482 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:44,482 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 327 [2023-08-29 19:43:44,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:13,733 INFO L130 PetriNetUnfolder]: 11673/23042 cut-off events. [2023-08-29 19:44:13,733 INFO L131 PetriNetUnfolder]: For 80460/80460 co-relation queries the response was YES. [2023-08-29 19:44:13,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105262 conditions, 23042 events. 11673/23042 cut-off events. For 80460/80460 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 178448 event pairs, 1492 based on Foata normal form. 90/22754 useless extension candidates. Maximal degree in co-relation 105193. Up to 5172 conditions per place. [2023-08-29 19:44:14,017 INFO L137 encePairwiseOnDemand]: 308/327 looper letters, 442 selfloop transitions, 552 changer transitions 0/994 dead transitions. [2023-08-29 19:44:14,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 994 transitions, 11042 flow [2023-08-29 19:44:14,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-08-29 19:44:14,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2023-08-29 19:44:14,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 8609 transitions. [2023-08-29 19:44:14,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28308835618690603 [2023-08-29 19:44:14,026 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 8609 transitions. [2023-08-29 19:44:14,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 8609 transitions. [2023-08-29 19:44:14,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:14,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 8609 transitions. [2023-08-29 19:44:14,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 92.56989247311827) internal successors, (8609), 93 states have internal predecessors, (8609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:14,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 327.0) internal successors, (30738), 94 states have internal predecessors, (30738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:14,062 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 327.0) internal successors, (30738), 94 states have internal predecessors, (30738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:14,062 INFO L175 Difference]: Start difference. First operand has 237 places, 399 transitions, 4929 flow. Second operand 93 states and 8609 transitions. [2023-08-29 19:44:14,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 994 transitions, 11042 flow [2023-08-29 19:44:14,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 994 transitions, 10811 flow, removed 87 selfloop flow, removed 10 redundant places. [2023-08-29 19:44:14,614 INFO L231 Difference]: Finished difference. Result has 325 places, 610 transitions, 8164 flow [2023-08-29 19:44:14,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=4698, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=347, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=8164, PETRI_PLACES=325, PETRI_TRANSITIONS=610} [2023-08-29 19:44:14,615 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 277 predicate places. [2023-08-29 19:44:14,615 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 610 transitions, 8164 flow [2023-08-29 19:44:14,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 88.61538461538461) internal successors, (4608), 52 states have internal predecessors, (4608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:14,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:14,616 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:44:14,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-29 19:44:14,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:44:14,822 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:14,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:14,822 INFO L85 PathProgramCache]: Analyzing trace with hash -894263952, now seen corresponding path program 2 times [2023-08-29 19:44:14,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:44:14,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613553398] [2023-08-29 19:44:14,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:14,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:44:14,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:15,475 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:44:15,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:44:15,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613553398] [2023-08-29 19:44:15,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613553398] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:44:15,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121732232] [2023-08-29 19:44:15,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 19:44:15,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:44:15,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:44:15,477 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:44:15,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-29 19:44:15,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 19:44:15,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:44:15,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-29 19:44:15,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:44:15,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:44:15,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:44:15,634 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 19:44:15,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2023-08-29 19:44:15,663 INFO L321 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-08-29 19:44:15,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2023-08-29 19:44:16,092 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:44:16,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:44:16,675 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:44:16,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121732232] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:44:16,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:44:16,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 9] total 39 [2023-08-29 19:44:16,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103636064] [2023-08-29 19:44:16,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:44:16,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-29 19:44:16,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:44:16,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-29 19:44:16,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1484, Unknown=0, NotChecked=0, Total=1640 [2023-08-29 19:44:20,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 327 [2023-08-29 19:44:20,382 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 610 transitions, 8164 flow. Second operand has 41 states, 41 states have (on average 129.26829268292684) internal successors, (5300), 41 states have internal predecessors, (5300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:20,382 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:20,382 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 327 [2023-08-29 19:44:20,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:27,820 INFO L130 PetriNetUnfolder]: 13677/27010 cut-off events. [2023-08-29 19:44:27,821 INFO L131 PetriNetUnfolder]: For 99442/99442 co-relation queries the response was YES. [2023-08-29 19:44:27,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131079 conditions, 27010 events. 13677/27010 cut-off events. For 99442/99442 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 216428 event pairs, 3488 based on Foata normal form. 80/26684 useless extension candidates. Maximal degree in co-relation 131003. Up to 15132 conditions per place. [2023-08-29 19:44:28,049 INFO L137 encePairwiseOnDemand]: 313/327 looper letters, 808 selfloop transitions, 171 changer transitions 0/979 dead transitions. [2023-08-29 19:44:28,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 979 transitions, 13381 flow [2023-08-29 19:44:28,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-29 19:44:28,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-29 19:44:28,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3956 transitions. [2023-08-29 19:44:28,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4171675630074871 [2023-08-29 19:44:28,053 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3956 transitions. [2023-08-29 19:44:28,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3956 transitions. [2023-08-29 19:44:28,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:28,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3956 transitions. [2023-08-29 19:44:28,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 136.41379310344828) internal successors, (3956), 29 states have internal predecessors, (3956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:28,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 327.0) internal successors, (9810), 30 states have internal predecessors, (9810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:28,065 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 327.0) internal successors, (9810), 30 states have internal predecessors, (9810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:28,065 INFO L175 Difference]: Start difference. First operand has 325 places, 610 transitions, 8164 flow. Second operand 29 states and 3956 transitions. [2023-08-29 19:44:28,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 979 transitions, 13381 flow [2023-08-29 19:44:28,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 979 transitions, 12180 flow, removed 383 selfloop flow, removed 31 redundant places. [2023-08-29 19:44:28,873 INFO L231 Difference]: Finished difference. Result has 334 places, 688 transitions, 8828 flow [2023-08-29 19:44:28,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=7132, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=8828, PETRI_PLACES=334, PETRI_TRANSITIONS=688} [2023-08-29 19:44:28,873 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 286 predicate places. [2023-08-29 19:44:28,873 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 688 transitions, 8828 flow [2023-08-29 19:44:28,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 129.26829268292684) internal successors, (5300), 41 states have internal predecessors, (5300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:28,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:28,874 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:44:28,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-29 19:44:29,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:44:29,075 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:29,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:29,075 INFO L85 PathProgramCache]: Analyzing trace with hash -2078093252, now seen corresponding path program 2 times [2023-08-29 19:44:29,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:44:29,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652531230] [2023-08-29 19:44:29,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:29,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:44:29,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:29,123 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-29 19:44:29,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:44:29,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652531230] [2023-08-29 19:44:29,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652531230] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:44:29,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787856901] [2023-08-29 19:44:29,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 19:44:29,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:44:29,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:44:29,125 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:44:29,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-29 19:44:29,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 19:44:29,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:44:29,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 19:44:29,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:44:29,425 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-29 19:44:29,426 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:44:29,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787856901] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:44:29,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 19:44:29,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-08-29 19:44:29,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033969766] [2023-08-29 19:44:29,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:44:29,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:44:29,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:44:29,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:44:29,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:44:29,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 327 [2023-08-29 19:44:29,481 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 688 transitions, 8828 flow. Second operand has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:29,482 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:29,482 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 327 [2023-08-29 19:44:29,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:34,780 INFO L130 PetriNetUnfolder]: 12187/25177 cut-off events. [2023-08-29 19:44:34,780 INFO L131 PetriNetUnfolder]: For 87484/87591 co-relation queries the response was YES. [2023-08-29 19:44:34,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118785 conditions, 25177 events. 12187/25177 cut-off events. For 87484/87591 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 209923 event pairs, 9819 based on Foata normal form. 90/24798 useless extension candidates. Maximal degree in co-relation 118707. Up to 23802 conditions per place. [2023-08-29 19:44:35,035 INFO L137 encePairwiseOnDemand]: 325/327 looper letters, 574 selfloop transitions, 1 changer transitions 1/676 dead transitions. [2023-08-29 19:44:35,035 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 676 transitions, 9902 flow [2023-08-29 19:44:35,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:44:35,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:44:35,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2023-08-29 19:44:35,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47604485219164117 [2023-08-29 19:44:35,036 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2023-08-29 19:44:35,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2023-08-29 19:44:35,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:35,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2023-08-29 19:44:35,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:35,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:35,038 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:35,038 INFO L175 Difference]: Start difference. First operand has 334 places, 688 transitions, 8828 flow. Second operand 3 states and 467 transitions. [2023-08-29 19:44:35,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 676 transitions, 9902 flow [2023-08-29 19:44:35,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 676 transitions, 9795 flow, removed 26 selfloop flow, removed 9 redundant places. [2023-08-29 19:44:35,884 INFO L231 Difference]: Finished difference. Result has 314 places, 675 transitions, 8642 flow [2023-08-29 19:44:35,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=8643, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=675, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=8642, PETRI_PLACES=314, PETRI_TRANSITIONS=675} [2023-08-29 19:44:35,885 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 266 predicate places. [2023-08-29 19:44:35,885 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 675 transitions, 8642 flow [2023-08-29 19:44:35,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:35,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:35,885 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:44:35,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-29 19:44:36,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-29 19:44:36,086 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:36,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:36,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1972717191, now seen corresponding path program 1 times [2023-08-29 19:44:36,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:44:36,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604792575] [2023-08-29 19:44:36,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:36,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:44:36,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:36,978 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:44:36,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:44:36,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604792575] [2023-08-29 19:44:36,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604792575] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:44:36,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418333589] [2023-08-29 19:44:36,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:36,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:44:36,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:44:36,980 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:44:36,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-29 19:44:37,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:37,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 79 conjunts are in the unsatisfiable core [2023-08-29 19:44:37,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:44:37,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-29 19:44:37,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:44:37,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 36 [2023-08-29 19:44:38,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 43 [2023-08-29 19:44:38,350 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:44:38,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:44:39,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2023-08-29 19:44:39,285 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:44:39,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418333589] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:44:39,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:44:39,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 19] total 58 [2023-08-29 19:44:39,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419244973] [2023-08-29 19:44:39,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:44:39,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-08-29 19:44:39,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:44:39,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-08-29 19:44:39,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=3215, Unknown=0, NotChecked=0, Total=3422 [2023-08-29 19:44:43,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:44:46,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:44:49,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:44:58,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 327 [2023-08-29 19:44:58,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 675 transitions, 8642 flow. Second operand has 59 states, 59 states have (on average 120.83050847457628) internal successors, (7129), 59 states have internal predecessors, (7129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:58,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:58,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 327 [2023-08-29 19:44:58,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:45:56,700 INFO L130 PetriNetUnfolder]: 22290/43807 cut-off events. [2023-08-29 19:45:56,700 INFO L131 PetriNetUnfolder]: For 147048/147048 co-relation queries the response was YES. [2023-08-29 19:45:57,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205161 conditions, 43807 events. 22290/43807 cut-off events. For 147048/147048 co-relation queries the response was YES. Maximal size of possible extension queue 816. Compared 383948 event pairs, 3812 based on Foata normal form. 284/43567 useless extension candidates. Maximal degree in co-relation 205082. Up to 8549 conditions per place. [2023-08-29 19:45:57,379 INFO L137 encePairwiseOnDemand]: 307/327 looper letters, 666 selfloop transitions, 1185 changer transitions 127/1978 dead transitions. [2023-08-29 19:45:57,379 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 1978 transitions, 23977 flow [2023-08-29 19:45:57,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2023-08-29 19:45:57,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2023-08-29 19:45:57,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 22460 transitions. [2023-08-29 19:45:57,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37947522259955735 [2023-08-29 19:45:57,400 INFO L72 ComplementDD]: Start complementDD. Operand 181 states and 22460 transitions. [2023-08-29 19:45:57,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 181 states and 22460 transitions. [2023-08-29 19:45:57,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:45:57,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 181 states and 22460 transitions. [2023-08-29 19:45:57,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 182 states, 181 states have (on average 124.08839779005525) internal successors, (22460), 181 states have internal predecessors, (22460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:45:57,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 182 states, 182 states have (on average 327.0) internal successors, (59514), 182 states have internal predecessors, (59514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:45:57,481 INFO L81 ComplementDD]: Finished complementDD. Result has 182 states, 182 states have (on average 327.0) internal successors, (59514), 182 states have internal predecessors, (59514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:45:57,481 INFO L175 Difference]: Start difference. First operand has 314 places, 675 transitions, 8642 flow. Second operand 181 states and 22460 transitions. [2023-08-29 19:45:57,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 1978 transitions, 23977 flow [2023-08-29 19:45:58,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 1978 transitions, 23972 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-29 19:45:59,001 INFO L231 Difference]: Finished difference. Result has 505 places, 1297 transitions, 19351 flow [2023-08-29 19:45:59,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=8639, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=575, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=181, PETRI_FLOW=19351, PETRI_PLACES=505, PETRI_TRANSITIONS=1297} [2023-08-29 19:45:59,002 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 457 predicate places. [2023-08-29 19:45:59,002 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 1297 transitions, 19351 flow [2023-08-29 19:45:59,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 120.83050847457628) internal successors, (7129), 59 states have internal predecessors, (7129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:45:59,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:45:59,003 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:45:59,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-29 19:45:59,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-29 19:45:59,204 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:45:59,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:45:59,204 INFO L85 PathProgramCache]: Analyzing trace with hash 796650369, now seen corresponding path program 2 times [2023-08-29 19:45:59,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:45:59,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968584144] [2023-08-29 19:45:59,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:45:59,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:45:59,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:46:01,334 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:46:01,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:46:01,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968584144] [2023-08-29 19:46:01,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968584144] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:46:01,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144323655] [2023-08-29 19:46:01,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 19:46:01,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:46:01,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:46:01,335 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:46:01,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-29 19:46:01,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 19:46:01,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:46:01,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 91 conjunts are in the unsatisfiable core [2023-08-29 19:46:01,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:46:01,479 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 19:46:01,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-08-29 19:46:01,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-29 19:46:01,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2023-08-29 19:46:02,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 32 [2023-08-29 19:46:03,795 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 19:46:03,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 43 [2023-08-29 19:46:03,906 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:46:03,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:46:06,492 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:46:06,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2023-08-29 19:46:06,507 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:46:06,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 54 [2023-08-29 19:46:06,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 22 [2023-08-29 19:46:07,086 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:46:07,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144323655] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:46:07,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:46:07,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 21] total 67 [2023-08-29 19:46:07,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673297480] [2023-08-29 19:46:07,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:46:07,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-08-29 19:46:07,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:46:07,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-08-29 19:46:07,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=4285, Unknown=5, NotChecked=0, Total=4692 [2023-08-29 19:46:21,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 327 [2023-08-29 19:46:21,193 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 1297 transitions, 19351 flow. Second operand has 69 states, 69 states have (on average 91.56521739130434) internal successors, (6318), 69 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:46:21,193 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:46:21,193 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 327 [2023-08-29 19:46:21,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:46:36,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:46:38,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:46:40,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:46:47,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:46:55,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:46:57,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:46:59,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:47:09,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:47:11,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:47:14,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:47:16,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:47:18,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:47:19,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:47:22,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:47:25,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:47:32,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:47:34,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:47:38,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:47:47,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:47:49,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:48:01,879 INFO L130 PetriNetUnfolder]: 26436/51803 cut-off events. [2023-08-29 19:48:01,880 INFO L131 PetriNetUnfolder]: For 210581/210581 co-relation queries the response was YES. [2023-08-29 19:48:02,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265495 conditions, 51803 events. 26436/51803 cut-off events. For 210581/210581 co-relation queries the response was YES. Maximal size of possible extension queue 921. Compared 460859 event pairs, 6118 based on Foata normal form. 44/51247 useless extension candidates. Maximal degree in co-relation 265403. Up to 25993 conditions per place. [2023-08-29 19:48:02,865 INFO L137 encePairwiseOnDemand]: 306/327 looper letters, 1424 selfloop transitions, 724 changer transitions 165/2313 dead transitions. [2023-08-29 19:48:02,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 596 places, 2313 transitions, 34614 flow [2023-08-29 19:48:02,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2023-08-29 19:48:02,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2023-08-29 19:48:02,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 8876 transitions. [2023-08-29 19:48:02,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2950405531179364 [2023-08-29 19:48:02,874 INFO L72 ComplementDD]: Start complementDD. Operand 92 states and 8876 transitions. [2023-08-29 19:48:02,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 92 states and 8876 transitions. [2023-08-29 19:48:02,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:48:02,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 92 states and 8876 transitions. [2023-08-29 19:48:02,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 93 states, 92 states have (on average 96.47826086956522) internal successors, (8876), 92 states have internal predecessors, (8876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:02,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 93 states, 93 states have (on average 327.0) internal successors, (30411), 93 states have internal predecessors, (30411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:02,906 INFO L81 ComplementDD]: Finished complementDD. Result has 93 states, 93 states have (on average 327.0) internal successors, (30411), 93 states have internal predecessors, (30411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:02,907 INFO L175 Difference]: Start difference. First operand has 505 places, 1297 transitions, 19351 flow. Second operand 92 states and 8876 transitions. [2023-08-29 19:48:02,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 596 places, 2313 transitions, 34614 flow [2023-08-29 19:48:06,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 2313 transitions, 32926 flow, removed 494 selfloop flow, removed 30 redundant places. [2023-08-29 19:48:06,311 INFO L231 Difference]: Finished difference. Result has 590 places, 1734 transitions, 26317 flow [2023-08-29 19:48:06,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=18180, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=382, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=828, PETRI_DIFFERENCE_SUBTRAHEND_STATES=92, PETRI_FLOW=26317, PETRI_PLACES=590, PETRI_TRANSITIONS=1734} [2023-08-29 19:48:06,313 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 542 predicate places. [2023-08-29 19:48:06,313 INFO L495 AbstractCegarLoop]: Abstraction has has 590 places, 1734 transitions, 26317 flow [2023-08-29 19:48:06,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 91.56521739130434) internal successors, (6318), 69 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:06,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:48:06,314 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:48:06,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-29 19:48:06,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-29 19:48:06,520 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:48:06,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:48:06,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1510973619, now seen corresponding path program 3 times [2023-08-29 19:48:06,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:48:06,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556937388] [2023-08-29 19:48:06,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:48:06,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:48:06,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:48:08,398 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:48:08,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:48:08,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556937388] [2023-08-29 19:48:08,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556937388] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:48:08,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654333906] [2023-08-29 19:48:08,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 19:48:08,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:48:08,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:48:08,399 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:48:08,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-29 19:48:08,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-29 19:48:08,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:48:08,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 96 conjunts are in the unsatisfiable core [2023-08-29 19:48:08,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:48:08,635 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-29 19:48:08,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-29 19:48:09,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-29 19:48:09,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2023-08-29 19:48:09,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 32 [2023-08-29 19:48:11,089 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 19:48:11,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 43 [2023-08-29 19:48:11,224 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:48:11,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:48:12,886 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1002 Int) (v_ArrVal_1000 (Array Int Int)) (v_~top~0_94 Int)) (let ((.cse0 (* v_~top~0_94 4))) (or (< c_~top~0 v_~top~0_94) (< (+ .cse0 |c_~#arr~0.offset|) 4) (not (= 4294967294 (mod (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1000))) (store .cse1 |c_t1Thread1of1ForFork1_push_~stack#1.base| (store (select .cse1 |c_t1Thread1of1ForFork1_push_~stack#1.base|) (+ |c_t1Thread1of1ForFork1_push_~stack#1.offset| (* c_~top~0 4)) v_ArrVal_1002))) |c_~#arr~0.base|) (+ .cse0 |c_~#arr~0.offset| (- 4))) 4294967296)))))) is different from false [2023-08-29 19:48:12,919 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1002 Int) (v_ArrVal_1000 (Array Int Int)) (v_~top~0_94 Int)) (let ((.cse0 (* v_~top~0_94 4))) (or (< c_~top~0 v_~top~0_94) (< (+ .cse0 |c_~#arr~0.offset|) 4) (not (= 4294967294 (mod (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1000))) (store .cse1 |c_t1Thread1of1ForFork1_push_#in~stack#1.base| (store (select .cse1 |c_t1Thread1of1ForFork1_push_#in~stack#1.base|) (+ |c_t1Thread1of1ForFork1_push_#in~stack#1.offset| (* c_~top~0 4)) v_ArrVal_1002))) |c_~#arr~0.base|) (+ .cse0 |c_~#arr~0.offset| (- 4))) 4294967296)))))) is different from false [2023-08-29 19:48:12,945 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1002 Int) (v_ArrVal_1000 (Array Int Int)) (v_~top~0_94 Int)) (let ((.cse0 (* v_~top~0_94 4))) (or (< c_~top~0 v_~top~0_94) (< (+ .cse0 |c_~#arr~0.offset|) 4) (not (= (mod (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1000) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4)) v_ArrVal_1002) (+ .cse0 |c_~#arr~0.offset| (- 4))) 4294967296) 4294967294))))) is different from false [2023-08-29 19:48:15,536 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:48:15,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 39 [2023-08-29 19:48:15,549 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:48:15,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 71 [2023-08-29 19:48:15,554 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 19:48:15,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 37 [2023-08-29 19:48:15,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2023-08-29 19:48:15,580 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 19:48:15,589 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:48:15,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 48 [2023-08-29 19:48:16,303 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-08-29 19:48:16,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654333906] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:48:16,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:48:16,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 22] total 66 [2023-08-29 19:48:16,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958159721] [2023-08-29 19:48:16,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:48:16,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-08-29 19:48:16,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:48:16,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-08-29 19:48:16,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=3823, Unknown=16, NotChecked=384, Total=4556 [2023-08-29 19:48:16,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 327 [2023-08-29 19:48:16,899 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 590 places, 1734 transitions, 26317 flow. Second operand has 68 states, 68 states have (on average 88.58823529411765) internal successors, (6024), 68 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:16,899 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:48:16,900 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 327 [2023-08-29 19:48:16,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:48:43,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:49:12,596 INFO L130 PetriNetUnfolder]: 29748/58299 cut-off events. [2023-08-29 19:49:12,596 INFO L131 PetriNetUnfolder]: For 265919/265919 co-relation queries the response was YES. [2023-08-29 19:49:14,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303887 conditions, 58299 events. 29748/58299 cut-off events. For 265919/265919 co-relation queries the response was YES. Maximal size of possible extension queue 1045. Compared 527599 event pairs, 11901 based on Foata normal form. 26/57437 useless extension candidates. Maximal degree in co-relation 303777. Up to 45729 conditions per place. [2023-08-29 19:49:14,174 INFO L137 encePairwiseOnDemand]: 302/327 looper letters, 1927 selfloop transitions, 411 changer transitions 108/2446 dead transitions. [2023-08-29 19:49:14,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 662 places, 2446 transitions, 38690 flow [2023-08-29 19:49:14,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-08-29 19:49:14,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2023-08-29 19:49:14,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 6794 transitions. [2023-08-29 19:49:14,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2846131289011772 [2023-08-29 19:49:14,181 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 6794 transitions. [2023-08-29 19:49:14,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 6794 transitions. [2023-08-29 19:49:14,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:49:14,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 6794 transitions. [2023-08-29 19:49:14,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 93.06849315068493) internal successors, (6794), 73 states have internal predecessors, (6794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:14,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 327.0) internal successors, (24198), 74 states have internal predecessors, (24198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:14,211 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 327.0) internal successors, (24198), 74 states have internal predecessors, (24198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:14,211 INFO L175 Difference]: Start difference. First operand has 590 places, 1734 transitions, 26317 flow. Second operand 73 states and 6794 transitions. [2023-08-29 19:49:14,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 662 places, 2446 transitions, 38690 flow [2023-08-29 19:49:19,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 652 places, 2446 transitions, 38195 flow, removed 215 selfloop flow, removed 10 redundant places. [2023-08-29 19:49:19,113 INFO L231 Difference]: Finished difference. Result has 687 places, 1958 transitions, 30361 flow [2023-08-29 19:49:19,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=25978, PETRI_DIFFERENCE_MINUEND_PLACES=580, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=30361, PETRI_PLACES=687, PETRI_TRANSITIONS=1958} [2023-08-29 19:49:19,115 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 639 predicate places. [2023-08-29 19:49:19,115 INFO L495 AbstractCegarLoop]: Abstraction has has 687 places, 1958 transitions, 30361 flow [2023-08-29 19:49:19,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 88.58823529411765) internal successors, (6024), 68 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:19,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:49:19,117 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:49:19,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-29 19:49:19,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-29 19:49:19,325 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:49:19,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:49:19,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1892552667, now seen corresponding path program 4 times [2023-08-29 19:49:19,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:49:19,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509941232] [2023-08-29 19:49:19,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:49:19,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:49:19,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:49:21,272 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:49:21,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:49:21,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509941232] [2023-08-29 19:49:21,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509941232] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:49:21,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515934295] [2023-08-29 19:49:21,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 19:49:21,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:49:21,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:49:21,274 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:49:21,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-29 19:49:21,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 19:49:21,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:49:21,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 88 conjunts are in the unsatisfiable core [2023-08-29 19:49:21,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:49:21,431 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-29 19:49:21,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-29 19:49:21,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-08-29 19:49:22,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:49:22,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 37 [2023-08-29 19:49:23,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 53 [2023-08-29 19:49:24,779 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 19:49:24,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 44 [2023-08-29 19:49:24,914 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:49:24,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:49:26,839 INFO L321 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2023-08-29 19:49:26,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 62 [2023-08-29 19:49:26,851 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:49:26,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 71 [2023-08-29 19:49:26,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-08-29 19:49:27,633 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:49:27,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515934295] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:49:27,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:49:27,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22, 22] total 70 [2023-08-29 19:49:27,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007200241] [2023-08-29 19:49:27,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:49:27,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-08-29 19:49:27,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:49:27,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-08-29 19:49:27,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=4744, Unknown=23, NotChecked=0, Total=5112 [2023-08-29 19:49:31,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 327 [2023-08-29 19:49:31,014 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 687 places, 1958 transitions, 30361 flow. Second operand has 72 states, 72 states have (on average 82.5) internal successors, (5940), 72 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:31,014 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:49:31,014 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 327 [2023-08-29 19:49:31,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:50:18,553 INFO L130 PetriNetUnfolder]: 27661/54697 cut-off events. [2023-08-29 19:50:18,554 INFO L131 PetriNetUnfolder]: For 506007/506007 co-relation queries the response was YES. [2023-08-29 19:50:20,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373960 conditions, 54697 events. 27661/54697 cut-off events. For 506007/506007 co-relation queries the response was YES. Maximal size of possible extension queue 974. Compared 494543 event pairs, 8393 based on Foata normal form. 465/54426 useless extension candidates. Maximal degree in co-relation 373819. Up to 31532 conditions per place. [2023-08-29 19:50:20,473 INFO L137 encePairwiseOnDemand]: 307/327 looper letters, 1234 selfloop transitions, 778 changer transitions 82/2094 dead transitions. [2023-08-29 19:50:20,473 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 726 places, 2094 transitions, 35330 flow [2023-08-29 19:50:20,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-08-29 19:50:20,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-08-29 19:50:20,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 5555 transitions. [2023-08-29 19:50:20,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26543386850152906 [2023-08-29 19:50:20,477 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 5555 transitions. [2023-08-29 19:50:20,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 5555 transitions. [2023-08-29 19:50:20,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:50:20,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 5555 transitions. [2023-08-29 19:50:20,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 86.796875) internal successors, (5555), 64 states have internal predecessors, (5555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:20,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 327.0) internal successors, (21255), 65 states have internal predecessors, (21255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:20,490 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 327.0) internal successors, (21255), 65 states have internal predecessors, (21255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:20,490 INFO L175 Difference]: Start difference. First operand has 687 places, 1958 transitions, 30361 flow. Second operand 64 states and 5555 transitions. [2023-08-29 19:50:20,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 726 places, 2094 transitions, 35330 flow [2023-08-29 19:50:26,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 695 places, 2094 transitions, 34634 flow, removed 168 selfloop flow, removed 31 redundant places. [2023-08-29 19:50:26,667 INFO L231 Difference]: Finished difference. Result has 721 places, 1843 transitions, 30875 flow [2023-08-29 19:50:26,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=26036, PETRI_DIFFERENCE_MINUEND_PLACES=632, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=652, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=939, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=30875, PETRI_PLACES=721, PETRI_TRANSITIONS=1843} [2023-08-29 19:50:26,669 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 673 predicate places. [2023-08-29 19:50:26,669 INFO L495 AbstractCegarLoop]: Abstraction has has 721 places, 1843 transitions, 30875 flow [2023-08-29 19:50:26,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 82.5) internal successors, (5940), 72 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:26,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:50:26,670 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:50:26,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-29 19:50:26,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:50:26,879 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:50:26,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:50:26,879 INFO L85 PathProgramCache]: Analyzing trace with hash -956500555, now seen corresponding path program 2 times [2023-08-29 19:50:26,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:50:26,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23267002] [2023-08-29 19:50:26,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:50:26,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:50:26,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:50:27,205 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 19:50:27,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:50:27,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23267002] [2023-08-29 19:50:27,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23267002] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:50:27,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12787779] [2023-08-29 19:50:27,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 19:50:27,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:50:27,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:50:27,209 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:50:27,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-29 19:50:27,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 19:50:27,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:50:27,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-29 19:50:27,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:50:27,464 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 19:50:27,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:50:27,648 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 19:50:27,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12787779] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:50:27,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:50:27,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 21 [2023-08-29 19:50:27,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863643471] [2023-08-29 19:50:27,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:50:27,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-29 19:50:27,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:50:27,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-29 19:50:27,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2023-08-29 19:50:27,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 327 [2023-08-29 19:50:27,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 721 places, 1843 transitions, 30875 flow. Second operand has 22 states, 22 states have (on average 142.04545454545453) internal successors, (3125), 22 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:27,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:50:27,835 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 327 [2023-08-29 19:50:27,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:50:58,004 INFO L130 PetriNetUnfolder]: 29841/58947 cut-off events. [2023-08-29 19:50:58,004 INFO L131 PetriNetUnfolder]: For 631014/631014 co-relation queries the response was YES. [2023-08-29 19:51:00,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421860 conditions, 58947 events. 29841/58947 cut-off events. For 631014/631014 co-relation queries the response was YES. Maximal size of possible extension queue 1028. Compared 532295 event pairs, 7595 based on Foata normal form. 260/58585 useless extension candidates. Maximal degree in co-relation 421703. Up to 26329 conditions per place. [2023-08-29 19:51:00,376 INFO L137 encePairwiseOnDemand]: 316/327 looper letters, 1421 selfloop transitions, 1051 changer transitions 9/2481 dead transitions. [2023-08-29 19:51:00,376 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 740 places, 2481 transitions, 45380 flow [2023-08-29 19:51:00,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-29 19:51:00,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-29 19:51:00,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3972 transitions. [2023-08-29 19:51:00,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44988107373428476 [2023-08-29 19:51:00,379 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3972 transitions. [2023-08-29 19:51:00,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3972 transitions. [2023-08-29 19:51:00,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:51:00,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3972 transitions. [2023-08-29 19:51:00,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 147.11111111111111) internal successors, (3972), 27 states have internal predecessors, (3972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:51:00,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 327.0) internal successors, (9156), 28 states have internal predecessors, (9156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:51:00,388 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 327.0) internal successors, (9156), 28 states have internal predecessors, (9156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:51:00,388 INFO L175 Difference]: Start difference. First operand has 721 places, 1843 transitions, 30875 flow. Second operand 27 states and 3972 transitions. [2023-08-29 19:51:00,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 740 places, 2481 transitions, 45380 flow [2023-08-29 19:51:08,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 694 places, 2481 transitions, 43631 flow, removed 234 selfloop flow, removed 46 redundant places. [2023-08-29 19:51:08,751 INFO L231 Difference]: Finished difference. Result has 700 places, 1921 transitions, 34431 flow [2023-08-29 19:51:08,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=28121, PETRI_DIFFERENCE_MINUEND_PLACES=668, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=853, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=797, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=34431, PETRI_PLACES=700, PETRI_TRANSITIONS=1921} [2023-08-29 19:51:08,752 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 652 predicate places. [2023-08-29 19:51:08,753 INFO L495 AbstractCegarLoop]: Abstraction has has 700 places, 1921 transitions, 34431 flow [2023-08-29 19:51:08,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 142.04545454545453) internal successors, (3125), 22 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:51:08,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:51:08,753 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:51:08,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-29 19:51:08,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-08-29 19:51:08,954 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:51:08,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:51:08,954 INFO L85 PathProgramCache]: Analyzing trace with hash -2073502669, now seen corresponding path program 5 times [2023-08-29 19:51:08,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:51:08,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310897605] [2023-08-29 19:51:08,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:51:08,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:51:08,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:51:10,954 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:51:10,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:51:10,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310897605] [2023-08-29 19:51:10,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310897605] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:51:10,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182320554] [2023-08-29 19:51:10,955 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 19:51:10,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:51:10,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:51:10,957 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:51:10,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-29 19:51:11,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-29 19:51:11,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:51:11,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 88 conjunts are in the unsatisfiable core [2023-08-29 19:51:11,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:51:11,133 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 19:51:11,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-08-29 19:51:11,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-29 19:51:11,832 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 19:51:11,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2023-08-29 19:51:12,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:51:12,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 48 [2023-08-29 19:51:14,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 43 [2023-08-29 19:51:15,087 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:51:15,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:51:18,173 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:51:18,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-29 19:51:18,188 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:51:18,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2023-08-29 19:51:18,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-08-29 19:51:19,059 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:51:19,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182320554] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:51:19,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:51:19,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 27, 27] total 77 [2023-08-29 19:51:19,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314674740] [2023-08-29 19:51:19,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:51:19,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2023-08-29 19:51:19,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:51:19,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2023-08-29 19:51:19,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=5865, Unknown=0, NotChecked=0, Total=6162 [2023-08-29 19:51:23,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:52:01,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:52:05,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:52:16,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 327 [2023-08-29 19:52:16,643 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 700 places, 1921 transitions, 34431 flow. Second operand has 79 states, 79 states have (on average 112.63291139240506) internal successors, (8898), 79 states have internal predecessors, (8898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:52:16,643 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:52:16,643 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 327 [2023-08-29 19:52:16,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:52:31,839 WARN L222 SmtUtils]: Spent 10.62s on a formula simplification. DAG size of input: 139 DAG size of output: 135 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 19:52:43,409 WARN L222 SmtUtils]: Spent 10.69s on a formula simplification. DAG size of input: 129 DAG size of output: 125 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 19:53:12,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 19:53:32,855 WARN L222 SmtUtils]: Spent 8.52s on a formula simplification. DAG size of input: 116 DAG size of output: 99 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 19:54:06,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 19:54:12,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:54:57,921 INFO L130 PetriNetUnfolder]: 39296/77445 cut-off events. [2023-08-29 19:54:57,922 INFO L131 PetriNetUnfolder]: For 816475/816475 co-relation queries the response was YES. [2023-08-29 19:55:00,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 558988 conditions, 77445 events. 39296/77445 cut-off events. For 816475/816475 co-relation queries the response was YES. Maximal size of possible extension queue 1396. Compared 726310 event pairs, 10266 based on Foata normal form. 144/76849 useless extension candidates. Maximal degree in co-relation 558833. Up to 36653 conditions per place. [2023-08-29 19:55:00,955 INFO L137 encePairwiseOnDemand]: 306/327 looper letters, 1957 selfloop transitions, 1231 changer transitions 63/3251 dead transitions. [2023-08-29 19:55:00,955 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 842 places, 3251 transitions, 58884 flow [2023-08-29 19:55:00,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2023-08-29 19:55:00,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2023-08-29 19:55:00,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 16688 transitions. [2023-08-29 19:55:00,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3568785954107055 [2023-08-29 19:55:00,966 INFO L72 ComplementDD]: Start complementDD. Operand 143 states and 16688 transitions. [2023-08-29 19:55:00,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 143 states and 16688 transitions. [2023-08-29 19:55:00,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:00,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 143 states and 16688 transitions. [2023-08-29 19:55:00,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 144 states, 143 states have (on average 116.6993006993007) internal successors, (16688), 143 states have internal predecessors, (16688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:01,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 144 states, 144 states have (on average 327.0) internal successors, (47088), 144 states have internal predecessors, (47088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:01,021 INFO L81 ComplementDD]: Finished complementDD. Result has 144 states, 144 states have (on average 327.0) internal successors, (47088), 144 states have internal predecessors, (47088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:01,021 INFO L175 Difference]: Start difference. First operand has 700 places, 1921 transitions, 34431 flow. Second operand 143 states and 16688 transitions. [2023-08-29 19:55:01,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 842 places, 3251 transitions, 58884 flow [2023-08-29 19:55:21,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 830 places, 3251 transitions, 57132 flow, removed 358 selfloop flow, removed 12 redundant places. [2023-08-29 19:55:21,212 INFO L231 Difference]: Finished difference. Result has 910 places, 2561 transitions, 48861 flow [2023-08-29 19:55:21,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=33221, PETRI_DIFFERENCE_MINUEND_PLACES=688, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1921, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=667, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=971, PETRI_DIFFERENCE_SUBTRAHEND_STATES=143, PETRI_FLOW=48861, PETRI_PLACES=910, PETRI_TRANSITIONS=2561} [2023-08-29 19:55:21,214 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 862 predicate places. [2023-08-29 19:55:21,214 INFO L495 AbstractCegarLoop]: Abstraction has has 910 places, 2561 transitions, 48861 flow [2023-08-29 19:55:21,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 112.63291139240506) internal successors, (8898), 79 states have internal predecessors, (8898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:21,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:21,216 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:55:21,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-29 19:55:21,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:55:21,417 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:55:21,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:21,417 INFO L85 PathProgramCache]: Analyzing trace with hash -86159361, now seen corresponding path program 6 times [2023-08-29 19:55:21,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:21,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561959882] [2023-08-29 19:55:21,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:21,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:21,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:23,186 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:55:23,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:23,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561959882] [2023-08-29 19:55:23,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561959882] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:55:23,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125190427] [2023-08-29 19:55:23,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-29 19:55:23,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:55:23,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:55:23,189 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:55:23,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-29 19:55:23,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-29 19:55:23,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:55:23,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 93 conjunts are in the unsatisfiable core [2023-08-29 19:55:23,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:55:23,446 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 19:55:23,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-08-29 19:55:24,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-29 19:55:24,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2023-08-29 19:55:25,096 INFO L321 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2023-08-29 19:55:25,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 48 [2023-08-29 19:55:26,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 43 [2023-08-29 19:55:26,707 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:55:26,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:55:27,959 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1312 (Array Int Int)) (|t1Thread1of1ForFork1_push_~stack#1.offset| Int) (|t1Thread1of1ForFork1_push_#t~ret34#1| Int)) (not (= 4294967294 (mod (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1312))) (store .cse0 |c_t1Thread1of1ForFork1_push_~stack#1.base| (store (select .cse0 |c_t1Thread1of1ForFork1_push_~stack#1.base|) (+ |t1Thread1of1ForFork1_push_~stack#1.offset| (* |t1Thread1of1ForFork1_push_#t~ret34#1| 4)) |c_t1Thread1of1ForFork1_push_~x#1|))) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (- 4) (* c_~top~0 4))) 4294967296)))) is different from false [2023-08-29 19:55:29,992 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1312 (Array Int Int)) (|t1Thread1of1ForFork1_push_~stack#1.offset| Int) (|t1Thread1of1ForFork1_push_#t~ret34#1| Int)) (not (= (mod (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1312))) (store .cse0 |c_t1Thread1of1ForFork1_push_#in~stack#1.base| (store (select .cse0 |c_t1Thread1of1ForFork1_push_#in~stack#1.base|) (+ |t1Thread1of1ForFork1_push_~stack#1.offset| (* |t1Thread1of1ForFork1_push_#t~ret34#1| 4)) |c_t1Thread1of1ForFork1_push_#in~x#1|))) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (- 4) (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2023-08-29 19:55:30,301 WARN L839 $PredicateComparison]: unable to prove that (forall ((|aux_mod_v_t1Thread1of1ForFork1_~tmp~0#1_87_53| Int) (v_ArrVal_1312 (Array Int Int)) (|t1Thread1of1ForFork1_push_~stack#1.offset| Int) (|t1Thread1of1ForFork1_push_#t~ret34#1| Int)) (or (< |aux_mod_v_t1Thread1of1ForFork1_~tmp~0#1_87_53| 0) (not (= 4294967294 (mod (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1312) |c_~#arr~0.base|) (+ |t1Thread1of1ForFork1_push_~stack#1.offset| (* |t1Thread1of1ForFork1_push_#t~ret34#1| 4)) (mod |aux_mod_v_t1Thread1of1ForFork1_~tmp~0#1_87_53| 4294967296)) (+ (* |c_t1Thread1of1ForFork1_inc_top_#t~post31#1| 4) |c_~#arr~0.offset|)) 4294967296))) (<= 400 |aux_mod_v_t1Thread1of1ForFork1_~tmp~0#1_87_53|))) is different from false [2023-08-29 19:55:30,576 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:55:30,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 39 [2023-08-29 19:55:30,593 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:55:30,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 71 [2023-08-29 19:55:30,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 69 [2023-08-29 19:55:30,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2023-08-29 19:55:30,646 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:55:30,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 111 Killed by 15