./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread/queue_longer.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/queue_longer.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 9f874a9872f93f025fac23ebed37f94a1f3b80bd0133ea4d7e298577c4fec427 --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 02:06:16,770 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 02:06:16,772 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 02:06:16,794 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 02:06:16,795 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 02:06:16,796 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 02:06:16,797 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 02:06:16,798 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 02:06:16,800 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 02:06:16,801 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 02:06:16,802 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 02:06:16,803 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 02:06:16,803 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 02:06:16,804 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 02:06:16,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 02:06:16,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 02:06:16,807 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 02:06:16,807 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 02:06:16,809 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 02:06:16,810 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 02:06:16,811 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 02:06:16,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 02:06:16,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 02:06:16,814 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 02:06:16,817 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 02:06:16,817 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 02:06:16,817 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 02:06:16,818 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 02:06:16,818 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 02:06:16,819 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 02:06:16,819 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 02:06:16,820 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 02:06:16,821 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 02:06:16,826 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 02:06:16,827 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 02:06:16,828 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 02:06:16,828 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 02:06:16,828 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 02:06:16,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 02:06:16,830 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 02:06:16,830 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 02:06:16,841 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 02:06:16,862 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 02:06:16,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 02:06:16,863 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 02:06:16,863 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 02:06:16,864 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 02:06:16,864 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 02:06:16,865 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 02:06:16,865 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 02:06:16,865 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 02:06:16,866 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 02:06:16,866 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 02:06:16,866 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 02:06:16,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 02:06:16,867 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 02:06:16,867 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 02:06:16,867 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 02:06:16,868 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 02:06:16,868 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 02:06:16,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 02:06:16,869 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 02:06:16,869 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 02:06:16,869 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 02:06:16,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 02:06:16,870 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 02:06:16,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 02:06:16,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 02:06:16,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 02:06:16,871 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 02:06:16,871 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 02:06:16,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 02:06:16,872 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 02:06:16,872 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 02:06:16,872 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 02:06:16,872 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 02:06:16,873 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f874a9872f93f025fac23ebed37f94a1f3b80bd0133ea4d7e298577c4fec427 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 02:06:17,191 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 02:06:17,214 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 02:06:17,217 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 02:06:17,218 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 02:06:17,218 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 02:06:17,219 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/queue_longer.i [2023-08-30 02:06:18,477 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 02:06:18,787 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 02:06:18,787 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_longer.i [2023-08-30 02:06:18,804 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b09467c8/e5abc05228734c8ea0a0694069a7efe7/FLAGa44c42249 [2023-08-30 02:06:18,820 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b09467c8/e5abc05228734c8ea0a0694069a7efe7 [2023-08-30 02:06:18,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 02:06:18,823 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 02:06:18,824 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 02:06:18,824 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 02:06:18,832 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 02:06:18,833 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:06:18" (1/1) ... [2023-08-30 02:06:18,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b52b09b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:06:18, skipping insertion in model container [2023-08-30 02:06:18,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:06:18" (1/1) ... [2023-08-30 02:06:18,841 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 02:06:18,890 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 02:06:19,279 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/queue_longer.i[43296,43309] [2023-08-30 02:06:19,288 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/queue_longer.i[43503,43516] [2023-08-30 02:06:19,294 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/queue_longer.i[43783,43796] [2023-08-30 02:06:19,303 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 02:06:19,318 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 02:06:19,377 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/queue_longer.i[43296,43309] [2023-08-30 02:06:19,380 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/queue_longer.i[43503,43516] [2023-08-30 02:06:19,386 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/queue_longer.i[43783,43796] [2023-08-30 02:06:19,394 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 02:06:19,463 INFO L208 MainTranslator]: Completed translation [2023-08-30 02:06:19,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:06:19 WrapperNode [2023-08-30 02:06:19,464 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 02:06:19,465 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 02:06:19,465 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 02:06:19,465 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 02:06:19,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:06:19" (1/1) ... [2023-08-30 02:06:19,506 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:06:19" (1/1) ... [2023-08-30 02:06:19,550 INFO L138 Inliner]: procedures = 274, calls = 60, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 243 [2023-08-30 02:06:19,551 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 02:06:19,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 02:06:19,553 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 02:06:19,553 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 02:06:19,561 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:06:19" (1/1) ... [2023-08-30 02:06:19,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:06:19" (1/1) ... [2023-08-30 02:06:19,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:06:19" (1/1) ... [2023-08-30 02:06:19,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:06:19" (1/1) ... [2023-08-30 02:06:19,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:06:19" (1/1) ... [2023-08-30 02:06:19,600 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:06:19" (1/1) ... [2023-08-30 02:06:19,604 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:06:19" (1/1) ... [2023-08-30 02:06:19,609 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:06:19" (1/1) ... [2023-08-30 02:06:19,612 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 02:06:19,616 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 02:06:19,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 02:06:19,617 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 02:06:19,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:06:19" (1/1) ... [2023-08-30 02:06:19,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 02:06:19,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:06:19,649 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 02:06:19,673 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 02:06:19,687 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-30 02:06:19,687 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-30 02:06:19,688 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-30 02:06:19,688 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-30 02:06:19,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 02:06:19,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 02:06:19,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 02:06:19,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 02:06:19,689 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 02:06:19,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 02:06:19,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 02:06:19,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 02:06:19,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 02:06:19,701 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 02:06:19,847 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 02:06:19,851 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 02:06:20,380 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 02:06:20,389 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 02:06:20,390 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 02:06:20,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:06:20 BoogieIcfgContainer [2023-08-30 02:06:20,393 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 02:06:20,397 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 02:06:20,397 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 02:06:20,400 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 02:06:20,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 02:06:18" (1/3) ... [2023-08-30 02:06:20,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f6e797e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:06:20, skipping insertion in model container [2023-08-30 02:06:20,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:06:19" (2/3) ... [2023-08-30 02:06:20,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f6e797e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:06:20, skipping insertion in model container [2023-08-30 02:06:20,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:06:20" (3/3) ... [2023-08-30 02:06:20,403 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_longer.i [2023-08-30 02:06:20,418 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 02:06:20,418 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 80 error locations. [2023-08-30 02:06:20,418 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 02:06:20,570 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 02:06:20,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 330 places, 338 transitions, 692 flow [2023-08-30 02:06:20,763 INFO L130 PetriNetUnfolder]: 15/336 cut-off events. [2023-08-30 02:06:20,763 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 02:06:20,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 336 events. 15/336 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 755 event pairs, 0 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 245. Up to 2 conditions per place. [2023-08-30 02:06:20,775 INFO L82 GeneralOperation]: Start removeDead. Operand has 330 places, 338 transitions, 692 flow [2023-08-30 02:06:20,788 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 324 places, 332 transitions, 676 flow [2023-08-30 02:06:20,792 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:06:20,810 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 324 places, 332 transitions, 676 flow [2023-08-30 02:06:20,828 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 324 places, 332 transitions, 676 flow [2023-08-30 02:06:20,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 324 places, 332 transitions, 676 flow [2023-08-30 02:06:20,882 INFO L130 PetriNetUnfolder]: 15/332 cut-off events. [2023-08-30 02:06:20,882 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 02:06:20,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341 conditions, 332 events. 15/332 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 741 event pairs, 0 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 245. Up to 2 conditions per place. [2023-08-30 02:06:20,899 INFO L119 LiptonReduction]: Number of co-enabled transitions 28780 [2023-08-30 02:06:33,788 INFO L134 LiptonReduction]: Checked pairs total: 105796 [2023-08-30 02:06:33,788 INFO L136 LiptonReduction]: Total number of compositions: 415 [2023-08-30 02:06:33,801 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:06:33,806 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;@68f176ff, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:06:33,806 INFO L358 AbstractCegarLoop]: Starting to check reachability of 142 error locations. [2023-08-30 02:06:33,808 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-30 02:06:33,808 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:06:33,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:33,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 02:06:33,809 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:33,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:33,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1407, now seen corresponding path program 1 times [2023-08-30 02:06:33,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:33,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741218494] [2023-08-30 02:06:33,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:33,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:33,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:33,907 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 02:06:33,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:33,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741218494] [2023-08-30 02:06:33,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741218494] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:33,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:33,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 02:06:33,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655752524] [2023-08-30 02:06:33,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:33,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 02:06:33,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:33,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 02:06:33,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 02:06:33,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 753 [2023-08-30 02:06:33,955 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 142 transitions, 296 flow. Second operand has 2 states, 2 states have (on average 325.5) internal successors, (651), 2 states have internal predecessors, (651), 0 states have call successors, (0), 0 states 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 02:06:33,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:33,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 753 [2023-08-30 02:06:33,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:35,054 INFO L130 PetriNetUnfolder]: 7123/11650 cut-off events. [2023-08-30 02:06:35,054 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2023-08-30 02:06:35,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22548 conditions, 11650 events. 7123/11650 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 70134 event pairs, 6167 based on Foata normal form. 88/6498 useless extension candidates. Maximal degree in co-relation 22160. Up to 10787 conditions per place. [2023-08-30 02:06:35,127 INFO L137 encePairwiseOnDemand]: 704/753 looper letters, 82 selfloop transitions, 0 changer transitions 0/93 dead transitions. [2023-08-30 02:06:35,128 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 93 transitions, 362 flow [2023-08-30 02:06:35,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 02:06:35,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 02:06:35,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 781 transitions. [2023-08-30 02:06:35,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185922974767596 [2023-08-30 02:06:35,144 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 781 transitions. [2023-08-30 02:06:35,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 781 transitions. [2023-08-30 02:06:35,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:35,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 781 transitions. [2023-08-30 02:06:35,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 390.5) internal successors, (781), 2 states have internal predecessors, (781), 0 states have call successors, (0), 0 states 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 02:06:35,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 753.0) internal successors, (2259), 3 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states 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 02:06:35,166 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 753.0) internal successors, (2259), 3 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states 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 02:06:35,167 INFO L175 Difference]: Start difference. First operand has 139 places, 142 transitions, 296 flow. Second operand 2 states and 781 transitions. [2023-08-30 02:06:35,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 93 transitions, 362 flow [2023-08-30 02:06:35,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 354 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 02:06:35,178 INFO L231 Difference]: Finished difference. Result has 89 places, 93 transitions, 190 flow [2023-08-30 02:06:35,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=190, PETRI_PLACES=89, PETRI_TRANSITIONS=93} [2023-08-30 02:06:35,183 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -50 predicate places. [2023-08-30 02:06:35,183 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 93 transitions, 190 flow [2023-08-30 02:06:35,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 325.5) internal successors, (651), 2 states have internal predecessors, (651), 0 states have call successors, (0), 0 states 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 02:06:35,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:35,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 02:06:35,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 02:06:35,185 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:35,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:35,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1397048, now seen corresponding path program 1 times [2023-08-30 02:06:35,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:35,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077096840] [2023-08-30 02:06:35,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:35,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:35,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:35,547 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 02:06:35,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:35,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077096840] [2023-08-30 02:06:35,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077096840] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:35,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:35,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:06:35,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300342514] [2023-08-30 02:06:35,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:35,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:06:35,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:35,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:06:35,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:06:35,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 753 [2023-08-30 02:06:35,708 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 93 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 323.0) internal successors, (969), 3 states have internal predecessors, (969), 0 states have call successors, (0), 0 states 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 02:06:35,708 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:35,708 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 753 [2023-08-30 02:06:35,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:36,576 INFO L130 PetriNetUnfolder]: 6353/10400 cut-off events. [2023-08-30 02:06:36,577 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 02:06:36,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20043 conditions, 10400 events. 6353/10400 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 61482 event pairs, 5453 based on Foata normal form. 0/5972 useless extension candidates. Maximal degree in co-relation 20040. Up to 9599 conditions per place. [2023-08-30 02:06:36,642 INFO L137 encePairwiseOnDemand]: 747/753 looper letters, 76 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2023-08-30 02:06:36,642 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 89 transitions, 338 flow [2023-08-30 02:06:36,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:06:36,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:06:36,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1048 transitions. [2023-08-30 02:06:36,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4639220894200974 [2023-08-30 02:06:36,647 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1048 transitions. [2023-08-30 02:06:36,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1048 transitions. [2023-08-30 02:06:36,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:36,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1048 transitions. [2023-08-30 02:06:36,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 349.3333333333333) internal successors, (1048), 3 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states 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 02:06:36,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:06:36,656 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:06:36,656 INFO L175 Difference]: Start difference. First operand has 89 places, 93 transitions, 190 flow. Second operand 3 states and 1048 transitions. [2023-08-30 02:06:36,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 89 transitions, 338 flow [2023-08-30 02:06:36,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 89 transitions, 338 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:06:36,659 INFO L231 Difference]: Finished difference. Result has 87 places, 89 transitions, 186 flow [2023-08-30 02:06:36,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=87, PETRI_TRANSITIONS=89} [2023-08-30 02:06:36,660 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -52 predicate places. [2023-08-30 02:06:36,661 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 89 transitions, 186 flow [2023-08-30 02:06:36,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 323.0) internal successors, (969), 3 states have internal predecessors, (969), 0 states have call successors, (0), 0 states 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 02:06:36,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:36,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 02:06:36,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 02:06:36,662 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:36,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:36,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1397046, now seen corresponding path program 1 times [2023-08-30 02:06:36,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:36,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994256666] [2023-08-30 02:06:36,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:36,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:36,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:36,896 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 02:06:36,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:36,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994256666] [2023-08-30 02:06:36,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994256666] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:36,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:36,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:06:36,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588708] [2023-08-30 02:06:36,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:36,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:06:36,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:36,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:06:36,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:06:37,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 753 [2023-08-30 02:06:37,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 89 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 324.0) internal successors, (972), 3 states have internal predecessors, (972), 0 states have call successors, (0), 0 states 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 02:06:37,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:37,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 753 [2023-08-30 02:06:37,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:37,831 INFO L130 PetriNetUnfolder]: 5480/8975 cut-off events. [2023-08-30 02:06:37,831 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 02:06:37,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17272 conditions, 8975 events. 5480/8975 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 51571 event pairs, 4648 based on Foata normal form. 0/5447 useless extension candidates. Maximal degree in co-relation 17268. Up to 8255 conditions per place. [2023-08-30 02:06:37,874 INFO L137 encePairwiseOnDemand]: 747/753 looper letters, 72 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2023-08-30 02:06:37,874 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 84 transitions, 322 flow [2023-08-30 02:06:37,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:06:37,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:06:37,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1047 transitions. [2023-08-30 02:06:37,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634794156706507 [2023-08-30 02:06:37,878 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1047 transitions. [2023-08-30 02:06:37,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1047 transitions. [2023-08-30 02:06:37,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:37,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1047 transitions. [2023-08-30 02:06:37,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 349.0) internal successors, (1047), 3 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states 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 02:06:37,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:06:37,886 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:06:37,887 INFO L175 Difference]: Start difference. First operand has 87 places, 89 transitions, 186 flow. Second operand 3 states and 1047 transitions. [2023-08-30 02:06:37,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 84 transitions, 322 flow [2023-08-30 02:06:37,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 84 transitions, 318 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:06:37,891 INFO L231 Difference]: Finished difference. Result has 82 places, 84 transitions, 174 flow [2023-08-30 02:06:37,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=82, PETRI_TRANSITIONS=84} [2023-08-30 02:06:37,892 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -57 predicate places. [2023-08-30 02:06:37,893 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 84 transitions, 174 flow [2023-08-30 02:06:37,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 324.0) internal successors, (972), 3 states have internal predecessors, (972), 0 states have call successors, (0), 0 states 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 02:06:37,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:37,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 02:06:37,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 02:06:37,894 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:37,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:37,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1396972, now seen corresponding path program 1 times [2023-08-30 02:06:37,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:37,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733896371] [2023-08-30 02:06:37,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:37,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:37,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:37,949 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 02:06:37,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:37,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733896371] [2023-08-30 02:06:37,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733896371] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:37,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:37,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:06:37,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299156326] [2023-08-30 02:06:37,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:37,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:06:37,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:37,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:06:37,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:06:38,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 753 [2023-08-30 02:06:38,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 84 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 317.0) internal successors, (951), 3 states have internal predecessors, (951), 0 states have call successors, (0), 0 states 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 02:06:38,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:38,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 753 [2023-08-30 02:06:38,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:38,704 INFO L130 PetriNetUnfolder]: 5420/8856 cut-off events. [2023-08-30 02:06:38,705 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 02:06:38,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17039 conditions, 8856 events. 5420/8856 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 50619 event pairs, 4596 based on Foata normal form. 0/5402 useless extension candidates. Maximal degree in co-relation 17035. Up to 8141 conditions per place. [2023-08-30 02:06:38,754 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 69 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-08-30 02:06:38,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 82 transitions, 312 flow [2023-08-30 02:06:38,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:06:38,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:06:38,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1021 transitions. [2023-08-30 02:06:38,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45196989818503763 [2023-08-30 02:06:38,758 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1021 transitions. [2023-08-30 02:06:38,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1021 transitions. [2023-08-30 02:06:38,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:38,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1021 transitions. [2023-08-30 02:06:38,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 340.3333333333333) internal successors, (1021), 3 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states 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 02:06:38,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:06:38,771 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:06:38,771 INFO L175 Difference]: Start difference. First operand has 82 places, 84 transitions, 174 flow. Second operand 3 states and 1021 transitions. [2023-08-30 02:06:38,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 82 transitions, 312 flow [2023-08-30 02:06:38,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 82 transitions, 311 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:06:38,774 INFO L231 Difference]: Finished difference. Result has 81 places, 82 transitions, 173 flow [2023-08-30 02:06:38,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=173, PETRI_PLACES=81, PETRI_TRANSITIONS=82} [2023-08-30 02:06:38,776 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -58 predicate places. [2023-08-30 02:06:38,777 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 82 transitions, 173 flow [2023-08-30 02:06:38,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 317.0) internal successors, (951), 3 states have internal predecessors, (951), 0 states have call successors, (0), 0 states 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 02:06:38,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:38,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 02:06:38,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 02:06:38,778 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:38,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:38,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1396973, now seen corresponding path program 1 times [2023-08-30 02:06:38,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:38,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821361506] [2023-08-30 02:06:38,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:38,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:38,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:38,866 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 02:06:38,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:38,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821361506] [2023-08-30 02:06:38,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821361506] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:38,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:38,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:06:38,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600007604] [2023-08-30 02:06:38,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:38,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:06:38,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:38,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:06:38,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:06:38,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 753 [2023-08-30 02:06:38,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 82 transitions, 173 flow. Second operand has 3 states, 3 states have (on average 321.0) internal successors, (963), 3 states have internal predecessors, (963), 0 states have call successors, (0), 0 states 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 02:06:38,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:38,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 753 [2023-08-30 02:06:38,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:39,616 INFO L130 PetriNetUnfolder]: 5360/8737 cut-off events. [2023-08-30 02:06:39,617 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 02:06:39,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16809 conditions, 8737 events. 5360/8737 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 49680 event pairs, 4544 based on Foata normal form. 0/5357 useless extension candidates. Maximal degree in co-relation 16805. Up to 8028 conditions per place. [2023-08-30 02:06:39,666 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 67 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-08-30 02:06:39,666 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 80 transitions, 307 flow [2023-08-30 02:06:39,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:06:39,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:06:39,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1031 transitions. [2023-08-30 02:06:39,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563966356795042 [2023-08-30 02:06:39,670 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1031 transitions. [2023-08-30 02:06:39,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1031 transitions. [2023-08-30 02:06:39,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:39,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1031 transitions. [2023-08-30 02:06:39,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 343.6666666666667) internal successors, (1031), 3 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states 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 02:06:39,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:06:39,679 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:06:39,679 INFO L175 Difference]: Start difference. First operand has 81 places, 82 transitions, 173 flow. Second operand 3 states and 1031 transitions. [2023-08-30 02:06:39,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 80 transitions, 307 flow [2023-08-30 02:06:39,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 80 transitions, 303 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:06:39,684 INFO L231 Difference]: Finished difference. Result has 79 places, 80 transitions, 169 flow [2023-08-30 02:06:39,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=79, PETRI_TRANSITIONS=80} [2023-08-30 02:06:39,686 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -60 predicate places. [2023-08-30 02:06:39,686 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 80 transitions, 169 flow [2023-08-30 02:06:39,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 321.0) internal successors, (963), 3 states have internal predecessors, (963), 0 states have call successors, (0), 0 states 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 02:06:39,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:39,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 02:06:39,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 02:06:39,688 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:39,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:39,688 INFO L85 PathProgramCache]: Analyzing trace with hash 43308809, now seen corresponding path program 1 times [2023-08-30 02:06:39,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:39,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083037771] [2023-08-30 02:06:39,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:39,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:39,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:40,043 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 02:06:40,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:40,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083037771] [2023-08-30 02:06:40,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083037771] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:40,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:40,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:06:40,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90090000] [2023-08-30 02:06:40,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:40,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 02:06:40,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:40,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 02:06:40,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 02:06:40,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 753 [2023-08-30 02:06:40,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 80 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states 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 02:06:40,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:40,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 753 [2023-08-30 02:06:40,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:41,034 INFO L130 PetriNetUnfolder]: 5645/9113 cut-off events. [2023-08-30 02:06:41,034 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 02:06:41,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17623 conditions, 9113 events. 5645/9113 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 51051 event pairs, 4618 based on Foata normal form. 0/5451 useless extension candidates. Maximal degree in co-relation 17619. Up to 8462 conditions per place. [2023-08-30 02:06:41,090 INFO L137 encePairwiseOnDemand]: 747/753 looper letters, 71 selfloop transitions, 6 changer transitions 0/86 dead transitions. [2023-08-30 02:06:41,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 86 transitions, 335 flow [2023-08-30 02:06:41,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 02:06:41,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 02:06:41,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1306 transitions. [2023-08-30 02:06:41,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43359893758300133 [2023-08-30 02:06:41,096 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1306 transitions. [2023-08-30 02:06:41,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1306 transitions. [2023-08-30 02:06:41,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:41,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1306 transitions. [2023-08-30 02:06:41,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 326.5) internal successors, (1306), 4 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states 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 02:06:41,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states 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 02:06:41,107 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states 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 02:06:41,107 INFO L175 Difference]: Start difference. First operand has 79 places, 80 transitions, 169 flow. Second operand 4 states and 1306 transitions. [2023-08-30 02:06:41,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 86 transitions, 335 flow [2023-08-30 02:06:41,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 86 transitions, 331 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:06:41,109 INFO L231 Difference]: Finished difference. Result has 82 places, 85 transitions, 204 flow [2023-08-30 02:06:41,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=204, PETRI_PLACES=82, PETRI_TRANSITIONS=85} [2023-08-30 02:06:41,112 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -57 predicate places. [2023-08-30 02:06:41,112 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 85 transitions, 204 flow [2023-08-30 02:06:41,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states 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 02:06:41,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:41,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 02:06:41,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 02:06:41,116 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:41,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:41,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1342574226, now seen corresponding path program 1 times [2023-08-30 02:06:41,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:41,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324350478] [2023-08-30 02:06:41,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:41,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:41,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:41,313 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 02:06:41,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:41,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324350478] [2023-08-30 02:06:41,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324350478] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:41,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:41,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:06:41,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210063214] [2023-08-30 02:06:41,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:41,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 02:06:41,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:41,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 02:06:41,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 02:06:41,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 753 [2023-08-30 02:06:41,715 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 85 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 303.0) internal successors, (1515), 5 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states 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 02:06:41,715 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:41,715 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 753 [2023-08-30 02:06:41,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:42,439 INFO L130 PetriNetUnfolder]: 4666/7530 cut-off events. [2023-08-30 02:06:42,439 INFO L131 PetriNetUnfolder]: For 106/106 co-relation queries the response was YES. [2023-08-30 02:06:42,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14881 conditions, 7530 events. 4666/7530 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 41926 event pairs, 54 based on Foata normal form. 156/4886 useless extension candidates. Maximal degree in co-relation 14875. Up to 6684 conditions per place. [2023-08-30 02:06:42,476 INFO L137 encePairwiseOnDemand]: 745/753 looper letters, 112 selfloop transitions, 5 changer transitions 0/129 dead transitions. [2023-08-30 02:06:42,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 129 transitions, 526 flow [2023-08-30 02:06:42,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 02:06:42,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 02:06:42,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1629 transitions. [2023-08-30 02:06:42,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43266932270916336 [2023-08-30 02:06:42,481 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1629 transitions. [2023-08-30 02:06:42,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1629 transitions. [2023-08-30 02:06:42,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:42,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1629 transitions. [2023-08-30 02:06:42,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 325.8) internal successors, (1629), 5 states have internal predecessors, (1629), 0 states have call successors, (0), 0 states 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 02:06:42,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 753.0) internal successors, (4518), 6 states have internal predecessors, (4518), 0 states have call successors, (0), 0 states 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 02:06:42,493 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 753.0) internal successors, (4518), 6 states have internal predecessors, (4518), 0 states have call successors, (0), 0 states 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 02:06:42,493 INFO L175 Difference]: Start difference. First operand has 82 places, 85 transitions, 204 flow. Second operand 5 states and 1629 transitions. [2023-08-30 02:06:42,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 129 transitions, 526 flow [2023-08-30 02:06:42,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 129 transitions, 526 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:06:42,498 INFO L231 Difference]: Finished difference. Result has 82 places, 80 transitions, 199 flow [2023-08-30 02:06:42,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=199, PETRI_PLACES=82, PETRI_TRANSITIONS=80} [2023-08-30 02:06:42,499 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -57 predicate places. [2023-08-30 02:06:42,499 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 80 transitions, 199 flow [2023-08-30 02:06:42,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 303.0) internal successors, (1515), 5 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states 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 02:06:42,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:42,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 02:06:42,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 02:06:42,501 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:42,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:42,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1342534681, now seen corresponding path program 1 times [2023-08-30 02:06:42,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:42,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154383698] [2023-08-30 02:06:42,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:42,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:42,915 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 02:06:42,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:42,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154383698] [2023-08-30 02:06:42,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154383698] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:42,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:42,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:06:42,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440729395] [2023-08-30 02:06:42,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:42,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 02:06:42,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:42,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 02:06:42,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 02:06:43,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 753 [2023-08-30 02:06:43,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 80 transitions, 199 flow. Second operand has 5 states, 5 states have (on average 304.0) internal successors, (1520), 5 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 02:06:43,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:43,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 753 [2023-08-30 02:06:43,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:44,062 INFO L130 PetriNetUnfolder]: 5287/8530 cut-off events. [2023-08-30 02:06:44,062 INFO L131 PetriNetUnfolder]: For 742/742 co-relation queries the response was YES. [2023-08-30 02:06:44,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17148 conditions, 8530 events. 5287/8530 cut-off events. For 742/742 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 48081 event pairs, 1010 based on Foata normal form. 45/5468 useless extension candidates. Maximal degree in co-relation 17141. Up to 7592 conditions per place. [2023-08-30 02:06:44,109 INFO L137 encePairwiseOnDemand]: 748/753 looper letters, 99 selfloop transitions, 7 changer transitions 0/115 dead transitions. [2023-08-30 02:06:44,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 115 transitions, 491 flow [2023-08-30 02:06:44,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 02:06:44,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 02:06:44,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1317 transitions. [2023-08-30 02:06:44,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43725099601593626 [2023-08-30 02:06:44,114 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1317 transitions. [2023-08-30 02:06:44,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1317 transitions. [2023-08-30 02:06:44,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:44,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1317 transitions. [2023-08-30 02:06:44,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 329.25) internal successors, (1317), 4 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states 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 02:06:44,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states 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 02:06:44,122 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states 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 02:06:44,122 INFO L175 Difference]: Start difference. First operand has 82 places, 80 transitions, 199 flow. Second operand 4 states and 1317 transitions. [2023-08-30 02:06:44,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 115 transitions, 491 flow [2023-08-30 02:06:44,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 115 transitions, 480 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 02:06:44,126 INFO L231 Difference]: Finished difference. Result has 84 places, 84 transitions, 234 flow [2023-08-30 02:06:44,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=234, PETRI_PLACES=84, PETRI_TRANSITIONS=84} [2023-08-30 02:06:44,127 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -55 predicate places. [2023-08-30 02:06:44,127 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 84 transitions, 234 flow [2023-08-30 02:06:44,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 304.0) internal successors, (1520), 5 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 02:06:44,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:44,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 02:06:44,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 02:06:44,128 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:44,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:44,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1342523318, now seen corresponding path program 1 times [2023-08-30 02:06:44,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:44,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919595310] [2023-08-30 02:06:44,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:44,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:44,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:44,205 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 02:06:44,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:44,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919595310] [2023-08-30 02:06:44,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919595310] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:44,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:44,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:06:44,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958679329] [2023-08-30 02:06:44,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:44,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 02:06:44,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:44,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 02:06:44,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 02:06:44,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 753 [2023-08-30 02:06:44,422 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 84 transitions, 234 flow. Second operand has 4 states, 4 states have (on average 319.25) internal successors, (1277), 4 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states 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 02:06:44,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:44,422 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 753 [2023-08-30 02:06:44,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:44,808 INFO L130 PetriNetUnfolder]: 3673/6134 cut-off events. [2023-08-30 02:06:44,808 INFO L131 PetriNetUnfolder]: For 620/620 co-relation queries the response was YES. [2023-08-30 02:06:44,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12413 conditions, 6134 events. 3673/6134 cut-off events. For 620/620 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 33875 event pairs, 2958 based on Foata normal form. 0/4268 useless extension candidates. Maximal degree in co-relation 12404. Up to 5601 conditions per place. [2023-08-30 02:06:44,836 INFO L137 encePairwiseOnDemand]: 750/753 looper letters, 68 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-08-30 02:06:44,836 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 83 transitions, 372 flow [2023-08-30 02:06:44,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:06:44,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:06:44,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1019 transitions. [2023-08-30 02:06:44,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45108455068614434 [2023-08-30 02:06:44,839 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1019 transitions. [2023-08-30 02:06:44,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1019 transitions. [2023-08-30 02:06:44,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:44,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1019 transitions. [2023-08-30 02:06:44,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 339.6666666666667) internal successors, (1019), 3 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states 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 02:06:44,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:06:44,846 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:06:44,846 INFO L175 Difference]: Start difference. First operand has 84 places, 84 transitions, 234 flow. Second operand 3 states and 1019 transitions. [2023-08-30 02:06:44,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 83 transitions, 372 flow [2023-08-30 02:06:44,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 83 transitions, 366 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-30 02:06:44,849 INFO L231 Difference]: Finished difference. Result has 85 places, 83 transitions, 230 flow [2023-08-30 02:06:44,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=230, PETRI_PLACES=85, PETRI_TRANSITIONS=83} [2023-08-30 02:06:44,850 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -54 predicate places. [2023-08-30 02:06:44,850 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 83 transitions, 230 flow [2023-08-30 02:06:44,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 319.25) internal successors, (1277), 4 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states 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 02:06:44,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:44,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 02:06:44,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 02:06:44,851 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:44,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:44,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1342523317, now seen corresponding path program 1 times [2023-08-30 02:06:44,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:44,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960149780] [2023-08-30 02:06:44,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:44,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:44,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:44,900 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 02:06:44,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:44,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960149780] [2023-08-30 02:06:44,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960149780] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:44,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:44,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:06:44,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475623799] [2023-08-30 02:06:44,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:44,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 02:06:44,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:44,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 02:06:44,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 02:06:45,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 753 [2023-08-30 02:06:45,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 83 transitions, 230 flow. Second operand has 4 states, 4 states have (on average 313.25) internal successors, (1253), 4 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states 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 02:06:45,113 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:45,113 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 753 [2023-08-30 02:06:45,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:45,418 INFO L130 PetriNetUnfolder]: 2274/3952 cut-off events. [2023-08-30 02:06:45,418 INFO L131 PetriNetUnfolder]: For 286/286 co-relation queries the response was YES. [2023-08-30 02:06:45,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7958 conditions, 3952 events. 2274/3952 cut-off events. For 286/286 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 21066 event pairs, 1782 based on Foata normal form. 0/3121 useless extension candidates. Maximal degree in co-relation 7948. Up to 3592 conditions per place. [2023-08-30 02:06:45,436 INFO L137 encePairwiseOnDemand]: 750/753 looper letters, 67 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-08-30 02:06:45,436 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 82 transitions, 366 flow [2023-08-30 02:06:45,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:06:45,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:06:45,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1000 transitions. [2023-08-30 02:06:45,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4426737494466578 [2023-08-30 02:06:45,439 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1000 transitions. [2023-08-30 02:06:45,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1000 transitions. [2023-08-30 02:06:45,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:45,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1000 transitions. [2023-08-30 02:06:45,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 333.3333333333333) internal successors, (1000), 3 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:06:45,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:06:45,445 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:06:45,445 INFO L175 Difference]: Start difference. First operand has 85 places, 83 transitions, 230 flow. Second operand 3 states and 1000 transitions. [2023-08-30 02:06:45,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 82 transitions, 366 flow [2023-08-30 02:06:45,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 82 transitions, 362 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:06:45,448 INFO L231 Difference]: Finished difference. Result has 84 places, 82 transitions, 228 flow [2023-08-30 02:06:45,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=84, PETRI_TRANSITIONS=82} [2023-08-30 02:06:45,448 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -55 predicate places. [2023-08-30 02:06:45,448 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 82 transitions, 228 flow [2023-08-30 02:06:45,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 313.25) internal successors, (1253), 4 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states 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 02:06:45,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:45,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:06:45,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 02:06:45,449 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:45,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:45,450 INFO L85 PathProgramCache]: Analyzing trace with hash 379604633, now seen corresponding path program 1 times [2023-08-30 02:06:45,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:45,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544870619] [2023-08-30 02:06:45,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:45,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:45,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:45,491 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 02:06:45,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:45,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544870619] [2023-08-30 02:06:45,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544870619] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:45,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:45,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:06:45,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074221228] [2023-08-30 02:06:45,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:45,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:06:45,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:45,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:06:45,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:06:45,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 753 [2023-08-30 02:06:45,501 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 82 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 322.6666666666667) internal successors, (968), 3 states have internal predecessors, (968), 0 states have call successors, (0), 0 states 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 02:06:45,501 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:45,501 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 753 [2023-08-30 02:06:45,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:45,754 INFO L130 PetriNetUnfolder]: 1588/2752 cut-off events. [2023-08-30 02:06:45,755 INFO L131 PetriNetUnfolder]: For 132/132 co-relation queries the response was YES. [2023-08-30 02:06:45,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5517 conditions, 2752 events. 1588/2752 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 11918 event pairs, 763 based on Foata normal form. 62/2200 useless extension candidates. Maximal degree in co-relation 5507. Up to 1688 conditions per place. [2023-08-30 02:06:45,768 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 91 selfloop transitions, 3 changer transitions 0/105 dead transitions. [2023-08-30 02:06:45,768 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 105 transitions, 456 flow [2023-08-30 02:06:45,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:06:45,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:06:45,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1052 transitions. [2023-08-30 02:06:45,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46569278441788403 [2023-08-30 02:06:45,771 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1052 transitions. [2023-08-30 02:06:45,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1052 transitions. [2023-08-30 02:06:45,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:45,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1052 transitions. [2023-08-30 02:06:45,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 350.6666666666667) internal successors, (1052), 3 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states 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 02:06:45,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:06:45,777 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:06:45,777 INFO L175 Difference]: Start difference. First operand has 84 places, 82 transitions, 228 flow. Second operand 3 states and 1052 transitions. [2023-08-30 02:06:45,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 105 transitions, 456 flow [2023-08-30 02:06:45,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 105 transitions, 431 flow, removed 1 selfloop flow, removed 7 redundant places. [2023-08-30 02:06:45,781 INFO L231 Difference]: Finished difference. Result has 79 places, 78 transitions, 197 flow [2023-08-30 02:06:45,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=79, PETRI_TRANSITIONS=78} [2023-08-30 02:06:45,782 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -60 predicate places. [2023-08-30 02:06:45,782 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 78 transitions, 197 flow [2023-08-30 02:06:45,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 322.6666666666667) internal successors, (968), 3 states have internal predecessors, (968), 0 states have call successors, (0), 0 states 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 02:06:45,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:45,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:06:45,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 02:06:45,783 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:45,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:45,783 INFO L85 PathProgramCache]: Analyzing trace with hash 236453580, now seen corresponding path program 1 times [2023-08-30 02:06:45,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:45,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318978937] [2023-08-30 02:06:45,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:45,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:45,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:45,930 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 02:06:45,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:45,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318978937] [2023-08-30 02:06:45,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318978937] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:45,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:45,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:06:45,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118996351] [2023-08-30 02:06:45,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:45,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:06:45,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:45,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:06:45,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:06:46,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 753 [2023-08-30 02:06:46,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 197 flow. Second operand has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 0 states have call successors, (0), 0 states 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 02:06:46,062 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:46,062 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 753 [2023-08-30 02:06:46,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:46,272 INFO L130 PetriNetUnfolder]: 1451/2557 cut-off events. [2023-08-30 02:06:46,272 INFO L131 PetriNetUnfolder]: For 124/124 co-relation queries the response was YES. [2023-08-30 02:06:46,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5124 conditions, 2557 events. 1451/2557 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 11033 event pairs, 1098 based on Foata normal form. 0/2017 useless extension candidates. Maximal degree in co-relation 5116. Up to 2344 conditions per place. [2023-08-30 02:06:46,284 INFO L137 encePairwiseOnDemand]: 748/753 looper letters, 61 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-08-30 02:06:46,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 75 transitions, 317 flow [2023-08-30 02:06:46,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:06:46,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:06:46,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1011 transitions. [2023-08-30 02:06:46,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44754316069057104 [2023-08-30 02:06:46,287 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1011 transitions. [2023-08-30 02:06:46,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1011 transitions. [2023-08-30 02:06:46,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:46,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1011 transitions. [2023-08-30 02:06:46,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 337.0) internal successors, (1011), 3 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states 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 02:06:46,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:06:46,293 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:06:46,293 INFO L175 Difference]: Start difference. First operand has 79 places, 78 transitions, 197 flow. Second operand 3 states and 1011 transitions. [2023-08-30 02:06:46,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 75 transitions, 317 flow [2023-08-30 02:06:46,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 75 transitions, 314 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:06:46,296 INFO L231 Difference]: Finished difference. Result has 77 places, 75 transitions, 192 flow [2023-08-30 02:06:46,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=77, PETRI_TRANSITIONS=75} [2023-08-30 02:06:46,297 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -62 predicate places. [2023-08-30 02:06:46,297 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 75 transitions, 192 flow [2023-08-30 02:06:46,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 0 states have call successors, (0), 0 states 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 02:06:46,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:46,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:06:46,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 02:06:46,298 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:46,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:46,298 INFO L85 PathProgramCache]: Analyzing trace with hash 236453581, now seen corresponding path program 1 times [2023-08-30 02:06:46,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:46,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386288397] [2023-08-30 02:06:46,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:46,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:46,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:46,837 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 02:06:46,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:46,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386288397] [2023-08-30 02:06:46,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386288397] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:46,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:46,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 02:06:46,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70357223] [2023-08-30 02:06:46,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:46,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 02:06:46,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:46,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 02:06:46,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 02:06:48,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 753 [2023-08-30 02:06:48,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 75 transitions, 192 flow. Second operand has 6 states, 6 states have (on average 300.6666666666667) internal successors, (1804), 6 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states 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 02:06:48,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:48,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 753 [2023-08-30 02:06:48,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:49,429 INFO L130 PetriNetUnfolder]: 1542/2690 cut-off events. [2023-08-30 02:06:49,429 INFO L131 PetriNetUnfolder]: For 103/103 co-relation queries the response was YES. [2023-08-30 02:06:49,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5415 conditions, 2690 events. 1542/2690 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 11473 event pairs, 1177 based on Foata normal form. 0/2135 useless extension candidates. Maximal degree in co-relation 5407. Up to 2490 conditions per place. [2023-08-30 02:06:49,439 INFO L137 encePairwiseOnDemand]: 745/753 looper letters, 64 selfloop transitions, 11 changer transitions 0/84 dead transitions. [2023-08-30 02:06:49,439 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 84 transitions, 368 flow [2023-08-30 02:06:49,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 02:06:49,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 02:06:49,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2169 transitions. [2023-08-30 02:06:49,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41149686966420035 [2023-08-30 02:06:49,446 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2169 transitions. [2023-08-30 02:06:49,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2169 transitions. [2023-08-30 02:06:49,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:49,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2169 transitions. [2023-08-30 02:06:49,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 309.85714285714283) internal successors, (2169), 7 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states 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 02:06:49,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 753.0) internal successors, (6024), 8 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:06:49,457 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 753.0) internal successors, (6024), 8 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:06:49,457 INFO L175 Difference]: Start difference. First operand has 77 places, 75 transitions, 192 flow. Second operand 7 states and 2169 transitions. [2023-08-30 02:06:49,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 84 transitions, 368 flow [2023-08-30 02:06:49,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 84 transitions, 364 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:06:49,460 INFO L231 Difference]: Finished difference. Result has 84 places, 81 transitions, 249 flow [2023-08-30 02:06:49,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=249, PETRI_PLACES=84, PETRI_TRANSITIONS=81} [2023-08-30 02:06:49,461 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -55 predicate places. [2023-08-30 02:06:49,461 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 81 transitions, 249 flow [2023-08-30 02:06:49,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 300.6666666666667) internal successors, (1804), 6 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states 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 02:06:49,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:49,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:06:49,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 02:06:49,462 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:49,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:49,462 INFO L85 PathProgramCache]: Analyzing trace with hash 138579933, now seen corresponding path program 1 times [2023-08-30 02:06:49,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:49,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461092789] [2023-08-30 02:06:49,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:49,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:49,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:49,608 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 02:06:49,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:49,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461092789] [2023-08-30 02:06:49,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461092789] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:49,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:49,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:06:49,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196303844] [2023-08-30 02:06:49,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:49,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 02:06:49,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:49,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 02:06:49,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 02:06:49,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 753 [2023-08-30 02:06:49,808 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 81 transitions, 249 flow. Second operand has 4 states, 4 states have (on average 322.5) internal successors, (1290), 4 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states 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 02:06:49,808 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:49,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 753 [2023-08-30 02:06:49,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:49,990 INFO L130 PetriNetUnfolder]: 1435/2530 cut-off events. [2023-08-30 02:06:49,990 INFO L131 PetriNetUnfolder]: For 185/185 co-relation queries the response was YES. [2023-08-30 02:06:49,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5149 conditions, 2530 events. 1435/2530 cut-off events. For 185/185 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 10883 event pairs, 1087 based on Foata normal form. 0/2012 useless extension candidates. Maximal degree in co-relation 5138. Up to 2317 conditions per place. [2023-08-30 02:06:50,000 INFO L137 encePairwiseOnDemand]: 750/753 looper letters, 66 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-08-30 02:06:50,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 80 transitions, 383 flow [2023-08-30 02:06:50,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 02:06:50,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 02:06:50,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1340 transitions. [2023-08-30 02:06:50,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448871181938911 [2023-08-30 02:06:50,004 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1340 transitions. [2023-08-30 02:06:50,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1340 transitions. [2023-08-30 02:06:50,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:50,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1340 transitions. [2023-08-30 02:06:50,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states 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 02:06:50,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states 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 02:06:50,012 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states 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 02:06:50,012 INFO L175 Difference]: Start difference. First operand has 84 places, 81 transitions, 249 flow. Second operand 4 states and 1340 transitions. [2023-08-30 02:06:50,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 80 transitions, 383 flow [2023-08-30 02:06:50,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 80 transitions, 365 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-30 02:06:50,015 INFO L231 Difference]: Finished difference. Result has 83 places, 80 transitions, 233 flow [2023-08-30 02:06:50,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=233, PETRI_PLACES=83, PETRI_TRANSITIONS=80} [2023-08-30 02:06:50,016 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -56 predicate places. [2023-08-30 02:06:50,016 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 80 transitions, 233 flow [2023-08-30 02:06:50,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 322.5) internal successors, (1290), 4 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states 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 02:06:50,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:50,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:06:50,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 02:06:50,018 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:50,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:50,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1009501, now seen corresponding path program 1 times [2023-08-30 02:06:50,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:50,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130895849] [2023-08-30 02:06:50,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:50,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:50,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:50,055 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 02:06:50,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:50,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130895849] [2023-08-30 02:06:50,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130895849] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:50,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:50,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:06:50,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514632395] [2023-08-30 02:06:50,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:50,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:06:50,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:50,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:06:50,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:06:50,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 753 [2023-08-30 02:06:50,064 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 80 transitions, 233 flow. Second operand has 3 states, 3 states have (on average 323.3333333333333) internal successors, (970), 3 states have internal predecessors, (970), 0 states have call successors, (0), 0 states 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 02:06:50,064 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:50,064 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 753 [2023-08-30 02:06:50,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:50,309 INFO L130 PetriNetUnfolder]: 1425/2519 cut-off events. [2023-08-30 02:06:50,309 INFO L131 PetriNetUnfolder]: For 109/109 co-relation queries the response was YES. [2023-08-30 02:06:50,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5087 conditions, 2519 events. 1425/2519 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 10881 event pairs, 1060 based on Foata normal form. 0/2008 useless extension candidates. Maximal degree in co-relation 5076. Up to 2277 conditions per place. [2023-08-30 02:06:50,320 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 70 selfloop transitions, 4 changer transitions 0/86 dead transitions. [2023-08-30 02:06:50,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 86 transitions, 396 flow [2023-08-30 02:06:50,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:06:50,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:06:50,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1026 transitions. [2023-08-30 02:06:50,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4541832669322709 [2023-08-30 02:06:50,324 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1026 transitions. [2023-08-30 02:06:50,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1026 transitions. [2023-08-30 02:06:50,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:50,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1026 transitions. [2023-08-30 02:06:50,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 342.0) internal successors, (1026), 3 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:06:50,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:06:50,330 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:06:50,330 INFO L175 Difference]: Start difference. First operand has 83 places, 80 transitions, 233 flow. Second operand 3 states and 1026 transitions. [2023-08-30 02:06:50,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 86 transitions, 396 flow [2023-08-30 02:06:50,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 86 transitions, 393 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:06:50,332 INFO L231 Difference]: Finished difference. Result has 83 places, 79 transitions, 236 flow [2023-08-30 02:06:50,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=83, PETRI_TRANSITIONS=79} [2023-08-30 02:06:50,333 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -56 predicate places. [2023-08-30 02:06:50,333 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 79 transitions, 236 flow [2023-08-30 02:06:50,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 323.3333333333333) internal successors, (970), 3 states have internal predecessors, (970), 0 states have call successors, (0), 0 states 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 02:06:50,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:50,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:06:50,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 02:06:50,334 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:50,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:50,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1682506611, now seen corresponding path program 1 times [2023-08-30 02:06:50,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:50,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767551150] [2023-08-30 02:06:50,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:50,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:50,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:50,936 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 02:06:50,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:50,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767551150] [2023-08-30 02:06:50,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767551150] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:50,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:50,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 02:06:50,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006461730] [2023-08-30 02:06:50,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:50,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 02:06:50,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:50,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 02:06:50,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 02:06:51,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 753 [2023-08-30 02:06:51,774 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 79 transitions, 236 flow. Second operand has 8 states, 8 states have (on average 290.625) internal successors, (2325), 8 states have internal predecessors, (2325), 0 states have call successors, (0), 0 states 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 02:06:51,774 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:51,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 753 [2023-08-30 02:06:51,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:52,247 INFO L130 PetriNetUnfolder]: 1631/2857 cut-off events. [2023-08-30 02:06:52,248 INFO L131 PetriNetUnfolder]: For 169/169 co-relation queries the response was YES. [2023-08-30 02:06:52,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5872 conditions, 2857 events. 1631/2857 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 12455 event pairs, 493 based on Foata normal form. 9/2326 useless extension candidates. Maximal degree in co-relation 5861. Up to 2374 conditions per place. [2023-08-30 02:06:52,257 INFO L137 encePairwiseOnDemand]: 744/753 looper letters, 90 selfloop transitions, 13 changer transitions 0/112 dead transitions. [2023-08-30 02:06:52,257 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 112 transitions, 524 flow [2023-08-30 02:06:52,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 02:06:52,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 02:06:52,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1832 transitions. [2023-08-30 02:06:52,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40548915449313855 [2023-08-30 02:06:52,262 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1832 transitions. [2023-08-30 02:06:52,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1832 transitions. [2023-08-30 02:06:52,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:52,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1832 transitions. [2023-08-30 02:06:52,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 305.3333333333333) internal successors, (1832), 6 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states 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 02:06:52,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 753.0) internal successors, (5271), 7 states have internal predecessors, (5271), 0 states have call successors, (0), 0 states 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 02:06:52,272 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 753.0) internal successors, (5271), 7 states have internal predecessors, (5271), 0 states have call successors, (0), 0 states 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 02:06:52,272 INFO L175 Difference]: Start difference. First operand has 83 places, 79 transitions, 236 flow. Second operand 6 states and 1832 transitions. [2023-08-30 02:06:52,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 112 transitions, 524 flow [2023-08-30 02:06:52,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 112 transitions, 510 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:06:52,276 INFO L231 Difference]: Finished difference. Result has 88 places, 83 transitions, 287 flow [2023-08-30 02:06:52,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=287, PETRI_PLACES=88, PETRI_TRANSITIONS=83} [2023-08-30 02:06:52,277 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -51 predicate places. [2023-08-30 02:06:52,277 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 83 transitions, 287 flow [2023-08-30 02:06:52,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 290.625) internal successors, (2325), 8 states have internal predecessors, (2325), 0 states have call successors, (0), 0 states 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 02:06:52,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:52,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:06:52,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 02:06:52,278 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:52,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:52,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1552665017, now seen corresponding path program 2 times [2023-08-30 02:06:52,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:52,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276837392] [2023-08-30 02:06:52,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:52,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:52,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:53,067 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 02:06:53,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:53,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276837392] [2023-08-30 02:06:53,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276837392] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:53,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:53,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 02:06:53,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176973294] [2023-08-30 02:06:53,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:53,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 02:06:53,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:53,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 02:06:53,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 02:06:56,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 753 [2023-08-30 02:06:56,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 287 flow. Second operand has 8 states, 8 states have (on average 289.625) internal successors, (2317), 8 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states 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 02:06:56,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:56,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 753 [2023-08-30 02:06:56,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:57,763 INFO L130 PetriNetUnfolder]: 1665/2951 cut-off events. [2023-08-30 02:06:57,763 INFO L131 PetriNetUnfolder]: For 395/395 co-relation queries the response was YES. [2023-08-30 02:06:57,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6155 conditions, 2951 events. 1665/2951 cut-off events. For 395/395 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 13110 event pairs, 1216 based on Foata normal form. 18/2417 useless extension candidates. Maximal degree in co-relation 6142. Up to 2446 conditions per place. [2023-08-30 02:06:57,773 INFO L137 encePairwiseOnDemand]: 745/753 looper letters, 76 selfloop transitions, 13 changer transitions 0/98 dead transitions. [2023-08-30 02:06:57,773 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 98 transitions, 502 flow [2023-08-30 02:06:57,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 02:06:57,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 02:06:57,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2101 transitions. [2023-08-30 02:06:57,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39859609182318345 [2023-08-30 02:06:57,778 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2101 transitions. [2023-08-30 02:06:57,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2101 transitions. [2023-08-30 02:06:57,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:57,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2101 transitions. [2023-08-30 02:06:57,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 300.14285714285717) internal successors, (2101), 7 states have internal predecessors, (2101), 0 states have call successors, (0), 0 states 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 02:06:57,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 753.0) internal successors, (6024), 8 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:06:57,789 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 753.0) internal successors, (6024), 8 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:06:57,789 INFO L175 Difference]: Start difference. First operand has 88 places, 83 transitions, 287 flow. Second operand 7 states and 2101 transitions. [2023-08-30 02:06:57,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 98 transitions, 502 flow [2023-08-30 02:06:57,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 98 transitions, 483 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 02:06:57,792 INFO L231 Difference]: Finished difference. Result has 92 places, 82 transitions, 307 flow [2023-08-30 02:06:57,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=307, PETRI_PLACES=92, PETRI_TRANSITIONS=82} [2023-08-30 02:06:57,793 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -47 predicate places. [2023-08-30 02:06:57,793 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 82 transitions, 307 flow [2023-08-30 02:06:57,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 289.625) internal successors, (2317), 8 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states 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 02:06:57,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:57,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:06:57,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 02:06:57,794 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:57,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:57,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1611999738, now seen corresponding path program 1 times [2023-08-30 02:06:57,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:57,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439527127] [2023-08-30 02:06:57,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:57,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:57,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:58,623 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 02:06:58,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:58,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439527127] [2023-08-30 02:06:58,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439527127] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:58,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:58,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 02:06:58,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530496308] [2023-08-30 02:06:58,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:58,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 02:06:58,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:58,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 02:06:58,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-08-30 02:06:59,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 753 [2023-08-30 02:06:59,492 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 82 transitions, 307 flow. Second operand has 10 states, 10 states have (on average 285.3) internal successors, (2853), 10 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states 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 02:06:59,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:59,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 753 [2023-08-30 02:06:59,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:07:00,014 INFO L130 PetriNetUnfolder]: 1664/2928 cut-off events. [2023-08-30 02:07:00,014 INFO L131 PetriNetUnfolder]: For 324/324 co-relation queries the response was YES. [2023-08-30 02:07:00,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6180 conditions, 2928 events. 1664/2928 cut-off events. For 324/324 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 12849 event pairs, 1258 based on Foata normal form. 0/2375 useless extension candidates. Maximal degree in co-relation 6165. Up to 2697 conditions per place. [2023-08-30 02:07:00,026 INFO L137 encePairwiseOnDemand]: 742/753 looper letters, 74 selfloop transitions, 17 changer transitions 0/100 dead transitions. [2023-08-30 02:07:00,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 100 transitions, 537 flow [2023-08-30 02:07:00,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 02:07:00,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 02:07:00,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2642 transitions. [2023-08-30 02:07:00,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898480153460233 [2023-08-30 02:07:00,032 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2642 transitions. [2023-08-30 02:07:00,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2642 transitions. [2023-08-30 02:07:00,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:07:00,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2642 transitions. [2023-08-30 02:07:00,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 293.55555555555554) internal successors, (2642), 9 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states 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 02:07:00,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 753.0) internal successors, (7530), 10 states have internal predecessors, (7530), 0 states have call successors, (0), 0 states 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 02:07:00,044 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 753.0) internal successors, (7530), 10 states have internal predecessors, (7530), 0 states have call successors, (0), 0 states 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 02:07:00,045 INFO L175 Difference]: Start difference. First operand has 92 places, 82 transitions, 307 flow. Second operand 9 states and 2642 transitions. [2023-08-30 02:07:00,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 100 transitions, 537 flow [2023-08-30 02:07:00,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 100 transitions, 517 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-30 02:07:00,048 INFO L231 Difference]: Finished difference. Result has 99 places, 89 transitions, 368 flow [2023-08-30 02:07:00,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=368, PETRI_PLACES=99, PETRI_TRANSITIONS=89} [2023-08-30 02:07:00,049 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -40 predicate places. [2023-08-30 02:07:00,049 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 89 transitions, 368 flow [2023-08-30 02:07:00,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 285.3) internal successors, (2853), 10 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states 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 02:07:00,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:07:00,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:07:00,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 02:07:00,050 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:07:00,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:07:00,051 INFO L85 PathProgramCache]: Analyzing trace with hash 829469450, now seen corresponding path program 1 times [2023-08-30 02:07:00,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:07:00,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784641421] [2023-08-30 02:07:00,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:00,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:07:00,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:07:00,837 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 02:07:00,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:07:00,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784641421] [2023-08-30 02:07:00,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784641421] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:07:00,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:07:00,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-30 02:07:00,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741217337] [2023-08-30 02:07:00,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:07:00,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 02:07:00,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:07:00,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 02:07:00,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-08-30 02:07:02,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 753 [2023-08-30 02:07:02,661 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 89 transitions, 368 flow. Second operand has 12 states, 12 states have (on average 278.1666666666667) internal successors, (3338), 12 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states 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 02:07:02,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:07:02,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 753 [2023-08-30 02:07:02,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:07:03,478 INFO L130 PetriNetUnfolder]: 1824/3209 cut-off events. [2023-08-30 02:07:03,479 INFO L131 PetriNetUnfolder]: For 400/400 co-relation queries the response was YES. [2023-08-30 02:07:03,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6889 conditions, 3209 events. 1824/3209 cut-off events. For 400/400 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 14462 event pairs, 565 based on Foata normal form. 0/2614 useless extension candidates. Maximal degree in co-relation 6871. Up to 2222 conditions per place. [2023-08-30 02:07:03,495 INFO L137 encePairwiseOnDemand]: 742/753 looper letters, 115 selfloop transitions, 23 changer transitions 0/147 dead transitions. [2023-08-30 02:07:03,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 147 transitions, 776 flow [2023-08-30 02:07:03,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 02:07:03,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 02:07:03,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2617 transitions. [2023-08-30 02:07:03,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38615906743396783 [2023-08-30 02:07:03,501 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2617 transitions. [2023-08-30 02:07:03,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2617 transitions. [2023-08-30 02:07:03,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:07:03,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2617 transitions. [2023-08-30 02:07:03,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 290.77777777777777) internal successors, (2617), 9 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states 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 02:07:03,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 753.0) internal successors, (7530), 10 states have internal predecessors, (7530), 0 states have call successors, (0), 0 states 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 02:07:03,513 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 753.0) internal successors, (7530), 10 states have internal predecessors, (7530), 0 states have call successors, (0), 0 states 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 02:07:03,513 INFO L175 Difference]: Start difference. First operand has 99 places, 89 transitions, 368 flow. Second operand 9 states and 2617 transitions. [2023-08-30 02:07:03,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 147 transitions, 776 flow [2023-08-30 02:07:03,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 147 transitions, 748 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-30 02:07:03,518 INFO L231 Difference]: Finished difference. Result has 104 places, 92 transitions, 423 flow [2023-08-30 02:07:03,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=423, PETRI_PLACES=104, PETRI_TRANSITIONS=92} [2023-08-30 02:07:03,518 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -35 predicate places. [2023-08-30 02:07:03,519 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 92 transitions, 423 flow [2023-08-30 02:07:03,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 278.1666666666667) internal successors, (3338), 12 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states 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 02:07:03,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:07:03,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:07:03,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 02:07:03,520 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:07:03,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:07:03,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1567339102, now seen corresponding path program 2 times [2023-08-30 02:07:03,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:07:03,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55147044] [2023-08-30 02:07:03,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:03,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:07:03,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:09:13,084 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 02:09:13,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:09:13,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55147044] [2023-08-30 02:09:13,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55147044] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:09:13,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:09:13,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-30 02:09:13,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389936208] [2023-08-30 02:09:13,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:09:13,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 02:09:13,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:09:13,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 02:09:13,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-08-30 02:09:59,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 753 [2023-08-30 02:09:59,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 92 transitions, 423 flow. Second operand has 13 states, 13 states have (on average 267.0769230769231) internal successors, (3472), 13 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states 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 02:09:59,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:09:59,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 753 [2023-08-30 02:09:59,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:10:05,159 INFO L130 PetriNetUnfolder]: 2089/3679 cut-off events. [2023-08-30 02:10:05,159 INFO L131 PetriNetUnfolder]: For 867/867 co-relation queries the response was YES. [2023-08-30 02:10:05,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8200 conditions, 3679 events. 2089/3679 cut-off events. For 867/867 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 17436 event pairs, 1345 based on Foata normal form. 0/2988 useless extension candidates. Maximal degree in co-relation 8180. Up to 2499 conditions per place. [2023-08-30 02:10:05,174 INFO L137 encePairwiseOnDemand]: 739/753 looper letters, 119 selfloop transitions, 30 changer transitions 0/158 dead transitions. [2023-08-30 02:10:05,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 158 transitions, 912 flow [2023-08-30 02:10:05,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 02:10:05,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 02:10:05,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3595 transitions. [2023-08-30 02:10:05,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3672489529063234 [2023-08-30 02:10:05,181 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3595 transitions. [2023-08-30 02:10:05,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3595 transitions. [2023-08-30 02:10:05,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:10:05,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3595 transitions. [2023-08-30 02:10:05,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 276.53846153846155) internal successors, (3595), 13 states have internal predecessors, (3595), 0 states have call successors, (0), 0 states 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 02:10:05,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 753.0) internal successors, (10542), 14 states have internal predecessors, (10542), 0 states have call successors, (0), 0 states 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 02:10:05,197 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 753.0) internal successors, (10542), 14 states have internal predecessors, (10542), 0 states have call successors, (0), 0 states 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 02:10:05,198 INFO L175 Difference]: Start difference. First operand has 104 places, 92 transitions, 423 flow. Second operand 13 states and 3595 transitions. [2023-08-30 02:10:05,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 158 transitions, 912 flow [2023-08-30 02:10:05,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 158 transitions, 866 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-08-30 02:10:05,205 INFO L231 Difference]: Finished difference. Result has 115 places, 102 transitions, 556 flow [2023-08-30 02:10:05,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=556, PETRI_PLACES=115, PETRI_TRANSITIONS=102} [2023-08-30 02:10:05,206 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -24 predicate places. [2023-08-30 02:10:05,206 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 102 transitions, 556 flow [2023-08-30 02:10:05,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 267.0769230769231) internal successors, (3472), 13 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states 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 02:10:05,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:10:05,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:10:05,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-30 02:10:05,207 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:10:05,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:10:05,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1567656232, now seen corresponding path program 3 times [2023-08-30 02:10:05,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:10:05,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089377750] [2023-08-30 02:10:05,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:10:05,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:10:05,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:10:06,263 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 02:10:06,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:10:06,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089377750] [2023-08-30 02:10:06,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089377750] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:10:06,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:10:06,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-30 02:10:06,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687908283] [2023-08-30 02:10:06,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:10:06,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 02:10:06,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:10:06,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 02:10:06,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-08-30 02:10:10,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 753 [2023-08-30 02:10:10,646 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 102 transitions, 556 flow. Second operand has 12 states, 12 states have (on average 265.1666666666667) internal successors, (3182), 12 states have internal predecessors, (3182), 0 states have call successors, (0), 0 states 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 02:10:10,646 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:10:10,646 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 753 [2023-08-30 02:10:10,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:10:12,275 INFO L130 PetriNetUnfolder]: 2076/3660 cut-off events. [2023-08-30 02:10:12,275 INFO L131 PetriNetUnfolder]: For 1290/1290 co-relation queries the response was YES. [2023-08-30 02:10:12,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8355 conditions, 3660 events. 2076/3660 cut-off events. For 1290/1290 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 17292 event pairs, 1375 based on Foata normal form. 0/2982 useless extension candidates. Maximal degree in co-relation 8330. Up to 2501 conditions per place. [2023-08-30 02:10:12,289 INFO L137 encePairwiseOnDemand]: 740/753 looper letters, 108 selfloop transitions, 27 changer transitions 0/143 dead transitions. [2023-08-30 02:10:12,289 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 143 transitions, 911 flow [2023-08-30 02:10:12,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 02:10:12,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 02:10:12,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2761 transitions. [2023-08-30 02:10:12,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2023-08-30 02:10:12,294 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2761 transitions. [2023-08-30 02:10:12,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2761 transitions. [2023-08-30 02:10:12,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:10:12,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2761 transitions. [2023-08-30 02:10:12,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 276.1) internal successors, (2761), 10 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states 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 02:10:12,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 753.0) internal successors, (8283), 11 states have internal predecessors, (8283), 0 states have call successors, (0), 0 states 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 02:10:12,304 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 753.0) internal successors, (8283), 11 states have internal predecessors, (8283), 0 states have call successors, (0), 0 states 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 02:10:12,305 INFO L175 Difference]: Start difference. First operand has 115 places, 102 transitions, 556 flow. Second operand 10 states and 2761 transitions. [2023-08-30 02:10:12,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 143 transitions, 911 flow [2023-08-30 02:10:12,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 143 transitions, 874 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-08-30 02:10:12,312 INFO L231 Difference]: Finished difference. Result has 116 places, 100 transitions, 565 flow [2023-08-30 02:10:12,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=565, PETRI_PLACES=116, PETRI_TRANSITIONS=100} [2023-08-30 02:10:12,313 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -23 predicate places. [2023-08-30 02:10:12,313 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 100 transitions, 565 flow [2023-08-30 02:10:12,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 265.1666666666667) internal successors, (3182), 12 states have internal predecessors, (3182), 0 states have call successors, (0), 0 states 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 02:10:12,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:10:12,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:10:12,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-30 02:10:12,314 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:10:12,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:10:12,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1027074210, now seen corresponding path program 1 times [2023-08-30 02:10:12,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:10:12,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104822758] [2023-08-30 02:10:12,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:10:12,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:10:12,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:10:12,974 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 02:10:12,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:10:12,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104822758] [2023-08-30 02:10:12,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104822758] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:10:12,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:10:12,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 02:10:12,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211442860] [2023-08-30 02:10:12,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:10:12,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 02:10:12,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:10:12,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 02:10:12,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-08-30 02:10:14,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 753 [2023-08-30 02:10:14,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 100 transitions, 565 flow. Second operand has 11 states, 11 states have (on average 270.54545454545456) internal successors, (2976), 11 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states 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 02:10:14,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:10:14,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 753 [2023-08-30 02:10:14,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:10:14,753 INFO L130 PetriNetUnfolder]: 2235/3928 cut-off events. [2023-08-30 02:10:14,753 INFO L131 PetriNetUnfolder]: For 1582/1582 co-relation queries the response was YES. [2023-08-30 02:10:14,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9160 conditions, 3928 events. 2235/3928 cut-off events. For 1582/1582 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 18836 event pairs, 1557 based on Foata normal form. 0/3201 useless extension candidates. Maximal degree in co-relation 9135. Up to 3373 conditions per place. [2023-08-30 02:10:14,767 INFO L137 encePairwiseOnDemand]: 743/753 looper letters, 109 selfloop transitions, 20 changer transitions 0/137 dead transitions. [2023-08-30 02:10:14,768 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 137 transitions, 962 flow [2023-08-30 02:10:14,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 02:10:14,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 02:10:14,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2797 transitions. [2023-08-30 02:10:14,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37144754316069056 [2023-08-30 02:10:14,770 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2797 transitions. [2023-08-30 02:10:14,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2797 transitions. [2023-08-30 02:10:14,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:10:14,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2797 transitions. [2023-08-30 02:10:14,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 279.7) internal successors, (2797), 10 states have internal predecessors, (2797), 0 states have call successors, (0), 0 states 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 02:10:14,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 753.0) internal successors, (8283), 11 states have internal predecessors, (8283), 0 states have call successors, (0), 0 states 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 02:10:14,780 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 753.0) internal successors, (8283), 11 states have internal predecessors, (8283), 0 states have call successors, (0), 0 states 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 02:10:14,780 INFO L175 Difference]: Start difference. First operand has 116 places, 100 transitions, 565 flow. Second operand 10 states and 2797 transitions. [2023-08-30 02:10:14,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 137 transitions, 962 flow [2023-08-30 02:10:14,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 137 transitions, 896 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-08-30 02:10:14,788 INFO L231 Difference]: Finished difference. Result has 119 places, 104 transitions, 608 flow [2023-08-30 02:10:14,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=608, PETRI_PLACES=119, PETRI_TRANSITIONS=104} [2023-08-30 02:10:14,789 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -20 predicate places. [2023-08-30 02:10:14,789 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 104 transitions, 608 flow [2023-08-30 02:10:14,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 270.54545454545456) internal successors, (2976), 11 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states 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 02:10:14,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:10:14,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:10:14,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-30 02:10:14,790 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:10:14,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:10:14,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1146690374, now seen corresponding path program 1 times [2023-08-30 02:10:14,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:10:14,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142493182] [2023-08-30 02:10:14,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:10:14,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:10:14,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:10:15,662 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 02:10:15,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:10:15,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142493182] [2023-08-30 02:10:15,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142493182] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:10:15,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:10:15,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-30 02:10:15,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163303278] [2023-08-30 02:10:15,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:10:15,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 02:10:15,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:10:15,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 02:10:15,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-08-30 02:10:17,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 753 [2023-08-30 02:10:17,523 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 104 transitions, 608 flow. Second operand has 12 states, 12 states have (on average 268.5) internal successors, (3222), 12 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states 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 02:10:17,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:10:17,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 753 [2023-08-30 02:10:17,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:10:18,148 INFO L130 PetriNetUnfolder]: 2209/3888 cut-off events. [2023-08-30 02:10:18,148 INFO L131 PetriNetUnfolder]: For 1608/1608 co-relation queries the response was YES. [2023-08-30 02:10:18,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9065 conditions, 3888 events. 2209/3888 cut-off events. For 1608/1608 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 18624 event pairs, 669 based on Foata normal form. 18/3270 useless extension candidates. Maximal degree in co-relation 9037. Up to 2362 conditions per place. [2023-08-30 02:10:18,164 INFO L137 encePairwiseOnDemand]: 743/753 looper letters, 122 selfloop transitions, 29 changer transitions 0/159 dead transitions. [2023-08-30 02:10:18,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 159 transitions, 1036 flow [2023-08-30 02:10:18,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 02:10:18,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 02:10:18,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2525 transitions. [2023-08-30 02:10:18,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3725837391176037 [2023-08-30 02:10:18,167 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2525 transitions. [2023-08-30 02:10:18,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2525 transitions. [2023-08-30 02:10:18,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:10:18,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2525 transitions. [2023-08-30 02:10:18,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 280.55555555555554) internal successors, (2525), 9 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states 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 02:10:18,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 753.0) internal successors, (7530), 10 states have internal predecessors, (7530), 0 states have call successors, (0), 0 states 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 02:10:18,174 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 753.0) internal successors, (7530), 10 states have internal predecessors, (7530), 0 states have call successors, (0), 0 states 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 02:10:18,174 INFO L175 Difference]: Start difference. First operand has 119 places, 104 transitions, 608 flow. Second operand 9 states and 2525 transitions. [2023-08-30 02:10:18,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 159 transitions, 1036 flow [2023-08-30 02:10:18,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 159 transitions, 1009 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 02:10:18,183 INFO L231 Difference]: Finished difference. Result has 122 places, 104 transitions, 651 flow [2023-08-30 02:10:18,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=651, PETRI_PLACES=122, PETRI_TRANSITIONS=104} [2023-08-30 02:10:18,184 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -17 predicate places. [2023-08-30 02:10:18,184 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 104 transitions, 651 flow [2023-08-30 02:10:18,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 268.5) internal successors, (3222), 12 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states 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 02:10:18,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:10:18,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:10:18,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-30 02:10:18,185 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:10:18,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:10:18,186 INFO L85 PathProgramCache]: Analyzing trace with hash -2037496838, now seen corresponding path program 2 times [2023-08-30 02:10:18,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:10:18,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716470424] [2023-08-30 02:10:18,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:10:18,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:10:18,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:10:18,927 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 02:10:18,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:10:18,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716470424] [2023-08-30 02:10:18,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716470424] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:10:18,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:10:18,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-30 02:10:18,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060563805] [2023-08-30 02:10:18,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:10:18,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 02:10:18,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:10:18,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 02:10:18,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-08-30 02:10:21,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 753 [2023-08-30 02:10:21,153 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 104 transitions, 651 flow. Second operand has 12 states, 12 states have (on average 268.5) internal successors, (3222), 12 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states 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 02:10:21,153 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:10:21,153 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 753 [2023-08-30 02:10:21,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:10:21,936 INFO L130 PetriNetUnfolder]: 2196/3858 cut-off events. [2023-08-30 02:10:21,936 INFO L131 PetriNetUnfolder]: For 2360/2360 co-relation queries the response was YES. [2023-08-30 02:10:21,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9254 conditions, 3858 events. 2196/3858 cut-off events. For 2360/2360 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 18387 event pairs, 573 based on Foata normal form. 9/3235 useless extension candidates. Maximal degree in co-relation 9225. Up to 2070 conditions per place. [2023-08-30 02:10:21,956 INFO L137 encePairwiseOnDemand]: 743/753 looper letters, 118 selfloop transitions, 30 changer transitions 0/156 dead transitions. [2023-08-30 02:10:21,956 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 156 transitions, 1063 flow [2023-08-30 02:10:21,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 02:10:21,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 02:10:21,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2788 transitions. [2023-08-30 02:10:21,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3702523240371846 [2023-08-30 02:10:21,959 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2788 transitions. [2023-08-30 02:10:21,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2788 transitions. [2023-08-30 02:10:21,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:10:21,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2788 transitions. [2023-08-30 02:10:21,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 278.8) internal successors, (2788), 10 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states 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 02:10:21,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 753.0) internal successors, (8283), 11 states have internal predecessors, (8283), 0 states have call successors, (0), 0 states 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 02:10:21,968 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 753.0) internal successors, (8283), 11 states have internal predecessors, (8283), 0 states have call successors, (0), 0 states 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 02:10:21,968 INFO L175 Difference]: Start difference. First operand has 122 places, 104 transitions, 651 flow. Second operand 10 states and 2788 transitions. [2023-08-30 02:10:21,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 156 transitions, 1063 flow [2023-08-30 02:10:21,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 156 transitions, 1024 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-08-30 02:10:21,979 INFO L231 Difference]: Finished difference. Result has 126 places, 105 transitions, 693 flow [2023-08-30 02:10:21,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=612, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=693, PETRI_PLACES=126, PETRI_TRANSITIONS=105} [2023-08-30 02:10:21,980 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -13 predicate places. [2023-08-30 02:10:21,980 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 105 transitions, 693 flow [2023-08-30 02:10:21,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 268.5) internal successors, (3222), 12 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states 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 02:10:21,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:10:21,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:10:21,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-30 02:10:21,981 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:10:21,981 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:10:21,981 INFO L85 PathProgramCache]: Analyzing trace with hash 278044459, now seen corresponding path program 1 times [2023-08-30 02:10:21,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:10:21,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415336095] [2023-08-30 02:10:21,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:10:21,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:10:22,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:10:22,676 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 02:10:22,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:10:22,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415336095] [2023-08-30 02:10:22,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415336095] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:10:22,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:10:22,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-30 02:10:22,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721303134] [2023-08-30 02:10:22,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:10:22,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 02:10:22,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:10:22,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 02:10:22,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-08-30 02:10:23,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 753 [2023-08-30 02:10:23,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 105 transitions, 693 flow. Second operand has 13 states, 13 states have (on average 282.7692307692308) internal successors, (3676), 13 states have internal predecessors, (3676), 0 states have call successors, (0), 0 states 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 02:10:23,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:10:23,952 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 753 [2023-08-30 02:10:23,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:10:24,706 INFO L130 PetriNetUnfolder]: 2290/4019 cut-off events. [2023-08-30 02:10:24,707 INFO L131 PetriNetUnfolder]: For 3014/3014 co-relation queries the response was YES. [2023-08-30 02:10:24,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9745 conditions, 4019 events. 2290/4019 cut-off events. For 3014/3014 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 19277 event pairs, 1554 based on Foata normal form. 0/3360 useless extension candidates. Maximal degree in co-relation 9715. Up to 3317 conditions per place. [2023-08-30 02:10:24,723 INFO L137 encePairwiseOnDemand]: 737/753 looper letters, 140 selfloop transitions, 33 changer transitions 0/181 dead transitions. [2023-08-30 02:10:24,723 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 181 transitions, 1261 flow [2023-08-30 02:10:24,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 02:10:24,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 02:10:24,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 4646 transitions. [2023-08-30 02:10:24,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3856241699867198 [2023-08-30 02:10:24,728 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 4646 transitions. [2023-08-30 02:10:24,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 4646 transitions. [2023-08-30 02:10:24,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:10:24,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 4646 transitions. [2023-08-30 02:10:24,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 290.375) internal successors, (4646), 16 states have internal predecessors, (4646), 0 states have call successors, (0), 0 states 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 02:10:24,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 753.0) internal successors, (12801), 17 states have internal predecessors, (12801), 0 states have call successors, (0), 0 states 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 02:10:24,742 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 753.0) internal successors, (12801), 17 states have internal predecessors, (12801), 0 states have call successors, (0), 0 states 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 02:10:24,742 INFO L175 Difference]: Start difference. First operand has 126 places, 105 transitions, 693 flow. Second operand 16 states and 4646 transitions. [2023-08-30 02:10:24,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 181 transitions, 1261 flow [2023-08-30 02:10:24,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 181 transitions, 1213 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-30 02:10:24,755 INFO L231 Difference]: Finished difference. Result has 141 places, 120 transitions, 828 flow [2023-08-30 02:10:24,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=647, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=828, PETRI_PLACES=141, PETRI_TRANSITIONS=120} [2023-08-30 02:10:24,756 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 2 predicate places. [2023-08-30 02:10:24,756 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 120 transitions, 828 flow [2023-08-30 02:10:24,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 282.7692307692308) internal successors, (3676), 13 states have internal predecessors, (3676), 0 states have call successors, (0), 0 states 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 02:10:24,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:10:24,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:10:24,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-30 02:10:24,758 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:10:24,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:10:24,759 INFO L85 PathProgramCache]: Analyzing trace with hash -743280340, now seen corresponding path program 1 times [2023-08-30 02:10:24,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:10:24,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955865502] [2023-08-30 02:10:24,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:10:24,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:10:24,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:10:24,824 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 02:10:24,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:10:24,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955865502] [2023-08-30 02:10:24,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955865502] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:10:24,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:10:24,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:10:24,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444441422] [2023-08-30 02:10:24,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:10:24,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:10:24,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:10:24,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:10:24,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:10:24,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 753 [2023-08-30 02:10:24,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 120 transitions, 828 flow. Second operand has 3 states, 3 states have (on average 328.6666666666667) internal successors, (986), 3 states have internal predecessors, (986), 0 states have call successors, (0), 0 states 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 02:10:24,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:10:24,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 753 [2023-08-30 02:10:24,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:10:25,567 INFO L130 PetriNetUnfolder]: 3507/6511 cut-off events. [2023-08-30 02:10:25,567 INFO L131 PetriNetUnfolder]: For 5158/5173 co-relation queries the response was YES. [2023-08-30 02:10:25,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15628 conditions, 6511 events. 3507/6511 cut-off events. For 5158/5173 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 38350 event pairs, 1626 based on Foata normal form. 13/5634 useless extension candidates. Maximal degree in co-relation 15591. Up to 3549 conditions per place. [2023-08-30 02:10:25,622 INFO L137 encePairwiseOnDemand]: 750/753 looper letters, 171 selfloop transitions, 2 changer transitions 0/190 dead transitions. [2023-08-30 02:10:25,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 190 transitions, 1568 flow [2023-08-30 02:10:25,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:10:25,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:10:25,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1066 transitions. [2023-08-30 02:10:25,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4718902169101372 [2023-08-30 02:10:25,625 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1066 transitions. [2023-08-30 02:10:25,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1066 transitions. [2023-08-30 02:10:25,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:10:25,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1066 transitions. [2023-08-30 02:10:25,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 355.3333333333333) internal successors, (1066), 3 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states 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 02:10:25,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:10:25,628 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:10:25,628 INFO L175 Difference]: Start difference. First operand has 141 places, 120 transitions, 828 flow. Second operand 3 states and 1066 transitions. [2023-08-30 02:10:25,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 190 transitions, 1568 flow [2023-08-30 02:10:25,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 190 transitions, 1530 flow, removed 5 selfloop flow, removed 7 redundant places. [2023-08-30 02:10:25,645 INFO L231 Difference]: Finished difference. Result has 137 places, 121 transitions, 807 flow [2023-08-30 02:10:25,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=807, PETRI_PLACES=137, PETRI_TRANSITIONS=121} [2023-08-30 02:10:25,646 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -2 predicate places. [2023-08-30 02:10:25,646 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 121 transitions, 807 flow [2023-08-30 02:10:25,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 328.6666666666667) internal successors, (986), 3 states have internal predecessors, (986), 0 states have call successors, (0), 0 states 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 02:10:25,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:10:25,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:10:25,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-30 02:10:25,647 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:10:25,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:10:25,648 INFO L85 PathProgramCache]: Analyzing trace with hash 666388507, now seen corresponding path program 1 times [2023-08-30 02:10:25,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:10:25,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165381438] [2023-08-30 02:10:25,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:10:25,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:10:25,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:10:25,797 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 02:10:25,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:10:25,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165381438] [2023-08-30 02:10:25,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165381438] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:10:25,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:10:25,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:10:25,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227179334] [2023-08-30 02:10:25,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:10:25,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 02:10:25,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:10:25,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 02:10:25,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 02:10:26,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 753 [2023-08-30 02:10:26,014 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 121 transitions, 807 flow. Second operand has 4 states, 4 states have (on average 321.5) internal successors, (1286), 4 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states 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 02:10:26,014 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:10:26,014 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 753 [2023-08-30 02:10:26,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:10:26,742 INFO L130 PetriNetUnfolder]: 4385/7753 cut-off events. [2023-08-30 02:10:26,742 INFO L131 PetriNetUnfolder]: For 6341/6352 co-relation queries the response was YES. [2023-08-30 02:10:26,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20465 conditions, 7753 events. 4385/7753 cut-off events. For 6341/6352 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 46461 event pairs, 1938 based on Foata normal form. 11/6994 useless extension candidates. Maximal degree in co-relation 20426. Up to 5843 conditions per place. [2023-08-30 02:10:26,792 INFO L137 encePairwiseOnDemand]: 748/753 looper letters, 148 selfloop transitions, 3 changer transitions 0/168 dead transitions. [2023-08-30 02:10:26,792 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 168 transitions, 1292 flow [2023-08-30 02:10:26,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 02:10:26,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 02:10:26,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1356 transitions. [2023-08-30 02:10:26,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.450199203187251 [2023-08-30 02:10:26,793 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1356 transitions. [2023-08-30 02:10:26,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1356 transitions. [2023-08-30 02:10:26,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:10:26,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1356 transitions. [2023-08-30 02:10:26,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states 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 02:10:26,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states 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 02:10:26,796 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states 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 02:10:26,796 INFO L175 Difference]: Start difference. First operand has 137 places, 121 transitions, 807 flow. Second operand 4 states and 1356 transitions. [2023-08-30 02:10:26,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 168 transitions, 1292 flow [2023-08-30 02:10:26,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 168 transitions, 1288 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:10:26,820 INFO L231 Difference]: Finished difference. Result has 140 places, 122 transitions, 821 flow [2023-08-30 02:10:26,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=821, PETRI_PLACES=140, PETRI_TRANSITIONS=122} [2023-08-30 02:10:26,821 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 1 predicate places. [2023-08-30 02:10:26,821 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 122 transitions, 821 flow [2023-08-30 02:10:26,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 321.5) internal successors, (1286), 4 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states 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 02:10:26,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:10:26,821 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:10:26,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-30 02:10:26,822 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:10:26,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:10:26,822 INFO L85 PathProgramCache]: Analyzing trace with hash -389843816, now seen corresponding path program 1 times [2023-08-30 02:10:26,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:10:26,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538596231] [2023-08-30 02:10:26,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:10:26,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:10:26,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:10:26,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:10:26,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:10:26,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538596231] [2023-08-30 02:10:26,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538596231] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:10:26,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:10:26,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:10:26,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327910495] [2023-08-30 02:10:26,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:10:26,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:10:26,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:10:26,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:10:26,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:10:26,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 753 [2023-08-30 02:10:26,872 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 122 transitions, 821 flow. Second operand has 3 states, 3 states have (on average 327.3333333333333) internal successors, (982), 3 states have internal predecessors, (982), 0 states have call successors, (0), 0 states 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 02:10:26,872 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:10:26,872 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 753 [2023-08-30 02:10:26,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:10:27,318 INFO L130 PetriNetUnfolder]: 2775/5047 cut-off events. [2023-08-30 02:10:27,318 INFO L131 PetriNetUnfolder]: For 5031/5042 co-relation queries the response was YES. [2023-08-30 02:10:27,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13941 conditions, 5047 events. 2775/5047 cut-off events. For 5031/5042 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 28180 event pairs, 1432 based on Foata normal form. 11/4844 useless extension candidates. Maximal degree in co-relation 13901. Up to 2521 conditions per place. [2023-08-30 02:10:27,346 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 122 selfloop transitions, 3 changer transitions 0/139 dead transitions. [2023-08-30 02:10:27,347 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 139 transitions, 1140 flow [2023-08-30 02:10:27,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:10:27,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:10:27,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1030 transitions. [2023-08-30 02:10:27,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45595396193005755 [2023-08-30 02:10:27,348 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1030 transitions. [2023-08-30 02:10:27,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1030 transitions. [2023-08-30 02:10:27,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:10:27,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1030 transitions. [2023-08-30 02:10:27,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 343.3333333333333) internal successors, (1030), 3 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states 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 02:10:27,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:10:27,350 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:10:27,351 INFO L175 Difference]: Start difference. First operand has 140 places, 122 transitions, 821 flow. Second operand 3 states and 1030 transitions. [2023-08-30 02:10:27,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 139 transitions, 1140 flow [2023-08-30 02:10:27,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 139 transitions, 1132 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 02:10:27,368 INFO L231 Difference]: Finished difference. Result has 141 places, 122 transitions, 828 flow [2023-08-30 02:10:27,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=828, PETRI_PLACES=141, PETRI_TRANSITIONS=122} [2023-08-30 02:10:27,369 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 2 predicate places. [2023-08-30 02:10:27,369 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 122 transitions, 828 flow [2023-08-30 02:10:27,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 327.3333333333333) internal successors, (982), 3 states have internal predecessors, (982), 0 states have call successors, (0), 0 states 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 02:10:27,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:10:27,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:10:27,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-30 02:10:27,370 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:10:27,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:10:27,371 INFO L85 PathProgramCache]: Analyzing trace with hash -474233831, now seen corresponding path program 1 times [2023-08-30 02:10:27,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:10:27,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888140736] [2023-08-30 02:10:27,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:10:27,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:10:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:10:27,452 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 02:10:27,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:10:27,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888140736] [2023-08-30 02:10:27,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888140736] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:10:27,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:10:27,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:10:27,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172017043] [2023-08-30 02:10:27,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:10:27,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:10:27,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:10:27,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:10:27,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:10:27,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 753 [2023-08-30 02:10:27,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 122 transitions, 828 flow. Second operand has 3 states, 3 states have (on average 326.0) internal successors, (978), 3 states have internal predecessors, (978), 0 states have call successors, (0), 0 states 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 02:10:27,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:10:27,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 753 [2023-08-30 02:10:27,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:10:27,920 INFO L130 PetriNetUnfolder]: 2270/4315 cut-off events. [2023-08-30 02:10:27,920 INFO L131 PetriNetUnfolder]: For 3323/3326 co-relation queries the response was YES. [2023-08-30 02:10:27,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11882 conditions, 4315 events. 2270/4315 cut-off events. For 3323/3326 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 23431 event pairs, 619 based on Foata normal form. 375/4589 useless extension candidates. Maximal degree in co-relation 11841. Up to 2858 conditions per place. [2023-08-30 02:10:27,944 INFO L137 encePairwiseOnDemand]: 747/753 looper letters, 114 selfloop transitions, 7 changer transitions 0/135 dead transitions. [2023-08-30 02:10:27,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 135 transitions, 1126 flow [2023-08-30 02:10:27,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:10:27,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:10:27,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1021 transitions. [2023-08-30 02:10:27,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45196989818503763 [2023-08-30 02:10:27,946 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1021 transitions. [2023-08-30 02:10:27,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1021 transitions. [2023-08-30 02:10:27,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:10:27,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1021 transitions. [2023-08-30 02:10:27,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 340.3333333333333) internal successors, (1021), 3 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states 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 02:10:27,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:10:27,948 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:10:27,948 INFO L175 Difference]: Start difference. First operand has 141 places, 122 transitions, 828 flow. Second operand 3 states and 1021 transitions. [2023-08-30 02:10:27,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 135 transitions, 1126 flow [2023-08-30 02:10:27,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 135 transitions, 1120 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:10:27,959 INFO L231 Difference]: Finished difference. Result has 141 places, 122 transitions, 836 flow [2023-08-30 02:10:27,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=836, PETRI_PLACES=141, PETRI_TRANSITIONS=122} [2023-08-30 02:10:27,959 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 2 predicate places. [2023-08-30 02:10:27,960 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 122 transitions, 836 flow [2023-08-30 02:10:27,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 326.0) internal successors, (978), 3 states have internal predecessors, (978), 0 states have call successors, (0), 0 states 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 02:10:27,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:10:27,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:10:27,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-30 02:10:27,961 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:10:27,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:10:27,961 INFO L85 PathProgramCache]: Analyzing trace with hash -661974617, now seen corresponding path program 1 times [2023-08-30 02:10:27,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:10:27,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144497905] [2023-08-30 02:10:27,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:10:27,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:10:27,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:10:28,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 02:10:28,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:10:28,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144497905] [2023-08-30 02:10:28,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144497905] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:10:28,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340521546] [2023-08-30 02:10:28,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:10:28,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:10:28,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:10:28,045 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 02:10:28,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 02:10:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:10:28,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 02:10:28,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:10:28,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 02:10:28,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:10:28,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 02:10:28,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340521546] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:10:28,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:10:28,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-30 02:10:28,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836031346] [2023-08-30 02:10:28,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:10:28,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 02:10:28,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:10:28,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 02:10:28,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 02:10:28,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 753 [2023-08-30 02:10:28,348 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 122 transitions, 836 flow. Second operand has 7 states, 7 states have (on average 325.2857142857143) internal successors, (2277), 7 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states 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 02:10:28,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:10:28,348 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 753 [2023-08-30 02:10:28,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:10:29,316 INFO L130 PetriNetUnfolder]: 3466/7091 cut-off events. [2023-08-30 02:10:29,316 INFO L131 PetriNetUnfolder]: For 5649/5674 co-relation queries the response was YES. [2023-08-30 02:10:29,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19182 conditions, 7091 events. 3466/7091 cut-off events. For 5649/5674 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 47032 event pairs, 538 based on Foata normal form. 611/7386 useless extension candidates. Maximal degree in co-relation 19141. Up to 1443 conditions per place. [2023-08-30 02:10:29,366 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 316 selfloop transitions, 6 changer transitions 0/338 dead transitions. [2023-08-30 02:10:29,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 338 transitions, 2518 flow [2023-08-30 02:10:29,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 02:10:29,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 02:10:29,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2149 transitions. [2023-08-30 02:10:29,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4756529437804338 [2023-08-30 02:10:29,369 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2149 transitions. [2023-08-30 02:10:29,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2149 transitions. [2023-08-30 02:10:29,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:10:29,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2149 transitions. [2023-08-30 02:10:29,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 358.1666666666667) internal successors, (2149), 6 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states 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 02:10:29,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 753.0) internal successors, (5271), 7 states have internal predecessors, (5271), 0 states have call successors, (0), 0 states 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 02:10:29,374 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 753.0) internal successors, (5271), 7 states have internal predecessors, (5271), 0 states have call successors, (0), 0 states 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 02:10:29,374 INFO L175 Difference]: Start difference. First operand has 141 places, 122 transitions, 836 flow. Second operand 6 states and 2149 transitions. [2023-08-30 02:10:29,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 338 transitions, 2518 flow [2023-08-30 02:10:29,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 338 transitions, 2495 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:10:29,395 INFO L231 Difference]: Finished difference. Result has 149 places, 125 transitions, 870 flow [2023-08-30 02:10:29,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=870, PETRI_PLACES=149, PETRI_TRANSITIONS=125} [2023-08-30 02:10:29,395 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 10 predicate places. [2023-08-30 02:10:29,396 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 125 transitions, 870 flow [2023-08-30 02:10:29,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 325.2857142857143) internal successors, (2277), 7 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states 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 02:10:29,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:10:29,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:10:29,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 02:10:29,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:10:29,605 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:10:29,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:10:29,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1551848466, now seen corresponding path program 1 times [2023-08-30 02:10:29,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:10:29,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068751981] [2023-08-30 02:10:29,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:10:29,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:10:29,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:10:30,589 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 02:10:30,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:10:30,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068751981] [2023-08-30 02:10:30,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068751981] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:10:30,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:10:30,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-30 02:10:30,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731525058] [2023-08-30 02:10:30,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:10:30,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 02:10:30,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:10:30,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 02:10:30,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-08-30 02:10:32,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 753 [2023-08-30 02:10:32,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 125 transitions, 870 flow. Second operand has 15 states, 15 states have (on average 273.93333333333334) internal successors, (4109), 15 states have internal predecessors, (4109), 0 states have call successors, (0), 0 states 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 02:10:32,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:10:32,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 753 [2023-08-30 02:10:32,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:10:33,889 INFO L130 PetriNetUnfolder]: 3870/7558 cut-off events. [2023-08-30 02:10:33,889 INFO L131 PetriNetUnfolder]: For 12158/12190 co-relation queries the response was YES. [2023-08-30 02:10:33,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23327 conditions, 7558 events. 3870/7558 cut-off events. For 12158/12190 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 47709 event pairs, 1991 based on Foata normal form. 23/7234 useless extension candidates. Maximal degree in co-relation 23282. Up to 3690 conditions per place. [2023-08-30 02:10:33,939 INFO L137 encePairwiseOnDemand]: 737/753 looper letters, 194 selfloop transitions, 46 changer transitions 0/247 dead transitions. [2023-08-30 02:10:33,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 247 transitions, 2097 flow [2023-08-30 02:10:33,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 02:10:33,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 02:10:33,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 4236 transitions. [2023-08-30 02:10:33,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3750332005312085 [2023-08-30 02:10:33,942 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 4236 transitions. [2023-08-30 02:10:33,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 4236 transitions. [2023-08-30 02:10:33,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:10:33,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 4236 transitions. [2023-08-30 02:10:33,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 282.4) internal successors, (4236), 15 states have internal predecessors, (4236), 0 states have call successors, (0), 0 states 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 02:10:33,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 753.0) internal successors, (12048), 16 states have internal predecessors, (12048), 0 states have call successors, (0), 0 states 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 02:10:33,956 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 753.0) internal successors, (12048), 16 states have internal predecessors, (12048), 0 states have call successors, (0), 0 states 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 02:10:33,956 INFO L175 Difference]: Start difference. First operand has 149 places, 125 transitions, 870 flow. Second operand 15 states and 4236 transitions. [2023-08-30 02:10:33,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 247 transitions, 2097 flow [2023-08-30 02:10:33,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 247 transitions, 1992 flow, removed 39 selfloop flow, removed 1 redundant places. [2023-08-30 02:10:33,992 INFO L231 Difference]: Finished difference. Result has 167 places, 131 transitions, 1029 flow [2023-08-30 02:10:33,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1029, PETRI_PLACES=167, PETRI_TRANSITIONS=131} [2023-08-30 02:10:33,993 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 28 predicate places. [2023-08-30 02:10:33,993 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 131 transitions, 1029 flow [2023-08-30 02:10:33,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 273.93333333333334) internal successors, (4109), 15 states have internal predecessors, (4109), 0 states have call successors, (0), 0 states 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 02:10:33,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:10:33,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:10:33,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-30 02:10:33,995 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:10:33,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:10:33,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1021400250, now seen corresponding path program 2 times [2023-08-30 02:10:33,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:10:33,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109125374] [2023-08-30 02:10:33,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:10:33,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:10:34,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:10:34,908 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 02:10:34,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:10:34,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109125374] [2023-08-30 02:10:34,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109125374] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:10:34,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:10:34,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-08-30 02:10:34,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397750718] [2023-08-30 02:10:34,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:10:34,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 02:10:34,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:10:34,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 02:10:34,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-08-30 02:10:36,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 753 [2023-08-30 02:10:36,708 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 131 transitions, 1029 flow. Second operand has 16 states, 16 states have (on average 260.8125) internal successors, (4173), 16 states have internal predecessors, (4173), 0 states have call successors, (0), 0 states 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 02:10:36,708 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:10:36,708 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 753 [2023-08-30 02:10:36,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:10:37,955 INFO L130 PetriNetUnfolder]: 3849/7565 cut-off events. [2023-08-30 02:10:37,956 INFO L131 PetriNetUnfolder]: For 11518/11550 co-relation queries the response was YES. [2023-08-30 02:10:37,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23497 conditions, 7565 events. 3849/7565 cut-off events. For 11518/11550 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 47769 event pairs, 1271 based on Foata normal form. 23/7245 useless extension candidates. Maximal degree in co-relation 23446. Up to 2764 conditions per place. [2023-08-30 02:10:38,015 INFO L137 encePairwiseOnDemand]: 737/753 looper letters, 193 selfloop transitions, 47 changer transitions 0/247 dead transitions. [2023-08-30 02:10:38,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 247 transitions, 2140 flow [2023-08-30 02:10:38,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 02:10:38,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 02:10:38,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 4033 transitions. [2023-08-30 02:10:38,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3570606463036742 [2023-08-30 02:10:38,018 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 4033 transitions. [2023-08-30 02:10:38,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 4033 transitions. [2023-08-30 02:10:38,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:10:38,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 4033 transitions. [2023-08-30 02:10:38,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 268.8666666666667) internal successors, (4033), 15 states have internal predecessors, (4033), 0 states have call successors, (0), 0 states 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 02:10:38,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 753.0) internal successors, (12048), 16 states have internal predecessors, (12048), 0 states have call successors, (0), 0 states 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 02:10:38,030 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 753.0) internal successors, (12048), 16 states have internal predecessors, (12048), 0 states have call successors, (0), 0 states 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 02:10:38,030 INFO L175 Difference]: Start difference. First operand has 167 places, 131 transitions, 1029 flow. Second operand 15 states and 4033 transitions. [2023-08-30 02:10:38,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 247 transitions, 2140 flow [2023-08-30 02:10:38,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 247 transitions, 2059 flow, removed 10 selfloop flow, removed 9 redundant places. [2023-08-30 02:10:38,070 INFO L231 Difference]: Finished difference. Result has 176 places, 136 transitions, 1120 flow [2023-08-30 02:10:38,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=956, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1120, PETRI_PLACES=176, PETRI_TRANSITIONS=136} [2023-08-30 02:10:38,071 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 37 predicate places. [2023-08-30 02:10:38,071 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 136 transitions, 1120 flow [2023-08-30 02:10:38,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 260.8125) internal successors, (4173), 16 states have internal predecessors, (4173), 0 states have call successors, (0), 0 states 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 02:10:38,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:10:38,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:10:38,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-30 02:10:38,072 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:10:38,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:10:38,073 INFO L85 PathProgramCache]: Analyzing trace with hash 634248710, now seen corresponding path program 1 times [2023-08-30 02:10:38,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:10:38,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764798791] [2023-08-30 02:10:38,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:10:38,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:10:38,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:10:39,980 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 02:10:39,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:10:39,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764798791] [2023-08-30 02:10:39,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764798791] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:10:39,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:10:39,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-30 02:10:39,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391412580] [2023-08-30 02:10:39,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:10:39,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 02:10:39,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:10:39,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 02:10:39,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-08-30 02:10:47,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 753 [2023-08-30 02:10:47,741 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 136 transitions, 1120 flow. Second operand has 16 states, 16 states have (on average 261.875) internal successors, (4190), 16 states have internal predecessors, (4190), 0 states have call successors, (0), 0 states 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 02:10:47,741 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:10:47,741 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 753 [2023-08-30 02:10:47,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:10:50,382 INFO L130 PetriNetUnfolder]: 5003/9805 cut-off events. [2023-08-30 02:10:50,382 INFO L131 PetriNetUnfolder]: For 16636/16676 co-relation queries the response was YES. [2023-08-30 02:10:50,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30841 conditions, 9805 events. 5003/9805 cut-off events. For 16636/16676 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 65457 event pairs, 2778 based on Foata normal form. 0/9431 useless extension candidates. Maximal degree in co-relation 30787. Up to 5662 conditions per place. [2023-08-30 02:10:50,446 INFO L137 encePairwiseOnDemand]: 735/753 looper letters, 237 selfloop transitions, 42 changer transitions 0/286 dead transitions. [2023-08-30 02:10:50,446 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 286 transitions, 2567 flow [2023-08-30 02:10:50,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 02:10:50,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 02:10:50,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3816 transitions. [2023-08-30 02:10:50,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3619806488332385 [2023-08-30 02:10:50,449 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3816 transitions. [2023-08-30 02:10:50,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3816 transitions. [2023-08-30 02:10:50,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:10:50,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3816 transitions. [2023-08-30 02:10:50,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 272.57142857142856) internal successors, (3816), 14 states have internal predecessors, (3816), 0 states have call successors, (0), 0 states 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 02:10:50,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 753.0) internal successors, (11295), 15 states have internal predecessors, (11295), 0 states have call successors, (0), 0 states 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 02:10:50,461 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 753.0) internal successors, (11295), 15 states have internal predecessors, (11295), 0 states have call successors, (0), 0 states 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 02:10:50,462 INFO L175 Difference]: Start difference. First operand has 176 places, 136 transitions, 1120 flow. Second operand 14 states and 3816 transitions. [2023-08-30 02:10:50,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 286 transitions, 2567 flow [2023-08-30 02:10:50,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 286 transitions, 2488 flow, removed 5 selfloop flow, removed 9 redundant places. [2023-08-30 02:10:50,515 INFO L231 Difference]: Finished difference. Result has 188 places, 146 transitions, 1334 flow [2023-08-30 02:10:50,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=1054, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1334, PETRI_PLACES=188, PETRI_TRANSITIONS=146} [2023-08-30 02:10:50,515 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 49 predicate places. [2023-08-30 02:10:50,515 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 146 transitions, 1334 flow [2023-08-30 02:10:50,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 261.875) internal successors, (4190), 16 states have internal predecessors, (4190), 0 states have call successors, (0), 0 states 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 02:10:50,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:10:50,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:10:50,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-30 02:10:50,516 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:10:50,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:10:50,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1261413180, now seen corresponding path program 2 times [2023-08-30 02:10:50,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:10:50,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053093635] [2023-08-30 02:10:50,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:10:50,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:10:50,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15