./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_05-lockfuns_racefree.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/goblint-regression/28-race_reach_05-lockfuns_racefree.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 1fe12ce8951e45860142b9cebaa325eef531c18fa917882c03ee5396afb187f5 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 21:36:12,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 21:36:12,863 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 21:36:12,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 21:36:12,887 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 21:36:12,888 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 21:36:12,889 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 21:36:12,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 21:36:12,893 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 21:36:12,893 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 21:36:12,894 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 21:36:12,895 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 21:36:12,896 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 21:36:12,897 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 21:36:12,898 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 21:36:12,899 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 21:36:12,899 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 21:36:12,900 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 21:36:12,902 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 21:36:12,903 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 21:36:12,916 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 21:36:12,917 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 21:36:12,918 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 21:36:12,919 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 21:36:12,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 21:36:12,922 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 21:36:12,923 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 21:36:12,923 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 21:36:12,924 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 21:36:12,925 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 21:36:12,926 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 21:36:12,926 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 21:36:12,927 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 21:36:12,928 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 21:36:12,929 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 21:36:12,929 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 21:36:12,930 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 21:36:12,930 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 21:36:12,930 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 21:36:12,931 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 21:36:12,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 21:36:12,933 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 21:36:12,953 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 21:36:12,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 21:36:12,954 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 21:36:12,954 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 21:36:12,955 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 21:36:12,955 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 21:36:12,955 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 21:36:12,956 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 21:36:12,956 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 21:36:12,956 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 21:36:12,956 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 21:36:12,956 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 21:36:12,957 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 21:36:12,957 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 21:36:12,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 21:36:12,957 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 21:36:12,957 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 21:36:12,957 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 21:36:12,958 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 21:36:12,958 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 21:36:12,958 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 21:36:12,958 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 21:36:12,958 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 21:36:12,959 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 21:36:12,959 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 21:36:12,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:36:12,959 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 21:36:12,959 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 21:36:12,960 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 21:36:12,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 21:36:12,960 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 21:36:12,960 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 21:36:12,960 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 21:36:12,961 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 21:36:12,961 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fe12ce8951e45860142b9cebaa325eef531c18fa917882c03ee5396afb187f5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 21:36:13,264 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 21:36:13,284 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 21:36:13,288 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 21:36:13,289 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 21:36:13,290 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 21:36:13,291 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_05-lockfuns_racefree.i [2023-08-29 21:36:14,527 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 21:36:14,788 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 21:36:14,788 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_05-lockfuns_racefree.i [2023-08-29 21:36:14,807 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24208405a/fb66bcd63a514af9ab60a323723ccab8/FLAGd6173b0aa [2023-08-29 21:36:14,828 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24208405a/fb66bcd63a514af9ab60a323723ccab8 [2023-08-29 21:36:14,829 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 21:36:14,831 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 21:36:14,832 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 21:36:14,832 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 21:36:14,834 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 21:36:14,835 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:36:14" (1/1) ... [2023-08-29 21:36:14,836 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@250c4eff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:36:14, skipping insertion in model container [2023-08-29 21:36:14,836 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:36:14" (1/1) ... [2023-08-29 21:36:14,841 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 21:36:14,876 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 21:36:15,157 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_05-lockfuns_racefree.i[30176,30189] [2023-08-29 21:36:15,181 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:36:15,197 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 21:36:15,236 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_05-lockfuns_racefree.i[30176,30189] [2023-08-29 21:36:15,261 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:36:15,310 INFO L208 MainTranslator]: Completed translation [2023-08-29 21:36:15,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:36:15 WrapperNode [2023-08-29 21:36:15,310 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 21:36:15,311 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 21:36:15,311 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 21:36:15,311 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 21:36:15,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:36:15" (1/1) ... [2023-08-29 21:36:15,330 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:36:15" (1/1) ... [2023-08-29 21:36:15,350 INFO L138 Inliner]: procedures = 172, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 106 [2023-08-29 21:36:15,350 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 21:36:15,351 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 21:36:15,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 21:36:15,351 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 21:36:15,358 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:36:15" (1/1) ... [2023-08-29 21:36:15,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:36:15" (1/1) ... [2023-08-29 21:36:15,361 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:36:15" (1/1) ... [2023-08-29 21:36:15,362 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:36:15" (1/1) ... [2023-08-29 21:36:15,367 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:36:15" (1/1) ... [2023-08-29 21:36:15,371 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:36:15" (1/1) ... [2023-08-29 21:36:15,378 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:36:15" (1/1) ... [2023-08-29 21:36:15,389 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:36:15" (1/1) ... [2023-08-29 21:36:15,391 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 21:36:15,392 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 21:36:15,393 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 21:36:15,393 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 21:36:15,393 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:36:15" (1/1) ... [2023-08-29 21:36:15,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:36:15,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:36:15,437 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 21:36:15,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 21:36:15,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 21:36:15,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 21:36:15,482 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 21:36:15,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 21:36:15,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 21:36:15,482 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-29 21:36:15,483 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-29 21:36:15,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 21:36:15,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 21:36:15,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 21:36:15,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 21:36:15,485 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 21:36:15,621 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 21:36:15,623 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 21:36:15,870 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 21:36:15,876 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 21:36:15,877 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-29 21:36:15,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:36:15 BoogieIcfgContainer [2023-08-29 21:36:15,879 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 21:36:15,881 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 21:36:15,881 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 21:36:15,884 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 21:36:15,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 09:36:14" (1/3) ... [2023-08-29 21:36:15,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16edff25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:36:15, skipping insertion in model container [2023-08-29 21:36:15,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:36:15" (2/3) ... [2023-08-29 21:36:15,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16edff25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:36:15, skipping insertion in model container [2023-08-29 21:36:15,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:36:15" (3/3) ... [2023-08-29 21:36:15,887 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_05-lockfuns_racefree.i [2023-08-29 21:36:15,902 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 21:36:15,902 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-29 21:36:15,902 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 21:36:15,976 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-29 21:36:16,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 111 transitions, 230 flow [2023-08-29 21:36:16,106 INFO L130 PetriNetUnfolder]: 17/153 cut-off events. [2023-08-29 21:36:16,107 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:36:16,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 153 events. 17/153 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 390 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 77. Up to 4 conditions per place. [2023-08-29 21:36:16,112 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 111 transitions, 230 flow [2023-08-29 21:36:16,117 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 111 transitions, 230 flow [2023-08-29 21:36:16,121 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:36:16,141 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 111 transitions, 230 flow [2023-08-29 21:36:16,146 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 111 transitions, 230 flow [2023-08-29 21:36:16,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 111 transitions, 230 flow [2023-08-29 21:36:16,191 INFO L130 PetriNetUnfolder]: 17/153 cut-off events. [2023-08-29 21:36:16,191 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:36:16,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 153 events. 17/153 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 390 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 77. Up to 4 conditions per place. [2023-08-29 21:36:16,195 INFO L119 LiptonReduction]: Number of co-enabled transitions 2880 [2023-08-29 21:36:18,983 INFO L134 LiptonReduction]: Checked pairs total: 4758 [2023-08-29 21:36:18,985 INFO L136 LiptonReduction]: Total number of compositions: 96 [2023-08-29 21:36:18,997 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:36:19,003 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;@7dfb45c3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:36:19,003 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 21:36:19,005 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-29 21:36:19,006 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:36:19,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:19,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:36:19,007 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:19,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:19,012 INFO L85 PathProgramCache]: Analyzing trace with hash 13933, now seen corresponding path program 1 times [2023-08-29 21:36:19,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:19,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194806462] [2023-08-29 21:36:19,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:19,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:19,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:19,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:19,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194806462] [2023-08-29 21:36:19,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194806462] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:36:19,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:36:19,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:36:19,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674384667] [2023-08-29 21:36:19,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:36:19,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:36:19,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:19,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:36:19,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:36:19,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 207 [2023-08-29 21:36:19,387 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 39 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:19,387 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:19,387 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 207 [2023-08-29 21:36:19,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:19,477 INFO L130 PetriNetUnfolder]: 112/276 cut-off events. [2023-08-29 21:36:19,477 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:36:19,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 548 conditions, 276 events. 112/276 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1238 event pairs, 0 based on Foata normal form. 24/223 useless extension candidates. Maximal degree in co-relation 502. Up to 246 conditions per place. [2023-08-29 21:36:19,480 INFO L137 encePairwiseOnDemand]: 194/207 looper letters, 32 selfloop transitions, 2 changer transitions 3/39 dead transitions. [2023-08-29 21:36:19,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 39 transitions, 158 flow [2023-08-29 21:36:19,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:36:19,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:36:19,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 329 transitions. [2023-08-29 21:36:19,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297906602254429 [2023-08-29 21:36:19,493 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 329 transitions. [2023-08-29 21:36:19,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 329 transitions. [2023-08-29 21:36:19,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:19,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 329 transitions. [2023-08-29 21:36:19,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:19,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:19,504 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:19,506 INFO L175 Difference]: Start difference. First operand has 32 places, 39 transitions, 86 flow. Second operand 3 states and 329 transitions. [2023-08-29 21:36:19,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 39 transitions, 158 flow [2023-08-29 21:36:19,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 39 transitions, 158 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:36:19,510 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 70 flow [2023-08-29 21:36:19,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2023-08-29 21:36:19,514 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2023-08-29 21:36:19,514 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 70 flow [2023-08-29 21:36:19,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:19,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:19,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:36:19,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 21:36:19,515 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:19,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:19,516 INFO L85 PathProgramCache]: Analyzing trace with hash 13931, now seen corresponding path program 1 times [2023-08-29 21:36:19,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:19,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195082909] [2023-08-29 21:36:19,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:19,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:19,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:19,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:19,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:19,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195082909] [2023-08-29 21:36:19,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195082909] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:36:19,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:36:19,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:36:19,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291800542] [2023-08-29 21:36:19,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:36:19,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:36:19,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:19,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:36:19,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:36:19,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 207 [2023-08-29 21:36:19,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:19,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:19,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 207 [2023-08-29 21:36:19,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:19,649 INFO L130 PetriNetUnfolder]: 88/209 cut-off events. [2023-08-29 21:36:19,649 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-08-29 21:36:19,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 457 conditions, 209 events. 88/209 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 766 event pairs, 80 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 432. Up to 185 conditions per place. [2023-08-29 21:36:19,654 INFO L137 encePairwiseOnDemand]: 203/207 looper letters, 29 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2023-08-29 21:36:19,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 33 transitions, 144 flow [2023-08-29 21:36:19,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:36:19,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:36:19,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 300 transitions. [2023-08-29 21:36:19,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4830917874396135 [2023-08-29 21:36:19,660 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 300 transitions. [2023-08-29 21:36:19,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 300 transitions. [2023-08-29 21:36:19,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:19,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 300 transitions. [2023-08-29 21:36:19,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:19,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:19,665 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:19,666 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 70 flow. Second operand 3 states and 300 transitions. [2023-08-29 21:36:19,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 33 transitions, 144 flow [2023-08-29 21:36:19,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 33 transitions, 138 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:36:19,668 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 64 flow [2023-08-29 21:36:19,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2023-08-29 21:36:19,669 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -3 predicate places. [2023-08-29 21:36:19,669 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 64 flow [2023-08-29 21:36:19,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:19,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:19,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 21:36:19,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 21:36:19,670 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:19,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:19,672 INFO L85 PathProgramCache]: Analyzing trace with hash 415357916, now seen corresponding path program 1 times [2023-08-29 21:36:19,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:19,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463771434] [2023-08-29 21:36:19,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:19,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:19,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:19,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:19,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:19,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463771434] [2023-08-29 21:36:19,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463771434] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:36:19,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069004453] [2023-08-29 21:36:19,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:19,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:36:19,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:36:19,797 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:36:19,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-29 21:36:19,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:19,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:36:19,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:36:19,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:36:20,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:20,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:36:20,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:20,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069004453] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:36:20,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:36:20,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-29 21:36:20,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327621956] [2023-08-29 21:36:20,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:36:20,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:36:20,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:20,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:36:20,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:36:20,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 207 [2023-08-29 21:36:20,163 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 64 flow. Second operand has 7 states, 7 states have (on average 90.71428571428571) internal successors, (635), 7 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:20,163 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:20,164 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 207 [2023-08-29 21:36:20,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:20,203 INFO L130 PetriNetUnfolder]: 16/46 cut-off events. [2023-08-29 21:36:20,203 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 21:36:20,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 46 events. 16/46 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 7 based on Foata normal form. 9/55 useless extension candidates. Maximal degree in co-relation 99. Up to 34 conditions per place. [2023-08-29 21:36:20,204 INFO L137 encePairwiseOnDemand]: 203/207 looper letters, 0 selfloop transitions, 0 changer transitions 22/22 dead transitions. [2023-08-29 21:36:20,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 22 transitions, 92 flow [2023-08-29 21:36:20,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:36:20,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:36:20,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 379 transitions. [2023-08-29 21:36:20,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577294685990338 [2023-08-29 21:36:20,206 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 379 transitions. [2023-08-29 21:36:20,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 379 transitions. [2023-08-29 21:36:20,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:20,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 379 transitions. [2023-08-29 21:36:20,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.75) internal successors, (379), 4 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:20,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 207.0) internal successors, (1035), 5 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:20,209 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 207.0) internal successors, (1035), 5 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:20,209 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 64 flow. Second operand 4 states and 379 transitions. [2023-08-29 21:36:20,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 22 transitions, 92 flow [2023-08-29 21:36:20,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 22 transitions, 89 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:36:20,210 INFO L231 Difference]: Finished difference. Result has 19 places, 0 transitions, 0 flow [2023-08-29 21:36:20,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=29, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=19, PETRI_TRANSITIONS=0} [2023-08-29 21:36:20,211 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -13 predicate places. [2023-08-29 21:36:20,212 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 0 transitions, 0 flow [2023-08-29 21:36:20,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.71428571428571) internal successors, (635), 7 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:20,215 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (5 of 6 remaining) [2023-08-29 21:36:20,215 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2023-08-29 21:36:20,215 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 6 remaining) [2023-08-29 21:36:20,216 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-08-29 21:36:20,216 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 6 remaining) [2023-08-29 21:36:20,216 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 6 remaining) [2023-08-29 21:36:20,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-29 21:36:20,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:36:20,428 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-29 21:36:20,430 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:36:20,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 111 transitions, 230 flow [2023-08-29 21:36:20,446 INFO L130 PetriNetUnfolder]: 17/153 cut-off events. [2023-08-29 21:36:20,447 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:36:20,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 153 events. 17/153 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 390 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 77. Up to 4 conditions per place. [2023-08-29 21:36:20,447 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 111 transitions, 230 flow [2023-08-29 21:36:20,448 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 106 transitions, 217 flow [2023-08-29 21:36:20,448 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:36:20,448 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 98 places, 106 transitions, 217 flow [2023-08-29 21:36:20,449 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 98 places, 106 transitions, 217 flow [2023-08-29 21:36:20,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 106 transitions, 217 flow [2023-08-29 21:36:20,460 INFO L130 PetriNetUnfolder]: 16/148 cut-off events. [2023-08-29 21:36:20,460 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:36:20,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 148 events. 16/148 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 375 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 77. Up to 4 conditions per place. [2023-08-29 21:36:20,462 INFO L119 LiptonReduction]: Number of co-enabled transitions 2880 [2023-08-29 21:36:22,752 INFO L134 LiptonReduction]: Checked pairs total: 4629 [2023-08-29 21:36:22,753 INFO L136 LiptonReduction]: Total number of compositions: 90 [2023-08-29 21:36:22,754 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:36:22,755 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;@7dfb45c3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:36:22,756 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:36:22,759 INFO L130 PetriNetUnfolder]: 3/30 cut-off events. [2023-08-29 21:36:22,759 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:36:22,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:22,759 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-29 21:36:22,760 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:36:22,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:22,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1643944712, now seen corresponding path program 1 times [2023-08-29 21:36:22,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:22,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062775098] [2023-08-29 21:36:22,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:22,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:22,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:36:22,775 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:36:22,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:36:22,795 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:36:22,796 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:36:22,796 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:36:22,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 21:36:22,796 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:36:22,797 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:36:22,798 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:36:22,798 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-29 21:36:22,820 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 21:36:22,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 143 transitions, 304 flow [2023-08-29 21:36:22,843 INFO L130 PetriNetUnfolder]: 31/256 cut-off events. [2023-08-29 21:36:22,843 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:36:22,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 256 events. 31/256 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 797 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 155. Up to 8 conditions per place. [2023-08-29 21:36:22,845 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 143 transitions, 304 flow [2023-08-29 21:36:22,847 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 143 transitions, 304 flow [2023-08-29 21:36:22,847 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:36:22,847 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 143 transitions, 304 flow [2023-08-29 21:36:22,847 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 143 transitions, 304 flow [2023-08-29 21:36:22,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 143 transitions, 304 flow [2023-08-29 21:36:22,867 INFO L130 PetriNetUnfolder]: 31/256 cut-off events. [2023-08-29 21:36:22,868 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:36:22,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 256 events. 31/256 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 797 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 155. Up to 8 conditions per place. [2023-08-29 21:36:22,875 INFO L119 LiptonReduction]: Number of co-enabled transitions 8220 [2023-08-29 21:36:25,171 INFO L134 LiptonReduction]: Checked pairs total: 17045 [2023-08-29 21:36:25,172 INFO L136 LiptonReduction]: Total number of compositions: 107 [2023-08-29 21:36:25,173 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:36:25,174 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;@7dfb45c3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:36:25,174 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 21:36:25,175 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 21:36:25,176 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:36:25,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:25,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:36:25,176 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:25,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:25,177 INFO L85 PathProgramCache]: Analyzing trace with hash 25830, now seen corresponding path program 1 times [2023-08-29 21:36:25,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:25,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96815680] [2023-08-29 21:36:25,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:25,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:25,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:25,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:25,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:25,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96815680] [2023-08-29 21:36:25,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96815680] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:36:25,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:36:25,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:36:25,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823724247] [2023-08-29 21:36:25,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:36:25,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:36:25,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:25,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:36:25,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:36:25,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 250 [2023-08-29 21:36:25,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 62 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:25,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:25,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 250 [2023-08-29 21:36:25,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:25,629 INFO L130 PetriNetUnfolder]: 2274/4044 cut-off events. [2023-08-29 21:36:25,629 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:36:25,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7821 conditions, 4044 events. 2274/4044 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 25817 event pairs, 1064 based on Foata normal form. 383/3648 useless extension candidates. Maximal degree in co-relation 804. Up to 3695 conditions per place. [2023-08-29 21:36:25,649 INFO L137 encePairwiseOnDemand]: 231/250 looper letters, 44 selfloop transitions, 2 changer transitions 2/57 dead transitions. [2023-08-29 21:36:25,650 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 57 transitions, 226 flow [2023-08-29 21:36:25,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:36:25,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:36:25,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 418 transitions. [2023-08-29 21:36:25,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5573333333333333 [2023-08-29 21:36:25,652 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 418 transitions. [2023-08-29 21:36:25,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 418 transitions. [2023-08-29 21:36:25,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:25,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 418 transitions. [2023-08-29 21:36:25,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:25,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:25,659 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:25,659 INFO L175 Difference]: Start difference. First operand has 50 places, 62 transitions, 142 flow. Second operand 3 states and 418 transitions. [2023-08-29 21:36:25,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 57 transitions, 226 flow [2023-08-29 21:36:25,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 226 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:36:25,663 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 116 flow [2023-08-29 21:36:25,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2023-08-29 21:36:25,667 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2023-08-29 21:36:25,667 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 116 flow [2023-08-29 21:36:25,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:25,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:25,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:36:25,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 21:36:25,668 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:25,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:25,670 INFO L85 PathProgramCache]: Analyzing trace with hash 25831, now seen corresponding path program 1 times [2023-08-29 21:36:25,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:25,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744928002] [2023-08-29 21:36:25,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:25,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:25,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:25,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:25,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744928002] [2023-08-29 21:36:25,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744928002] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:36:25,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:36:25,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:36:25,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180358335] [2023-08-29 21:36:25,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:36:25,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:36:25,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:25,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:36:25,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:36:25,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 250 [2023-08-29 21:36:25,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:25,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:25,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 250 [2023-08-29 21:36:25,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:26,056 INFO L130 PetriNetUnfolder]: 1802/3170 cut-off events. [2023-08-29 21:36:26,056 INFO L131 PetriNetUnfolder]: For 224/224 co-relation queries the response was YES. [2023-08-29 21:36:26,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6448 conditions, 3170 events. 1802/3170 cut-off events. For 224/224 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 19060 event pairs, 1632 based on Foata normal form. 0/2755 useless extension candidates. Maximal degree in co-relation 6377. Up to 2683 conditions per place. [2023-08-29 21:36:26,070 INFO L137 encePairwiseOnDemand]: 246/250 looper letters, 48 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-29 21:36:26,071 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 59 transitions, 244 flow [2023-08-29 21:36:26,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:36:26,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:36:26,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 390 transitions. [2023-08-29 21:36:26,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2023-08-29 21:36:26,073 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 390 transitions. [2023-08-29 21:36:26,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 390 transitions. [2023-08-29 21:36:26,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:26,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 390 transitions. [2023-08-29 21:36:26,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:26,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:26,077 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:26,077 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 116 flow. Second operand 3 states and 390 transitions. [2023-08-29 21:36:26,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 59 transitions, 244 flow [2023-08-29 21:36:26,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 59 transitions, 240 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:36:26,080 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 112 flow [2023-08-29 21:36:26,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2023-08-29 21:36:26,081 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -2 predicate places. [2023-08-29 21:36:26,081 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 112 flow [2023-08-29 21:36:26,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:26,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:26,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:36:26,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 21:36:26,082 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:26,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:26,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1895768654, now seen corresponding path program 1 times [2023-08-29 21:36:26,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:26,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819228825] [2023-08-29 21:36:26,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:26,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:26,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:26,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:26,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:26,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819228825] [2023-08-29 21:36:26,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819228825] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:36:26,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650328327] [2023-08-29 21:36:26,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:26,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:36:26,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:36:26,154 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:36:26,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-29 21:36:26,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:26,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:36:26,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:36:26,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:36:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:26,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:36:26,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:26,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650328327] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:36:26,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:36:26,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-29 21:36:26,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656532728] [2023-08-29 21:36:26,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:36:26,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:36:26,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:26,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:36:26,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:36:26,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 250 [2023-08-29 21:36:26,424 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 112 flow. Second operand has 7 states, 7 states have (on average 114.71428571428571) internal successors, (803), 7 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:26,424 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:26,424 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 250 [2023-08-29 21:36:26,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:26,833 INFO L130 PetriNetUnfolder]: 1609/2764 cut-off events. [2023-08-29 21:36:26,833 INFO L131 PetriNetUnfolder]: For 109/109 co-relation queries the response was YES. [2023-08-29 21:36:26,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5707 conditions, 2764 events. 1609/2764 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 16284 event pairs, 1 based on Foata normal form. 9/2592 useless extension candidates. Maximal degree in co-relation 5077. Up to 2166 conditions per place. [2023-08-29 21:36:26,847 INFO L137 encePairwiseOnDemand]: 245/250 looper letters, 70 selfloop transitions, 4 changer transitions 1/84 dead transitions. [2023-08-29 21:36:26,847 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 84 transitions, 342 flow [2023-08-29 21:36:26,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:36:26,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:36:26,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 643 transitions. [2023-08-29 21:36:26,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5144 [2023-08-29 21:36:26,850 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 643 transitions. [2023-08-29 21:36:26,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 643 transitions. [2023-08-29 21:36:26,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:26,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 643 transitions. [2023-08-29 21:36:26,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 128.6) internal successors, (643), 5 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:26,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 250.0) internal successors, (1500), 6 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:26,856 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 250.0) internal successors, (1500), 6 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:26,856 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 112 flow. Second operand 5 states and 643 transitions. [2023-08-29 21:36:26,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 84 transitions, 342 flow [2023-08-29 21:36:26,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 84 transitions, 338 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:36:26,864 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 116 flow [2023-08-29 21:36:26,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=116, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2023-08-29 21:36:26,866 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2023-08-29 21:36:26,866 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 116 flow [2023-08-29 21:36:26,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 114.71428571428571) internal successors, (803), 7 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:26,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:26,867 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-29 21:36:26,878 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 21:36:27,075 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,SelfDestructingSolverStorable6 [2023-08-29 21:36:27,075 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:27,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:27,076 INFO L85 PathProgramCache]: Analyzing trace with hash 909328916, now seen corresponding path program 1 times [2023-08-29 21:36:27,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:27,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651159790] [2023-08-29 21:36:27,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:27,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:27,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:27,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 21:36:27,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:27,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651159790] [2023-08-29 21:36:27,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651159790] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:36:27,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:36:27,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:36:27,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715974499] [2023-08-29 21:36:27,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:36:27,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:36:27,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:27,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:36:27,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:36:27,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 250 [2023-08-29 21:36:27,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:27,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:27,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 250 [2023-08-29 21:36:27,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:27,440 INFO L130 PetriNetUnfolder]: 1591/2782 cut-off events. [2023-08-29 21:36:27,440 INFO L131 PetriNetUnfolder]: For 650/650 co-relation queries the response was YES. [2023-08-29 21:36:27,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5951 conditions, 2782 events. 1591/2782 cut-off events. For 650/650 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 15966 event pairs, 570 based on Foata normal form. 0/2606 useless extension candidates. Maximal degree in co-relation 4308. Up to 2379 conditions per place. [2023-08-29 21:36:27,458 INFO L137 encePairwiseOnDemand]: 246/250 looper letters, 47 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2023-08-29 21:36:27,459 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 59 transitions, 270 flow [2023-08-29 21:36:27,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:36:27,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:36:27,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 397 transitions. [2023-08-29 21:36:27,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5293333333333333 [2023-08-29 21:36:27,462 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 397 transitions. [2023-08-29 21:36:27,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 397 transitions. [2023-08-29 21:36:27,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:27,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 397 transitions. [2023-08-29 21:36:27,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:27,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:27,465 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:27,465 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 116 flow. Second operand 3 states and 397 transitions. [2023-08-29 21:36:27,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 59 transitions, 270 flow [2023-08-29 21:36:27,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 59 transitions, 256 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-29 21:36:27,469 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 127 flow [2023-08-29 21:36:27,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2023-08-29 21:36:27,470 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2023-08-29 21:36:27,470 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 127 flow [2023-08-29 21:36:27,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:27,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:27,471 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:36:27,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 21:36:27,471 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:27,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:27,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1459176103, now seen corresponding path program 1 times [2023-08-29 21:36:27,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:27,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285698538] [2023-08-29 21:36:27,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:27,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:27,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:27,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 21:36:27,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:27,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285698538] [2023-08-29 21:36:27,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285698538] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:36:27,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:36:27,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:36:27,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292816486] [2023-08-29 21:36:27,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:36:27,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:36:27,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:27,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:36:27,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:36:27,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 250 [2023-08-29 21:36:27,529 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:27,529 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:27,529 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 250 [2023-08-29 21:36:27,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:27,800 INFO L130 PetriNetUnfolder]: 1447/2529 cut-off events. [2023-08-29 21:36:27,800 INFO L131 PetriNetUnfolder]: For 627/627 co-relation queries the response was YES. [2023-08-29 21:36:27,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5528 conditions, 2529 events. 1447/2529 cut-off events. For 627/627 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 14451 event pairs, 952 based on Foata normal form. 0/2387 useless extension candidates. Maximal degree in co-relation 3547. Up to 1664 conditions per place. [2023-08-29 21:36:27,814 INFO L137 encePairwiseOnDemand]: 247/250 looper letters, 56 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-08-29 21:36:27,814 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 67 transitions, 304 flow [2023-08-29 21:36:27,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:36:27,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:36:27,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 405 transitions. [2023-08-29 21:36:27,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2023-08-29 21:36:27,816 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 405 transitions. [2023-08-29 21:36:27,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 405 transitions. [2023-08-29 21:36:27,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:27,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 405 transitions. [2023-08-29 21:36:27,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:27,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:27,820 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:27,820 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 127 flow. Second operand 3 states and 405 transitions. [2023-08-29 21:36:27,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 67 transitions, 304 flow [2023-08-29 21:36:27,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 67 transitions, 299 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:36:27,822 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 136 flow [2023-08-29 21:36:27,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2023-08-29 21:36:27,823 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2023-08-29 21:36:27,823 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 136 flow [2023-08-29 21:36:27,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:27,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:27,824 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:36:27,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 21:36:27,824 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:27,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:27,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1459176051, now seen corresponding path program 1 times [2023-08-29 21:36:27,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:27,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443600276] [2023-08-29 21:36:27,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:27,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:27,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:27,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 21:36:27,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:27,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443600276] [2023-08-29 21:36:27,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443600276] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:36:27,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:36:27,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:36:27,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220461987] [2023-08-29 21:36:27,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:36:27,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:36:27,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:27,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:36:27,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:36:27,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 250 [2023-08-29 21:36:27,932 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 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 21:36:27,932 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:27,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 250 [2023-08-29 21:36:27,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:28,175 INFO L130 PetriNetUnfolder]: 1303/2304 cut-off events. [2023-08-29 21:36:28,175 INFO L131 PetriNetUnfolder]: For 817/817 co-relation queries the response was YES. [2023-08-29 21:36:28,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5141 conditions, 2304 events. 1303/2304 cut-off events. For 817/817 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 12982 event pairs, 937 based on Foata normal form. 0/2262 useless extension candidates. Maximal degree in co-relation 3658. Up to 1628 conditions per place. [2023-08-29 21:36:28,187 INFO L137 encePairwiseOnDemand]: 245/250 looper letters, 69 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2023-08-29 21:36:28,187 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 82 transitions, 373 flow [2023-08-29 21:36:28,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:36:28,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:36:28,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 525 transitions. [2023-08-29 21:36:28,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2023-08-29 21:36:28,190 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 525 transitions. [2023-08-29 21:36:28,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 525 transitions. [2023-08-29 21:36:28,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:28,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 525 transitions. [2023-08-29 21:36:28,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 131.25) internal successors, (525), 4 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:28,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:28,193 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:28,194 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 136 flow. Second operand 4 states and 525 transitions. [2023-08-29 21:36:28,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 82 transitions, 373 flow [2023-08-29 21:36:28,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 82 transitions, 371 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:36:28,198 INFO L231 Difference]: Finished difference. Result has 55 places, 45 transitions, 146 flow [2023-08-29 21:36:28,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=55, PETRI_TRANSITIONS=45} [2023-08-29 21:36:28,199 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 5 predicate places. [2023-08-29 21:36:28,199 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 45 transitions, 146 flow [2023-08-29 21:36:28,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 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 21:36:28,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:28,200 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:36:28,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 21:36:28,200 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:28,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:28,201 INFO L85 PathProgramCache]: Analyzing trace with hash -882098111, now seen corresponding path program 1 times [2023-08-29 21:36:28,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:28,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440146970] [2023-08-29 21:36:28,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:28,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:28,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:28,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:28,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:28,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440146970] [2023-08-29 21:36:28,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440146970] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:36:28,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463094577] [2023-08-29 21:36:28,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:28,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:36:28,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:36:28,247 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:36:28,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-29 21:36:28,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:28,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 21:36:28,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:36:28,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:28,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:36:28,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:28,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463094577] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:36:28,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:36:28,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-08-29 21:36:28,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873883943] [2023-08-29 21:36:28,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:36:28,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 21:36:28,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:28,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 21:36:28,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-08-29 21:36:28,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 250 [2023-08-29 21:36:28,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 45 transitions, 146 flow. Second operand has 9 states, 9 states have (on average 119.0) internal successors, (1071), 9 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:28,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:28,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 250 [2023-08-29 21:36:28,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:28,512 INFO L130 PetriNetUnfolder]: 376/688 cut-off events. [2023-08-29 21:36:28,512 INFO L131 PetriNetUnfolder]: For 173/173 co-relation queries the response was YES. [2023-08-29 21:36:28,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1525 conditions, 688 events. 376/688 cut-off events. For 173/173 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 3182 event pairs, 0 based on Foata normal form. 81/769 useless extension candidates. Maximal degree in co-relation 1515. Up to 450 conditions per place. [2023-08-29 21:36:28,515 INFO L137 encePairwiseOnDemand]: 247/250 looper letters, 0 selfloop transitions, 0 changer transitions 59/59 dead transitions. [2023-08-29 21:36:28,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 259 flow [2023-08-29 21:36:28,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:36:28,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:36:28,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 629 transitions. [2023-08-29 21:36:28,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5032 [2023-08-29 21:36:28,522 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 629 transitions. [2023-08-29 21:36:28,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 629 transitions. [2023-08-29 21:36:28,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:28,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 629 transitions. [2023-08-29 21:36:28,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 125.8) internal successors, (629), 5 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:28,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 250.0) internal successors, (1500), 6 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:28,526 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 250.0) internal successors, (1500), 6 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:28,526 INFO L175 Difference]: Start difference. First operand has 55 places, 45 transitions, 146 flow. Second operand 5 states and 629 transitions. [2023-08-29 21:36:28,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 259 flow [2023-08-29 21:36:28,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 59 transitions, 254 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:36:28,528 INFO L231 Difference]: Finished difference. Result has 43 places, 0 transitions, 0 flow [2023-08-29 21:36:28,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=43, PETRI_TRANSITIONS=0} [2023-08-29 21:36:28,529 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -7 predicate places. [2023-08-29 21:36:28,529 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 0 transitions, 0 flow [2023-08-29 21:36:28,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 119.0) internal successors, (1071), 9 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:28,530 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (5 of 6 remaining) [2023-08-29 21:36:28,530 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2023-08-29 21:36:28,530 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 6 remaining) [2023-08-29 21:36:28,530 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-08-29 21:36:28,530 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 6 remaining) [2023-08-29 21:36:28,530 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 6 remaining) [2023-08-29 21:36:28,539 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 21:36:28,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:36:28,737 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:36:28,737 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:36:28,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 143 transitions, 304 flow [2023-08-29 21:36:28,758 INFO L130 PetriNetUnfolder]: 31/256 cut-off events. [2023-08-29 21:36:28,759 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:36:28,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 256 events. 31/256 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 797 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 155. Up to 8 conditions per place. [2023-08-29 21:36:28,760 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 143 transitions, 304 flow [2023-08-29 21:36:28,761 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 143 transitions, 304 flow [2023-08-29 21:36:28,762 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:36:28,762 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 143 transitions, 304 flow [2023-08-29 21:36:28,762 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 143 transitions, 304 flow [2023-08-29 21:36:28,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 143 transitions, 304 flow [2023-08-29 21:36:28,780 INFO L130 PetriNetUnfolder]: 31/256 cut-off events. [2023-08-29 21:36:28,780 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:36:28,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 256 events. 31/256 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 797 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 155. Up to 8 conditions per place. [2023-08-29 21:36:28,787 INFO L119 LiptonReduction]: Number of co-enabled transitions 8220 [2023-08-29 21:36:31,000 INFO L134 LiptonReduction]: Checked pairs total: 18966 [2023-08-29 21:36:31,000 INFO L136 LiptonReduction]: Total number of compositions: 108 [2023-08-29 21:36:31,001 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:36:31,002 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;@7dfb45c3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:36:31,002 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:36:31,007 INFO L130 PetriNetUnfolder]: 10/66 cut-off events. [2023-08-29 21:36:31,007 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 21:36:31,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:31,008 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-29 21:36:31,008 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:36:31,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:31,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1480503131, now seen corresponding path program 1 times [2023-08-29 21:36:31,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:31,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715437954] [2023-08-29 21:36:31,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:31,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:36:31,032 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:36:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:36:31,051 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:36:31,052 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:36:31,052 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:36:31,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 21:36:31,052 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:36:31,053 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:36:31,053 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:36:31,053 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-29 21:36:31,081 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-29 21:36:31,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 175 transitions, 380 flow [2023-08-29 21:36:31,115 INFO L130 PetriNetUnfolder]: 50/400 cut-off events. [2023-08-29 21:36:31,116 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:36:31,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 428 conditions, 400 events. 50/400 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1445 event pairs, 1 based on Foata normal form. 0/310 useless extension candidates. Maximal degree in co-relation 264. Up to 16 conditions per place. [2023-08-29 21:36:31,119 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 175 transitions, 380 flow [2023-08-29 21:36:31,124 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 156 places, 175 transitions, 380 flow [2023-08-29 21:36:31,124 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:36:31,124 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 156 places, 175 transitions, 380 flow [2023-08-29 21:36:31,125 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 156 places, 175 transitions, 380 flow [2023-08-29 21:36:31,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 175 transitions, 380 flow [2023-08-29 21:36:31,177 INFO L130 PetriNetUnfolder]: 50/400 cut-off events. [2023-08-29 21:36:31,177 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:36:31,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 428 conditions, 400 events. 50/400 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1445 event pairs, 1 based on Foata normal form. 0/310 useless extension candidates. Maximal degree in co-relation 264. Up to 16 conditions per place. [2023-08-29 21:36:31,195 INFO L119 LiptonReduction]: Number of co-enabled transitions 15300 [2023-08-29 21:36:33,560 INFO L134 LiptonReduction]: Checked pairs total: 35960 [2023-08-29 21:36:33,560 INFO L136 LiptonReduction]: Total number of compositions: 126 [2023-08-29 21:36:33,562 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:36:33,562 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;@7dfb45c3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:36:33,563 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 21:36:33,564 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 21:36:33,564 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:36:33,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:33,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:36:33,564 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:33,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:33,565 INFO L85 PathProgramCache]: Analyzing trace with hash 39944, now seen corresponding path program 1 times [2023-08-29 21:36:33,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:33,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149470222] [2023-08-29 21:36:33,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:33,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:33,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:33,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:33,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149470222] [2023-08-29 21:36:33,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149470222] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:36:33,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:36:33,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:36:33,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604597374] [2023-08-29 21:36:33,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:36:33,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:36:33,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:33,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:36:33,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:36:33,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 301 [2023-08-29 21:36:33,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 81 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:33,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:33,640 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 301 [2023-08-29 21:36:33,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:36,554 INFO L130 PetriNetUnfolder]: 26111/40287 cut-off events. [2023-08-29 21:36:36,554 INFO L131 PetriNetUnfolder]: For 901/901 co-relation queries the response was YES. [2023-08-29 21:36:36,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77971 conditions, 40287 events. 26111/40287 cut-off events. For 901/901 co-relation queries the response was YES. Maximal size of possible extension queue 1161. Compared 304131 event pairs, 17019 based on Foata normal form. 7936/42001 useless extension candidates. Maximal degree in co-relation 7057. Up to 37030 conditions per place. [2023-08-29 21:36:36,903 INFO L137 encePairwiseOnDemand]: 276/301 looper letters, 51 selfloop transitions, 2 changer transitions 2/69 dead transitions. [2023-08-29 21:36:36,903 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 69 transitions, 276 flow [2023-08-29 21:36:36,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:36:36,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:36:36,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 503 transitions. [2023-08-29 21:36:36,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5570321151716501 [2023-08-29 21:36:36,905 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 503 transitions. [2023-08-29 21:36:36,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 503 transitions. [2023-08-29 21:36:36,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:36,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 503 transitions. [2023-08-29 21:36:36,907 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 21:36:36,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 301.0) internal successors, (1204), 4 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:36,910 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 301.0) internal successors, (1204), 4 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:36,910 INFO L175 Difference]: Start difference. First operand has 64 places, 81 transitions, 192 flow. Second operand 3 states and 503 transitions. [2023-08-29 21:36:36,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 69 transitions, 276 flow [2023-08-29 21:36:36,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 69 transitions, 276 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:36:36,913 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 152 flow [2023-08-29 21:36:36,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=66, PETRI_TRANSITIONS=58} [2023-08-29 21:36:36,914 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 2 predicate places. [2023-08-29 21:36:36,914 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 152 flow [2023-08-29 21:36:36,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:36,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:36,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:36:36,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-29 21:36:36,915 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:36,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:36,915 INFO L85 PathProgramCache]: Analyzing trace with hash 39943, now seen corresponding path program 1 times [2023-08-29 21:36:36,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:36,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047614287] [2023-08-29 21:36:36,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:36,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:36,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:36,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:36,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:36,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047614287] [2023-08-29 21:36:36,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047614287] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:36:36,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:36:36,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:36:36,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276207086] [2023-08-29 21:36:36,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:36:36,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:36:36,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:36,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:36:36,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:36:36,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 301 [2023-08-29 21:36:36,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:36,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:36,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 301 [2023-08-29 21:36:36,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:39,150 INFO L130 PetriNetUnfolder]: 20656/31599 cut-off events. [2023-08-29 21:36:39,151 INFO L131 PetriNetUnfolder]: For 2054/2054 co-relation queries the response was YES. [2023-08-29 21:36:39,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63418 conditions, 31599 events. 20656/31599 cut-off events. For 2054/2054 co-relation queries the response was YES. Maximal size of possible extension queue 908. Compared 229256 event pairs, 18658 based on Foata normal form. 0/28309 useless extension candidates. Maximal degree in co-relation 63351. Up to 26598 conditions per place. [2023-08-29 21:36:39,330 INFO L137 encePairwiseOnDemand]: 297/301 looper letters, 62 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2023-08-29 21:36:39,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 78 transitions, 320 flow [2023-08-29 21:36:39,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:36:39,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:36:39,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 476 transitions. [2023-08-29 21:36:39,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5271317829457365 [2023-08-29 21:36:39,332 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 476 transitions. [2023-08-29 21:36:39,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 476 transitions. [2023-08-29 21:36:39,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:39,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 476 transitions. [2023-08-29 21:36:39,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:39,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 301.0) internal successors, (1204), 4 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:39,336 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 301.0) internal successors, (1204), 4 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:39,337 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 152 flow. Second operand 3 states and 476 transitions. [2023-08-29 21:36:39,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 78 transitions, 320 flow [2023-08-29 21:36:39,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 78 transitions, 316 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:36:39,346 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 148 flow [2023-08-29 21:36:39,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2023-08-29 21:36:39,347 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -2 predicate places. [2023-08-29 21:36:39,347 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 148 flow [2023-08-29 21:36:39,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:39,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:39,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:36:39,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-29 21:36:39,348 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:39,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:39,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1734117483, now seen corresponding path program 1 times [2023-08-29 21:36:39,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:39,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317976892] [2023-08-29 21:36:39,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:39,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:39,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:39,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:39,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:39,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317976892] [2023-08-29 21:36:39,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317976892] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:36:39,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83697904] [2023-08-29 21:36:39,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:39,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:36:39,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:36:39,429 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:36:39,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-29 21:36:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:39,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:36:39,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:36:39,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:36:39,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:39,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:36:39,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:39,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83697904] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:36:39,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:36:39,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-29 21:36:39,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583915749] [2023-08-29 21:36:39,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:36:39,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:36:39,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:39,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:36:39,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:36:39,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 301 [2023-08-29 21:36:39,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 148 flow. Second operand has 7 states, 7 states have (on average 138.71428571428572) internal successors, (971), 7 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:39,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:39,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 301 [2023-08-29 21:36:39,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:41,721 INFO L130 PetriNetUnfolder]: 19391/28823 cut-off events. [2023-08-29 21:36:41,722 INFO L131 PetriNetUnfolder]: For 1046/1046 co-relation queries the response was YES. [2023-08-29 21:36:41,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59139 conditions, 28823 events. 19391/28823 cut-off events. For 1046/1046 co-relation queries the response was YES. Maximal size of possible extension queue 809. Compared 200905 event pairs, 28 based on Foata normal form. 8/27299 useless extension candidates. Maximal degree in co-relation 52639. Up to 21379 conditions per place. [2023-08-29 21:36:41,857 INFO L137 encePairwiseOnDemand]: 296/301 looper letters, 114 selfloop transitions, 6 changer transitions 1/135 dead transitions. [2023-08-29 21:36:41,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 135 transitions, 558 flow [2023-08-29 21:36:41,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:36:41,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:36:41,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 947 transitions. [2023-08-29 21:36:41,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5243632336655593 [2023-08-29 21:36:41,866 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 947 transitions. [2023-08-29 21:36:41,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 947 transitions. [2023-08-29 21:36:41,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:41,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 947 transitions. [2023-08-29 21:36:41,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 157.83333333333334) internal successors, (947), 6 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:41,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 301.0) internal successors, (2107), 7 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:41,874 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 301.0) internal successors, (2107), 7 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:41,875 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 148 flow. Second operand 6 states and 947 transitions. [2023-08-29 21:36:41,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 135 transitions, 558 flow [2023-08-29 21:36:42,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 135 transitions, 552 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:36:42,031 INFO L231 Difference]: Finished difference. Result has 65 places, 57 transitions, 162 flow [2023-08-29 21:36:42,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=162, PETRI_PLACES=65, PETRI_TRANSITIONS=57} [2023-08-29 21:36:42,032 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 1 predicate places. [2023-08-29 21:36:42,032 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 57 transitions, 162 flow [2023-08-29 21:36:42,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 138.71428571428572) internal successors, (971), 7 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:42,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:42,033 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-29 21:36:42,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-29 21:36:42,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-29 21:36:42,238 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:42,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:42,239 INFO L85 PathProgramCache]: Analyzing trace with hash 771400413, now seen corresponding path program 1 times [2023-08-29 21:36:42,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:42,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558781926] [2023-08-29 21:36:42,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:42,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:42,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:42,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 21:36:42,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:42,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558781926] [2023-08-29 21:36:42,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558781926] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:36:42,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:36:42,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:36:42,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556147605] [2023-08-29 21:36:42,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:36:42,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:36:42,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:42,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:36:42,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:36:42,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 301 [2023-08-29 21:36:42,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 57 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:42,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:42,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 301 [2023-08-29 21:36:42,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:44,346 INFO L130 PetriNetUnfolder]: 24504/36599 cut-off events. [2023-08-29 21:36:44,346 INFO L131 PetriNetUnfolder]: For 6638/6638 co-relation queries the response was YES. [2023-08-29 21:36:44,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76406 conditions, 36599 events. 24504/36599 cut-off events. For 6638/6638 co-relation queries the response was YES. Maximal size of possible extension queue 981. Compared 253174 event pairs, 10615 based on Foata normal form. 0/34703 useless extension candidates. Maximal degree in co-relation 40460. Up to 33756 conditions per place. [2023-08-29 21:36:44,749 INFO L137 encePairwiseOnDemand]: 296/301 looper letters, 64 selfloop transitions, 4 changer transitions 0/80 dead transitions. [2023-08-29 21:36:44,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 80 transitions, 377 flow [2023-08-29 21:36:44,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:36:44,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:36:44,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 477 transitions. [2023-08-29 21:36:44,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5282392026578073 [2023-08-29 21:36:44,751 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 477 transitions. [2023-08-29 21:36:44,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 477 transitions. [2023-08-29 21:36:44,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:44,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 477 transitions. [2023-08-29 21:36:44,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:44,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 301.0) internal successors, (1204), 4 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:44,755 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 301.0) internal successors, (1204), 4 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:44,756 INFO L175 Difference]: Start difference. First operand has 65 places, 57 transitions, 162 flow. Second operand 3 states and 477 transitions. [2023-08-29 21:36:44,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 80 transitions, 377 flow [2023-08-29 21:36:44,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 80 transitions, 365 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-29 21:36:44,767 INFO L231 Difference]: Finished difference. Result has 66 places, 60 transitions, 181 flow [2023-08-29 21:36:44,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=66, PETRI_TRANSITIONS=60} [2023-08-29 21:36:44,768 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 2 predicate places. [2023-08-29 21:36:44,768 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 60 transitions, 181 flow [2023-08-29 21:36:44,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:44,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:44,769 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:36:44,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-29 21:36:44,769 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:44,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:44,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1581891607, now seen corresponding path program 1 times [2023-08-29 21:36:44,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:44,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770560870] [2023-08-29 21:36:44,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:44,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:44,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:44,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 21:36:44,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:44,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770560870] [2023-08-29 21:36:44,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770560870] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:36:44,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:36:44,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:36:44,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843079470] [2023-08-29 21:36:44,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:36:44,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:36:44,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:44,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:36:44,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:36:44,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 301 [2023-08-29 21:36:44,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 60 transitions, 181 flow. Second operand has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:44,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:44,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 301 [2023-08-29 21:36:44,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:46,416 INFO L130 PetriNetUnfolder]: 17708/26910 cut-off events. [2023-08-29 21:36:46,417 INFO L131 PetriNetUnfolder]: For 7063/7063 co-relation queries the response was YES. [2023-08-29 21:36:46,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58717 conditions, 26910 events. 17708/26910 cut-off events. For 7063/7063 co-relation queries the response was YES. Maximal size of possible extension queue 753. Compared 190556 event pairs, 11698 based on Foata normal form. 640/26512 useless extension candidates. Maximal degree in co-relation 36453. Up to 17917 conditions per place. [2023-08-29 21:36:46,682 INFO L137 encePairwiseOnDemand]: 298/301 looper letters, 75 selfloop transitions, 2 changer transitions 0/91 dead transitions. [2023-08-29 21:36:46,682 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 91 transitions, 420 flow [2023-08-29 21:36:46,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:36:46,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:36:46,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 492 transitions. [2023-08-29 21:36:46,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5448504983388704 [2023-08-29 21:36:46,685 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 492 transitions. [2023-08-29 21:36:46,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 492 transitions. [2023-08-29 21:36:46,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:46,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 492 transitions. [2023-08-29 21:36:46,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:46,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 301.0) internal successors, (1204), 4 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:46,689 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 301.0) internal successors, (1204), 4 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:46,689 INFO L175 Difference]: Start difference. First operand has 66 places, 60 transitions, 181 flow. Second operand 3 states and 492 transitions. [2023-08-29 21:36:46,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 91 transitions, 420 flow [2023-08-29 21:36:46,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 91 transitions, 413 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:36:46,694 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 191 flow [2023-08-29 21:36:46,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=191, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2023-08-29 21:36:46,695 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 4 predicate places. [2023-08-29 21:36:46,695 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 191 flow [2023-08-29 21:36:46,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:46,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:46,696 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:36:46,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-29 21:36:46,696 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:46,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:46,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1581891673, now seen corresponding path program 1 times [2023-08-29 21:36:46,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:46,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412520502] [2023-08-29 21:36:46,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:46,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:46,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:46,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 21:36:46,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:46,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412520502] [2023-08-29 21:36:46,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412520502] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:36:46,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127037279] [2023-08-29 21:36:46,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:46,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:36:46,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:36:46,783 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:36:46,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-29 21:36:46,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:46,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 21:36:46,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:36:46,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:46,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:36:46,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:46,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127037279] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:36:46,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:36:46,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-08-29 21:36:46,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542709921] [2023-08-29 21:36:46,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:36:46,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 21:36:46,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:46,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 21:36:46,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2023-08-29 21:36:47,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 301 [2023-08-29 21:36:47,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 191 flow. Second operand has 12 states, 12 states have (on average 133.66666666666666) internal successors, (1604), 12 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:47,039 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:47,039 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 301 [2023-08-29 21:36:47,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:47,560 INFO L130 PetriNetUnfolder]: 4342/6717 cut-off events. [2023-08-29 21:36:47,560 INFO L131 PetriNetUnfolder]: For 3858/3858 co-relation queries the response was YES. [2023-08-29 21:36:47,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15206 conditions, 6717 events. 4342/6717 cut-off events. For 3858/3858 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 40317 event pairs, 448 based on Foata normal form. 640/7356 useless extension candidates. Maximal degree in co-relation 15196. Up to 4192 conditions per place. [2023-08-29 21:36:47,580 INFO L137 encePairwiseOnDemand]: 298/301 looper letters, 0 selfloop transitions, 0 changer transitions 96/96 dead transitions. [2023-08-29 21:36:47,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 96 transitions, 423 flow [2023-08-29 21:36:47,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:36:47,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:36:47,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 864 transitions. [2023-08-29 21:36:47,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47840531561461797 [2023-08-29 21:36:47,582 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 864 transitions. [2023-08-29 21:36:47,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 864 transitions. [2023-08-29 21:36:47,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:47,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 864 transitions. [2023-08-29 21:36:47,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:47,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 301.0) internal successors, (2107), 7 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:47,588 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 301.0) internal successors, (2107), 7 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:47,588 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 191 flow. Second operand 6 states and 864 transitions. [2023-08-29 21:36:47,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 96 transitions, 423 flow [2023-08-29 21:36:47,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 96 transitions, 415 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-29 21:36:47,592 INFO L231 Difference]: Finished difference. Result has 59 places, 0 transitions, 0 flow [2023-08-29 21:36:47,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=59, PETRI_TRANSITIONS=0} [2023-08-29 21:36:47,592 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -5 predicate places. [2023-08-29 21:36:47,592 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 0 transitions, 0 flow [2023-08-29 21:36:47,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 133.66666666666666) internal successors, (1604), 12 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:47,593 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (5 of 6 remaining) [2023-08-29 21:36:47,593 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2023-08-29 21:36:47,593 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 6 remaining) [2023-08-29 21:36:47,594 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-08-29 21:36:47,594 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 6 remaining) [2023-08-29 21:36:47,594 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 6 remaining) [2023-08-29 21:36:47,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-29 21:36:47,803 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,SelfDestructingSolverStorable17 [2023-08-29 21:36:47,804 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-29 21:36:47,804 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:36:47,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 175 transitions, 380 flow [2023-08-29 21:36:47,836 INFO L130 PetriNetUnfolder]: 50/400 cut-off events. [2023-08-29 21:36:47,836 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:36:47,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 428 conditions, 400 events. 50/400 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1445 event pairs, 1 based on Foata normal form. 0/310 useless extension candidates. Maximal degree in co-relation 264. Up to 16 conditions per place. [2023-08-29 21:36:47,839 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 175 transitions, 380 flow [2023-08-29 21:36:47,841 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 156 places, 175 transitions, 380 flow [2023-08-29 21:36:47,841 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:36:47,842 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 156 places, 175 transitions, 380 flow [2023-08-29 21:36:47,842 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 156 places, 175 transitions, 380 flow [2023-08-29 21:36:47,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 175 transitions, 380 flow [2023-08-29 21:36:47,871 INFO L130 PetriNetUnfolder]: 50/400 cut-off events. [2023-08-29 21:36:47,872 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:36:47,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 428 conditions, 400 events. 50/400 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1445 event pairs, 1 based on Foata normal form. 0/310 useless extension candidates. Maximal degree in co-relation 264. Up to 16 conditions per place. [2023-08-29 21:36:47,881 INFO L119 LiptonReduction]: Number of co-enabled transitions 15300 [2023-08-29 21:36:50,333 INFO L134 LiptonReduction]: Checked pairs total: 35974 [2023-08-29 21:36:50,333 INFO L136 LiptonReduction]: Total number of compositions: 126 [2023-08-29 21:36:50,335 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:36:50,335 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;@7dfb45c3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:36:50,335 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:36:50,343 INFO L130 PetriNetUnfolder]: 22/112 cut-off events. [2023-08-29 21:36:50,344 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-29 21:36:50,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:50,344 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-29 21:36:50,344 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:36:50,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:50,345 INFO L85 PathProgramCache]: Analyzing trace with hash -2099047879, now seen corresponding path program 1 times [2023-08-29 21:36:50,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:50,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992063382] [2023-08-29 21:36:50,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:50,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:50,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:36:50,357 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:36:50,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:36:50,368 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:36:50,368 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:36:50,369 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:36:50,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-29 21:36:50,369 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:36:50,370 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:36:50,370 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:36:50,370 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-29 21:36:50,387 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-29 21:36:50,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 207 transitions, 458 flow [2023-08-29 21:36:50,454 INFO L130 PetriNetUnfolder]: 81/628 cut-off events. [2023-08-29 21:36:50,454 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:36:50,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 683 conditions, 628 events. 81/628 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2620 event pairs, 6 based on Foata normal form. 0/484 useless extension candidates. Maximal degree in co-relation 420. Up to 32 conditions per place. [2023-08-29 21:36:50,461 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 207 transitions, 458 flow [2023-08-29 21:36:50,464 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 207 transitions, 458 flow [2023-08-29 21:36:50,465 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:36:50,465 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 183 places, 207 transitions, 458 flow [2023-08-29 21:36:50,465 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 183 places, 207 transitions, 458 flow [2023-08-29 21:36:50,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 207 transitions, 458 flow [2023-08-29 21:36:50,529 INFO L130 PetriNetUnfolder]: 81/628 cut-off events. [2023-08-29 21:36:50,529 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:36:50,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 683 conditions, 628 events. 81/628 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2620 event pairs, 6 based on Foata normal form. 0/484 useless extension candidates. Maximal degree in co-relation 420. Up to 32 conditions per place. [2023-08-29 21:36:50,550 INFO L119 LiptonReduction]: Number of co-enabled transitions 24360 [2023-08-29 21:36:52,872 INFO L134 LiptonReduction]: Checked pairs total: 60573 [2023-08-29 21:36:52,872 INFO L136 LiptonReduction]: Total number of compositions: 141 [2023-08-29 21:36:52,873 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:36:52,874 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;@7dfb45c3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:36:52,874 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 21:36:52,875 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-29 21:36:52,875 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:36:52,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:52,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:36:52,876 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:52,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:52,876 INFO L85 PathProgramCache]: Analyzing trace with hash 56130, now seen corresponding path program 1 times [2023-08-29 21:36:52,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:52,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829857200] [2023-08-29 21:36:52,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:52,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:52,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:52,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:52,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:52,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829857200] [2023-08-29 21:36:52,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829857200] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:36:52,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:36:52,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:36:52,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934636621] [2023-08-29 21:36:52,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:36:52,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:36:52,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:52,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:36:52,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:36:52,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 348 [2023-08-29 21:36:52,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 100 transitions, 244 flow. Second operand has 3 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 21:36:52,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:52,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 348 [2023-08-29 21:36:52,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:37:16,517 INFO L130 PetriNetUnfolder]: 254733/354065 cut-off events. [2023-08-29 21:37:16,517 INFO L131 PetriNetUnfolder]: For 12134/12134 co-relation queries the response was YES. [2023-08-29 21:37:17,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 695305 conditions, 354065 events. 254733/354065 cut-off events. For 12134/12134 co-relation queries the response was YES. Maximal size of possible extension queue 8231. Compared 2850515 event pairs, 208873 based on Foata normal form. 76955/389255 useless extension candidates. Maximal degree in co-relation 66279. Up to 274924 conditions per place. [2023-08-29 21:37:18,387 INFO L137 encePairwiseOnDemand]: 316/348 looper letters, 77 selfloop transitions, 2 changer transitions 2/99 dead transitions. [2023-08-29 21:37:18,387 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 99 transitions, 402 flow [2023-08-29 21:37:18,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:37:18,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:37:18,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 616 transitions. [2023-08-29 21:37:18,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5900383141762452 [2023-08-29 21:37:18,389 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 616 transitions. [2023-08-29 21:37:18,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 616 transitions. [2023-08-29 21:37:18,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:37:18,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 616 transitions. [2023-08-29 21:37:18,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.33333333333334) internal successors, (616), 3 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:37:18,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:37:18,393 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:37:18,393 INFO L175 Difference]: Start difference. First operand has 78 places, 100 transitions, 244 flow. Second operand 3 states and 616 transitions. [2023-08-29 21:37:18,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 99 transitions, 402 flow [2023-08-29 21:37:18,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 99 transitions, 402 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:37:18,397 INFO L231 Difference]: Finished difference. Result has 77 places, 68 transitions, 176 flow [2023-08-29 21:37:18,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=77, PETRI_TRANSITIONS=68} [2023-08-29 21:37:18,398 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -1 predicate places. [2023-08-29 21:37:18,398 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 68 transitions, 176 flow [2023-08-29 21:37:18,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 21:37:18,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:37:18,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:37:18,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-29 21:37:18,399 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:37:18,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:37:18,400 INFO L85 PathProgramCache]: Analyzing trace with hash 56131, now seen corresponding path program 1 times [2023-08-29 21:37:18,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:37:18,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980610396] [2023-08-29 21:37:18,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:37:18,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:37:18,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:37:18,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:37:18,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:37:18,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980610396] [2023-08-29 21:37:18,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980610396] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:37:18,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:37:18,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:37:18,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575206799] [2023-08-29 21:37:18,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:37:18,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:37:18,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:37:18,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:37:18,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:37:18,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 348 [2023-08-29 21:37:18,461 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 68 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:37:18,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:37:18,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 348 [2023-08-29 21:37:18,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:37:38,666 INFO L130 PetriNetUnfolder]: 232212/325461 cut-off events. [2023-08-29 21:37:38,666 INFO L131 PetriNetUnfolder]: For 15830/15830 co-relation queries the response was YES. [2023-08-29 21:37:39,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 643281 conditions, 325461 events. 232212/325461 cut-off events. For 15830/15830 co-relation queries the response was YES. Maximal size of possible extension queue 7708. Compared 2611304 event pairs, 222835 based on Foata normal form. 0/299138 useless extension candidates. Maximal degree in co-relation 575148. Up to 304629 conditions per place. [2023-08-29 21:37:40,456 INFO L137 encePairwiseOnDemand]: 344/348 looper letters, 57 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2023-08-29 21:37:40,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 77 transitions, 312 flow [2023-08-29 21:37:40,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:37:40,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:37:40,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 553 transitions. [2023-08-29 21:37:40,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296934865900383 [2023-08-29 21:37:40,458 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 553 transitions. [2023-08-29 21:37:40,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 553 transitions. [2023-08-29 21:37:40,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:37:40,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 553 transitions. [2023-08-29 21:37:40,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:37:40,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:37:40,462 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:37:40,462 INFO L175 Difference]: Start difference. First operand has 77 places, 68 transitions, 176 flow. Second operand 3 states and 553 transitions. [2023-08-29 21:37:40,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 77 transitions, 312 flow [2023-08-29 21:37:43,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 77 transitions, 306 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:37:43,503 INFO L231 Difference]: Finished difference. Result has 75 places, 69 transitions, 184 flow [2023-08-29 21:37:43,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=75, PETRI_TRANSITIONS=69} [2023-08-29 21:37:43,504 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -3 predicate places. [2023-08-29 21:37:43,504 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 69 transitions, 184 flow [2023-08-29 21:37:43,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:37:43,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:37:43,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:37:43,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-29 21:37:43,505 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:37:43,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:37:43,506 INFO L85 PathProgramCache]: Analyzing trace with hash 345040017, now seen corresponding path program 1 times [2023-08-29 21:37:43,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:37:43,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670047666] [2023-08-29 21:37:43,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:37:43,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:37:43,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:37:43,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:37:43,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:37:43,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670047666] [2023-08-29 21:37:43,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670047666] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:37:43,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943289808] [2023-08-29 21:37:43,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:37:43,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:37:43,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:37:43,580 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:37:43,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-29 21:37:43,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:37:43,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:37:43,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:37:43,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:37:43,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:37:43,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:37:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:37:43,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943289808] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:37:43,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:37:43,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-29 21:37:43,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362935601] [2023-08-29 21:37:43,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:37:43,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:37:43,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:37:43,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:37:43,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:37:43,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 348 [2023-08-29 21:37:43,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 69 transitions, 184 flow. Second operand has 7 states, 7 states have (on average 162.71428571428572) internal successors, (1139), 7 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:37:43,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:37:43,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 348 [2023-08-29 21:37:43,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:38:02,606 INFO L130 PetriNetUnfolder]: 236806/325295 cut-off events. [2023-08-29 21:38:02,607 INFO L131 PetriNetUnfolder]: For 16501/16501 co-relation queries the response was YES. [2023-08-29 21:38:03,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 657091 conditions, 325295 events. 236806/325295 cut-off events. For 16501/16501 co-relation queries the response was YES. Maximal size of possible extension queue 7616. Compared 2503706 event pairs, 40379 based on Foata normal form. 8/299631 useless extension candidates. Maximal degree in co-relation 576627. Up to 252172 conditions per place. [2023-08-29 21:38:04,236 INFO L137 encePairwiseOnDemand]: 342/348 looper letters, 144 selfloop transitions, 7 changer transitions 1/170 dead transitions. [2023-08-29 21:38:04,237 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 170 transitions, 713 flow [2023-08-29 21:38:04,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:38:04,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:38:04,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1122 transitions. [2023-08-29 21:38:04,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5373563218390804 [2023-08-29 21:38:04,239 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1122 transitions. [2023-08-29 21:38:04,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1122 transitions. [2023-08-29 21:38:04,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:38:04,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1122 transitions. [2023-08-29 21:38:04,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 187.0) internal successors, (1122), 6 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:04,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 348.0) internal successors, (2436), 7 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:04,258 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 348.0) internal successors, (2436), 7 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:04,258 INFO L175 Difference]: Start difference. First operand has 75 places, 69 transitions, 184 flow. Second operand 6 states and 1122 transitions. [2023-08-29 21:38:04,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 170 transitions, 713 flow [2023-08-29 21:38:04,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 170 transitions, 711 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:38:04,263 INFO L231 Difference]: Finished difference. Result has 83 places, 73 transitions, 232 flow [2023-08-29 21:38:04,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=232, PETRI_PLACES=83, PETRI_TRANSITIONS=73} [2023-08-29 21:38:04,264 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 5 predicate places. [2023-08-29 21:38:04,264 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 73 transitions, 232 flow [2023-08-29 21:38:04,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 162.71428571428572) internal successors, (1139), 7 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:04,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:38:04,265 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-29 21:38:04,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-29 21:38:04,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:38:04,470 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:38:04,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:38:04,471 INFO L85 PathProgramCache]: Analyzing trace with hash -731178251, now seen corresponding path program 1 times [2023-08-29 21:38:04,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:38:04,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483666908] [2023-08-29 21:38:04,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:38:04,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:38:04,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:38:04,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 21:38:04,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:38:04,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483666908] [2023-08-29 21:38:04,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483666908] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:38:04,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:38:04,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:38:04,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854933168] [2023-08-29 21:38:04,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:38:04,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:38:04,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:38:04,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:38:04,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:38:04,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 348 [2023-08-29 21:38:04,544 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 73 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:04,544 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:38:04,544 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 348 [2023-08-29 21:38:04,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:38:31,622 INFO L130 PetriNetUnfolder]: 317531/433689 cut-off events. [2023-08-29 21:38:31,622 INFO L131 PetriNetUnfolder]: For 156643/156643 co-relation queries the response was YES. [2023-08-29 21:38:32,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 933534 conditions, 433689 events. 317531/433689 cut-off events. For 156643/156643 co-relation queries the response was YES. Maximal size of possible extension queue 9398. Compared 3320872 event pairs, 159312 based on Foata normal form. 0/414792 useless extension candidates. Maximal degree in co-relation 511197. Up to 412179 conditions per place. [2023-08-29 21:38:34,237 INFO L137 encePairwiseOnDemand]: 342/348 looper letters, 83 selfloop transitions, 5 changer transitions 0/103 dead transitions. [2023-08-29 21:38:34,237 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 103 transitions, 535 flow [2023-08-29 21:38:34,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:38:34,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:38:34,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 559 transitions. [2023-08-29 21:38:34,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5354406130268199 [2023-08-29 21:38:34,238 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 559 transitions. [2023-08-29 21:38:34,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 559 transitions. [2023-08-29 21:38:34,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:38:34,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 559 transitions. [2023-08-29 21:38:34,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:34,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:34,241 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:34,241 INFO L175 Difference]: Start difference. First operand has 83 places, 73 transitions, 232 flow. Second operand 3 states and 559 transitions. [2023-08-29 21:38:34,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 103 transitions, 535 flow [2023-08-29 21:38:34,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 103 transitions, 525 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-29 21:38:34,318 INFO L231 Difference]: Finished difference. Result has 84 places, 77 transitions, 259 flow [2023-08-29 21:38:34,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=259, PETRI_PLACES=84, PETRI_TRANSITIONS=77} [2023-08-29 21:38:34,319 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 6 predicate places. [2023-08-29 21:38:34,319 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 77 transitions, 259 flow [2023-08-29 21:38:34,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:34,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:38:34,319 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:38:34,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-29 21:38:34,320 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:38:34,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:38:34,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1544002635, now seen corresponding path program 1 times [2023-08-29 21:38:34,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:38:34,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763934190] [2023-08-29 21:38:34,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:38:34,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:38:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:38:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 21:38:34,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:38:34,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763934190] [2023-08-29 21:38:34,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763934190] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:38:34,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:38:34,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:38:34,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112677502] [2023-08-29 21:38:34,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:38:34,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:38:34,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:38:34,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:38:34,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:38:34,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 348 [2023-08-29 21:38:34,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 77 transitions, 259 flow. Second operand has 3 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:34,376 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:38:34,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 348 [2023-08-29 21:38:34,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:38:57,285 INFO L130 PetriNetUnfolder]: 243334/339289 cut-off events. [2023-08-29 21:38:57,285 INFO L131 PetriNetUnfolder]: For 139394/139394 co-relation queries the response was YES. [2023-08-29 21:38:58,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 749145 conditions, 339289 events. 243334/339289 cut-off events. For 139394/139394 co-relation queries the response was YES. Maximal size of possible extension queue 7945. Compared 2713795 event pairs, 168416 based on Foata normal form. 6414/329904 useless extension candidates. Maximal degree in co-relation 514689. Up to 228550 conditions per place. [2023-08-29 21:38:59,712 INFO L137 encePairwiseOnDemand]: 345/348 looper letters, 93 selfloop transitions, 2 changer transitions 0/115 dead transitions. [2023-08-29 21:38:59,712 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 115 transitions, 545 flow [2023-08-29 21:38:59,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:38:59,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:38:59,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 582 transitions. [2023-08-29 21:38:59,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574712643678161 [2023-08-29 21:38:59,714 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 582 transitions. [2023-08-29 21:38:59,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 582 transitions. [2023-08-29 21:38:59,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:38:59,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 582 transitions. [2023-08-29 21:38:59,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.0) internal successors, (582), 3 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:59,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:59,718 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:59,718 INFO L175 Difference]: Start difference. First operand has 84 places, 77 transitions, 259 flow. Second operand 3 states and 582 transitions. [2023-08-29 21:38:59,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 115 transitions, 545 flow [2023-08-29 21:38:59,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 115 transitions, 538 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:38:59,759 INFO L231 Difference]: Finished difference. Result has 86 places, 78 transitions, 270 flow [2023-08-29 21:38:59,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=86, PETRI_TRANSITIONS=78} [2023-08-29 21:38:59,760 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 8 predicate places. [2023-08-29 21:38:59,760 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 78 transitions, 270 flow [2023-08-29 21:38:59,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:59,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:38:59,760 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:38:59,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-29 21:38:59,761 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:38:59,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:38:59,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1544002564, now seen corresponding path program 1 times [2023-08-29 21:38:59,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:38:59,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008648474] [2023-08-29 21:38:59,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:38:59,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:38:59,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:38:59,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 21:38:59,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:38:59,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008648474] [2023-08-29 21:38:59,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008648474] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:38:59,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117297250] [2023-08-29 21:38:59,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:38:59,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:38:59,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:38:59,840 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:38:59,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-29 21:38:59,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:38:59,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 21:38:59,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:38:59,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:38:59,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:38:59,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:38:59,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117297250] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:38:59,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:38:59,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-08-29 21:38:59,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169477483] [2023-08-29 21:38:59,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:38:59,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 21:38:59,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:38:59,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 21:38:59,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2023-08-29 21:39:00,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 348 [2023-08-29 21:39:00,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 78 transitions, 270 flow. Second operand has 12 states, 12 states have (on average 157.66666666666666) internal successors, (1892), 12 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:39:00,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:39:00,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 348 [2023-08-29 21:39:00,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:39:05,137 INFO L130 PetriNetUnfolder]: 57832/80110 cut-off events. [2023-08-29 21:39:05,137 INFO L131 PetriNetUnfolder]: For 56372/56372 co-relation queries the response was YES. [2023-08-29 21:39:05,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206416 conditions, 80110 events. 57832/80110 cut-off events. For 56372/56372 co-relation queries the response was YES. Maximal size of possible extension queue 2306. Compared 550325 event pairs, 4980 based on Foata normal form. 6360/85786 useless extension candidates. Maximal degree in co-relation 206403. Up to 50760 conditions per place. [2023-08-29 21:39:05,611 INFO L137 encePairwiseOnDemand]: 345/348 looper letters, 116 selfloop transitions, 5 changer transitions 0/139 dead transitions. [2023-08-29 21:39:05,611 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 139 transitions, 616 flow [2023-08-29 21:39:05,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 21:39:05,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 21:39:05,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1203 transitions. [2023-08-29 21:39:05,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4938423645320197 [2023-08-29 21:39:05,614 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1203 transitions. [2023-08-29 21:39:05,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1203 transitions. [2023-08-29 21:39:05,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:39:05,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1203 transitions. [2023-08-29 21:39:05,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 171.85714285714286) internal successors, (1203), 7 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:39:05,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 348.0) internal successors, (2784), 8 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:39:05,620 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 348.0) internal successors, (2784), 8 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:39:05,620 INFO L175 Difference]: Start difference. First operand has 86 places, 78 transitions, 270 flow. Second operand 7 states and 1203 transitions. [2023-08-29 21:39:05,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 139 transitions, 616 flow [2023-08-29 21:39:05,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 139 transitions, 604 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-29 21:39:05,645 INFO L231 Difference]: Finished difference. Result has 79 places, 60 transitions, 192 flow [2023-08-29 21:39:05,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=192, PETRI_PLACES=79, PETRI_TRANSITIONS=60} [2023-08-29 21:39:05,646 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 1 predicate places. [2023-08-29 21:39:05,646 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 60 transitions, 192 flow [2023-08-29 21:39:05,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 157.66666666666666) internal successors, (1892), 12 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:39:05,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:39:05,647 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-29 21:39:05,651 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 21:39:05,847 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 21:39:05,847 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:39:05,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:39:05,848 INFO L85 PathProgramCache]: Analyzing trace with hash -658746699, now seen corresponding path program 1 times [2023-08-29 21:39:05,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:39:05,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803911000] [2023-08-29 21:39:05,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:39:05,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:39:05,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:39:06,025 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:39:06,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:39:06,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803911000] [2023-08-29 21:39:06,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803911000] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:39:06,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526807242] [2023-08-29 21:39:06,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:39:06,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:39:06,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:39:06,029 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:39:06,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-29 21:39:06,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:39:06,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 21:39:06,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:39:06,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:39:06,253 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:39:06,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:39:06,384 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:39:06,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526807242] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:39:06,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:39:06,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-08-29 21:39:06,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773087402] [2023-08-29 21:39:06,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:39:06,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-29 21:39:06,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:39:06,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-29 21:39:06,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2023-08-29 21:39:06,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 348 [2023-08-29 21:39:06,714 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 60 transitions, 192 flow. Second operand has 17 states, 17 states have (on average 162.47058823529412) internal successors, (2762), 17 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:39:06,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:39:06,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 348 [2023-08-29 21:39:06,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:39:10,161 INFO L130 PetriNetUnfolder]: 38089/54571 cut-off events. [2023-08-29 21:39:10,161 INFO L131 PetriNetUnfolder]: For 60746/60746 co-relation queries the response was YES. [2023-08-29 21:39:10,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124351 conditions, 54571 events. 38089/54571 cut-off events. For 60746/60746 co-relation queries the response was YES. Maximal size of possible extension queue 1626. Compared 378432 event pairs, 4548 based on Foata normal form. 5724/59752 useless extension candidates. Maximal degree in co-relation 124338. Up to 25299 conditions per place. [2023-08-29 21:39:10,374 INFO L137 encePairwiseOnDemand]: 345/348 looper letters, 0 selfloop transitions, 0 changer transitions 138/138 dead transitions. [2023-08-29 21:39:10,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 138 transitions, 602 flow [2023-08-29 21:39:10,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 21:39:10,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 21:39:10,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1235 transitions. [2023-08-29 21:39:10,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069786535303776 [2023-08-29 21:39:10,377 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1235 transitions. [2023-08-29 21:39:10,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1235 transitions. [2023-08-29 21:39:10,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:39:10,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1235 transitions. [2023-08-29 21:39:10,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 176.42857142857142) internal successors, (1235), 7 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:39:10,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 348.0) internal successors, (2784), 8 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:39:10,383 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 348.0) internal successors, (2784), 8 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:39:10,383 INFO L175 Difference]: Start difference. First operand has 79 places, 60 transitions, 192 flow. Second operand 7 states and 1235 transitions. [2023-08-29 21:39:10,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 138 transitions, 602 flow [2023-08-29 21:39:10,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 138 transitions, 585 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-08-29 21:39:10,398 INFO L231 Difference]: Finished difference. Result has 75 places, 0 transitions, 0 flow [2023-08-29 21:39:10,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=75, PETRI_TRANSITIONS=0} [2023-08-29 21:39:10,399 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -3 predicate places. [2023-08-29 21:39:10,399 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 0 transitions, 0 flow [2023-08-29 21:39:10,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 162.47058823529412) internal successors, (2762), 17 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:39:10,399 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (5 of 6 remaining) [2023-08-29 21:39:10,400 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2023-08-29 21:39:10,400 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 6 remaining) [2023-08-29 21:39:10,400 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-08-29 21:39:10,400 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 6 remaining) [2023-08-29 21:39:10,400 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 6 remaining) [2023-08-29 21:39:10,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-29 21:39:10,604 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 21:39:10,605 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:39:10,605 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:39:10,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 207 transitions, 458 flow [2023-08-29 21:39:10,645 INFO L130 PetriNetUnfolder]: 81/628 cut-off events. [2023-08-29 21:39:10,646 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:39:10,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 683 conditions, 628 events. 81/628 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2620 event pairs, 6 based on Foata normal form. 0/484 useless extension candidates. Maximal degree in co-relation 420. Up to 32 conditions per place. [2023-08-29 21:39:10,651 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 207 transitions, 458 flow [2023-08-29 21:39:10,653 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 207 transitions, 458 flow [2023-08-29 21:39:10,653 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:39:10,653 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 183 places, 207 transitions, 458 flow [2023-08-29 21:39:10,653 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 183 places, 207 transitions, 458 flow [2023-08-29 21:39:10,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 207 transitions, 458 flow [2023-08-29 21:39:10,691 INFO L130 PetriNetUnfolder]: 81/628 cut-off events. [2023-08-29 21:39:10,691 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:39:10,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 683 conditions, 628 events. 81/628 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2620 event pairs, 6 based on Foata normal form. 0/484 useless extension candidates. Maximal degree in co-relation 420. Up to 32 conditions per place. [2023-08-29 21:39:10,710 INFO L119 LiptonReduction]: Number of co-enabled transitions 24360 [2023-08-29 21:39:12,942 INFO L134 LiptonReduction]: Checked pairs total: 54454 [2023-08-29 21:39:12,943 INFO L136 LiptonReduction]: Total number of compositions: 142 [2023-08-29 21:39:12,944 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:39:12,946 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;@7dfb45c3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:39:12,946 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:39:12,955 INFO L130 PetriNetUnfolder]: 29/155 cut-off events. [2023-08-29 21:39:12,956 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-29 21:39:12,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:39:12,956 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-29 21:39:12,956 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:39:12,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:39:12,957 INFO L85 PathProgramCache]: Analyzing trace with hash -2112256116, now seen corresponding path program 1 times [2023-08-29 21:39:12,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:39:12,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675276005] [2023-08-29 21:39:12,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:39:12,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:39:12,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:39:12,970 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:39:12,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:39:12,999 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:39:13,000 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:39:13,000 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:39:13,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-29 21:39:13,001 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:39:13,001 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:39:13,001 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:39:13,001 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-29 21:39:13,029 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-29 21:39:13,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 239 transitions, 538 flow [2023-08-29 21:39:13,123 INFO L130 PetriNetUnfolder]: 140/1028 cut-off events. [2023-08-29 21:39:13,123 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-29 21:39:13,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1139 conditions, 1028 events. 140/1028 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5125 event pairs, 23 based on Foata normal form. 0/790 useless extension candidates. Maximal degree in co-relation 673. Up to 80 conditions per place. [2023-08-29 21:39:13,134 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 239 transitions, 538 flow [2023-08-29 21:39:13,139 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 210 places, 239 transitions, 538 flow [2023-08-29 21:39:13,139 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:39:13,139 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 210 places, 239 transitions, 538 flow [2023-08-29 21:39:13,139 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 210 places, 239 transitions, 538 flow [2023-08-29 21:39:13,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 239 transitions, 538 flow [2023-08-29 21:39:13,218 INFO L130 PetriNetUnfolder]: 140/1028 cut-off events. [2023-08-29 21:39:13,218 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-29 21:39:13,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1139 conditions, 1028 events. 140/1028 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5125 event pairs, 23 based on Foata normal form. 0/790 useless extension candidates. Maximal degree in co-relation 673. Up to 80 conditions per place. [2023-08-29 21:39:13,250 INFO L119 LiptonReduction]: Number of co-enabled transitions 35400 [2023-08-29 21:39:15,403 INFO L134 LiptonReduction]: Checked pairs total: 91036 [2023-08-29 21:39:15,403 INFO L136 LiptonReduction]: Total number of compositions: 155 [2023-08-29 21:39:15,404 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:39:15,406 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;@7dfb45c3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:39:15,406 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 21:39:15,407 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 21:39:15,407 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:39:15,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:39:15,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:39:15,407 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:39:15,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:39:15,408 INFO L85 PathProgramCache]: Analyzing trace with hash 74325, now seen corresponding path program 1 times [2023-08-29 21:39:15,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:39:15,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971406588] [2023-08-29 21:39:15,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:39:15,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:39:15,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:39:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:39:15,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:39:15,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971406588] [2023-08-29 21:39:15,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971406588] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:39:15,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:39:15,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:39:15,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991630878] [2023-08-29 21:39:15,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:39:15,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:39:15,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:39:15,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:39:15,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:39:15,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 394 [2023-08-29 21:39:15,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 119 transitions, 298 flow. Second operand has 3 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:39:15,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:39:15,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 394 [2023-08-29 21:39:15,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand