./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_22-deref_read_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_22-deref_read_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 4ce97f399f5ab540e05119d9433f4e1bfecfe892f8e87faddc6435387a55a4d6 --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 21:42:14,719 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 21:42:14,721 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 21:42:14,752 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 21:42:14,753 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 21:42:14,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 21:42:14,756 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 21:42:14,758 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 21:42:14,759 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 21:42:14,763 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 21:42:14,763 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 21:42:14,765 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 21:42:14,765 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 21:42:14,766 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 21:42:14,767 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 21:42:14,772 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 21:42:14,773 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 21:42:14,774 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 21:42:14,775 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 21:42:14,778 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 21:42:14,783 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 21:42:14,783 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 21:42:14,784 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 21:42:14,785 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 21:42:14,789 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 21:42:14,790 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 21:42:14,790 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 21:42:14,791 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 21:42:14,791 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 21:42:14,792 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 21:42:14,792 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 21:42:14,793 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 21:42:14,794 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 21:42:14,795 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 21:42:14,796 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 21:42:14,796 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 21:42:14,796 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 21:42:14,796 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 21:42:14,797 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 21:42:14,797 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 21:42:14,797 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 21:42:14,799 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 21:42:14,826 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 21:42:14,827 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 21:42:14,828 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 21:42:14,828 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 21:42:14,828 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 21:42:14,828 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 21:42:14,829 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 21:42:14,829 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 21:42:14,829 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 21:42:14,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 21:42:14,830 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 21:42:14,830 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 21:42:14,830 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 21:42:14,830 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 21:42:14,830 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 21:42:14,831 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 21:42:14,831 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 21:42:14,831 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 21:42:14,831 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 21:42:14,831 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 21:42:14,831 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 21:42:14,831 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 21:42:14,832 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 21:42:14,832 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 21:42:14,832 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 21:42:14,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:42:14,832 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 21:42:14,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 21:42:14,833 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 21:42:14,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 21:42:14,833 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 21:42:14,833 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 21:42:14,833 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 21:42:14,833 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 21:42:14,834 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ce97f399f5ab540e05119d9433f4e1bfecfe892f8e87faddc6435387a55a4d6 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 21:42:15,035 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 21:42:15,048 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 21:42:15,049 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 21:42:15,050 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 21:42:15,050 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 21:42:15,051 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_22-deref_read_racefree.i [2023-08-29 21:42:16,078 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 21:42:16,236 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 21:42:16,237 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_22-deref_read_racefree.i [2023-08-29 21:42:16,243 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf3d1a589/45f02f4b89bc4bc7a55bb234ca4d9cd3/FLAG55ad348d5 [2023-08-29 21:42:16,254 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf3d1a589/45f02f4b89bc4bc7a55bb234ca4d9cd3 [2023-08-29 21:42:16,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 21:42:16,258 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 21:42:16,261 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 21:42:16,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 21:42:16,263 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 21:42:16,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:42:16" (1/1) ... [2023-08-29 21:42:16,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41565dcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:42:16, skipping insertion in model container [2023-08-29 21:42:16,264 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:42:16" (1/1) ... [2023-08-29 21:42:16,268 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 21:42:16,299 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 21:42:16,462 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_22-deref_read_racefree.i[30176,30189] [2023-08-29 21:42:16,475 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:42:16,486 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 21:42:16,519 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_22-deref_read_racefree.i[30176,30189] [2023-08-29 21:42:16,540 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:42:16,581 INFO L208 MainTranslator]: Completed translation [2023-08-29 21:42:16,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:42:16 WrapperNode [2023-08-29 21:42:16,581 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 21:42:16,582 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 21:42:16,582 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 21:42:16,583 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 21:42:16,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:42:16" (1/1) ... [2023-08-29 21:42:16,610 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:42:16" (1/1) ... [2023-08-29 21:42:16,630 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2023-08-29 21:42:16,630 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 21:42:16,631 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 21:42:16,631 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 21:42:16,631 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 21:42:16,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:42:16" (1/1) ... [2023-08-29 21:42:16,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:42:16" (1/1) ... [2023-08-29 21:42:16,646 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:42:16" (1/1) ... [2023-08-29 21:42:16,647 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:42:16" (1/1) ... [2023-08-29 21:42:16,654 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:42:16" (1/1) ... [2023-08-29 21:42:16,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:42:16" (1/1) ... [2023-08-29 21:42:16,662 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:42:16" (1/1) ... [2023-08-29 21:42:16,665 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:42:16" (1/1) ... [2023-08-29 21:42:16,667 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 21:42:16,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 21:42:16,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 21:42:16,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 21:42:16,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:42:16" (1/1) ... [2023-08-29 21:42:16,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:42:16,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:42:16,702 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 21:42:16,713 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 21:42:16,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 21:42:16,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 21:42:16,733 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 21:42:16,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 21:42:16,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 21:42:16,733 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-29 21:42:16,733 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-29 21:42:16,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 21:42:16,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 21:42:16,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 21:42:16,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 21:42:16,735 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 21:42:16,842 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 21:42:16,843 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 21:42:17,014 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 21:42:17,019 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 21:42:17,019 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-08-29 21:42:17,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:42:17 BoogieIcfgContainer [2023-08-29 21:42:17,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 21:42:17,022 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 21:42:17,022 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 21:42:17,024 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 21:42:17,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 09:42:16" (1/3) ... [2023-08-29 21:42:17,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24d58a1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:42:17, skipping insertion in model container [2023-08-29 21:42:17,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:42:16" (2/3) ... [2023-08-29 21:42:17,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24d58a1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:42:17, skipping insertion in model container [2023-08-29 21:42:17,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:42:17" (3/3) ... [2023-08-29 21:42:17,026 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_22-deref_read_racefree.i [2023-08-29 21:42:17,036 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 21:42:17,036 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-08-29 21:42:17,036 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 21:42:17,072 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 21:42:17,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 116 transitions, 237 flow [2023-08-29 21:42:17,135 INFO L130 PetriNetUnfolder]: 14/154 cut-off events. [2023-08-29 21:42:17,135 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:42:17,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 154 events. 14/154 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 432 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 83. Up to 4 conditions per place. [2023-08-29 21:42:17,140 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 116 transitions, 237 flow [2023-08-29 21:42:17,143 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 116 transitions, 237 flow [2023-08-29 21:42:17,145 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:42:17,159 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 116 transitions, 237 flow [2023-08-29 21:42:17,161 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 116 transitions, 237 flow [2023-08-29 21:42:17,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 116 transitions, 237 flow [2023-08-29 21:42:17,180 INFO L130 PetriNetUnfolder]: 14/154 cut-off events. [2023-08-29 21:42:17,181 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:42:17,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 154 events. 14/154 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 432 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 83. Up to 4 conditions per place. [2023-08-29 21:42:17,183 INFO L119 LiptonReduction]: Number of co-enabled transitions 3520 [2023-08-29 21:42:19,620 INFO L134 LiptonReduction]: Checked pairs total: 8210 [2023-08-29 21:42:19,620 INFO L136 LiptonReduction]: Total number of compositions: 98 [2023-08-29 21:42:19,631 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:42:19,634 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;@790c62ad, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:42:19,635 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-08-29 21:42:19,640 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 21:42:19,640 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:42:19,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:19,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:42:19,641 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 21:42:19,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:19,645 INFO L85 PathProgramCache]: Analyzing trace with hash 14180, now seen corresponding path program 1 times [2023-08-29 21:42:19,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:19,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768596033] [2023-08-29 21:42:19,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:19,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:19,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:19,857 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 21:42:19,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:19,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768596033] [2023-08-29 21:42:19,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768596033] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:42:19,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:42:19,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:42:19,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919898694] [2023-08-29 21:42:19,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:42:19,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:42:19,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:19,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:42:19,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:42:19,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 214 [2023-08-29 21:42:19,940 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 45 transitions, 95 flow. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:19,940 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:19,940 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 214 [2023-08-29 21:42:19,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:20,036 INFO L130 PetriNetUnfolder]: 156/395 cut-off events. [2023-08-29 21:42:20,036 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:42:20,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 395 events. 156/395 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1991 event pairs, 120 based on Foata normal form. 14/271 useless extension candidates. Maximal degree in co-relation 713. Up to 273 conditions per place. [2023-08-29 21:42:20,039 INFO L137 encePairwiseOnDemand]: 201/214 looper letters, 37 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-08-29 21:42:20,041 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 46 transitions, 175 flow [2023-08-29 21:42:20,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:42:20,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:42:20,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 352 transitions. [2023-08-29 21:42:20,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5482866043613707 [2023-08-29 21:42:20,050 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 352 transitions. [2023-08-29 21:42:20,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 352 transitions. [2023-08-29 21:42:20,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:20,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 352 transitions. [2023-08-29 21:42:20,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:20,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:20,059 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:20,060 INFO L175 Difference]: Start difference. First operand has 40 places, 45 transitions, 95 flow. Second operand 3 states and 352 transitions. [2023-08-29 21:42:20,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 46 transitions, 175 flow [2023-08-29 21:42:20,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 46 transitions, 175 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:42:20,063 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 77 flow [2023-08-29 21:42:20,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2023-08-29 21:42:20,066 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -1 predicate places. [2023-08-29 21:42:20,067 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 77 flow [2023-08-29 21:42:20,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:20,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:20,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:42:20,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 21:42:20,067 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 21:42:20,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:20,068 INFO L85 PathProgramCache]: Analyzing trace with hash 14179, now seen corresponding path program 1 times [2023-08-29 21:42:20,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:20,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942872301] [2023-08-29 21:42:20,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:20,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:20,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:20,161 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 21:42:20,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:20,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942872301] [2023-08-29 21:42:20,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942872301] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:42:20,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:42:20,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:42:20,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871152211] [2023-08-29 21:42:20,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:42:20,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:42:20,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:20,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:42:20,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:42:20,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 214 [2023-08-29 21:42:20,203 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:20,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:20,204 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 214 [2023-08-29 21:42:20,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:20,268 INFO L130 PetriNetUnfolder]: 156/387 cut-off events. [2023-08-29 21:42:20,268 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-29 21:42:20,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 749 conditions, 387 events. 156/387 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1859 event pairs, 132 based on Foata normal form. 0/254 useless extension candidates. Maximal degree in co-relation 732. Up to 326 conditions per place. [2023-08-29 21:42:20,273 INFO L137 encePairwiseOnDemand]: 210/214 looper letters, 38 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-29 21:42:20,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 47 transitions, 183 flow [2023-08-29 21:42:20,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:42:20,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:42:20,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 339 transitions. [2023-08-29 21:42:20,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5280373831775701 [2023-08-29 21:42:20,277 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 339 transitions. [2023-08-29 21:42:20,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 339 transitions. [2023-08-29 21:42:20,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:20,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 339 transitions. [2023-08-29 21:42:20,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:20,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:20,282 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:20,282 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 77 flow. Second operand 3 states and 339 transitions. [2023-08-29 21:42:20,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 47 transitions, 183 flow [2023-08-29 21:42:20,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 47 transitions, 179 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:42:20,284 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 83 flow [2023-08-29 21:42:20,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2023-08-29 21:42:20,285 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 0 predicate places. [2023-08-29 21:42:20,285 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 83 flow [2023-08-29 21:42:20,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:20,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:20,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 21:42:20,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 21:42:20,286 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 21:42:20,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:20,289 INFO L85 PathProgramCache]: Analyzing trace with hash 422782724, now seen corresponding path program 1 times [2023-08-29 21:42:20,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:20,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840614818] [2023-08-29 21:42:20,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:20,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:20,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:20,396 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 21:42:20,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:20,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840614818] [2023-08-29 21:42:20,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840614818] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:42:20,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291259467] [2023-08-29 21:42:20,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:20,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:42:20,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:42:20,400 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 21:42:20,408 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 21:42:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:20,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:42:20,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:42:20,534 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 21:42:20,569 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 21:42:20,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:42:20,597 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 21:42:20,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291259467] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:42:20,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:42:20,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-29 21:42:20,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786690223] [2023-08-29 21:42:20,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:42:20,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:42:20,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:20,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:42:20,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:42:20,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 214 [2023-08-29 21:42:20,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 83 flow. Second operand has 7 states, 7 states have (on average 97.71428571428571) internal successors, (684), 7 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:20,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:20,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 214 [2023-08-29 21:42:20,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:20,773 INFO L130 PetriNetUnfolder]: 24/80 cut-off events. [2023-08-29 21:42:20,773 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-29 21:42:20,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 80 events. 24/80 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 214 event pairs, 11 based on Foata normal form. 13/81 useless extension candidates. Maximal degree in co-relation 163. Up to 50 conditions per place. [2023-08-29 21:42:20,774 INFO L137 encePairwiseOnDemand]: 210/214 looper letters, 21 selfloop transitions, 2 changer transitions 6/35 dead transitions. [2023-08-29 21:42:20,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 139 flow [2023-08-29 21:42:20,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:42:20,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:42:20,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 415 transitions. [2023-08-29 21:42:20,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4848130841121495 [2023-08-29 21:42:20,775 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 415 transitions. [2023-08-29 21:42:20,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 415 transitions. [2023-08-29 21:42:20,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:20,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 415 transitions. [2023-08-29 21:42:20,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:20,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 214.0) internal successors, (1070), 5 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:20,778 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 214.0) internal successors, (1070), 5 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:20,778 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 83 flow. Second operand 4 states and 415 transitions. [2023-08-29 21:42:20,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 139 flow [2023-08-29 21:42:20,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 35 transitions, 133 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:42:20,779 INFO L231 Difference]: Finished difference. Result has 28 places, 19 transitions, 47 flow [2023-08-29 21:42:20,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=47, PETRI_PLACES=28, PETRI_TRANSITIONS=19} [2023-08-29 21:42:20,779 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -12 predicate places. [2023-08-29 21:42:20,779 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 19 transitions, 47 flow [2023-08-29 21:42:20,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 97.71428571428571) internal successors, (684), 7 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:20,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:20,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:42:20,787 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 21:42:20,984 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 21:42:20,987 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 21:42:20,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:20,987 INFO L85 PathProgramCache]: Analyzing trace with hash 221351048, now seen corresponding path program 1 times [2023-08-29 21:42:20,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:20,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896896015] [2023-08-29 21:42:20,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:20,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:21,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:21,117 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 21:42:21,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:21,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896896015] [2023-08-29 21:42:21,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896896015] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:42:21,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:42:21,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:42:21,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917622239] [2023-08-29 21:42:21,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:42:21,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:42:21,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:21,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:42:21,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:42:21,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 214 [2023-08-29 21:42:21,166 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 19 transitions, 47 flow. Second operand has 4 states, 4 states have (on average 97.25) internal successors, (389), 4 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:21,166 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:21,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 214 [2023-08-29 21:42:21,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:21,180 INFO L130 PetriNetUnfolder]: 14/54 cut-off events. [2023-08-29 21:42:21,183 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 21:42:21,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 54 events. 14/54 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 122 event pairs, 14 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 93. Up to 40 conditions per place. [2023-08-29 21:42:21,184 INFO L137 encePairwiseOnDemand]: 211/214 looper letters, 10 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-08-29 21:42:21,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 17 transitions, 65 flow [2023-08-29 21:42:21,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:42:21,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:42:21,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 301 transitions. [2023-08-29 21:42:21,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4688473520249221 [2023-08-29 21:42:21,186 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 301 transitions. [2023-08-29 21:42:21,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 301 transitions. [2023-08-29 21:42:21,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:21,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 301 transitions. [2023-08-29 21:42:21,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:21,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:21,188 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:21,188 INFO L175 Difference]: Start difference. First operand has 28 places, 19 transitions, 47 flow. Second operand 3 states and 301 transitions. [2023-08-29 21:42:21,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 17 transitions, 65 flow [2023-08-29 21:42:21,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 17 transitions, 62 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:42:21,189 INFO L231 Difference]: Finished difference. Result has 23 places, 17 transitions, 42 flow [2023-08-29 21:42:21,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=42, PETRI_PLACES=23, PETRI_TRANSITIONS=17} [2023-08-29 21:42:21,190 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -17 predicate places. [2023-08-29 21:42:21,191 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 17 transitions, 42 flow [2023-08-29 21:42:21,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 97.25) internal successors, (389), 4 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:21,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:21,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:42:21,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 21:42:21,192 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 21:42:21,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:21,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1728052959, now seen corresponding path program 1 times [2023-08-29 21:42:21,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:21,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420760380] [2023-08-29 21:42:21,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:21,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:21,254 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 21:42:21,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:21,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420760380] [2023-08-29 21:42:21,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420760380] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:42:21,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:42:21,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:42:21,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788715023] [2023-08-29 21:42:21,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:42:21,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:42:21,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:21,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:42:21,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:42:21,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 214 [2023-08-29 21:42:21,306 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 17 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:21,306 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:21,306 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 214 [2023-08-29 21:42:21,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:21,332 INFO L130 PetriNetUnfolder]: 14/44 cut-off events. [2023-08-29 21:42:21,332 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:42:21,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 44 events. 14/44 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 77 event pairs, 14 based on Foata normal form. 3/46 useless extension candidates. Maximal degree in co-relation 95. Up to 40 conditions per place. [2023-08-29 21:42:21,332 INFO L137 encePairwiseOnDemand]: 209/214 looper letters, 0 selfloop transitions, 0 changer transitions 13/13 dead transitions. [2023-08-29 21:42:21,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 13 transitions, 56 flow [2023-08-29 21:42:21,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:42:21,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:42:21,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 282 transitions. [2023-08-29 21:42:21,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392523364485981 [2023-08-29 21:42:21,334 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 282 transitions. [2023-08-29 21:42:21,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 282 transitions. [2023-08-29 21:42:21,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:21,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 282 transitions. [2023-08-29 21:42:21,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:21,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:21,336 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:21,336 INFO L175 Difference]: Start difference. First operand has 23 places, 17 transitions, 42 flow. Second operand 3 states and 282 transitions. [2023-08-29 21:42:21,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 13 transitions, 56 flow [2023-08-29 21:42:21,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 13 transitions, 55 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:42:21,337 INFO L231 Difference]: Finished difference. Result has 20 places, 0 transitions, 0 flow [2023-08-29 21:42:21,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=20, PETRI_TRANSITIONS=0} [2023-08-29 21:42:21,339 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -20 predicate places. [2023-08-29 21:42:21,339 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 0 transitions, 0 flow [2023-08-29 21:42:21,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:21,341 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (21 of 22 remaining) [2023-08-29 21:42:21,344 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 22 remaining) [2023-08-29 21:42:21,345 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 22 remaining) [2023-08-29 21:42:21,345 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 22 remaining) [2023-08-29 21:42:21,345 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 22 remaining) [2023-08-29 21:42:21,345 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 22 remaining) [2023-08-29 21:42:21,345 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 22 remaining) [2023-08-29 21:42:21,345 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 22 remaining) [2023-08-29 21:42:21,345 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 22 remaining) [2023-08-29 21:42:21,347 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 22 remaining) [2023-08-29 21:42:21,347 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 22 remaining) [2023-08-29 21:42:21,347 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (10 of 22 remaining) [2023-08-29 21:42:21,348 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 22 remaining) [2023-08-29 21:42:21,348 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 22 remaining) [2023-08-29 21:42:21,348 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 22 remaining) [2023-08-29 21:42:21,348 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 22 remaining) [2023-08-29 21:42:21,348 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 22 remaining) [2023-08-29 21:42:21,348 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 22 remaining) [2023-08-29 21:42:21,348 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 22 remaining) [2023-08-29 21:42:21,348 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 22 remaining) [2023-08-29 21:42:21,348 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 22 remaining) [2023-08-29 21:42:21,348 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 22 remaining) [2023-08-29 21:42:21,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 21:42:21,349 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-29 21:42:21,350 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:42:21,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 116 transitions, 237 flow [2023-08-29 21:42:21,368 INFO L130 PetriNetUnfolder]: 14/154 cut-off events. [2023-08-29 21:42:21,368 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:42:21,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 154 events. 14/154 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 432 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 83. Up to 4 conditions per place. [2023-08-29 21:42:21,369 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 116 transitions, 237 flow [2023-08-29 21:42:21,370 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 116 transitions, 237 flow [2023-08-29 21:42:21,370 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:42:21,370 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 116 transitions, 237 flow [2023-08-29 21:42:21,370 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 116 transitions, 237 flow [2023-08-29 21:42:21,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 116 transitions, 237 flow [2023-08-29 21:42:21,380 INFO L130 PetriNetUnfolder]: 14/154 cut-off events. [2023-08-29 21:42:21,380 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:42:21,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 154 events. 14/154 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 432 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 83. Up to 4 conditions per place. [2023-08-29 21:42:21,382 INFO L119 LiptonReduction]: Number of co-enabled transitions 3520 [2023-08-29 21:42:23,573 INFO L134 LiptonReduction]: Checked pairs total: 9067 [2023-08-29 21:42:23,573 INFO L136 LiptonReduction]: Total number of compositions: 98 [2023-08-29 21:42:23,575 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:42:23,575 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;@790c62ad, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:42:23,575 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:42:23,578 INFO L130 PetriNetUnfolder]: 2/34 cut-off events. [2023-08-29 21:42:23,578 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:42:23,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:23,578 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-29 21:42:23,578 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:42:23,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:23,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1175501070, now seen corresponding path program 1 times [2023-08-29 21:42:23,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:23,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326739984] [2023-08-29 21:42:23,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:23,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:42:23,590 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:42:23,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:42:23,603 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:42:23,603 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:42:23,603 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:42:23,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 21:42:23,604 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:42:23,604 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:42:23,605 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:42:23,605 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-29 21:42:23,616 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 21:42:23,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 157 transitions, 326 flow [2023-08-29 21:42:23,633 INFO L130 PetriNetUnfolder]: 24/238 cut-off events. [2023-08-29 21:42:23,634 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 21:42:23,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 238 events. 24/238 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 808 event pairs, 0 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 155. Up to 6 conditions per place. [2023-08-29 21:42:23,635 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 157 transitions, 326 flow [2023-08-29 21:42:23,636 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 146 places, 157 transitions, 326 flow [2023-08-29 21:42:23,636 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:42:23,636 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 146 places, 157 transitions, 326 flow [2023-08-29 21:42:23,636 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 146 places, 157 transitions, 326 flow [2023-08-29 21:42:23,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 157 transitions, 326 flow [2023-08-29 21:42:23,648 INFO L130 PetriNetUnfolder]: 24/238 cut-off events. [2023-08-29 21:42:23,648 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 21:42:23,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 238 events. 24/238 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 808 event pairs, 0 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 155. Up to 6 conditions per place. [2023-08-29 21:42:23,653 INFO L119 LiptonReduction]: Number of co-enabled transitions 10320 [2023-08-29 21:42:26,133 INFO L134 LiptonReduction]: Checked pairs total: 27377 [2023-08-29 21:42:26,133 INFO L136 LiptonReduction]: Total number of compositions: 131 [2023-08-29 21:42:26,134 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:42:26,135 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;@790c62ad, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:42:26,135 INFO L358 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2023-08-29 21:42:26,136 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-29 21:42:26,136 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:42:26,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:26,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:42:26,136 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-08-29 21:42:26,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:26,137 INFO L85 PathProgramCache]: Analyzing trace with hash 27841, now seen corresponding path program 1 times [2023-08-29 21:42:26,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:26,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774263589] [2023-08-29 21:42:26,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:26,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:26,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:26,164 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 21:42:26,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:26,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774263589] [2023-08-29 21:42:26,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774263589] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:42:26,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:42:26,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:42:26,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339110249] [2023-08-29 21:42:26,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:42:26,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:42:26,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:26,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:42:26,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:42:26,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 288 [2023-08-29 21:42:26,198 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 72 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:26,198 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:26,198 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 288 [2023-08-29 21:42:26,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:26,702 INFO L130 PetriNetUnfolder]: 5083/8529 cut-off events. [2023-08-29 21:42:26,702 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2023-08-29 21:42:26,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16623 conditions, 8529 events. 5083/8529 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 60070 event pairs, 3952 based on Foata normal form. 406/6142 useless extension candidates. Maximal degree in co-relation 11063. Up to 6272 conditions per place. [2023-08-29 21:42:26,733 INFO L137 encePairwiseOnDemand]: 267/288 looper letters, 66 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2023-08-29 21:42:26,734 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 79 transitions, 306 flow [2023-08-29 21:42:26,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:42:26,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:42:26,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 499 transitions. [2023-08-29 21:42:26,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5775462962962963 [2023-08-29 21:42:26,735 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 499 transitions. [2023-08-29 21:42:26,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 499 transitions. [2023-08-29 21:42:26,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:26,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 499 transitions. [2023-08-29 21:42:26,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:26,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:26,740 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:26,740 INFO L175 Difference]: Start difference. First operand has 63 places, 72 transitions, 156 flow. Second operand 3 states and 499 transitions. [2023-08-29 21:42:26,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 79 transitions, 306 flow [2023-08-29 21:42:26,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 79 transitions, 304 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-29 21:42:26,743 INFO L231 Difference]: Finished difference. Result has 60 places, 53 transitions, 120 flow [2023-08-29 21:42:26,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=60, PETRI_TRANSITIONS=53} [2023-08-29 21:42:26,744 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -3 predicate places. [2023-08-29 21:42:26,744 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 53 transitions, 120 flow [2023-08-29 21:42:26,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:26,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:26,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:42:26,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 21:42:26,745 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-08-29 21:42:26,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:26,745 INFO L85 PathProgramCache]: Analyzing trace with hash 27839, now seen corresponding path program 1 times [2023-08-29 21:42:26,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:26,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386300304] [2023-08-29 21:42:26,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:26,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:26,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:26,778 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 21:42:26,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:26,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386300304] [2023-08-29 21:42:26,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386300304] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:42:26,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:42:26,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:42:26,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36276021] [2023-08-29 21:42:26,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:42:26,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:42:26,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:26,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:42:26,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:42:26,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 288 [2023-08-29 21:42:26,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 53 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:26,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:26,815 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 288 [2023-08-29 21:42:26,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:27,306 INFO L130 PetriNetUnfolder]: 5083/8559 cut-off events. [2023-08-29 21:42:27,307 INFO L131 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2023-08-29 21:42:27,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16849 conditions, 8559 events. 5083/8559 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 60245 event pairs, 4654 based on Foata normal form. 0/5777 useless extension candidates. Maximal degree in co-relation 13048. Up to 8010 conditions per place. [2023-08-29 21:42:27,341 INFO L137 encePairwiseOnDemand]: 284/288 looper letters, 55 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2023-08-29 21:42:27,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 68 transitions, 264 flow [2023-08-29 21:42:27,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:42:27,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:42:27,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 458 transitions. [2023-08-29 21:42:27,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5300925925925926 [2023-08-29 21:42:27,344 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 458 transitions. [2023-08-29 21:42:27,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 458 transitions. [2023-08-29 21:42:27,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:27,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 458 transitions. [2023-08-29 21:42:27,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:27,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:27,347 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:27,347 INFO L175 Difference]: Start difference. First operand has 60 places, 53 transitions, 120 flow. Second operand 3 states and 458 transitions. [2023-08-29 21:42:27,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 68 transitions, 264 flow [2023-08-29 21:42:27,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 68 transitions, 260 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:42:27,351 INFO L231 Difference]: Finished difference. Result has 61 places, 54 transitions, 130 flow [2023-08-29 21:42:27,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=61, PETRI_TRANSITIONS=54} [2023-08-29 21:42:27,352 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -2 predicate places. [2023-08-29 21:42:27,352 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 54 transitions, 130 flow [2023-08-29 21:42:27,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:27,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:27,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:42:27,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 21:42:27,353 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-08-29 21:42:27,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:27,353 INFO L85 PathProgramCache]: Analyzing trace with hash -37275198, now seen corresponding path program 1 times [2023-08-29 21:42:27,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:27,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969668138] [2023-08-29 21:42:27,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:27,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:27,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:27,402 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 21:42:27,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:27,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969668138] [2023-08-29 21:42:27,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969668138] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:42:27,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015688888] [2023-08-29 21:42:27,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:27,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:42:27,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:42:27,404 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 21:42:27,407 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 21:42:27,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:27,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:42:27,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:42:27,470 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 21:42:27,497 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 21:42:27,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:42:27,522 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 21:42:27,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015688888] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:42:27,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:42:27,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-29 21:42:27,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319761999] [2023-08-29 21:42:27,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:42:27,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:42:27,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:27,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:42:27,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:42:27,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 288 [2023-08-29 21:42:27,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 130 flow. Second operand has 7 states, 7 states have (on average 131.71428571428572) internal successors, (922), 7 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:27,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:27,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 288 [2023-08-29 21:42:27,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:28,146 INFO L130 PetriNetUnfolder]: 4576/7612 cut-off events. [2023-08-29 21:42:28,147 INFO L131 PetriNetUnfolder]: For 253/253 co-relation queries the response was YES. [2023-08-29 21:42:28,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15447 conditions, 7612 events. 4576/7612 cut-off events. For 253/253 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 55524 event pairs, 165 based on Foata normal form. 14/5551 useless extension candidates. Maximal degree in co-relation 13467. Up to 5600 conditions per place. [2023-08-29 21:42:28,176 INFO L137 encePairwiseOnDemand]: 282/288 looper letters, 104 selfloop transitions, 5 changer transitions 0/120 dead transitions. [2023-08-29 21:42:28,177 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 120 transitions, 478 flow [2023-08-29 21:42:28,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:42:28,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:42:28,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 762 transitions. [2023-08-29 21:42:28,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2023-08-29 21:42:28,179 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 762 transitions. [2023-08-29 21:42:28,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 762 transitions. [2023-08-29 21:42:28,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:28,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 762 transitions. [2023-08-29 21:42:28,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 152.4) internal successors, (762), 5 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:28,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 288.0) internal successors, (1728), 6 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:28,183 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 288.0) internal successors, (1728), 6 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:28,183 INFO L175 Difference]: Start difference. First operand has 61 places, 54 transitions, 130 flow. Second operand 5 states and 762 transitions. [2023-08-29 21:42:28,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 120 transitions, 478 flow [2023-08-29 21:42:28,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 120 transitions, 476 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:42:28,187 INFO L231 Difference]: Finished difference. Result has 64 places, 53 transitions, 138 flow [2023-08-29 21:42:28,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=138, PETRI_PLACES=64, PETRI_TRANSITIONS=53} [2023-08-29 21:42:28,188 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 1 predicate places. [2023-08-29 21:42:28,189 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 53 transitions, 138 flow [2023-08-29 21:42:28,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 131.71428571428572) internal successors, (922), 7 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:28,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:28,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:42:28,199 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 21:42:28,393 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,SelfDestructingSolverStorable8 [2023-08-29 21:42:28,393 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-08-29 21:42:28,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:28,394 INFO L85 PathProgramCache]: Analyzing trace with hash -37073903, now seen corresponding path program 1 times [2023-08-29 21:42:28,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:28,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321369532] [2023-08-29 21:42:28,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:28,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:28,466 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 21:42:28,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:28,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321369532] [2023-08-29 21:42:28,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321369532] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:42:28,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:42:28,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:42:28,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681098244] [2023-08-29 21:42:28,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:42:28,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:42:28,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:28,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:42:28,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:42:28,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 288 [2023-08-29 21:42:28,533 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 53 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 127.25) internal successors, (509), 4 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:28,533 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:28,534 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 288 [2023-08-29 21:42:28,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:28,827 INFO L130 PetriNetUnfolder]: 3322/5504 cut-off events. [2023-08-29 21:42:28,828 INFO L131 PetriNetUnfolder]: For 1052/1052 co-relation queries the response was YES. [2023-08-29 21:42:28,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11819 conditions, 5504 events. 3322/5504 cut-off events. For 1052/1052 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 35562 event pairs, 2794 based on Foata normal form. 315/4402 useless extension candidates. Maximal degree in co-relation 8597. Up to 4416 conditions per place. [2023-08-29 21:42:28,847 INFO L137 encePairwiseOnDemand]: 281/288 looper letters, 57 selfloop transitions, 3 changer transitions 0/71 dead transitions. [2023-08-29 21:42:28,847 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 71 transitions, 294 flow [2023-08-29 21:42:28,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:42:28,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:42:28,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 571 transitions. [2023-08-29 21:42:28,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4956597222222222 [2023-08-29 21:42:28,849 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 571 transitions. [2023-08-29 21:42:28,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 571 transitions. [2023-08-29 21:42:28,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:28,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 571 transitions. [2023-08-29 21:42:28,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 142.75) internal successors, (571), 4 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:28,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 288.0) internal successors, (1440), 5 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:28,852 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 288.0) internal successors, (1440), 5 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:28,852 INFO L175 Difference]: Start difference. First operand has 64 places, 53 transitions, 138 flow. Second operand 4 states and 571 transitions. [2023-08-29 21:42:28,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 71 transitions, 294 flow [2023-08-29 21:42:28,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 71 transitions, 284 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-29 21:42:28,856 INFO L231 Difference]: Finished difference. Result has 60 places, 49 transitions, 126 flow [2023-08-29 21:42:28,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=126, PETRI_PLACES=60, PETRI_TRANSITIONS=49} [2023-08-29 21:42:28,857 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -3 predicate places. [2023-08-29 21:42:28,857 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 49 transitions, 126 flow [2023-08-29 21:42:28,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.25) internal successors, (509), 4 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:28,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:28,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:42:28,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 21:42:28,858 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-08-29 21:42:28,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:28,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1149294991, now seen corresponding path program 1 times [2023-08-29 21:42:28,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:28,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376458899] [2023-08-29 21:42:28,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:28,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:28,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:28,913 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 21:42:28,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:28,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376458899] [2023-08-29 21:42:28,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376458899] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:42:28,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:42:28,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:42:28,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165849356] [2023-08-29 21:42:28,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:42:28,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:42:28,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:28,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:42:28,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:42:28,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 288 [2023-08-29 21:42:28,972 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 49 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 116.25) internal successors, (465), 4 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:28,972 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:28,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 288 [2023-08-29 21:42:28,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:29,297 INFO L130 PetriNetUnfolder]: 3230/5487 cut-off events. [2023-08-29 21:42:29,298 INFO L131 PetriNetUnfolder]: For 699/699 co-relation queries the response was YES. [2023-08-29 21:42:29,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11863 conditions, 5487 events. 3230/5487 cut-off events. For 699/699 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 33757 event pairs, 1968 based on Foata normal form. 0/4474 useless extension candidates. Maximal degree in co-relation 9246. Up to 2760 conditions per place. [2023-08-29 21:42:29,312 INFO L137 encePairwiseOnDemand]: 270/288 looper letters, 70 selfloop transitions, 10 changer transitions 1/87 dead transitions. [2023-08-29 21:42:29,313 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 87 transitions, 366 flow [2023-08-29 21:42:29,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:42:29,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:42:29,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 555 transitions. [2023-08-29 21:42:29,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817708333333333 [2023-08-29 21:42:29,315 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 555 transitions. [2023-08-29 21:42:29,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 555 transitions. [2023-08-29 21:42:29,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:29,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 555 transitions. [2023-08-29 21:42:29,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 138.75) internal successors, (555), 4 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:29,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 288.0) internal successors, (1440), 5 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:29,318 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 288.0) internal successors, (1440), 5 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:29,318 INFO L175 Difference]: Start difference. First operand has 60 places, 49 transitions, 126 flow. Second operand 4 states and 555 transitions. [2023-08-29 21:42:29,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 87 transitions, 366 flow [2023-08-29 21:42:29,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 87 transitions, 360 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:42:29,331 INFO L231 Difference]: Finished difference. Result has 64 places, 56 transitions, 222 flow [2023-08-29 21:42:29,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=222, PETRI_PLACES=64, PETRI_TRANSITIONS=56} [2023-08-29 21:42:29,332 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 1 predicate places. [2023-08-29 21:42:29,332 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 56 transitions, 222 flow [2023-08-29 21:42:29,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 116.25) internal successors, (465), 4 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:29,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:29,333 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2023-08-29 21:42:29,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 21:42:29,333 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-08-29 21:42:29,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:29,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1069414408, now seen corresponding path program 1 times [2023-08-29 21:42:29,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:29,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959726594] [2023-08-29 21:42:29,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:29,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:29,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:29,367 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 21:42:29,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:29,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959726594] [2023-08-29 21:42:29,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959726594] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:42:29,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808507294] [2023-08-29 21:42:29,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:29,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:42:29,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:42:29,369 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 21:42:29,371 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 21:42:29,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:29,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 21:42:29,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:42:29,435 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 21:42:29,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:42:29,453 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 21:42:29,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808507294] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:42:29,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:42:29,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-08-29 21:42:29,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972834981] [2023-08-29 21:42:29,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:42:29,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 21:42:29,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:29,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 21:42:29,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-08-29 21:42:29,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 288 [2023-08-29 21:42:29,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 56 transitions, 222 flow. Second operand has 9 states, 9 states have (on average 135.33333333333334) internal successors, (1218), 9 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:29,475 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:29,475 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 288 [2023-08-29 21:42:29,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:29,555 INFO L130 PetriNetUnfolder]: 455/816 cut-off events. [2023-08-29 21:42:29,556 INFO L131 PetriNetUnfolder]: For 349/369 co-relation queries the response was YES. [2023-08-29 21:42:29,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1997 conditions, 816 events. 455/816 cut-off events. For 349/369 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3787 event pairs, 8 based on Foata normal form. 98/906 useless extension candidates. Maximal degree in co-relation 1988. Up to 548 conditions per place. [2023-08-29 21:42:29,557 INFO L137 encePairwiseOnDemand]: 285/288 looper letters, 0 selfloop transitions, 0 changer transitions 57/57 dead transitions. [2023-08-29 21:42:29,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 274 flow [2023-08-29 21:42:29,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:42:29,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:42:29,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 717 transitions. [2023-08-29 21:42:29,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4979166666666667 [2023-08-29 21:42:29,559 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 717 transitions. [2023-08-29 21:42:29,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 717 transitions. [2023-08-29 21:42:29,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:29,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 717 transitions. [2023-08-29 21:42:29,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 143.4) internal successors, (717), 5 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:29,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 288.0) internal successors, (1728), 6 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:29,563 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 288.0) internal successors, (1728), 6 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:29,563 INFO L175 Difference]: Start difference. First operand has 64 places, 56 transitions, 222 flow. Second operand 5 states and 717 transitions. [2023-08-29 21:42:29,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 274 flow [2023-08-29 21:42:29,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 57 transitions, 268 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 21:42:29,564 INFO L231 Difference]: Finished difference. Result has 42 places, 0 transitions, 0 flow [2023-08-29 21:42:29,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=42, PETRI_TRANSITIONS=0} [2023-08-29 21:42:29,564 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -21 predicate places. [2023-08-29 21:42:29,565 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 0 transitions, 0 flow [2023-08-29 21:42:29,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 135.33333333333334) internal successors, (1218), 9 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:29,565 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (29 of 30 remaining) [2023-08-29 21:42:29,566 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 30 remaining) [2023-08-29 21:42:29,566 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 30 remaining) [2023-08-29 21:42:29,566 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 30 remaining) [2023-08-29 21:42:29,566 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 30 remaining) [2023-08-29 21:42:29,566 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 30 remaining) [2023-08-29 21:42:29,566 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 30 remaining) [2023-08-29 21:42:29,567 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 30 remaining) [2023-08-29 21:42:29,567 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 30 remaining) [2023-08-29 21:42:29,567 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 30 remaining) [2023-08-29 21:42:29,567 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 30 remaining) [2023-08-29 21:42:29,567 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 30 remaining) [2023-08-29 21:42:29,567 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 30 remaining) [2023-08-29 21:42:29,567 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 30 remaining) [2023-08-29 21:42:29,567 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 30 remaining) [2023-08-29 21:42:29,568 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 30 remaining) [2023-08-29 21:42:29,568 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 30 remaining) [2023-08-29 21:42:29,568 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 30 remaining) [2023-08-29 21:42:29,568 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 30 remaining) [2023-08-29 21:42:29,568 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 30 remaining) [2023-08-29 21:42:29,568 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 30 remaining) [2023-08-29 21:42:29,568 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 30 remaining) [2023-08-29 21:42:29,568 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 30 remaining) [2023-08-29 21:42:29,568 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 30 remaining) [2023-08-29 21:42:29,569 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 30 remaining) [2023-08-29 21:42:29,569 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 30 remaining) [2023-08-29 21:42:29,569 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (3 of 30 remaining) [2023-08-29 21:42:29,569 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 30 remaining) [2023-08-29 21:42:29,569 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 30 remaining) [2023-08-29 21:42:29,569 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 30 remaining) [2023-08-29 21:42:29,573 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 21:42:29,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:42:29,774 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-29 21:42:29,774 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:42:29,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 157 transitions, 326 flow [2023-08-29 21:42:29,786 INFO L130 PetriNetUnfolder]: 24/238 cut-off events. [2023-08-29 21:42:29,786 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 21:42:29,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 238 events. 24/238 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 808 event pairs, 0 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 155. Up to 6 conditions per place. [2023-08-29 21:42:29,787 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 157 transitions, 326 flow [2023-08-29 21:42:29,788 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 146 places, 157 transitions, 326 flow [2023-08-29 21:42:29,788 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:42:29,788 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 146 places, 157 transitions, 326 flow [2023-08-29 21:42:29,788 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 146 places, 157 transitions, 326 flow [2023-08-29 21:42:29,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 157 transitions, 326 flow [2023-08-29 21:42:29,799 INFO L130 PetriNetUnfolder]: 24/238 cut-off events. [2023-08-29 21:42:29,799 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 21:42:29,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 238 events. 24/238 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 808 event pairs, 0 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 155. Up to 6 conditions per place. [2023-08-29 21:42:29,803 INFO L119 LiptonReduction]: Number of co-enabled transitions 10320 [2023-08-29 21:42:32,248 INFO L134 LiptonReduction]: Checked pairs total: 27761 [2023-08-29 21:42:32,248 INFO L136 LiptonReduction]: Total number of compositions: 131 [2023-08-29 21:42:32,249 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:42:32,249 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;@790c62ad, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:42:32,250 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:42:32,253 INFO L130 PetriNetUnfolder]: 10/79 cut-off events. [2023-08-29 21:42:32,253 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 21:42:32,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:32,253 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-29 21:42:32,253 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:42:32,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:32,254 INFO L85 PathProgramCache]: Analyzing trace with hash 111352626, now seen corresponding path program 1 times [2023-08-29 21:42:32,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:32,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894991079] [2023-08-29 21:42:32,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:32,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:32,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:42:32,262 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:42:32,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:42:32,269 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:42:32,269 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:42:32,269 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:42:32,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-29 21:42:32,269 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:42:32,270 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:42:32,270 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:42:32,270 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-29 21:42:32,281 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 21:42:32,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 198 transitions, 417 flow [2023-08-29 21:42:32,301 INFO L130 PetriNetUnfolder]: 34/322 cut-off events. [2023-08-29 21:42:32,301 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 21:42:32,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 322 events. 34/322 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1168 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 242. Up to 8 conditions per place. [2023-08-29 21:42:32,303 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 198 transitions, 417 flow [2023-08-29 21:42:32,304 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 198 transitions, 417 flow [2023-08-29 21:42:32,305 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:42:32,305 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 183 places, 198 transitions, 417 flow [2023-08-29 21:42:32,305 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 183 places, 198 transitions, 417 flow [2023-08-29 21:42:32,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 198 transitions, 417 flow [2023-08-29 21:42:32,321 INFO L130 PetriNetUnfolder]: 34/322 cut-off events. [2023-08-29 21:42:32,321 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 21:42:32,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 322 events. 34/322 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1168 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 242. Up to 8 conditions per place. [2023-08-29 21:42:32,331 INFO L119 LiptonReduction]: Number of co-enabled transitions 20400 [2023-08-29 21:42:35,016 INFO L134 LiptonReduction]: Checked pairs total: 57531 [2023-08-29 21:42:35,016 INFO L136 LiptonReduction]: Total number of compositions: 162 [2023-08-29 21:42:35,017 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:42:35,017 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;@790c62ad, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:42:35,018 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2023-08-29 21:42:35,018 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-29 21:42:35,018 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:42:35,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:35,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:42:35,019 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 21:42:35,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:35,019 INFO L85 PathProgramCache]: Analyzing trace with hash 44846, now seen corresponding path program 1 times [2023-08-29 21:42:35,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:35,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789376900] [2023-08-29 21:42:35,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:35,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:35,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:35,040 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 21:42:35,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:35,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789376900] [2023-08-29 21:42:35,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789376900] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:42:35,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:42:35,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:42:35,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333621823] [2023-08-29 21:42:35,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:42:35,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:42:35,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:35,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:42:35,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:42:35,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 360 [2023-08-29 21:42:35,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 98 transitions, 217 flow. Second operand has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:35,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:35,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 360 [2023-08-29 21:42:35,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:42,675 INFO L130 PetriNetUnfolder]: 109551/156337 cut-off events. [2023-08-29 21:42:42,675 INFO L131 PetriNetUnfolder]: For 1345/1345 co-relation queries the response was YES. [2023-08-29 21:42:42,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308234 conditions, 156337 events. 109551/156337 cut-off events. For 1345/1345 co-relation queries the response was YES. Maximal size of possible extension queue 4993. Compared 1235398 event pairs, 85488 based on Foata normal form. 8638/114328 useless extension candidates. Maximal degree in co-relation 44851. Up to 117992 conditions per place. [2023-08-29 21:42:43,389 INFO L137 encePairwiseOnDemand]: 331/360 looper letters, 93 selfloop transitions, 2 changer transitions 0/110 dead transitions. [2023-08-29 21:42:43,390 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 110 transitions, 431 flow [2023-08-29 21:42:43,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:42:43,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:42:43,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 644 transitions. [2023-08-29 21:42:43,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5962962962962963 [2023-08-29 21:42:43,392 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 644 transitions. [2023-08-29 21:42:43,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 644 transitions. [2023-08-29 21:42:43,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:43,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 644 transitions. [2023-08-29 21:42:43,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:43,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:43,395 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:43,395 INFO L175 Difference]: Start difference. First operand has 85 places, 98 transitions, 217 flow. Second operand 3 states and 644 transitions. [2023-08-29 21:42:43,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 110 transitions, 431 flow [2023-08-29 21:42:43,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 110 transitions, 425 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-29 21:42:43,400 INFO L231 Difference]: Finished difference. Result has 80 places, 71 transitions, 161 flow [2023-08-29 21:42:43,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=161, PETRI_PLACES=80, PETRI_TRANSITIONS=71} [2023-08-29 21:42:43,401 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, -5 predicate places. [2023-08-29 21:42:43,401 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 71 transitions, 161 flow [2023-08-29 21:42:43,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:43,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:43,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:42:43,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-29 21:42:43,402 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 21:42:43,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:43,402 INFO L85 PathProgramCache]: Analyzing trace with hash 44845, now seen corresponding path program 1 times [2023-08-29 21:42:43,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:43,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069960691] [2023-08-29 21:42:43,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:43,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:43,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:43,431 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 21:42:43,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:43,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069960691] [2023-08-29 21:42:43,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069960691] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:42:43,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:42:43,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:42:43,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572223564] [2023-08-29 21:42:43,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:42:43,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:42:43,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:43,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:42:43,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:42:43,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 360 [2023-08-29 21:42:43,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 71 transitions, 161 flow. Second operand has 3 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 21:42:43,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:43,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 360 [2023-08-29 21:42:43,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:51,215 INFO L130 PetriNetUnfolder]: 109551/157150 cut-off events. [2023-08-29 21:42:51,215 INFO L131 PetriNetUnfolder]: For 3564/3564 co-relation queries the response was YES. [2023-08-29 21:42:51,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311680 conditions, 157150 events. 109551/157150 cut-off events. For 3564/3564 co-relation queries the response was YES. Maximal size of possible extension queue 4939. Compared 1241188 event pairs, 103634 based on Foata normal form. 0/106099 useless extension candidates. Maximal degree in co-relation 241903. Up to 150894 conditions per place. [2023-08-29 21:42:51,900 INFO L137 encePairwiseOnDemand]: 356/360 looper letters, 69 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2023-08-29 21:42:51,901 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 86 transitions, 333 flow [2023-08-29 21:42:51,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:42:51,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:42:51,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 574 transitions. [2023-08-29 21:42:51,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5314814814814814 [2023-08-29 21:42:51,903 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 574 transitions. [2023-08-29 21:42:51,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 574 transitions. [2023-08-29 21:42:51,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:51,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 574 transitions. [2023-08-29 21:42:51,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.33333333333334) internal successors, (574), 3 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:51,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:51,905 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:51,905 INFO L175 Difference]: Start difference. First operand has 80 places, 71 transitions, 161 flow. Second operand 3 states and 574 transitions. [2023-08-29 21:42:51,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 86 transitions, 333 flow [2023-08-29 21:42:51,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 86 transitions, 329 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:42:51,934 INFO L231 Difference]: Finished difference. Result has 81 places, 72 transitions, 171 flow [2023-08-29 21:42:51,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=81, PETRI_TRANSITIONS=72} [2023-08-29 21:42:51,935 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, -4 predicate places. [2023-08-29 21:42:51,935 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 72 transitions, 171 flow [2023-08-29 21:42:51,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 21:42:51,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:51,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:42:51,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-29 21:42:51,936 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 21:42:51,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:51,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1498238670, now seen corresponding path program 1 times [2023-08-29 21:42:51,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:51,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827170627] [2023-08-29 21:42:51,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:51,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:51,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:51,973 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 21:42:51,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:51,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827170627] [2023-08-29 21:42:51,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827170627] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:42:51,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117147853] [2023-08-29 21:42:51,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:51,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:42:51,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:42:51,975 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 21:42:51,976 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 21:42:52,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:52,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:42:52,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:42:52,036 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 21:42:52,065 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 21:42:52,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:42:52,095 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 21:42:52,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117147853] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:42:52,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:42:52,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-29 21:42:52,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025240462] [2023-08-29 21:42:52,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:42:52,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 21:42:52,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:52,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 21:42:52,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:42:52,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 360 [2023-08-29 21:42:52,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 72 transitions, 171 flow. Second operand has 8 states, 8 states have (on average 164.875) internal successors, (1319), 8 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:52,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:52,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 360 [2023-08-29 21:42:52,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:54,376 INFO L130 PetriNetUnfolder]: 21320/33962 cut-off events. [2023-08-29 21:42:54,376 INFO L131 PetriNetUnfolder]: For 3193/3193 co-relation queries the response was YES. [2023-08-29 21:42:54,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70498 conditions, 33962 events. 21320/33962 cut-off events. For 3193/3193 co-relation queries the response was YES. Maximal size of possible extension queue 1279. Compared 273154 event pairs, 165 based on Foata normal form. 2954/29938 useless extension candidates. Maximal degree in co-relation 61421. Up to 20776 conditions per place. [2023-08-29 21:42:54,489 INFO L137 encePairwiseOnDemand]: 356/360 looper letters, 124 selfloop transitions, 4 changer transitions 0/142 dead transitions. [2023-08-29 21:42:54,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 142 transitions, 565 flow [2023-08-29 21:42:54,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:42:54,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:42:54,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1112 transitions. [2023-08-29 21:42:54,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148148148148148 [2023-08-29 21:42:54,492 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1112 transitions. [2023-08-29 21:42:54,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1112 transitions. [2023-08-29 21:42:54,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:54,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1112 transitions. [2023-08-29 21:42:54,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 185.33333333333334) internal successors, (1112), 6 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:54,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 360.0) internal successors, (2520), 7 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:54,496 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 360.0) internal successors, (2520), 7 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:54,496 INFO L175 Difference]: Start difference. First operand has 81 places, 72 transitions, 171 flow. Second operand 6 states and 1112 transitions. [2023-08-29 21:42:54,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 142 transitions, 565 flow [2023-08-29 21:42:54,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 142 transitions, 563 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:42:54,498 INFO L231 Difference]: Finished difference. Result has 73 places, 61 transitions, 153 flow [2023-08-29 21:42:54,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=153, PETRI_PLACES=73, PETRI_TRANSITIONS=61} [2023-08-29 21:42:54,498 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, -12 predicate places. [2023-08-29 21:42:54,498 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 61 transitions, 153 flow [2023-08-29 21:42:54,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 164.875) internal successors, (1319), 8 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:54,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:54,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:42:54,503 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 21:42:54,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-29 21:42:54,703 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 21:42:54,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:54,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1497975674, now seen corresponding path program 1 times [2023-08-29 21:42:54,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:54,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75070285] [2023-08-29 21:42:54,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:54,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:54,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:54,759 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 21:42:54,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:54,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75070285] [2023-08-29 21:42:54,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75070285] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:42:54,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:42:54,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:42:54,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669229564] [2023-08-29 21:42:54,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:42:54,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:42:54,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:54,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:42:54,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:42:54,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 360 [2023-08-29 21:42:54,844 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 61 transitions, 153 flow. Second operand has 4 states, 4 states have (on average 157.25) internal successors, (629), 4 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 21:42:54,844 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:54,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 360 [2023-08-29 21:42:54,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:55,774 INFO L130 PetriNetUnfolder]: 13354/20087 cut-off events. [2023-08-29 21:42:55,775 INFO L131 PetriNetUnfolder]: For 6110/6110 co-relation queries the response was YES. [2023-08-29 21:42:55,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43372 conditions, 20087 events. 13354/20087 cut-off events. For 6110/6110 co-relation queries the response was YES. Maximal size of possible extension queue 707. Compared 136732 event pairs, 13354 based on Foata normal form. 1371/17542 useless extension candidates. Maximal degree in co-relation 32080. Up to 19008 conditions per place. [2023-08-29 21:42:55,841 INFO L137 encePairwiseOnDemand]: 353/360 looper letters, 40 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-08-29 21:42:55,841 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 55 transitions, 223 flow [2023-08-29 21:42:55,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:42:55,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:42:55,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 513 transitions. [2023-08-29 21:42:55,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2023-08-29 21:42:55,842 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 513 transitions. [2023-08-29 21:42:55,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 513 transitions. [2023-08-29 21:42:55,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:55,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 513 transitions. [2023-08-29 21:42:55,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:55,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:55,845 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:55,845 INFO L175 Difference]: Start difference. First operand has 73 places, 61 transitions, 153 flow. Second operand 3 states and 513 transitions. [2023-08-29 21:42:55,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 55 transitions, 223 flow [2023-08-29 21:42:55,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 55 transitions, 214 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-29 21:42:55,848 INFO L231 Difference]: Finished difference. Result has 66 places, 55 transitions, 134 flow [2023-08-29 21:42:55,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=66, PETRI_TRANSITIONS=55} [2023-08-29 21:42:55,849 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, -19 predicate places. [2023-08-29 21:42:55,849 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 55 transitions, 134 flow [2023-08-29 21:42:55,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.25) internal successors, (629), 4 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 21:42:55,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:55,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:42:55,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-29 21:42:55,850 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 21:42:55,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:55,850 INFO L85 PathProgramCache]: Analyzing trace with hash 807391372, now seen corresponding path program 1 times [2023-08-29 21:42:55,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:55,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405545038] [2023-08-29 21:42:55,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:55,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:55,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:55,901 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 21:42:55,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:55,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405545038] [2023-08-29 21:42:55,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405545038] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:42:55,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:42:55,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:42:55,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113779684] [2023-08-29 21:42:55,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:42:55,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:42:55,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:55,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:42:55,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:42:56,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 360 [2023-08-29 21:42:56,030 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 55 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 141.2) internal successors, (706), 5 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:56,030 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:56,030 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 360 [2023-08-29 21:42:56,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:56,573 INFO L130 PetriNetUnfolder]: 7668/11475 cut-off events. [2023-08-29 21:42:56,574 INFO L131 PetriNetUnfolder]: For 1432/1432 co-relation queries the response was YES. [2023-08-29 21:42:56,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23943 conditions, 11475 events. 7668/11475 cut-off events. For 1432/1432 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 67470 event pairs, 7668 based on Foata normal form. 0/11396 useless extension candidates. Maximal degree in co-relation 23933. Up to 11000 conditions per place. [2023-08-29 21:42:56,585 INFO L137 encePairwiseOnDemand]: 347/360 looper letters, 0 selfloop transitions, 0 changer transitions 43/43 dead transitions. [2023-08-29 21:42:56,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 43 transitions, 180 flow [2023-08-29 21:42:56,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:42:56,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:42:56,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 465 transitions. [2023-08-29 21:42:56,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2023-08-29 21:42:56,587 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 465 transitions. [2023-08-29 21:42:56,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 465 transitions. [2023-08-29 21:42:56,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:56,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 465 transitions. [2023-08-29 21:42:56,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:56,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:56,590 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:56,590 INFO L175 Difference]: Start difference. First operand has 66 places, 55 transitions, 134 flow. Second operand 3 states and 465 transitions. [2023-08-29 21:42:56,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 43 transitions, 180 flow [2023-08-29 21:42:56,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 43 transitions, 179 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:42:56,591 INFO L231 Difference]: Finished difference. Result has 55 places, 0 transitions, 0 flow [2023-08-29 21:42:56,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=55, PETRI_TRANSITIONS=0} [2023-08-29 21:42:56,591 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, -30 predicate places. [2023-08-29 21:42:56,591 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 0 transitions, 0 flow [2023-08-29 21:42:56,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.2) internal successors, (706), 5 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:56,592 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (37 of 38 remaining) [2023-08-29 21:42:56,592 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 38 remaining) [2023-08-29 21:42:56,592 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 38 remaining) [2023-08-29 21:42:56,592 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 38 remaining) [2023-08-29 21:42:56,592 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 38 remaining) [2023-08-29 21:42:56,592 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 38 remaining) [2023-08-29 21:42:56,592 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 38 remaining) [2023-08-29 21:42:56,592 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 38 remaining) [2023-08-29 21:42:56,593 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 38 remaining) [2023-08-29 21:42:56,593 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 38 remaining) [2023-08-29 21:42:56,593 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 38 remaining) [2023-08-29 21:42:56,593 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 38 remaining) [2023-08-29 21:42:56,593 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 38 remaining) [2023-08-29 21:42:56,593 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 38 remaining) [2023-08-29 21:42:56,593 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 38 remaining) [2023-08-29 21:42:56,593 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 38 remaining) [2023-08-29 21:42:56,593 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 38 remaining) [2023-08-29 21:42:56,594 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 38 remaining) [2023-08-29 21:42:56,594 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 38 remaining) [2023-08-29 21:42:56,594 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 38 remaining) [2023-08-29 21:42:56,594 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 38 remaining) [2023-08-29 21:42:56,594 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 38 remaining) [2023-08-29 21:42:56,594 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 38 remaining) [2023-08-29 21:42:56,594 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 38 remaining) [2023-08-29 21:42:56,594 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 38 remaining) [2023-08-29 21:42:56,594 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 38 remaining) [2023-08-29 21:42:56,595 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 38 remaining) [2023-08-29 21:42:56,595 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 38 remaining) [2023-08-29 21:42:56,595 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 38 remaining) [2023-08-29 21:42:56,595 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 38 remaining) [2023-08-29 21:42:56,595 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 38 remaining) [2023-08-29 21:42:56,595 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 38 remaining) [2023-08-29 21:42:56,595 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 38 remaining) [2023-08-29 21:42:56,595 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 38 remaining) [2023-08-29 21:42:56,596 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (3 of 38 remaining) [2023-08-29 21:42:56,596 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 38 remaining) [2023-08-29 21:42:56,596 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 38 remaining) [2023-08-29 21:42:56,596 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 38 remaining) [2023-08-29 21:42:56,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-29 21:42:56,596 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-29 21:42:56,597 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:42:56,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 198 transitions, 417 flow [2023-08-29 21:42:56,613 INFO L130 PetriNetUnfolder]: 34/322 cut-off events. [2023-08-29 21:42:56,613 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 21:42:56,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 322 events. 34/322 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1168 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 242. Up to 8 conditions per place. [2023-08-29 21:42:56,615 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 198 transitions, 417 flow [2023-08-29 21:42:56,616 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 198 transitions, 417 flow [2023-08-29 21:42:56,616 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:42:56,616 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 183 places, 198 transitions, 417 flow [2023-08-29 21:42:56,616 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 183 places, 198 transitions, 417 flow [2023-08-29 21:42:56,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 198 transitions, 417 flow [2023-08-29 21:42:56,631 INFO L130 PetriNetUnfolder]: 34/322 cut-off events. [2023-08-29 21:42:56,631 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 21:42:56,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 322 events. 34/322 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1168 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 242. Up to 8 conditions per place. [2023-08-29 21:42:56,636 INFO L119 LiptonReduction]: Number of co-enabled transitions 20400 [2023-08-29 21:42:59,331 INFO L134 LiptonReduction]: Checked pairs total: 57891 [2023-08-29 21:42:59,332 INFO L136 LiptonReduction]: Total number of compositions: 162 [2023-08-29 21:42:59,333 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:42:59,333 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;@790c62ad, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:42:59,333 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:42:59,338 INFO L130 PetriNetUnfolder]: 18/119 cut-off events. [2023-08-29 21:42:59,338 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 21:42:59,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:59,339 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-29 21:42:59,339 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:42:59,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:59,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1695335277, now seen corresponding path program 1 times [2023-08-29 21:42:59,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:59,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415641944] [2023-08-29 21:42:59,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:59,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:59,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:42:59,356 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:42:59,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:42:59,370 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:42:59,371 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:42:59,371 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:42:59,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-29 21:42:59,371 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:42:59,373 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:42:59,374 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:42:59,374 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-29 21:42:59,396 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 21:42:59,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 239 transitions, 510 flow [2023-08-29 21:42:59,426 INFO L130 PetriNetUnfolder]: 44/406 cut-off events. [2023-08-29 21:42:59,426 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-29 21:42:59,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429 conditions, 406 events. 44/406 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1547 event pairs, 0 based on Foata normal form. 0/295 useless extension candidates. Maximal degree in co-relation 330. Up to 10 conditions per place. [2023-08-29 21:42:59,428 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 239 transitions, 510 flow [2023-08-29 21:42:59,430 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 220 places, 239 transitions, 510 flow [2023-08-29 21:42:59,430 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:42:59,430 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 220 places, 239 transitions, 510 flow [2023-08-29 21:42:59,430 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 220 places, 239 transitions, 510 flow [2023-08-29 21:42:59,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 239 transitions, 510 flow [2023-08-29 21:42:59,453 INFO L130 PetriNetUnfolder]: 44/406 cut-off events. [2023-08-29 21:42:59,453 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-29 21:42:59,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429 conditions, 406 events. 44/406 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1547 event pairs, 0 based on Foata normal form. 0/295 useless extension candidates. Maximal degree in co-relation 330. Up to 10 conditions per place. [2023-08-29 21:42:59,461 INFO L119 LiptonReduction]: Number of co-enabled transitions 33760 [2023-08-29 21:43:02,321 INFO L134 LiptonReduction]: Checked pairs total: 97655 [2023-08-29 21:43:02,321 INFO L136 LiptonReduction]: Total number of compositions: 191 [2023-08-29 21:43:02,322 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:43:02,322 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;@790c62ad, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:43:02,322 INFO L358 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2023-08-29 21:43:02,323 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 21:43:02,323 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:43:02,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:02,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:43:02,323 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 21:43:02,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:02,324 INFO L85 PathProgramCache]: Analyzing trace with hash 65121, now seen corresponding path program 1 times [2023-08-29 21:43:02,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:02,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746943663] [2023-08-29 21:43:02,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:02,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:02,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:02,360 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 21:43:02,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:43:02,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746943663] [2023-08-29 21:43:02,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746943663] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:43:02,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:43:02,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:43:02,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072678337] [2023-08-29 21:43:02,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:43:02,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:43:02,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:43:02,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:43:02,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:43:02,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 430 [2023-08-29 21:43:02,418 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 124 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:02,418 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:43:02,419 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 430 [2023-08-29 21:43:02,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand