./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread-ext/36_stack_cas_p0_vs_concur.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread-ext/36_stack_cas_p0_vs_concur.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 e7fe0631e7f950e2868c8cb954edca4f6de3fdffbf6debba58771511fbac2e8b --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 02:35:53,579 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 02:35:53,581 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 02:35:53,627 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 02:35:53,628 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 02:35:53,631 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 02:35:53,633 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 02:35:53,636 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 02:35:53,638 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 02:35:53,643 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 02:35:53,644 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 02:35:53,646 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 02:35:53,646 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 02:35:53,648 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 02:35:53,650 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 02:35:53,656 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 02:35:53,657 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 02:35:53,659 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 02:35:53,660 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 02:35:53,667 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 02:35:53,668 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 02:35:53,669 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 02:35:53,670 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 02:35:53,671 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 02:35:53,678 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 02:35:53,678 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 02:35:53,678 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 02:35:53,680 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 02:35:53,681 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 02:35:53,682 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 02:35:53,682 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 02:35:53,684 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 02:35:53,685 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 02:35:53,686 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 02:35:53,687 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 02:35:53,687 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 02:35:53,687 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 02:35:53,688 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 02:35:53,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 02:35:53,689 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 02:35:53,689 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 02:35:53,691 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 02:35:53,726 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 02:35:53,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 02:35:53,728 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 02:35:53,728 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 02:35:53,729 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 02:35:53,729 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 02:35:53,730 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 02:35:53,730 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 02:35:53,730 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 02:35:53,731 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 02:35:53,731 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 02:35:53,732 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 02:35:53,732 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 02:35:53,732 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 02:35:53,732 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 02:35:53,732 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 02:35:53,732 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 02:35:53,733 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 02:35:53,733 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 02:35:53,733 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 02:35:53,733 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 02:35:53,733 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 02:35:53,733 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 02:35:53,734 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 02:35:53,734 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 02:35:53,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 02:35:53,734 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 02:35:53,734 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 02:35:53,735 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 02:35:53,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 02:35:53,735 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 02:35:53,735 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 02:35:53,735 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 02:35:53,736 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 02:35:53,736 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7fe0631e7f950e2868c8cb954edca4f6de3fdffbf6debba58771511fbac2e8b Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 02:35:54,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 02:35:54,078 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 02:35:54,080 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 02:35:54,081 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 02:35:54,082 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 02:35:54,083 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/36_stack_cas_p0_vs_concur.i [2023-08-30 02:35:55,387 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 02:35:55,659 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 02:35:55,659 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/36_stack_cas_p0_vs_concur.i [2023-08-30 02:35:55,671 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0afc05906/21ff0142782f482a949232e873967bf8/FLAG228afc59c [2023-08-30 02:35:55,684 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0afc05906/21ff0142782f482a949232e873967bf8 [2023-08-30 02:35:55,686 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 02:35:55,687 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 02:35:55,688 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 02:35:55,688 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 02:35:55,699 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 02:35:55,700 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:35:55" (1/1) ... [2023-08-30 02:35:55,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7de20541 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:35:55, skipping insertion in model container [2023-08-30 02:35:55,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:35:55" (1/1) ... [2023-08-30 02:35:55,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 02:35:55,745 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 02:35:55,997 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/36_stack_cas_p0_vs_concur.i[30687,30700] [2023-08-30 02:35:56,005 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 02:35:56,016 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 02:35:56,060 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/36_stack_cas_p0_vs_concur.i[30687,30700] [2023-08-30 02:35:56,064 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 02:35:56,108 INFO L208 MainTranslator]: Completed translation [2023-08-30 02:35:56,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:35:56 WrapperNode [2023-08-30 02:35:56,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 02:35:56,110 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 02:35:56,110 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 02:35:56,111 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 02:35:56,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:35:56" (1/1) ... [2023-08-30 02:35:56,148 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:35:56" (1/1) ... [2023-08-30 02:35:56,178 INFO L138 Inliner]: procedures = 170, calls = 35, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 104 [2023-08-30 02:35:56,178 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 02:35:56,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 02:35:56,180 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 02:35:56,180 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 02:35:56,188 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:35:56" (1/1) ... [2023-08-30 02:35:56,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:35:56" (1/1) ... [2023-08-30 02:35:56,193 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:35:56" (1/1) ... [2023-08-30 02:35:56,194 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:35:56" (1/1) ... [2023-08-30 02:35:56,198 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:35:56" (1/1) ... [2023-08-30 02:35:56,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:35:56" (1/1) ... [2023-08-30 02:35:56,210 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:35:56" (1/1) ... [2023-08-30 02:35:56,211 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:35:56" (1/1) ... [2023-08-30 02:35:56,214 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 02:35:56,215 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 02:35:56,218 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 02:35:56,218 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 02:35:56,219 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:35:56" (1/1) ... [2023-08-30 02:35:56,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 02:35:56,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:35:56,254 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 02:35:56,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 02:35:56,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 02:35:56,300 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-30 02:35:56,301 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-30 02:35:56,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 02:35:56,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 02:35:56,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 02:35:56,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 02:35:56,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 02:35:56,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 02:35:56,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 02:35:56,305 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 02:35:56,486 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 02:35:56,502 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 02:35:56,887 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 02:35:57,004 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 02:35:57,005 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 02:35:57,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:35:57 BoogieIcfgContainer [2023-08-30 02:35:57,008 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 02:35:57,009 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 02:35:57,010 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 02:35:57,012 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 02:35:57,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 02:35:55" (1/3) ... [2023-08-30 02:35:57,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20d290f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:35:57, skipping insertion in model container [2023-08-30 02:35:57,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:35:56" (2/3) ... [2023-08-30 02:35:57,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20d290f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:35:57, skipping insertion in model container [2023-08-30 02:35:57,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:35:57" (3/3) ... [2023-08-30 02:35:57,015 INFO L112 eAbstractionObserver]: Analyzing ICFG 36_stack_cas_p0_vs_concur.i [2023-08-30 02:35:57,031 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 02:35:57,031 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2023-08-30 02:35:57,032 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 02:35:57,130 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 02:35:57,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 127 transitions, 259 flow [2023-08-30 02:35:57,246 INFO L130 PetriNetUnfolder]: 10/142 cut-off events. [2023-08-30 02:35:57,246 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:35:57,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 142 events. 10/142 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 299 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 109. Up to 4 conditions per place. [2023-08-30 02:35:57,253 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 127 transitions, 259 flow [2023-08-30 02:35:57,261 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 127 transitions, 259 flow [2023-08-30 02:35:57,265 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:35:57,283 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 127 transitions, 259 flow [2023-08-30 02:35:57,290 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 127 transitions, 259 flow [2023-08-30 02:35:57,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 127 transitions, 259 flow [2023-08-30 02:35:57,341 INFO L130 PetriNetUnfolder]: 10/142 cut-off events. [2023-08-30 02:35:57,342 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:35:57,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 142 events. 10/142 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 299 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 109. Up to 4 conditions per place. [2023-08-30 02:35:57,346 INFO L119 LiptonReduction]: Number of co-enabled transitions 3312 [2023-08-30 02:35:59,965 INFO L134 LiptonReduction]: Checked pairs total: 8292 [2023-08-30 02:35:59,965 INFO L136 LiptonReduction]: Total number of compositions: 112 [2023-08-30 02:35:59,977 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:35:59,982 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;@63e4ca2b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:35:59,983 INFO L358 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2023-08-30 02:35:59,985 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2023-08-30 02:35:59,985 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:35:59,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:35:59,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:35:59,986 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-08-30 02:35:59,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:35:59,990 INFO L85 PathProgramCache]: Analyzing trace with hash 19236, now seen corresponding path program 1 times [2023-08-30 02:35:59,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:35:59,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320061775] [2023-08-30 02:35:59,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:35:59,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:00,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:36:00,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:36:00,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:36:00,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320061775] [2023-08-30 02:36:00,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320061775] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:36:00,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:36:00,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:36:00,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784056739] [2023-08-30 02:36:00,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:36:00,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:36:00,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:36:00,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:36:00,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:36:00,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 239 [2023-08-30 02:36:00,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 58 transitions, 121 flow. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:00,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:36:00,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 239 [2023-08-30 02:36:00,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:36:00,454 INFO L130 PetriNetUnfolder]: 218/531 cut-off events. [2023-08-30 02:36:00,455 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:36:00,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1037 conditions, 531 events. 218/531 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2238 event pairs, 111 based on Foata normal form. 0/266 useless extension candidates. Maximal degree in co-relation 1006. Up to 259 conditions per place. [2023-08-30 02:36:00,460 INFO L137 encePairwiseOnDemand]: 225/239 looper letters, 69 selfloop transitions, 4 changer transitions 0/80 dead transitions. [2023-08-30 02:36:00,460 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 80 transitions, 311 flow [2023-08-30 02:36:00,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:36:00,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:36:00,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 371 transitions. [2023-08-30 02:36:00,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5174337517433751 [2023-08-30 02:36:00,473 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 371 transitions. [2023-08-30 02:36:00,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 371 transitions. [2023-08-30 02:36:00,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:36:00,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 371 transitions. [2023-08-30 02:36:00,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:00,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:00,484 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:00,486 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 121 flow. Second operand 3 states and 371 transitions. [2023-08-30 02:36:00,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 80 transitions, 311 flow [2023-08-30 02:36:00,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 80 transitions, 311 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:36:00,490 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 125 flow [2023-08-30 02:36:00,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2023-08-30 02:36:00,495 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -8 predicate places. [2023-08-30 02:36:00,495 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 125 flow [2023-08-30 02:36:00,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:00,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:00,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:36:00,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 02:36:00,496 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-08-30 02:36:00,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:00,497 INFO L85 PathProgramCache]: Analyzing trace with hash 19234, now seen corresponding path program 1 times [2023-08-30 02:36:00,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:00,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972701906] [2023-08-30 02:36:00,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:00,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:00,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:36:00,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:36:00,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:36:00,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972701906] [2023-08-30 02:36:00,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972701906] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:36:00,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:36:00,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:36:00,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909190198] [2023-08-30 02:36:00,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:36:00,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:36:00,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:36:00,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:36:00,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:36:00,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 239 [2023-08-30 02:36:00,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 125 flow. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:00,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:36:00,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 239 [2023-08-30 02:36:00,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:36:00,821 INFO L130 PetriNetUnfolder]: 225/600 cut-off events. [2023-08-30 02:36:00,821 INFO L131 PetriNetUnfolder]: For 154/154 co-relation queries the response was YES. [2023-08-30 02:36:00,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1329 conditions, 600 events. 225/600 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2918 event pairs, 90 based on Foata normal form. 2/399 useless extension candidates. Maximal degree in co-relation 1247. Up to 442 conditions per place. [2023-08-30 02:36:00,827 INFO L137 encePairwiseOnDemand]: 232/239 looper letters, 70 selfloop transitions, 7 changer transitions 0/83 dead transitions. [2023-08-30 02:36:00,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 83 transitions, 357 flow [2023-08-30 02:36:00,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:36:00,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:36:00,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2023-08-30 02:36:00,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5062761506276151 [2023-08-30 02:36:00,832 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2023-08-30 02:36:00,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2023-08-30 02:36:00,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:36:00,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2023-08-30 02:36:00,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:00,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:00,838 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:00,839 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 125 flow. Second operand 3 states and 363 transitions. [2023-08-30 02:36:00,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 83 transitions, 357 flow [2023-08-30 02:36:00,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 83 transitions, 347 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:36:00,844 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 169 flow [2023-08-30 02:36:00,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=52, PETRI_TRANSITIONS=53} [2023-08-30 02:36:00,845 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -6 predicate places. [2023-08-30 02:36:00,845 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 169 flow [2023-08-30 02:36:00,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:00,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:00,846 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 02:36:00,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 02:36:00,846 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-08-30 02:36:00,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:00,849 INFO L85 PathProgramCache]: Analyzing trace with hash 598310768, now seen corresponding path program 1 times [2023-08-30 02:36:00,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:00,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836980822] [2023-08-30 02:36:00,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:00,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:00,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:36:00,885 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 02:36:00,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:36:00,928 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 02:36:00,928 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 02:36:00,931 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (61 of 62 remaining) [2023-08-30 02:36:00,933 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 62 remaining) [2023-08-30 02:36:00,934 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 62 remaining) [2023-08-30 02:36:00,934 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 62 remaining) [2023-08-30 02:36:00,937 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 62 remaining) [2023-08-30 02:36:00,938 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 62 remaining) [2023-08-30 02:36:00,938 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 62 remaining) [2023-08-30 02:36:00,938 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 62 remaining) [2023-08-30 02:36:00,938 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 62 remaining) [2023-08-30 02:36:00,938 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (52 of 62 remaining) [2023-08-30 02:36:00,939 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 62 remaining) [2023-08-30 02:36:00,939 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 62 remaining) [2023-08-30 02:36:00,939 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 62 remaining) [2023-08-30 02:36:00,940 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 62 remaining) [2023-08-30 02:36:00,940 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13ASSERT_VIOLATIONARRAY_INDEX (47 of 62 remaining) [2023-08-30 02:36:00,940 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 62 remaining) [2023-08-30 02:36:00,941 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 62 remaining) [2023-08-30 02:36:00,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 62 remaining) [2023-08-30 02:36:00,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 62 remaining) [2023-08-30 02:36:00,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 62 remaining) [2023-08-30 02:36:00,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 62 remaining) [2023-08-30 02:36:00,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 62 remaining) [2023-08-30 02:36:00,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 62 remaining) [2023-08-30 02:36:00,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 62 remaining) [2023-08-30 02:36:00,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 62 remaining) [2023-08-30 02:36:00,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 62 remaining) [2023-08-30 02:36:00,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 62 remaining) [2023-08-30 02:36:00,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28ASSERT_VIOLATIONMEMORY_LEAK (34 of 62 remaining) [2023-08-30 02:36:00,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 62 remaining) [2023-08-30 02:36:00,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 62 remaining) [2023-08-30 02:36:00,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 62 remaining) [2023-08-30 02:36:00,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 62 remaining) [2023-08-30 02:36:00,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (29 of 62 remaining) [2023-08-30 02:36:00,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 62 remaining) [2023-08-30 02:36:00,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 62 remaining) [2023-08-30 02:36:00,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 62 remaining) [2023-08-30 02:36:00,953 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 62 remaining) [2023-08-30 02:36:00,953 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 62 remaining) [2023-08-30 02:36:00,953 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 62 remaining) [2023-08-30 02:36:00,953 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 62 remaining) [2023-08-30 02:36:00,954 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 62 remaining) [2023-08-30 02:36:00,954 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (20 of 62 remaining) [2023-08-30 02:36:00,954 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 62 remaining) [2023-08-30 02:36:00,954 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 62 remaining) [2023-08-30 02:36:00,954 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 62 remaining) [2023-08-30 02:36:00,954 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 62 remaining) [2023-08-30 02:36:00,954 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13ASSERT_VIOLATIONARRAY_INDEX (15 of 62 remaining) [2023-08-30 02:36:00,955 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 62 remaining) [2023-08-30 02:36:00,955 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 62 remaining) [2023-08-30 02:36:00,955 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 62 remaining) [2023-08-30 02:36:00,955 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 62 remaining) [2023-08-30 02:36:00,955 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 62 remaining) [2023-08-30 02:36:00,955 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 62 remaining) [2023-08-30 02:36:00,956 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 62 remaining) [2023-08-30 02:36:00,956 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 62 remaining) [2023-08-30 02:36:00,956 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 62 remaining) [2023-08-30 02:36:00,956 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 62 remaining) [2023-08-30 02:36:00,956 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 62 remaining) [2023-08-30 02:36:00,956 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 62 remaining) [2023-08-30 02:36:00,956 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28ASSERT_VIOLATIONMEMORY_LEAK (2 of 62 remaining) [2023-08-30 02:36:00,957 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 62 remaining) [2023-08-30 02:36:00,957 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 62 remaining) [2023-08-30 02:36:00,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 02:36:00,957 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 02:36:00,960 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 02:36:00,960 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 02:36:01,027 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 02:36:01,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 208 places, 220 transitions, 452 flow [2023-08-30 02:36:01,063 INFO L130 PetriNetUnfolder]: 19/252 cut-off events. [2023-08-30 02:36:01,064 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 02:36:01,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 252 events. 19/252 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 869 event pairs, 0 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 201. Up to 6 conditions per place. [2023-08-30 02:36:01,068 INFO L82 GeneralOperation]: Start removeDead. Operand has 208 places, 220 transitions, 452 flow [2023-08-30 02:36:01,072 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 208 places, 220 transitions, 452 flow [2023-08-30 02:36:01,072 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:36:01,072 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 208 places, 220 transitions, 452 flow [2023-08-30 02:36:01,073 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 208 places, 220 transitions, 452 flow [2023-08-30 02:36:01,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 208 places, 220 transitions, 452 flow [2023-08-30 02:36:01,122 INFO L130 PetriNetUnfolder]: 19/252 cut-off events. [2023-08-30 02:36:01,123 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 02:36:01,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 252 events. 19/252 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 869 event pairs, 0 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 201. Up to 6 conditions per place. [2023-08-30 02:36:01,137 INFO L119 LiptonReduction]: Number of co-enabled transitions 23736 [2023-08-30 02:36:04,425 INFO L134 LiptonReduction]: Checked pairs total: 83259 [2023-08-30 02:36:04,429 INFO L136 LiptonReduction]: Total number of compositions: 160 [2023-08-30 02:36:04,432 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:36:04,436 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;@63e4ca2b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:36:04,436 INFO L358 AbstractCegarLoop]: Starting to check reachability of 91 error locations. [2023-08-30 02:36:04,438 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2023-08-30 02:36:04,438 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:36:04,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:04,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:36:04,439 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-08-30 02:36:04,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:04,440 INFO L85 PathProgramCache]: Analyzing trace with hash 34396, now seen corresponding path program 1 times [2023-08-30 02:36:04,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:04,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051835609] [2023-08-30 02:36:04,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:04,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:04,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:36:04,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:36:04,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:36:04,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051835609] [2023-08-30 02:36:04,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051835609] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:36:04,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:36:04,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:36:04,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40097922] [2023-08-30 02:36:04,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:36:04,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:36:04,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:36:04,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:36:04,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:36:04,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 380 [2023-08-30 02:36:04,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 112 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:04,553 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:36:04,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 380 [2023-08-30 02:36:04,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:36:05,571 INFO L130 PetriNetUnfolder]: 5065/9171 cut-off events. [2023-08-30 02:36:05,571 INFO L131 PetriNetUnfolder]: For 98/98 co-relation queries the response was YES. [2023-08-30 02:36:05,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17320 conditions, 9171 events. 5065/9171 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 76795 event pairs, 4687 based on Foata normal form. 0/4180 useless extension candidates. Maximal degree in co-relation 13585. Up to 8036 conditions per place. [2023-08-30 02:36:05,634 INFO L137 encePairwiseOnDemand]: 368/380 looper letters, 66 selfloop transitions, 1 changer transitions 0/96 dead transitions. [2023-08-30 02:36:05,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 96 transitions, 338 flow [2023-08-30 02:36:05,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:36:05,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:36:05,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 588 transitions. [2023-08-30 02:36:05,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5157894736842106 [2023-08-30 02:36:05,637 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 588 transitions. [2023-08-30 02:36:05,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 588 transitions. [2023-08-30 02:36:05,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:36:05,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 588 transitions. [2023-08-30 02:36:05,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:05,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:05,642 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:05,642 INFO L175 Difference]: Start difference. First operand has 110 places, 112 transitions, 236 flow. Second operand 3 states and 588 transitions. [2023-08-30 02:36:05,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 96 transitions, 338 flow [2023-08-30 02:36:05,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 96 transitions, 336 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 02:36:05,646 INFO L231 Difference]: Finished difference. Result has 99 places, 96 transitions, 204 flow [2023-08-30 02:36:05,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=99, PETRI_TRANSITIONS=96} [2023-08-30 02:36:05,649 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -11 predicate places. [2023-08-30 02:36:05,649 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 96 transitions, 204 flow [2023-08-30 02:36:05,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:05,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:05,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:36:05,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 02:36:05,650 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-08-30 02:36:05,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:05,651 INFO L85 PathProgramCache]: Analyzing trace with hash 34395, now seen corresponding path program 1 times [2023-08-30 02:36:05,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:05,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338583427] [2023-08-30 02:36:05,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:05,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:05,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:36:05,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:36:05,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:36:05,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338583427] [2023-08-30 02:36:05,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338583427] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:36:05,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:36:05,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:36:05,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511712234] [2023-08-30 02:36:05,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:36:05,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:36:05,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:36:05,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:36:05,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:36:05,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 380 [2023-08-30 02:36:05,777 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 96 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:05,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:36:05,778 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 380 [2023-08-30 02:36:05,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:36:07,337 INFO L130 PetriNetUnfolder]: 7895/14709 cut-off events. [2023-08-30 02:36:07,337 INFO L131 PetriNetUnfolder]: For 173/173 co-relation queries the response was YES. [2023-08-30 02:36:07,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27858 conditions, 14709 events. 7895/14709 cut-off events. For 173/173 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 124487 event pairs, 3419 based on Foata normal form. 0/7260 useless extension candidates. Maximal degree in co-relation 27850. Up to 7272 conditions per place. [2023-08-30 02:36:07,447 INFO L137 encePairwiseOnDemand]: 373/380 looper letters, 125 selfloop transitions, 6 changer transitions 0/160 dead transitions. [2023-08-30 02:36:07,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 160 transitions, 599 flow [2023-08-30 02:36:07,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:36:07,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:36:07,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 612 transitions. [2023-08-30 02:36:07,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5368421052631579 [2023-08-30 02:36:07,450 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 612 transitions. [2023-08-30 02:36:07,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 612 transitions. [2023-08-30 02:36:07,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:36:07,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 612 transitions. [2023-08-30 02:36:07,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:07,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:07,455 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:07,455 INFO L175 Difference]: Start difference. First operand has 99 places, 96 transitions, 204 flow. Second operand 3 states and 612 transitions. [2023-08-30 02:36:07,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 160 transitions, 599 flow [2023-08-30 02:36:07,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 160 transitions, 598 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:36:07,460 INFO L231 Difference]: Finished difference. Result has 102 places, 101 transitions, 249 flow [2023-08-30 02:36:07,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=249, PETRI_PLACES=102, PETRI_TRANSITIONS=101} [2023-08-30 02:36:07,461 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -8 predicate places. [2023-08-30 02:36:07,462 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 101 transitions, 249 flow [2023-08-30 02:36:07,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:07,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:07,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:36:07,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 02:36:07,463 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-08-30 02:36:07,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:07,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1966388138, now seen corresponding path program 1 times [2023-08-30 02:36:07,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:07,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498736459] [2023-08-30 02:36:07,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:07,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:07,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:36:07,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:36:07,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:36:07,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498736459] [2023-08-30 02:36:07,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498736459] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:36:07,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:36:07,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:36:07,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375723318] [2023-08-30 02:36:07,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:36:07,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:36:07,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:36:07,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:36:07,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:36:07,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 380 [2023-08-30 02:36:07,694 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 101 transitions, 249 flow. Second operand has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:07,694 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:36:07,694 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 380 [2023-08-30 02:36:07,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:36:09,777 INFO L130 PetriNetUnfolder]: 13032/23542 cut-off events. [2023-08-30 02:36:09,778 INFO L131 PetriNetUnfolder]: For 8935/8939 co-relation queries the response was YES. [2023-08-30 02:36:09,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52468 conditions, 23542 events. 13032/23542 cut-off events. For 8935/8939 co-relation queries the response was YES. Maximal size of possible extension queue 1069. Compared 214945 event pairs, 3244 based on Foata normal form. 0/13223 useless extension candidates. Maximal degree in co-relation 52457. Up to 10673 conditions per place. [2023-08-30 02:36:09,927 INFO L137 encePairwiseOnDemand]: 363/380 looper letters, 125 selfloop transitions, 14 changer transitions 0/164 dead transitions. [2023-08-30 02:36:09,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 164 transitions, 684 flow [2023-08-30 02:36:09,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:36:09,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:36:09,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 595 transitions. [2023-08-30 02:36:09,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5219298245614035 [2023-08-30 02:36:09,931 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 595 transitions. [2023-08-30 02:36:09,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 595 transitions. [2023-08-30 02:36:09,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:36:09,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 595 transitions. [2023-08-30 02:36:09,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:09,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:09,936 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:09,936 INFO L175 Difference]: Start difference. First operand has 102 places, 101 transitions, 249 flow. Second operand 3 states and 595 transitions. [2023-08-30 02:36:09,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 164 transitions, 684 flow [2023-08-30 02:36:09,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 164 transitions, 664 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:36:09,978 INFO L231 Difference]: Finished difference. Result has 104 places, 114 transitions, 369 flow [2023-08-30 02:36:09,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=369, PETRI_PLACES=104, PETRI_TRANSITIONS=114} [2023-08-30 02:36:09,983 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -6 predicate places. [2023-08-30 02:36:09,983 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 114 transitions, 369 flow [2023-08-30 02:36:09,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:09,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:09,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:36:09,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 02:36:09,984 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-08-30 02:36:09,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:09,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1966388139, now seen corresponding path program 1 times [2023-08-30 02:36:09,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:09,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886885871] [2023-08-30 02:36:09,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:09,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:10,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:36:10,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:36:10,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:36:10,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886885871] [2023-08-30 02:36:10,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886885871] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:36:10,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:36:10,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:36:10,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079048075] [2023-08-30 02:36:10,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:36:10,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 02:36:10,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:36:10,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 02:36:10,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 02:36:10,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 380 [2023-08-30 02:36:10,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 114 transitions, 369 flow. Second operand has 4 states, 4 states have (on average 150.5) internal successors, (602), 4 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:10,291 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:36:10,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 380 [2023-08-30 02:36:10,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:36:12,350 INFO L130 PetriNetUnfolder]: 11729/20807 cut-off events. [2023-08-30 02:36:12,351 INFO L131 PetriNetUnfolder]: For 7501/7501 co-relation queries the response was YES. [2023-08-30 02:36:12,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50123 conditions, 20807 events. 11729/20807 cut-off events. For 7501/7501 co-relation queries the response was YES. Maximal size of possible extension queue 914. Compared 182388 event pairs, 2806 based on Foata normal form. 1380/12199 useless extension candidates. Maximal degree in co-relation 50112. Up to 9482 conditions per place. [2023-08-30 02:36:12,456 INFO L137 encePairwiseOnDemand]: 362/380 looper letters, 154 selfloop transitions, 16 changer transitions 0/192 dead transitions. [2023-08-30 02:36:12,457 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 192 transitions, 903 flow [2023-08-30 02:36:12,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 02:36:12,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 02:36:12,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 766 transitions. [2023-08-30 02:36:12,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5039473684210526 [2023-08-30 02:36:12,460 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 766 transitions. [2023-08-30 02:36:12,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 766 transitions. [2023-08-30 02:36:12,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:36:12,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 766 transitions. [2023-08-30 02:36:12,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 191.5) internal successors, (766), 4 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:12,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 380.0) internal successors, (1900), 5 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:12,467 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 380.0) internal successors, (1900), 5 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:12,467 INFO L175 Difference]: Start difference. First operand has 104 places, 114 transitions, 369 flow. Second operand 4 states and 766 transitions. [2023-08-30 02:36:12,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 192 transitions, 903 flow [2023-08-30 02:36:12,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 192 transitions, 875 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:36:12,486 INFO L231 Difference]: Finished difference. Result has 99 places, 108 transitions, 361 flow [2023-08-30 02:36:12,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=361, PETRI_PLACES=99, PETRI_TRANSITIONS=108} [2023-08-30 02:36:12,487 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -11 predicate places. [2023-08-30 02:36:12,488 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 108 transitions, 361 flow [2023-08-30 02:36:12,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 150.5) internal successors, (602), 4 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:12,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:12,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:36:12,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 02:36:12,489 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err8ASSERT_VIOLATIONARRAY_INDEX === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-08-30 02:36:12,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:12,490 INFO L85 PathProgramCache]: Analyzing trace with hash -86572483, now seen corresponding path program 1 times [2023-08-30 02:36:12,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:12,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947869539] [2023-08-30 02:36:12,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:12,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:12,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:36:12,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:36:12,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:36:12,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947869539] [2023-08-30 02:36:12,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947869539] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:36:12,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:36:12,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:36:12,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226168886] [2023-08-30 02:36:12,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:36:12,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 02:36:12,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:36:12,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 02:36:12,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 02:36:12,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 380 [2023-08-30 02:36:12,696 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 108 transitions, 361 flow. Second operand has 4 states, 4 states have (on average 169.75) internal successors, (679), 4 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:12,696 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:36:12,696 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 380 [2023-08-30 02:36:12,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:36:14,251 INFO L130 PetriNetUnfolder]: 11956/21141 cut-off events. [2023-08-30 02:36:14,251 INFO L131 PetriNetUnfolder]: For 7060/7278 co-relation queries the response was YES. [2023-08-30 02:36:14,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49939 conditions, 21141 events. 11956/21141 cut-off events. For 7060/7278 co-relation queries the response was YES. Maximal size of possible extension queue 880. Compared 179616 event pairs, 5237 based on Foata normal form. 0/10538 useless extension candidates. Maximal degree in co-relation 49928. Up to 18557 conditions per place. [2023-08-30 02:36:14,391 INFO L137 encePairwiseOnDemand]: 369/380 looper letters, 104 selfloop transitions, 8 changer transitions 0/139 dead transitions. [2023-08-30 02:36:14,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 139 transitions, 673 flow [2023-08-30 02:36:14,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 02:36:14,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 02:36:14,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 771 transitions. [2023-08-30 02:36:14,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5072368421052632 [2023-08-30 02:36:14,395 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 771 transitions. [2023-08-30 02:36:14,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 771 transitions. [2023-08-30 02:36:14,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:36:14,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 771 transitions. [2023-08-30 02:36:14,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 192.75) internal successors, (771), 4 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:14,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 380.0) internal successors, (1900), 5 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:14,400 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 380.0) internal successors, (1900), 5 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:14,400 INFO L175 Difference]: Start difference. First operand has 99 places, 108 transitions, 361 flow. Second operand 4 states and 771 transitions. [2023-08-30 02:36:14,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 139 transitions, 673 flow [2023-08-30 02:36:14,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 139 transitions, 654 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:36:14,409 INFO L231 Difference]: Finished difference. Result has 102 places, 115 transitions, 407 flow [2023-08-30 02:36:14,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=407, PETRI_PLACES=102, PETRI_TRANSITIONS=115} [2023-08-30 02:36:14,410 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -8 predicate places. [2023-08-30 02:36:14,410 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 115 transitions, 407 flow [2023-08-30 02:36:14,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 169.75) internal successors, (679), 4 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:14,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:14,411 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 02:36:14,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 02:36:14,411 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-08-30 02:36:14,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:14,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1670029184, now seen corresponding path program 1 times [2023-08-30 02:36:14,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:14,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846922023] [2023-08-30 02:36:14,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:14,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:36:14,421 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 02:36:14,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:36:14,436 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 02:36:14,436 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 02:36:14,437 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (90 of 91 remaining) [2023-08-30 02:36:14,437 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (89 of 91 remaining) [2023-08-30 02:36:14,437 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (88 of 91 remaining) [2023-08-30 02:36:14,437 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (87 of 91 remaining) [2023-08-30 02:36:14,437 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (86 of 91 remaining) [2023-08-30 02:36:14,438 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (85 of 91 remaining) [2023-08-30 02:36:14,438 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (84 of 91 remaining) [2023-08-30 02:36:14,438 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (83 of 91 remaining) [2023-08-30 02:36:14,438 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (82 of 91 remaining) [2023-08-30 02:36:14,438 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (81 of 91 remaining) [2023-08-30 02:36:14,438 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 91 remaining) [2023-08-30 02:36:14,438 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 91 remaining) [2023-08-30 02:36:14,439 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 91 remaining) [2023-08-30 02:36:14,439 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 91 remaining) [2023-08-30 02:36:14,439 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13ASSERT_VIOLATIONARRAY_INDEX (76 of 91 remaining) [2023-08-30 02:36:14,439 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 91 remaining) [2023-08-30 02:36:14,439 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 91 remaining) [2023-08-30 02:36:14,439 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 91 remaining) [2023-08-30 02:36:14,439 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 91 remaining) [2023-08-30 02:36:14,440 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 91 remaining) [2023-08-30 02:36:14,440 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 91 remaining) [2023-08-30 02:36:14,440 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 91 remaining) [2023-08-30 02:36:14,440 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 91 remaining) [2023-08-30 02:36:14,440 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 91 remaining) [2023-08-30 02:36:14,440 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 91 remaining) [2023-08-30 02:36:14,441 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 91 remaining) [2023-08-30 02:36:14,441 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 91 remaining) [2023-08-30 02:36:14,441 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28ASSERT_VIOLATIONMEMORY_LEAK (63 of 91 remaining) [2023-08-30 02:36:14,441 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 91 remaining) [2023-08-30 02:36:14,441 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 91 remaining) [2023-08-30 02:36:14,441 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 91 remaining) [2023-08-30 02:36:14,442 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 91 remaining) [2023-08-30 02:36:14,442 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (58 of 91 remaining) [2023-08-30 02:36:14,442 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 91 remaining) [2023-08-30 02:36:14,442 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 91 remaining) [2023-08-30 02:36:14,442 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 91 remaining) [2023-08-30 02:36:14,442 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 91 remaining) [2023-08-30 02:36:14,442 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 91 remaining) [2023-08-30 02:36:14,443 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 91 remaining) [2023-08-30 02:36:14,443 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 91 remaining) [2023-08-30 02:36:14,443 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 91 remaining) [2023-08-30 02:36:14,443 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (49 of 91 remaining) [2023-08-30 02:36:14,443 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 91 remaining) [2023-08-30 02:36:14,443 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 91 remaining) [2023-08-30 02:36:14,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 91 remaining) [2023-08-30 02:36:14,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 91 remaining) [2023-08-30 02:36:14,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13ASSERT_VIOLATIONARRAY_INDEX (44 of 91 remaining) [2023-08-30 02:36:14,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 91 remaining) [2023-08-30 02:36:14,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 91 remaining) [2023-08-30 02:36:14,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 91 remaining) [2023-08-30 02:36:14,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 91 remaining) [2023-08-30 02:36:14,445 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 91 remaining) [2023-08-30 02:36:14,445 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 91 remaining) [2023-08-30 02:36:14,445 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 91 remaining) [2023-08-30 02:36:14,445 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 91 remaining) [2023-08-30 02:36:14,445 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 91 remaining) [2023-08-30 02:36:14,445 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 91 remaining) [2023-08-30 02:36:14,446 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 91 remaining) [2023-08-30 02:36:14,446 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 91 remaining) [2023-08-30 02:36:14,446 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28ASSERT_VIOLATIONMEMORY_LEAK (31 of 91 remaining) [2023-08-30 02:36:14,446 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 91 remaining) [2023-08-30 02:36:14,446 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 91 remaining) [2023-08-30 02:36:14,446 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 91 remaining) [2023-08-30 02:36:14,446 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 91 remaining) [2023-08-30 02:36:14,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 91 remaining) [2023-08-30 02:36:14,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 91 remaining) [2023-08-30 02:36:14,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 91 remaining) [2023-08-30 02:36:14,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 91 remaining) [2023-08-30 02:36:14,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 91 remaining) [2023-08-30 02:36:14,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 91 remaining) [2023-08-30 02:36:14,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (20 of 91 remaining) [2023-08-30 02:36:14,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 91 remaining) [2023-08-30 02:36:14,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 91 remaining) [2023-08-30 02:36:14,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 91 remaining) [2023-08-30 02:36:14,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 91 remaining) [2023-08-30 02:36:14,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13ASSERT_VIOLATIONARRAY_INDEX (15 of 91 remaining) [2023-08-30 02:36:14,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 91 remaining) [2023-08-30 02:36:14,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 91 remaining) [2023-08-30 02:36:14,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 91 remaining) [2023-08-30 02:36:14,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 91 remaining) [2023-08-30 02:36:14,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 91 remaining) [2023-08-30 02:36:14,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 91 remaining) [2023-08-30 02:36:14,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 91 remaining) [2023-08-30 02:36:14,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 91 remaining) [2023-08-30 02:36:14,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 91 remaining) [2023-08-30 02:36:14,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 91 remaining) [2023-08-30 02:36:14,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 91 remaining) [2023-08-30 02:36:14,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 91 remaining) [2023-08-30 02:36:14,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28ASSERT_VIOLATIONMEMORY_LEAK (2 of 91 remaining) [2023-08-30 02:36:14,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 91 remaining) [2023-08-30 02:36:14,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 91 remaining) [2023-08-30 02:36:14,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 02:36:14,452 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-30 02:36:14,453 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 02:36:14,453 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 02:36:14,539 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 02:36:14,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 295 places, 313 transitions, 647 flow [2023-08-30 02:36:14,596 INFO L130 PetriNetUnfolder]: 28/362 cut-off events. [2023-08-30 02:36:14,596 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 02:36:14,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 362 events. 28/362 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1503 event pairs, 0 based on Foata normal form. 0/231 useless extension candidates. Maximal degree in co-relation 293. Up to 8 conditions per place. [2023-08-30 02:36:14,602 INFO L82 GeneralOperation]: Start removeDead. Operand has 295 places, 313 transitions, 647 flow [2023-08-30 02:36:14,607 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 295 places, 313 transitions, 647 flow [2023-08-30 02:36:14,608 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:36:14,608 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 295 places, 313 transitions, 647 flow [2023-08-30 02:36:14,608 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 295 places, 313 transitions, 647 flow [2023-08-30 02:36:14,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 295 places, 313 transitions, 647 flow [2023-08-30 02:36:14,650 INFO L130 PetriNetUnfolder]: 28/362 cut-off events. [2023-08-30 02:36:14,651 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 02:36:14,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 362 events. 28/362 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1503 event pairs, 0 based on Foata normal form. 0/231 useless extension candidates. Maximal degree in co-relation 293. Up to 8 conditions per place. [2023-08-30 02:36:14,678 INFO L119 LiptonReduction]: Number of co-enabled transitions 61272 [2023-08-30 02:36:18,689 INFO L134 LiptonReduction]: Checked pairs total: 183774 [2023-08-30 02:36:18,690 INFO L136 LiptonReduction]: Total number of compositions: 219 [2023-08-30 02:36:18,694 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:36:18,695 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;@63e4ca2b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:36:18,695 INFO L358 AbstractCegarLoop]: Starting to check reachability of 120 error locations. [2023-08-30 02:36:18,696 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-30 02:36:18,696 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:36:18,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:18,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:36:18,697 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 117 more)] === [2023-08-30 02:36:18,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:18,697 INFO L85 PathProgramCache]: Analyzing trace with hash 54412, now seen corresponding path program 1 times [2023-08-30 02:36:18,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:18,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127074916] [2023-08-30 02:36:18,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:18,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:18,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:36:18,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:36:18,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:36:18,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127074916] [2023-08-30 02:36:18,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127074916] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:36:18,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:36:18,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:36:18,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866576636] [2023-08-30 02:36:18,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:36:18,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:36:18,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:36:18,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:36:18,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:36:18,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 532 [2023-08-30 02:36:18,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 161 transitions, 343 flow. Second operand has 3 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:18,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:36:18,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 532 [2023-08-30 02:36:18,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:36:53,186 INFO L130 PetriNetUnfolder]: 322078/467087 cut-off events. [2023-08-30 02:36:53,187 INFO L131 PetriNetUnfolder]: For 7042/7042 co-relation queries the response was YES. [2023-08-30 02:36:54,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 911823 conditions, 467087 events. 322078/467087 cut-off events. For 7042/7042 co-relation queries the response was YES. Maximal size of possible extension queue 16514. Compared 4330814 event pairs, 301270 based on Foata normal form. 0/209966 useless extension candidates. Maximal degree in co-relation 513828. Up to 439908 conditions per place. [2023-08-30 02:36:56,069 INFO L137 encePairwiseOnDemand]: 517/532 looper letters, 106 selfloop transitions, 1 changer transitions 0/141 dead transitions. [2023-08-30 02:36:56,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 141 transitions, 517 flow [2023-08-30 02:36:56,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:36:56,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:36:56,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 844 transitions. [2023-08-30 02:36:56,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288220551378446 [2023-08-30 02:36:56,072 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 844 transitions. [2023-08-30 02:36:56,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 844 transitions. [2023-08-30 02:36:56,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:36:56,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 844 transitions. [2023-08-30 02:36:56,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 281.3333333333333) internal successors, (844), 3 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:56,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:56,083 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:56,084 INFO L175 Difference]: Start difference. First operand has 159 places, 161 transitions, 343 flow. Second operand 3 states and 844 transitions. [2023-08-30 02:36:56,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 141 transitions, 517 flow [2023-08-30 02:36:56,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 141 transitions, 511 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-30 02:36:56,090 INFO L231 Difference]: Finished difference. Result has 144 places, 141 transitions, 299 flow [2023-08-30 02:36:56,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=299, PETRI_PLACES=144, PETRI_TRANSITIONS=141} [2023-08-30 02:36:56,091 INFO L281 CegarLoopForPetriNet]: 159 programPoint places, -15 predicate places. [2023-08-30 02:36:56,092 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 141 transitions, 299 flow [2023-08-30 02:36:56,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:56,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:56,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:36:56,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 02:36:56,093 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 117 more)] === [2023-08-30 02:36:56,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:56,093 INFO L85 PathProgramCache]: Analyzing trace with hash 54411, now seen corresponding path program 1 times [2023-08-30 02:36:56,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:56,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556817704] [2023-08-30 02:36:56,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:56,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:56,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:36:56,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:36:56,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:36:56,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556817704] [2023-08-30 02:36:56,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556817704] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:36:56,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:36:56,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:36:56,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414111764] [2023-08-30 02:36:56,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:36:56,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:36:56,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:36:56,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:36:56,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:36:56,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 532 [2023-08-30 02:36:56,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 141 transitions, 299 flow. Second operand has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:56,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:36:56,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 532 [2023-08-30 02:36:56,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:37:51,445 INFO L130 PetriNetUnfolder]: 510626/758304 cut-off events. [2023-08-30 02:37:51,445 INFO L131 PetriNetUnfolder]: For 6490/6490 co-relation queries the response was YES. [2023-08-30 02:37:52,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1475607 conditions, 758304 events. 510626/758304 cut-off events. For 6490/6490 co-relation queries the response was YES. Maximal size of possible extension queue 19562. Compared 7318649 event pairs, 205346 based on Foata normal form. 0/362434 useless extension candidates. Maximal degree in co-relation 1475598. Up to 413179 conditions per place. [2023-08-30 02:37:56,249 INFO L137 encePairwiseOnDemand]: 523/532 looper letters, 203 selfloop transitions, 8 changer transitions 0/245 dead transitions. [2023-08-30 02:37:56,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 245 transitions, 939 flow [2023-08-30 02:37:56,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:37:56,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:37:56,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 893 transitions. [2023-08-30 02:37:56,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2023-08-30 02:37:56,252 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 893 transitions. [2023-08-30 02:37:56,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 893 transitions. [2023-08-30 02:37:56,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:37:56,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 893 transitions. [2023-08-30 02:37:56,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 297.6666666666667) internal successors, (893), 3 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:37:56,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:37:56,258 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:37:56,258 INFO L175 Difference]: Start difference. First operand has 144 places, 141 transitions, 299 flow. Second operand 3 states and 893 transitions. [2023-08-30 02:37:56,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 245 transitions, 939 flow [2023-08-30 02:37:56,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 245 transitions, 938 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:37:56,264 INFO L231 Difference]: Finished difference. Result has 147 places, 148 transitions, 360 flow [2023-08-30 02:37:56,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=360, PETRI_PLACES=147, PETRI_TRANSITIONS=148} [2023-08-30 02:37:56,265 INFO L281 CegarLoopForPetriNet]: 159 programPoint places, -12 predicate places. [2023-08-30 02:37:56,265 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 148 transitions, 360 flow [2023-08-30 02:37:56,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:37:56,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:37:56,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:37:56,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 02:37:56,266 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 117 more)] === [2023-08-30 02:37:56,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:37:56,267 INFO L85 PathProgramCache]: Analyzing trace with hash 104242534, now seen corresponding path program 1 times [2023-08-30 02:37:56,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:37:56,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282813921] [2023-08-30 02:37:56,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:37:56,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:37:56,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:37:56,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:37:56,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:37:56,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282813921] [2023-08-30 02:37:56,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282813921] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:37:56,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:37:56,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:37:56,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956462754] [2023-08-30 02:37:56,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:37:56,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:37:56,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:37:56,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:37:56,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:37:56,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 532 [2023-08-30 02:37:56,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 148 transitions, 360 flow. Second operand has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:37:56,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:37:56,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 532 [2023-08-30 02:37:56,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:40:01,688 INFO L130 PetriNetUnfolder]: 911835/1328881 cut-off events. [2023-08-30 02:40:01,688 INFO L131 PetriNetUnfolder]: For 406835/406869 co-relation queries the response was YES. [2023-08-30 02:40:05,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2945556 conditions, 1328881 events. 911835/1328881 cut-off events. For 406835/406869 co-relation queries the response was YES. Maximal size of possible extension queue 36987. Compared 13604918 event pairs, 343455 based on Foata normal form. 0/697903 useless extension candidates. Maximal degree in co-relation 2945544. Up to 707112 conditions per place. [2023-08-30 02:40:14,914 INFO L137 encePairwiseOnDemand]: 513/532 looper letters, 201 selfloop transitions, 18 changer transitions 0/251 dead transitions. [2023-08-30 02:40:14,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 251 transitions, 1052 flow [2023-08-30 02:40:14,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:40:14,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:40:14,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 872 transitions. [2023-08-30 02:40:14,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5463659147869674 [2023-08-30 02:40:14,919 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 872 transitions. [2023-08-30 02:40:14,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 872 transitions. [2023-08-30 02:40:14,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:40:14,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 872 transitions. [2023-08-30 02:40:14,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:40:14,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:40:14,930 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:40:14,930 INFO L175 Difference]: Start difference. First operand has 147 places, 148 transitions, 360 flow. Second operand 3 states and 872 transitions. [2023-08-30 02:40:14,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 251 transitions, 1052 flow [2023-08-30 02:40:43,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 251 transitions, 1024 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:40:43,763 INFO L231 Difference]: Finished difference. Result has 149 places, 165 transitions, 516 flow [2023-08-30 02:40:43,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=516, PETRI_PLACES=149, PETRI_TRANSITIONS=165} [2023-08-30 02:40:43,764 INFO L281 CegarLoopForPetriNet]: 159 programPoint places, -10 predicate places. [2023-08-30 02:40:43,764 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 165 transitions, 516 flow [2023-08-30 02:40:43,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:40:43,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:40:43,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:40:43,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 02:40:43,765 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 117 more)] === [2023-08-30 02:40:43,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:40:43,765 INFO L85 PathProgramCache]: Analyzing trace with hash 104242535, now seen corresponding path program 1 times [2023-08-30 02:40:43,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:40:43,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456027471] [2023-08-30 02:40:43,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:40:43,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:40:43,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:40:43,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:40:43,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:40:43,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456027471] [2023-08-30 02:40:43,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456027471] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:40:43,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:40:43,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:40:43,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47996956] [2023-08-30 02:40:43,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:40:43,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 02:40:43,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:40:43,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 02:40:43,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 02:40:44,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 532 [2023-08-30 02:40:44,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 165 transitions, 516 flow. Second operand has 4 states, 4 states have (on average 217.5) internal successors, (870), 4 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:40:44,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:40:44,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 532 [2023-08-30 02:40:44,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand